JPWO2004058926A1 - Liquid fuel for internal combustion engines - Google Patents

Abstract

The present invention relates to an internal combustion engine comprising 2 to 85% by weight of an aliphatic monovalent alcohol alone or mixed alcohol component having 2 to 6 carbon atoms in the molecule and 15 to 98% by weight of a hydrocarbon component. A liquid fuel for an internal combustion engine, which contains an amount of an aluminum corrosion inhibitor capable of preventing aluminum corrosion at a predetermined temperature, and the aluminum corrosion inhibitor is carbonized with methanol or glycols. At least one of hydrogen, ketone hydrocarbons, ester hydrocarbons, and aldehyde hydrocarbons is used.

Description

  The present invention relates to an improvement in liquid fuel that can achieve the same efficiency or higher output as that of conventional gasoline without requiring a change in the structure or material of an existing gasoline internal combustion engine.

As part of efforts to address environmental issues in recent years, the problem of air pollution caused by automobile exhaust gases has become more important, and carbon monoxide (CO) and hydrocarbons in these automobile exhaust gases Alcohol fuels obtained by adding alcohol to light naphtha have attracted attention as fuels for internal combustion engines that can be used in place of conventional gasoline with a significantly reduced (HC) concentration, and are being studied for practical use.
As described above, these synthetic liquid fuels containing light naphtha and alcohol, together with carbon monoxide (CO) and hydrocarbon (HC), have substantially a sulfur component in alcohol and the like compared to light naphtha and the like. Although it is preferable because SOx can be reduced because it is small, when these synthetic liquid fuels come into contact with metals, particularly aluminum, aluminum alloys, etc., at high temperatures and high pressures in fuel injection devices, etc., because they contain alcohol, There has been a problem that aluminum alloys and the like corrode (elution) and cause failure in long-term use.
Therefore, the present invention has been made paying attention to the above-mentioned problems, and does not cause corrosion (elution) of metals, particularly aluminum and aluminum alloys, etc., due to the synthetic liquid fuel containing these alcohols. An object is to provide an excellent liquid fuel for an internal combustion engine.

In order to achieve the above-described object, the liquid fuel for an internal combustion engine of the present invention comprises an aliphatic monovalent alcohol alone or a mixed alcohol component having 2 to 6 carbon atoms in the molecule of 2 to 85% by weight. A liquid fuel for an internal combustion engine containing 15 to 98% by weight of a hydrocarbon component,
When the alcohol component in the liquid fuel for an internal combustion engine is N wt%, 0.002 × N wt% or more or 0.1 wt% of the liquid fuel for an internal combustion engine to be obtained, whichever is larger It is characterized by the addition of water.
According to this feature, when the alcohol component in the obtained liquid fuel for an internal combustion engine is N wt%, 0.002 × N wt% or more or 0.1 wt% of the obtained liquid fuel for an internal combustion engine By adding the larger amount of water, it is possible to obtain an extremely practical liquid fuel for internal combustion engines that does not cause corrosion (elution) of metals, particularly aluminum and aluminum alloys. .
The liquid fuel for an internal combustion engine of the present invention comprises 2 to 85% by weight of an aliphatic monovalent alcohol alone or mixed alcohol component having 2 to 6 carbon atoms in the molecule and 15 to 98% by weight of a hydrocarbon component. %, A liquid fuel for an internal combustion engine,
The obtained liquid fuel for an internal combustion engine includes an aluminum corrosion inhibitor in an amount capable of preventing aluminum corrosion at a predetermined temperature, and the aluminum corrosion inhibitor includes methanol, glycol hydrocarbons, ketone hydrocarbons, It is characterized in that at least one of ester hydrocarbons and aldehyde hydrocarbons is one.
According to this feature, by using at least one of methanol, glycol hydrocarbons, ketone hydrocarbons, ester hydrocarbons, aldehyde hydrocarbons as an aluminum corrosion inhibitor, metals such as aluminum and In addition to being able to obtain an extremely practical liquid fuel for internal combustion engines that does not cause corrosion (elution) of aluminum alloys, etc., it is possible to avoid separation of alcohol and hydrocarbon at low temperatures, A liquid fuel for an internal combustion engine having excellent low temperature stability can also be obtained.
The liquid fuel for an internal combustion engine of the present invention preferably contains at least water as the aluminum corrosion inhibitor.
In this way, by using inexpensive water as part of the aluminum corrosion inhibitor, the amount of the aluminum corrosion inhibitor other than the relatively expensive water can be reduced, and the cost of the liquid fuel for the internal combustion engine obtained can be reduced. The rise can be prevented.
The liquid fuel for an internal combustion engine of the present invention contains at least one ether component having 12 or less carbon atoms in the molecule and having at least one ether bond in the molecule. It is preferable.
In this way, by including the ether component, it is possible to prevent the alcohol component and the hydrocarbon component in the obtained liquid fuel from being separated during long-term storage or the like.

FIG. 1 is a flowchart showing a method for producing a liquid fuel for an internal combustion engine in an embodiment of the present invention.
FIG. 2 is a graph showing the relationship between the ratio of alcohol and hydrocarbon components in liquid fuel and the concentration of pollutant gas in exhaust gas.
FIG. 3 is a view showing each compounding composition in this example.
FIG. 4 is a diagram showing the test results of Formulation 1 of this example.
FIG. 5 is a diagram showing the test results of Formulation 2 of this example.
FIG. 6 is a diagram showing the test results of Formulation 3 in this example.
FIG. 7 is a diagram showing the test results of Formulation 4 in this example.
FIG. 8 is a diagram showing the test results of Formulation 5 in this example.
FIG. 9 is a diagram showing the test results of Formulation 6 in this example.
FIG. 10 is a diagram showing the test results of Formulation 7 in this example.
FIG. 11 is a diagram showing the test results of Formulation 8 in this example.
FIG. 12 is a diagram showing the test results of Formulation 9 in this example.
FIG. 13 is a diagram showing the test results of Formulation 10 of this example.
FIG. 14 is a diagram showing the test results of Formulation 11 in this example.
FIG. 15 is a diagram showing the test results of Formulation 12 in this example.
FIG. 16 is a diagram showing the test results of Formulation 13 in this example.
FIG. 17 is a diagram showing the test results of Formulation 14 in this example.
FIG. 18 is a diagram showing the test results of Formulation 15 in this example.
FIG. 19 is a diagram showing the test results of Formulation 16 (Formulation 1 + Ether) of this example.
FIG. 20 is a diagram showing the test results of Formulation 17 (Formulation 2+ Ether) of this example.
FIG. 21 is a view showing the test results of Formulation 18 (Formulation 3 + Ether) of this example.
FIG. 22 is a diagram showing the test results of Formulation 19 (Formulation 4 + Ether) of this example.
FIG. 23 is a diagram showing the test results of Formulation 20 (Formulation 5 + Ether) of this example.
FIG. 24 is a diagram showing the test results of Formulation 21 (Formulation 6 + Ether) of this example.
FIG. 25 is a diagram showing the test results of Formulation 22 (Formulation 7 + Ether) of this example.
FIG. 26 is a diagram showing the test results of Formulation 23 (Formulation 8 + Ether) of this example.
FIG. 27 is a diagram showing the test results of Formulation 24 (Formulation 9 + Ether) of this example.
FIG. 28 is a diagram showing the test results of Formulation 25 (Formulation 10 + Ether) of this example.
FIG. 29 is a diagram showing the test results of Formulation 26 (Formulation 11 + Ether) of this example.
FIG. 30 is a diagram showing the test results of Formulation 27 (Formulation 12 + Ether) of this example.
FIG. 31 is a view showing the test results of Formulation 28 (Formulation 13 + Ether) of this example.
FIG. 32 is a diagram showing the test results of Formulation 29 (Formulation 14 + Ether) in this example.
FIG. 33 is a diagram showing the test results of Formulation 30 (Formulation 15 + Ether) of this example.
FIG. 34 is a view showing the test results of Formulation 0 in this example.
FIG. 35 is a diagram showing the effect of adding water and an aluminum corrosion inhibitor in each formulation of this example.
FIG. 36 is a diagram showing the relationship between the amount of alcohol added and aluminum corrosion.
FIG. 37 is a diagram showing a verification composition of the minimum amount of water added and verification results.

The following alcohols, hydrocarbons and ethers as main raw materials used in the present invention, and methanol, glycol hydrocarbons, ketone hydrocarbons, ester hydrocarbons, aldehyde hydrocarbons, and water as aluminum corrosion inhibitors. About each of these, the content ratio in the obtained synthetic liquid fuel, what can be used conveniently, and the reason are demonstrated below.
First, as the main raw material alcohol that is a main component of the resultant synthetic liquid fuel, linear or non-linear alcohols having 2 to 6 carbon atoms in the alcohol molecule are preferably used. it can. These main raw material alcohols can be obtained by using alcohols having more carbon atoms than ethyl alcohols having 2 carbon atoms in the molecule so as not to contain much methanol, which is an alcohol having 1 carbon number that is significantly more polar. Therefore, it is possible to avoid the polarity of the whole synthetic liquid fuel from being increased and swelling of the rubber pipe or the like for fuel supply by methanol having a large polarity.
As these main raw material alcohols, secondary and tertiary polyhydric alcohols exist, but these higher alcohols are expensive and difficult to obtain, resulting in an increase in the price of the resulting synthetic liquid fuel. Therefore, it is preferable to use a primary alcohol (monovalent).
Further, if the number of carbon atoms in the molecular chain contained in these alcohol molecules is 7 or more, particularly more than 10, the volatility at normal room temperature or low temperature is greatly reduced, and the combustion time in combustion is reduced. Since it tends to be long, a difference from the combustion rate of hydrocarbons is likely to occur, making it unsuitable as a gasoline alternative fuel. 6 or less is preferable.
Further, as these main raw material alcohols, not only the alcohol itself but also two or more kinds of appropriate alcohols which are different depending on the price, availability, plant capacity and the like can be mixed and used. By using two or more kinds of different alcohols together in this way, the ratio of these alcohols can be changed appropriately by varying the specific gravity of the synthetic fuel due to variations in the composition of light naphtha and recycled hydrocarbons used as liquid fuel. In addition to being able to adjust, the burning rate is somewhat different for each alcohol, so combining these alcohols makes it possible to match the burning rate with gasoline and use these gasoline facilities The combination of these alcohols is preferably ethanol, normal propanol (NPA), isopropyl alcohol (IPA), isobutyl alcohol (IBA), butyl alcohol, pen from the viewpoint of price and volatility. Tanor, Heki It is preferable to combine Knoll, etc. appropriately, especially, a fatty monohydric alcohol non linear system is preferred because it can increase the octane number obtained thereby, the present invention is not limited thereto.
The ratio of these alcohols in the synthetic fuel is, as shown in FIG. 2, by adding alcohol to light naphtha, which is a gasoline component, so that carbon monoxide (CO) and hydrocarbons (HC) in the exhaust gas. And the concentration of hydrocarbons (HC) in the exhaust gas becomes substantially constant, while carbon monoxide in the exhaust gas ( It can be seen that the concentration of CO) gradually decreases to an alcohol ratio of about 85% by weight. When the alcohol ratio exceeds about 85% by weight, it can be seen that the concentrations of carbon monoxide (CO) and hydrocarbon (HC) in the exhaust gas are almost the same as in the case of the alcohol alone, but the alcohol ratio is about If it exceeds 85% by weight, the combustion speed of the obtained fuel is not the combustion speed of hydrocarbons but the combustion speed of alcohol, and good combustion can be obtained in an internal combustion engine conventionally used for gasoline. In particular, the inconvenience that it becomes inappropriate for the combustion speed at a high rotation occurs, so it is preferable to set it to 85% by weight or less.
In addition, as shown in FIG. 36, the lower limit of the alcohol ratio is such that when ethanol, which is an alcohol, is added to light naphtha, even if it contains only 2% by weight of ethanol, Since weight loss due to elution is observed, the aluminum corrosion prevention effect of the present invention can be obtained at these 2% by weight or more, so it should be 2% by weight or more. The ratio may be in the range of 2 to 85% by weight.
More preferably, from the results shown in FIG. 36, when the alcohol ratio exceeds 10% by weight, weight loss due to aluminum elution occurs even at 240 ° C. for 240 hours. From the results shown in FIG. If the amount is less than 15% by weight, the hydrocarbon (HC) is remarkably increased. If the alcohol ratio exceeds 75% by weight, depending on the type of the internal combustion engine, as described above, there is a difference in the combustion speed between the hydrocarbon and the alcohol. For this reason, there is a possibility that the running may be hindered due to an asynchronous phenomenon of combustion, and therefore the alcohol ratio may be in the range of 15 to 75% by weight.
Next, a saturated or unsaturated hydrocarbon can be suitably used as the hydrocarbon. However, when the number of carbons contained in the hydrocarbon molecule exceeds 13, the volatility is lowered and the ignition device is ignited. Since the concentration of CO and HC in the exhaust gas increases due to the reduction in capacity and the residue during combustion, the concentration of CO and HC in the exhaust gas due to the residue during combustion and ignition of the ignition device It may be selected as appropriate in consideration of capacity and the like, and preferably a saturated or unsaturated hydrocarbon having 9 or less carbon atoms. Among these, light naphtha, which is a mixture of saturated hydrocarbons, can be suitably used because of its low cost.
Many of these light naphthas contain aromatic hydrocarbons such as B (benzene), T (toluene), and X (xylene). If the concentration of these aromatic hydrocarbons is high, Similarly, the concentration of CO and HC in the exhaust gas increases, and these harmful aromatic hydrocarbons such as B (benzene), T (toluene), and X (xylene) themselves are discharged into the exhaust gas. Therefore, it is preferable to use those having a low content of each of these aromatic hydrocarbons such as B (benzene), T (toluene), and X (xylene).
Moreover, as these light naphtha, the sulfur content concentration inherently varies depending on the crude oil producing area, but if these sulfur content concentrations are high, SOx in the exhaust gas will increase, so that it will be 0.01% or less. It is preferable to desulfurize.
In addition to these light naphthas, waste plastics that are currently being processed in large quantities were liquefied and recycled oil, which is an integral part of the recycling process, to an initial boiling point of 38-60 ° C and an end point of 180-220 ° C. Re-oiling can also be used. Since these regenerated oils are desulfurized at the stage of naphtha which is a plastic raw material, SOx in the exhaust gas can be further reduced.
When using these recycled oils, if the initial boiling point exceeds 60 ° C., the startability will be significantly reduced when the temperature is low or in cold regions, and startability equivalent to gasoline will not be obtained, If the end point is higher than 220 ° C, the engine power cannot be generated as designed when the engine speed is high. Therefore, the initial boiling point is 38-60 ° C and the end point is 180-220 ° C. It is preferable to make it a regenerated oil.
Next, as the ether component, at least one ether having 12 or less carbon atoms in the molecule and having at least one ether bond in the molecule can be used.
Although these ether components are not necessarily required, it is preferable to add these ether components to prevent separation of hydrocarbon components and alcohol components due to secular change, etc. When adding components, the ratio depends on the ratio composition of the other components used, but may be appropriately selected depending on the storage stability to be obtained, but is usually 5% by weight or less. On the other hand, when the ether ratio is 30% by weight or more, an ether odor is generated as a fuel, and the volatility is significantly increased to increase the fuel evaporation amount. Since the loss increases, the content may be 5 to 30% by weight.
These ethers to be blended can be used as long as they have at least an ether bond in the molecule. However, if the number of carbon atoms in the ether molecule used is large, not only the volatility of the ether decreases, The ability to improve the compatibility between alcohol and hydrocarbon is reduced, the price is high, and it is difficult to obtain the amount as a fuel, so the carbon number may be 12 or less.
In addition, when using an ether having a relatively large number of carbon atoms, separation of hydrocarbon and alcohol is likely to occur as described above. For example, like diethylene glycol dimethyl ether and ethylene glycol diethyl ether, By having two or more ether bonds in the molecule, or using one having a hydroxyl group (OH) in addition to the ether bond in the molecule, such as ethylene glycol monoethyl ether, It is preferable to avoid separation of hydrocarbon and alcohol due to lowering, and by using those having a plurality of ether bonds or a hydroxyl group (OH) in addition to the ether bonds in these molecules, the conventional low carbon number You may make it acquire the separation prevention effect equivalent to or more than ether.
These ethers are not only a single ether but also a mixture of a low-carbon ether and a high-carbon ether in view of price, volatility and compatibility between the hydrocarbon and the alcohol. It may be used.
Next, methanol, glycol hydrocarbons, ketone hydrocarbons, ester hydrocarbons, aldehyde hydrocarbons, and water can be used as the aluminum corrosion inhibitor.
As the glycol hydrocarbons used as the aluminum corrosion inhibitor, polymers having a high viscosity have a high viscosity, and the viscosity of the resultant synthetic fuel is increased. Therefore, ethylene glycol or propylene glycol having a relatively low molecular weight is preferable. Can be used for
In addition, the ketone hydrocarbon used as an aluminum corrosion inhibitor may be a hydrocarbon having at least one ketone bond in the molecule, and the ketone hydrocarbon having a large number of carbon atoms is expensive. From the above, acetone, dimethyl ketone, methyl ethyl ketone, diethyl ketone, methyl n propyl ketone, methyl isobutyl ketone, acetylacetone and the like having a relatively small number of carbon atoms in the molecule can be preferably used.
The ester hydrocarbon used as an aluminum corrosion inhibitor may be a hydrocarbon having at least one ester bond in the molecule, and ester hydrocarbons with a large number of carbon atoms are expensive. From the above, methyl formate, ethyl formate, methyl acetate, ethyl acetate and the like, which have a relatively small number of carbon atoms in the molecule, can be preferably used.
In addition, the aldehyde hydrocarbon used as an aluminum corrosion inhibitor may be a hydrocarbon having at least one aldehyde bond in the molecule, and the price of an aldehyde hydrocarbon having a large number of carbon atoms is high. From the above, acetaldehyde, propionaldehyde, butyraldehyde and the like having a relatively small number of carbon atoms in the molecule can be preferably used.
These aluminum corrosion inhibitors include methanol, glycol hydrocarbons, ketone hydrocarbons, ester hydrocarbons, aldehyde hydrocarbons, and the amount of water added. Since the price is higher than alcohol and naphtha, the minimum amount of aluminum corrosion due to dry corrosion at a predetermined temperature of the resulting synthetic liquid fuel, for example, 80 to 120 degrees, may be set. As shown in the examples to be described later, although it depends on the type of the aluminum corrosion inhibitor to be used, it may be at most 10% by weight.

FIG. 1 is a flowchart showing a method of manufacturing a liquid fuel for an internal combustion engine according to this embodiment. The liquid fuel for an internal combustion engine of the present invention has at least one aliphatic monovalent (primary) alcohol, saturated or unsaturated hydrocarbon, a molecule having 12 or less carbon atoms, and an ether bond in the molecule. It is mainly composed of single component or mixed ether containing ether and aluminum corrosion inhibitor (including water). After each raw fuel is weighed to a predetermined weight percent, it is relatively large in weight and polar. First, an ether having a smaller polarity than the aliphatic primary alcohol is added to and mixed with the light naphtha as the smallest hydrocarbon.
Next, the measured alcohol and aluminum corrosion inhibitor are added to and mixed with the mixture of these lightweight naphtha and ether.
After adding the alcohol and the aluminum corrosion inhibitor, the specific gravity of the mixed liquid fuel is measured, and when the specific gravity is not more than a predetermined specific gravity of 0.735 or more, the specific gravity is 0.755. The specific gravity may be adjusted by appropriately adding the alcohol.
Hereinafter, blending examples of the fuel composition produced in this example by the above-described manufacturing method will be shown below. In this example, as shown in FIG. 3, various basic formulations are prepared in combination with the ratio of alcohol added to naphtha, and each basic formulation includes methanol, glycol hydrocarbons as various aluminum corrosion inhibitors, Make a blend of ketone hydrocarbons, ester hydrocarbons, aldehyde hydrocarbons, and water, and immerse aluminum in each blend to conduct corrosion tests on aluminum at a predetermined high temperature. The low temperature stability was evaluated by the presence or absence of fuel separation at a low blending temperature (10 ° C. below zero in this example).
Below, based on FIGS. 4-34, the corrosion test result of aluminum at the time of adding an aluminum corrosion inhibitor to each mixing | blending, and the result of the storage stability of normal temperature and low temperature are demonstrated.
In addition, the test method of the elution amount (weight reduction) of aluminum, and the storage stability test method are as follows.
<Aluminum dissolution test>
(1) A predetermined amount of sample fuel and water (distilled water) are weighed into a SUS ball mill pot (300 ml) to make a total volume of 100 ml.
(2) Pure aluminum sample piece (A1050) is immersed in the container (1), and the aluminum sample piece is scratched with a file under the condition of being immersed in the sample fuel. (To remove the oxide film on the surface of the aluminum sample piece.)
(3) Replace the atmosphere gas in the ball mill pot with nitrogen and quickly close the lid.
(4) Place the ball mill pot in a constant temperature dryer set to a predetermined temperature of 80 ° C to 120 ° C.
(5) When a predetermined time has elapsed, the ball mill pot is taken out and allowed to cool in a fume hood.
{Circle around (6)} The weight loss of the aluminum sample piece was measured, and when there was any partial weight discoloration or pitting corrosion and there was any weight loss, it was indicated as 1 even if the weight loss did not reach zero.
<Storage stability test>
After blending the fuel, put it in the freezer (-11 ° C) after 1 hour standing at room temperature and take it out after standing for 1 day, observe the state of the fuel liquid, 100 that are compatible, cloudy Those with fuel or those with separated fuel were evaluated as 0.
First, the basic composition of E-2 which is formulation example 0 is 98% by weight of naphtha and 2% by weight of ethanol, the alcohol is only ethanol, and the ratio is the least compounding that causes aluminum corrosion. As shown in FIG. 34, even when the alcohol ratio is small like E-2, heating at 120 ° C. for 120 hours shows that there is a weight reduction due to aluminum corrosion due to dry corrosion as shown in FIG.
It can be seen that when 0.1% by weight of water is added to E2, weight loss due to aluminum corrosion at 120 ° C. is eliminated, and the corrosion resistance is improved. Further, when water is further added to 0.2% by weight and 0.4% by weight, those having no added water and those having 0.1% by weight added water have a low temperature of minus 10 While there is no problem with storage stability at 0 ° C., 0.2 wt% shows that layer separation occurs at minus 10 ° C., and 0.4 wt% water addition shows that layer separation occurs even at room temperature, Although the addition of water is effective for corrosion of aluminum, it can be seen that the storage stability is reduced by the addition of water.
On the other hand, the result of adding methanol in place of the water is shown in the formulation name “E2-Me” in FIG. It can be seen that when this methanol is added, the corrosion resistance of aluminum is improved when 0.5% by weight is added. Further, when 0.5% by weight of methanol is added, layer separation does not occur at room temperature and low temperature, and the storage stability at normal temperature and low temperature can be improved by addition of these methanol, so that these methanol is good as an aluminum corrosion inhibitor. It can be seen that it can be used.
Moreover, the result at the time of adding ethylene glycol as glycols instead of the said water is shown by the compounding name "E2-PG" of FIG. When this ethylene glycol is added, it can be seen that the addition of 0.5% by weight as in the case of methanol improves the corrosion resistance of aluminum, and good corrosion resistance of aluminum is obtained even at 120 ° C. In addition, no layer separation occurs at room temperature and low temperature, and storage stability at normal temperature and low temperature can be improved by addition of these ethylene glycols, so that these ethylene glycols can be used favorably as aluminum corrosion inhibitors.
Further, the result of adding acetone as a ketone instead of the water and the result of adding acetone together with water are shown in the formulation name “E2-Ac” in FIG. When this acetone is added alone without water, good corrosion resistance of aluminum at 120 ° C. is obtained with addition of 2.0% by weight, and both room temperature stability and low temperature stability are good results. It can be seen that these acetones can be used favorably as aluminum corrosion inhibitors.
Moreover, from the result when both acetone and water shown in “E2-Ac” in FIG. 34 are added, even when the amount of acetone is small, the corrosion resistance and room temperature stability of aluminum can be obtained by using it together with water. It can be seen that good results can be obtained in both stability and low-temperature stability, and by adding the acetone, it is good even in the case of containing 0.2% by weight of water that could not be stored at low temperature with water alone. It can be seen that low-temperature storage stability can be obtained, and it can be seen that these acetones have an effect of improving low-temperature stability, and that water has an effect of reducing the amount of acetone added.
Moreover, the result of adding ethyl formate alone as an ester in place of the water and the result of adding ethyl formate together with water are shown in the formulation name “E2-GE” in FIG. When this ethyl formate is added alone without water, the addition of 2.0% by weight provides good aluminum corrosion resistance at 120 ° C., as well as good room temperature stability and low temperature stability. The results are obtained and it can be seen that these ethyl formates can be successfully used as an aluminum corrosion inhibitor.
Moreover, from the result when both ethyl formate and water shown in “E2-GE” in FIG. 34 are added, by using together with water, the corrosion resistance of aluminum can be reduced even if the amount of ethyl formate is small. It can be seen that good results can be obtained for both room temperature stability and low temperature stability, and by adding the ethyl formate, when water alone contains 0.2% by weight of water, the low temperature storage stability could not be obtained. However, it can be seen that good low-temperature storage stability can be obtained, and it can be seen that these ethyl formates have the effect of improving the low-temperature stability, and that water has the effect of reducing the amount of ethyl formate added.
Further, the result of adding butyraldehyde alone as an aldehyde instead of the water and the result of adding butyraldehyde together with water are shown in the formulation name “E2-BA” in FIG. When this butyraldehyde is added alone without water, the addition of 1.5% by weight provides good aluminum corrosion resistance at 120 ° C., as well as good room temperature stability and low temperature stability. The results are obtained and it can be seen that these butyraldehydes can be used favorably as aluminum corrosion inhibitors.
Moreover, from the result when both butyraldehyde and water shown in “E2-BA” of FIG. 4 are arranged, even when the amount of butyraldehyde is small, the corrosion resistance of aluminum and room temperature can be obtained by using it together with water. It can be seen that good results can be obtained for both stability and low-temperature stability, and by adding the butyraldehyde, even when water alone contains 0.2% by weight of water, the low-temperature storage stability could not be obtained. It can be seen that good low-temperature storage stability can be obtained. It can be seen that these butyraldehydes have an effect of improving low-temperature stability, and that water has an effect of reducing the amount of butyraldehyde added.
Next, the basic composition of E10, which is Formulation Example 1, is 90% by weight of naphtha and 10% by weight of ethanol, the alcohol is only ethanol, and the ratio is relatively small. Like E10, even if the ratio of alcohol is small, the result of corrosion at 80 ° C. for 240 hours shown in the aluminum corrosion test (FIG. 36) is 120 ° C. for 120 hours at 120 ° C. When heated for 24 hours, it can be seen that there is a weight reduction due to aluminum corrosion due to dry corrosion, as shown in FIG.
In contrast to E10, when water is added up to 0.1% by weight at 100 ° C. and water is added up to 0.4% at 120 ° C., weight loss due to aluminum corrosion is eliminated, and corrosion resistance is improved. On the other hand, those with no added water or those with 0.1% by weight added have no problem in storage stability at minus 10 ° C., which is a low temperature, whereas weight due to aluminum corrosion at 120 ° C. When water is added to 0.4 wt% at which no reduction occurs, in these storage tests at minus 10 ° C, layer separation occurs and an excess of 0.1 wt% is provided in order to provide a margin for corrosion prevention. It can be seen that 0.5% by weight of water added to water causes layer separation even at room temperature, and the addition of water can be effective in corrosion of aluminum due to dry corrosion. That one, to obtain at the water good aluminum corrosion preventing capability even at 120 ° C. is a high temperature, it can be seen that storage stability by water addition is reduced.
On the other hand, the result of adding methanol in place of the water is shown in the formulation name “E10-Me” in FIG. When this methanol is added, it can be seen that the addition of 0.4 wt%, which is almost the same as that of water, shows that the corrosion resistance of aluminum is improved, and good corrosion resistance of aluminum is obtained even at 100 ° C. In addition, it can be seen that the low-temperature stability is improved without causing layer separation as compared with the case where 0.4% by weight of water is added. Furthermore, when 0.5% by weight of methanol was added, good results were obtained even at 120 ° C. in aluminum corrosion resistance, and no layer separation occurred at room temperature and low temperature. It can be seen that it can be improved by the addition of methanol, so that these methanol can be used well as an aluminum corrosion inhibitor.
Moreover, the result at the time of adding propylene glycol as glycols instead of the said water is shown by the compounding name "E10-PG" of FIG. When this propylene glycol is added, it can be seen that the addition of 0.4% by weight, which is almost the same as water, shows that the corrosion resistance of aluminum is improved, and good corrosion resistance of aluminum is obtained even at 100 ° C. In addition, it can be seen that the low-temperature stability is improved without causing layer separation as compared with the case where 0.4% by weight of water is added. Furthermore, when 0.5% by weight of propylene glycol is added, good results can be obtained even at 120 ° C. with respect to the corrosion resistance of aluminum, and no layer separation occurs at room temperature or low temperature. It can be seen that these can be improved by the addition of methanol, so that these propylene glycols can be used favorably as aluminum corrosion inhibitors.
Further, the result of adding diethyl ketone as a ketone instead of the water and the result of adding diethyl ketone together with water are shown in the formulation name “E10-DEK” in FIG. When this diethyl ketone was added alone without water, good aluminum corrosion resistance at 100 ° C. was obtained at 3.5% by weight addition, and 120 ° C. at 4.5% by weight addition. Good corrosion resistance of aluminum can be obtained, and both the above blends have obtained good results in both room temperature stability and low temperature stability, and these diethyl ketones should be used well as aluminum corrosion inhibitors. You can see that
Further, from the result of adding both diethylketone and water shown in “E10-DEK” in FIG. 4, even when the amount of water added is reduced, good aluminum corrosion prevention ability can be obtained. In addition to the fact that the room temperature and low temperature storage stability of the resulting fuel are improved, the addition amount of the same as the case of adding water alone, It can be seen that the addition of ketone further improves the low-temperature stability of the resulting liquid fuel, and it can be seen that these diethyl ketones have the effect of reducing the amount of water added and the effect of improving low-temperature stability.
Further, the result of adding ethyl formate alone as an ester instead of the water and the result of adding ethyl formate together with water are shown in the formulation name “E10-GE” in FIG. When this ethyl formate was added alone without water, good aluminum corrosion resistance at 100 ° C. was obtained at 3.0 wt% addition, and 120 ° C. at 4.0 wt% addition. Good corrosion resistance of aluminum can be obtained, and both the above blends have obtained good results in both room temperature stability and low temperature stability. Use these ethyl formates as aluminum corrosion inhibitors. You can see that
Further, from the result when both ethyl formate and water shown in “E10-GE” in FIG. 4 are added, even when the amount of water added is reduced, good corrosion prevention ability of aluminum can be obtained. In addition to the fact that the room temperature and low temperature storage stability of the resulting fuel are improved, the formic acid is added when the same amount of addition as that of the water alone is added. It can be seen that the addition of ethyl further improves the low-temperature stability of the resulting liquid fuel, and it can be seen that these ethyl formates have the effect of reducing the amount of water added and the effect of improving the low-temperature stability.
Further, the result of adding propionaldehyde as an aldehyde instead of the water alone and the result of adding propionaldehyde together with water are shown in the formulation name “E10-PA” in FIG. When this propionaldehyde was added alone without water, good aluminum corrosion resistance at 100 ° C. was obtained at 1.5 wt% addition, and 120 ° C. at 2.0 wt% addition. Good corrosion resistance of aluminum can be obtained, and both the above blends have obtained good results in both room temperature stability and low temperature stability. Propionaldehyde should be used well as an aluminum corrosion inhibitor. You can see that
Moreover, from the result when both propionaldehyde and water shown in “E10-PA” of FIG. 4 are arranged, even when the amount of water added is reduced, good corrosion prevention ability of aluminum is obtained, and these water Since the addition amount can be reduced, not only is it understood that the storage stability of the resulting fuel at room temperature and low temperature is improved, but when the addition amount similar to the case where the above water alone is added, propionaldehyde is added. It can be seen that the low temperature stability of the obtained liquid fuel is improved by further adding, and that these propionaldehydes have the effect of reducing the amount of water added and the effect of improving the low temperature stability.
In addition, regarding E10-E, which is a basic composition containing ether in E10, water, methanol, propylene glycol, diethyl ketone, ethyl formate, and propionaldehyde are added in the same manner as E10, and the corrosiveness and storage stability of aluminum. FIG. 19 shows the result of the test for the. From the results shown in FIG. 19, it can be seen that even when ether is added, the effect obtained in the case of E10 is obtained in the same manner. Even when these ethers are blended, water, methanol, propylene glycol, It can be seen that diethyl ketone, ethyl formate, and propionaldehyde can be used effectively.
Next, the basic composition of E20 which is Formulation Example 2 is 80% by weight of naphtha and 20% by weight of ethanol, which is a blend in which ethanol as an alcohol is increased from E10 of Formulation Example 1. In this E20, as the alcohol ratio increases, the weight loss at 100 ° C. and 120 ° C. is larger than the aluminum corrosion in the case of E10, as shown in FIG. It can be seen that there is a tendency that the weight loss due to aluminum corrosion tends to increase.
With respect to E20, when water is added to 0.1% by weight at 100 ° C. and water is added to, for example, 0.9% by weight at 120 ° C., weight loss due to aluminum corrosion is eliminated as shown in FIG. On the other hand, it can be seen that the corrosion resistance has been improved, while those having no added water or 0.1% by weight have no problem in storage stability at a low temperature of minus 10 ° C. On the other hand, when water was added to 0.9 wt% at 120 ° C where weight loss due to aluminum corrosion did not occur, layer separation occurred in the low temperature storage test at minus 10 ° C, and 1.1 wt% water was added. Then, it can be seen that layer separation occurs even at room temperature, and it can be seen that the addition of water is effective for aluminum corrosion due to dry corrosion, while the high temperature is increased to 120 ° C. In order to obtain a capacity also prevents good aluminum corrosion have at water, it can be seen that the storage stability by water addition is reduced.
On the other hand, the result of adding methanol instead of the water is shown in the formulation name “E20-Me” in FIG. When this methanol is added, it can be seen that the addition of 0.5% by weight improves the corrosion resistance of aluminum, and good corrosion resistance of aluminum can be obtained even at 120 ° C., and low temperature stability is also achieved. It turns out that it is good, and it turns out that these methanol can be used favorably as an aluminum corrosion inhibitor.
Moreover, the result at the time of adding ethylene glycol as glycols instead of the said water is shown by the compounding name "E20-EG" of FIG. When this ethylene glycol is added, it can be seen that the addition of 0.5% by weight as in the case of methanol improves the corrosion resistance of aluminum, and good corrosion resistance of aluminum is obtained even at 120 ° C. In addition, it can be seen that the low-temperature stability is also good, and that these ethylene glycols can be used well as aluminum corrosion inhibitors.
Further, the result of adding acetone as a ketone instead of the water and the result of adding acetone together with water are shown in the formulation name “E20-Ac” in FIG. When this acetone was added alone without water, good aluminum corrosion resistance at 100 ° C. was obtained at 3.0 wt% addition, and at 120 ° C. at 4.0 wt% addition. Good corrosion resistance of aluminum can be obtained, and both the above blends have obtained good results in both room temperature stability and low temperature stability, and these acetones can be used well as an aluminum corrosion inhibitor. I understand.
Further, from the result of adding both acetone and water shown in “E20-Ac” of FIG. 5, even when the amount of water added is reduced, good corrosion prevention ability of aluminum can be obtained, and these water Since the addition amount can be reduced, not only is it understood that the storage stability of the resulting fuel at room temperature and low temperature is improved, but acetone is added when the same addition amount as in the case of adding the water alone is added. Further, it can be seen that the low temperature stability of the liquid fuel obtained is improved by addition, and that these acetones have the effect of reducing the amount of water added and the effect of improving the low temperature stability.
Further, the result of adding methyl formate alone as an ester instead of the water and the result of adding methyl formate together with water are shown in the formulation name “E20-GM” in FIG. When this methyl formate was added alone without water, good corrosion resistance of aluminum at 100 ° C. was obtained at 6.0 wt% addition, and 120 ° C. at 8.0 wt% addition. Good corrosion resistance of aluminum can be obtained, and both the above blends have obtained good results in both room temperature stability and low temperature stability. Use these methyl formates as aluminum corrosion inhibitors. You can see that
Further, from the result of adding both methyl formate and water shown in “E20-GM” in FIG. 5, even when the amount of water added is reduced, good corrosion prevention ability of aluminum can be obtained. In addition to the fact that the room temperature and low temperature storage stability of the resulting fuel are improved, the formic acid is added when the same amount of addition as that of the water alone is added. It can be seen that the addition of methyl further improves the low-temperature stability of the resulting liquid fuel, and that these methyl formates have the effect of reducing the amount of water added and the effect of improving low-temperature stability.
Further, the result of adding butyraldehyde alone as an aldehyde instead of the water and the result of adding butyraldehyde together with water are shown in the formulation name “E20-BA” in FIG. When this butyraldehyde was added alone without water, good aluminum corrosion resistance at 100 ° C. was obtained at 2.0 wt% addition, and 120 ° C. at 2.5 wt% addition. Good corrosion resistance of aluminum can be obtained, and in both the above formulations, good results have been obtained in both room temperature stability and low temperature stability, and these butyraldehydes should be used well as aluminum corrosion inhibitors. You can see that
Further, from the result when both butyraldehyde and water shown in “E20-BA” of FIG. 5 are added, even when the amount of water added is reduced, good aluminum corrosion prevention ability can be obtained. In addition to the fact that the storage stability of the obtained fuel is improved at room temperature and low temperature, the addition of the same amount of water as that in the case of adding the water alone, It can be seen that the addition of aldehyde further improves the low-temperature stability of the resulting liquid fuel, and these butyraldehydes have the effect of reducing the amount of water added and the effect of improving low-temperature stability.
Regarding E20-E, which is a basic composition containing ether in E20, corrosiveness and storage stability of aluminum by adding water, methanol, ethylene glycol, acetone, methyl formate and butyraldehyde as in E20. The result of carrying out the test is shown in FIG. From the results shown in FIG. 20, it can be seen that even when ether is added, the effect obtained in the case of E20 is obtained in the same manner. Even when these ethers are blended, water, methanol, ethylene glycol, It can be seen that acetone, methyl formate, and butyraldehyde can be used effectively.
Next, the basic composition of E50, which is Formulation Example 3, is 50% by weight of naphtha and 50% by weight of ethanol, and is a blend in which ethanol as an alcohol is further increased than E20 of Formulation Example 2. In this E50, as the alcohol ratio increases, the weight loss at 100 ° C. and 120 ° C. is larger than the aluminum corrosion in the case of E20, as shown in FIG. It can be seen that there is a tendency that the weight loss due to aluminum corrosion tends to increase.
With respect to E50, when water is added up to 0.1 wt% at 100 ° C. and water is added up to 3.4 wt% at 120 ° C., for example, the weight loss due to aluminum corrosion is eliminated as shown in FIG. On the other hand, it can be seen that the corrosion resistance has been improved, while those having no added water or 0.1% by weight have no problem in storage stability at a low temperature of minus 10 ° C. On the other hand, when water was added up to 3.4% by weight where no weight loss due to aluminum corrosion occurred at 120 ° C., layer separation occurred in the low temperature storage test at minus 10 ° C., and 3.6% by weight of water was added. Then, it can be seen that layer separation occurs even at room temperature, and it can be seen that the addition of water is effective for aluminum corrosion due to dry corrosion, while the high temperature is increased to 120 ° C. In order to obtain a capacity also prevents good aluminum corrosion have at water, it can be seen that the storage stability by water addition is reduced.
On the other hand, the result of adding methanol in place of the water is shown in the formulation name “E50-Me” in FIG. When this methanol was added, it was found that the corrosion resistance of aluminum at 120 ° C. was improved at 100 ° C. when added at 0.8 wt% and 120 ° C. when added at 1.0 wt%, and the low temperature stability was also improved. It turns out that it is good, and it turns out that these methanol can be used favorably as an aluminum corrosion inhibitor.
Moreover, the result at the time of adding ethylene glycol as glycols instead of the said water is shown by the compounding name "E50-EG" of FIG. When this ethylene glycol was added, it was found that the corrosion resistance of aluminum at 100 ° C. was improved by the addition of 0.7% by weight, which was almost the same as that of methanol. It can be seen that the corrosion resistance of aluminum at 120 ° C. is improved and that the low-temperature stability is also good, and it can be seen that these ethylene glycols can be used favorably as an aluminum corrosion inhibitor.
Further, the result of adding methyl ethyl ketone as the ketone instead of the water and the result of adding it together with water are shown in the formulation name “E50-MEK” in FIG. When this methyl ethyl ketone was added alone without water, good corrosion resistance of aluminum at 100 ° C. was obtained at 4.0 wt% addition, and good at 120 ° C. at 6.0 wt% addition. In addition to the corrosion resistance of aluminum, good results have been obtained for both room temperature stability and low temperature stability in both of the above blends, and these methyl ethyl ketones can be used well as aluminum corrosion inhibitors. I understand.
Moreover, from the result when both methyl ethyl ketone and water shown in “E50-MEK” in FIG. 6 are added, even when the amount of water added is reduced, good corrosion prevention ability of aluminum can be obtained. Since the addition amount can be reduced, not only is it understood that the storage stability of the resulting fuel at room temperature and low temperature is improved, but when the addition amount similar to the case where the above water alone is added, these methyl ethyl ketones are added. It can be seen that the low temperature stability of the obtained liquid fuel is improved by further adding, and that methyl ethyl ketone has an effect of reducing the amount of water added and an effect of improving the low temperature stability.
Moreover, the result of adding ethyl formate alone as an ester in place of the water and the result of adding ethyl formate together with water are shown in the formulation name “E50-GE” in FIG. When this ethyl formate was added alone without water, good corrosion resistance of aluminum at 100 ° C. was obtained at 6.0 wt% addition, and 120 ° C. at 10.0 wt% addition. Good corrosion resistance of aluminum can be obtained, and both the above blends have obtained good results in both room temperature stability and low temperature stability. Use these ethyl formates as aluminum corrosion inhibitors. You can see that
Further, from the result of adding both ethyl formate and water shown in “E50-GE” in FIG. 6, even when the amount of water added is reduced, good corrosion prevention ability of aluminum can be obtained. In addition to the fact that the room temperature and low temperature storage stability of the resulting fuel are improved, the formic acid is added when the same amount of addition as that of the water alone is added. It can be seen that the addition of ethyl further improves the low-temperature stability of the resulting liquid fuel, and it can be seen that these ethyl formates have the effect of reducing the amount of water added and the effect of improving the low-temperature stability.
Moreover, the result of adding acetaldehyde alone as an aldehyde instead of the water and the result of adding acetaldehyde together with water are shown in the formulation name “E50-AA” in FIG. When this acetaldehyde was added alone without water, good aluminum corrosion resistance at 100 ° C. was obtained at 3.0 wt% addition, and at 120 ° C. at 4.0 wt% addition. Good corrosion resistance of aluminum can be obtained, and both the above blends have obtained good results in both room temperature stability and low temperature stability, and these acetaldehyde can be used well as an aluminum corrosion inhibitor. I understand.
Moreover, from the result when both acetaldehyde and water shown in “E50-AA” in FIG. 6 are added, even if the amount of water added is reduced, good corrosion prevention ability of aluminum is obtained, and these water Since the addition amount can be reduced, it can be seen that the room temperature and low-temperature storage stability of the resulting fuel are improved, and acetaldehyde is added when the same addition amount as in the case of adding water alone is added. Further, it can be seen that the low temperature stability of the liquid fuel obtained is improved by addition, and that these acetaldehydes have the effect of reducing the amount of water added and the effect of improving the low temperature stability.
In addition, regarding “E50-E”, which is a basic composition containing ether in E50, water, methanol, ethylene glycol, methyl ethyl ketone, ethyl formate, and acetaldehyde are added to E50 in the same manner as E50, and the corrosivity and storage stability of aluminum The results of the test are shown in FIG. From the results shown in FIG. 21, it can be seen that even when ether is added, the effect obtained in the case of E50 is obtained in the same manner. Even when these ethers are blended, water, methanol, ethylene glycol, It can be seen that methyl ethyl ketone, ethyl formate, and acetaldehyde can be used effectively.
Next, the basic composition of IN40, which is Formulation Example 4, is naphtha 60% by weight, isopropyl alcohol 20% by weight, and n-butanol 20% by weight, and the type of alcohol is isopropyl alcohol and n-butanol, which have more carbon atoms than ethanol. It is the combination which is two types. Also in this IN40, as shown in FIG. 7, it can be seen that there is a weight reduction due to aluminum corrosion due to dry corrosion similar to E50.
With respect to this IN40, when water is added up to 0.1% by weight at 90 ° C. and water is added up to 3.6% by weight at 120 ° C., for example, the weight loss due to aluminum corrosion is eliminated as shown in FIG. On the other hand, it can be seen that the corrosion resistance has been improved, while those having no added water or 0.1% by weight have no problem in storage stability at a low temperature of minus 10 ° C. On the other hand, in the case of adding 3.6 wt% water that does not cause weight loss due to aluminum corrosion at 120 ° C., in the low temperature storage test at minus 10 ° C., layer separation occurs and 3.8 wt% water addition It can be seen that layer separation occurs even at room temperature, and it can be seen that the addition of water is effective for aluminum corrosion due to dry corrosion. Such an aluminum corrosion ability in the case of obtaining at water, it can be seen that the storage stability by water addition is reduced.
On the other hand, the result of adding methanol instead of the water is shown in the formulation name “IN40-Me” in FIG. When this methanol is added, good corrosion resistance of aluminum is obtained even at 100 ° C. when 0.8% by weight is added, and low temperature stability is also good. The addition of 1.7% by weight gives good results in the corrosion resistance of aluminum at 120 ° C., and does not cause layer separation at room temperature and low temperature. It can be seen that the methanol can be improved as an aluminum corrosion inhibitor.
In addition, from the result of adding both methanol and water shown in “IN40-Me” in FIG. 7, even when the amount of water added is reduced, good corrosion prevention ability of aluminum can be obtained, and these water Since the addition amount can be reduced, not only is it understood that the storage stability of the resulting fuel at room temperature and low temperature is improved, but these methanols are added when the same addition amount as that when the water alone is added. It can be seen that the low temperature stability of the resulting liquid fuel is improved by further adding, and that these methanols have the effect of reducing the amount of water added and the effect of improving the low temperature stability.
Moreover, the result when ethylene glycol is added as a glycol instead of the water is shown in the formulation name “IN40-EG” in FIG. When this ethylene glycol is added, it can be seen that the addition of 1.5% by weight improves the corrosion resistance of aluminum, and good aluminum corrosion resistance is obtained even at 100 ° C. Also shows good results. In addition, the addition of 3.0% by weight gives good results in the corrosion resistance of aluminum at 120 ° C., and does not cause layer separation at room temperature and low temperature. It can be seen that it can be improved by the addition of glycol, so that these ethylene glycols can be used well as aluminum corrosion inhibitors.
Further, from the result when both ethylene glycol and water shown in “IN40-EG” of FIG. 7 are added, even when the amount of water added is reduced, good aluminum corrosion prevention ability can be obtained. It can be seen that the room temperature and low-temperature storage stability of the resulting fuel are improved, and that these ethylene glycols have the effect of reducing the amount of water added.
Further, the result of adding acetone as a ketone instead of the water and the result of adding acetone together with water are shown in the formulation name “IN40-Ac” in FIG. When this acetone is added alone without water, good corrosion resistance of aluminum at 100 ° C. and 120 ° C. can be obtained at 0.2% by weight, and both room temperature stability and low temperature stability can be obtained. Good results have been obtained and it can be seen that these acetones can be used well as aluminum corrosion inhibitors.
Moreover, from the result when both acetone and water shown in “IN40-Ac” of FIG. 7 are added, even if the amount of water added is reduced, good corrosion prevention ability of aluminum can be obtained. Since the addition amount can be reduced, it can be seen that the storage stability of the resulting fuel at room temperature and low temperature is improved, and these acetones are added when the same addition amount as in the case of adding water alone is added. It can be seen that the low temperature stability of the obtained liquid fuel is improved by further adding, and that these acetones have the effect of reducing the amount of water added and the effect of improving the low temperature stability.
Moreover, the result of adding methyl formate alone as an ester in place of the water and the result of adding methyl formate together with water are shown in the formulation name “IN40-GM” in FIG. When this methyl formate was added alone without water, good aluminum corrosion resistance at 100 ° C. was obtained at 1.5 wt% addition, and 120 ° C. at 3.0 wt% addition. Good corrosion resistance of aluminum can be obtained, and both the above blends have obtained good results in both room temperature stability and low temperature stability. Use these methyl formates as aluminum corrosion inhibitors. You can see that
Further, from the result of adding both methyl formate and water shown in “IN40-GM” in FIG. 7, even when the amount of water added is reduced, good corrosion prevention ability of aluminum can be obtained. In addition to the fact that the room temperature and low temperature storage stability of the resulting fuel are improved, the formic acid is added when the same amount of addition as that of the water alone is added. It can be seen that the addition of methyl further improves the low-temperature stability of the resulting liquid fuel, and that these methyl formates have the effect of reducing the amount of water added and the effect of improving low-temperature stability.
Further, the result of adding butyraldehyde alone as an aldehyde instead of the water and the result of adding butyraldehyde together with water are shown in the formulation name “IN40-BA” in FIG. When this butyraldehyde was added alone without water, good aluminum corrosion resistance at 100 ° C. was obtained at 0.3 wt% addition, and 120 ° C. at 0.5 wt% addition. Good corrosion resistance of aluminum can be obtained, and in both the above formulations, good results have been obtained in both room temperature stability and low temperature stability, and these butyraldehydes should be used well as aluminum corrosion inhibitors. You can see that
Further, from the result when both butyraldehyde and water shown in “IN40-BA” in FIG. 7 are added, even when the amount of water added is reduced, good corrosion prevention ability of aluminum can be obtained, and these water It can be seen that the room temperature and low temperature storage stability of the resulting fuel are improved, and that these acetaldehydes have the effect of reducing the amount of water added.
In addition, regarding IN40-E, which is a basic composition containing ether in IN40, as with IN40, water, methanol, ethylene glycol, acetone, methyl formate, butyraldehyde are added to the corrosiveness and storage stability of aluminum. The results of the test are shown in FIG. From the results shown in FIG. 22, it can be seen that even when ether is added, the effect obtained in the case of IN40 is almost the same except for low-temperature stability in ethylene glycol and butyraldehyde. It can be seen that water, methanol, ethylene glycol, acetone, methyl formate, and butyraldehyde can be used effectively even when these ethers are blended.
Next, the basic composition of IN15, which is Formulation Example 5, is 85% by weight of naphtha, 10% by weight of isopropyl alcohol, and 5% by weight of n-butanol. The ratio of alcohol is less than that of “IN40”.
With respect to this IN15, when water is added up to 0.1% by weight at 90 ° C. and water is added up to 0.6% by weight at 120 ° C., weight loss due to aluminum corrosion is eliminated as shown in FIG. On the other hand, it can be seen that the corrosion resistance is improved, while those having no added water or 0.1% by weight of water have no problem in storage stability at a low temperature of minus 10 ° C. In the case of adding water up to 0.6 wt% at 120 ° C. where weight loss due to aluminum corrosion does not occur, layer separation occurs in the low temperature storage stability test at −10 ° C., and 0.8 wt% water is added. It can be seen that layer separation occurs even at room temperature, and the addition of water is effective for aluminum corrosion due to dry corrosion, but it is good even at a high temperature of 120 ° C. The aluminum corrosion ability in the case of obtaining at water, it can be seen that the storage stability by water addition is reduced.
On the other hand, the result of adding methanol instead of the water is shown in the formulation name “IN15-Me” in FIG. When this methanol is added, good aluminum corrosion resistance is obtained even at 100 ° C. when 0.5% by weight is added, and low temperature stability is also good. In addition, the addition of 1.5% by weight gives good results even in the corrosion resistance of aluminum at 120 ° C., and does not cause layer separation at room temperature and low temperature. It can be seen that the methanol can be improved as an aluminum corrosion inhibitor.
Further, from the result of adding both methanol and water shown in “IN15-Me” of FIG. 8, even if the amount of water added is reduced, a good aluminum corrosion prevention ability can be obtained, and these water Since the addition amount can be reduced, not only is it understood that the storage stability of the resulting fuel at room temperature and low temperature is improved, but these methanols are added when the same addition amount as that when the water alone is added. It can be seen that the low temperature stability of the resulting liquid fuel is improved by further adding, and that these methanols have the effect of reducing the amount of water added and the effect of improving the low temperature stability.
Further, the result when propylene glycol is added as a glycol instead of the water is shown in the formulation name “IN15-PG” in FIG. When this propylene glycol is added, it can be seen that the addition of 2.0% by weight improves the corrosion resistance of aluminum, and good corrosion resistance of aluminum can be obtained even at 100 ° C. Also shows good results. The addition of 4.0% by weight gives good results in the corrosion resistance of aluminum at 120 ° C., and does not cause layer separation at room temperature and low temperature. It can be seen that it can be improved by the addition of glycol, so that these propylene glycols can be used favorably as aluminum corrosion inhibitors.
Further, from the result when both propylene glycol and water shown in “IN15-PG” in FIG. 8 are added, even if the amount of water added is reduced, good corrosion prevention ability of aluminum can be obtained, and these water It can be seen that the room temperature and low temperature storage stability of the resulting fuel are improved, and it can be seen that these propylene glycols have the effect of reducing the amount of water added.
Further, the result of adding methyl isobutyl ketone as a ketone instead of the water and the result of adding methyl isobutyl ketone together with water are shown in the formulation name “IN15-MBK” in FIG. When this methyl isobutyl ketone is added alone without water, good aluminum corrosion resistance at 100 ° C. is obtained at 0.3 wt% addition, and at 120 ° C. at 0.5 wt% addition. Good corrosion resistance of aluminum is obtained, and both formulations have good results in both room temperature stability and low temperature stability, and these methyl isobutyl ketones can be used well as aluminum corrosion inhibitors. I understand.
Further, from the result when both methyl isobutyl ketone and water shown in “IN15-MBK” in FIG. 8 are added, even when the amount of water added is reduced, good corrosion prevention ability of aluminum is obtained. Since the amount of water added can be reduced, not only is it understood that the room temperature and low temperature storage stability of the obtained fuel is improved, but when the same amount of addition as the case of adding water alone is added, It can be seen that the addition of these methyl isobutyl ketones improves the low-temperature stability of the resulting liquid fuel, and these methyl isobutyl ketones have the effect of reducing the amount of water added and the effect of improving low-temperature stability. I understand that.
Further, the result of adding ethyl formate alone as an ester in place of the water and the result of adding ethyl formate together with water are shown in the formulation name “IN15-GE” in FIG. When this ethyl formate was added alone without water, good aluminum corrosion resistance at 100 ° C. was obtained at 1.0 wt% addition, and 120 ° C. at 5.0 wt% addition. Good corrosion resistance of aluminum can be obtained, and both the above blends have obtained good results in both room temperature stability and low temperature stability. Use these ethyl formates as aluminum corrosion inhibitors. You can see that
Further, from the result of adding both ethyl formate and water shown in “IN15-GE” in FIG. 8, even when the amount of water added is reduced, good corrosion prevention ability of aluminum can be obtained. In addition to the fact that the room temperature and low temperature storage stability of the resulting fuel are improved, the formic acid is added when the same amount of addition as that of the water alone is added. It can be seen that the addition of ethyl further improves the low-temperature stability of the resulting liquid fuel, and it can be seen that these ethyl formates have the effect of reducing the amount of water added and the effect of improving the low-temperature stability.
Moreover, the result of adding propionaldehyde alone as an aldehyde instead of the water and the result of adding propionaldehyde together with water are shown in the formulation name “IN15-PA” in FIG. When this propionaldehyde was added alone without water, good aluminum corrosion resistance at 100 ° C. was obtained at 0.2 wt% addition, and 120 ° C. at 0.4 wt% addition. Good corrosion resistance of aluminum can be obtained, and both the above blends have obtained good results in both room temperature stability and low temperature stability. Propionaldehyde should be used well as an aluminum corrosion inhibitor. You can see that
Further, from the result of adding both propionaldehyde and water shown in “IN15-PA” in FIG. 8, even when the amount of water added is reduced, good aluminum corrosion prevention ability is obtained, and these water It can be seen that the room temperature and low-temperature storage stability of the resulting fuel are improved, and it can be seen that these propionaldehydes have the effect of reducing the amount of water added.
In addition, regarding IN15-E, which is a basic composition containing ether in IN15, water, methanol, propion glycol, methyl isobutyl ketone, ethyl formate and propionaldehyde are added to IN15 in the same manner as IN15 to prevent the corrosion and storage stability of aluminum. The result of having performed the test about sex is shown in FIG. From the results shown in FIG. 23, it can be seen that the effects obtained in the case of IN15 were obtained in the same manner even when ether was added. Even when these ethers were blended, water, methanol, propion glycol It can be seen that methyl isobutyl ketone, ethyl formate, and propionaldehyde can be used effectively.
Next, the basic composition of IN75, which is Formulation Example 6, is a formulation in which naphtha is 25% by weight, isopropyl alcohol is 35% by weight, and n-butanol is 40% by weight, and the alcohol ratio is higher than that of “IN40”. Also in this IN75, as shown in FIG. 9, it can be seen that there is a weight reduction due to aluminum corrosion due to dry corrosion similar to the above IN15.
With respect to this IN75, at 90 ° C., even when 0.1% by weight of water is added, the total amount of alcohol contained in the fuel is as large as about 75% by weight, so that good corrosion resistance of aluminum is obtained. However, when 0.2% by weight of water, which exceeds 0.15% by weight obtained by multiplying the total amount of the alcohol by 0.002, is added, it can be seen that good corrosion resistance of aluminum can be obtained. . In addition, at 120 ° C., it can be seen that if water is added up to 0.8% by weight, good corrosion resistance of aluminum can be obtained at 120 ° C., and the addition of water is effective for aluminum corrosion due to dry corrosion. I understand.
On the other hand, the result of adding methanol instead of the water is shown in the formulation name “IN75-Me” in FIG. When this methanol is added, good corrosion resistance of aluminum can be obtained even at 100 ° C. when 1.0% by weight is added, and the low temperature stability is also good. The addition of 2.0% by weight gives good results in the corrosion resistance of aluminum at 120 ° C., and does not cause layer separation at room temperature and low temperature. It can be seen that the methanol can be improved as an aluminum corrosion inhibitor.
Further, from the result when both methanol and water shown in “IN75-Me” in FIG. 9 are added, by mixing methanol and water, good corrosion prevention ability of aluminum can be obtained with a smaller amount of methanol. In addition, it can be seen that good room temperature and low temperature storage stability can be obtained, and that these waters have the effect of reducing the amount of methanol added.
Further, the result when ethylene glycol is added as a glycol instead of the water is shown in the formulation name “IN75-EG” in FIG. When this ethylene glycol is added, it can be seen that the addition of 3.0% by weight improves the corrosion resistance of aluminum, and good corrosion resistance of aluminum can be obtained even at 100 ° C. Also shows good results. In addition, the addition of 6.0% by weight gives good results even in the corrosion resistance of aluminum at 120 ° C., and does not cause layer separation at room temperature and low temperature. It can be seen that it can be improved by the addition of glycoll, so that these ethylene glycols can be used favorably as aluminum corrosion inhibitors.
Moreover, from the result when both ethylene glycol and water shown in “IN75-EG” in FIG. 9 are added, by mixing ethylene glycol and water, good corrosion prevention of aluminum with a smaller amount of ethylene glycol. It can be seen that, at the same time, good room temperature and low-temperature storage stability can be obtained, and that these waters have the effect of reducing the amount of ethylene glycol added.
Further, the result of adding methyl n-propyl ketone as a ketone instead of the water and the result of adding methyl n-propyl ketone together with water are shown in the formulation name “IN75-MPK” in FIG. When this methyl n-propyl ketone is added alone without water, good corrosion resistance of aluminum at 100 ° C. and 120 ° C. can be obtained at 0.2% by weight addition, and both formulations are stable at room temperature. Also, good results were obtained with low temperature stability, and it can be seen that these methyl n-propyl ketones can be used well as aluminum corrosion inhibitors.
Further, from the result of adding both methyl n-propyl ketone and water shown in “IN75-MPK” in FIG. 9, by mixing methyl n-propyl ketone and water, the amount of methyl n-propyl ketone can be reduced. It can be seen that good corrosion prevention ability of aluminum can be obtained, and that excellent storage stability at room temperature and low temperature can be obtained, and that these waters have an effect of reducing the amount of methyl n-propyl ketone added.
Moreover, the result of adding ethyl formate alone as an ester instead of the water and the result of adding ethyl formate together with water are shown in the formulation name “IN75-GE” in FIG. When this ethyl formate was added alone without water, good corrosion resistance of aluminum at 100 ° C. was obtained at 2.0 wt% addition, and 120 ° C. at 3.5 wt% addition. Good corrosion resistance of aluminum can be obtained, and both the above blends have obtained good results in both room temperature stability and low temperature stability. Use these ethyl formates as aluminum corrosion inhibitors. You can see that
Further, from the result of adding both ethyl formate and water shown in “IN75-GE” in FIG. 9, by mixing ethyl formate and water, it is possible to prevent corrosion of aluminum with a smaller amount of ethyl formate. In addition, it can be seen that good room temperature and low-temperature storage stability can be obtained, and that these waters have the effect of reducing the amount of ethyl formate added.
Further, the result of adding acetaldehyde alone as an aldehyde instead of the water and the result of adding acetaldehyde together with water are shown in the formulation name “IN75-AA” in FIG. When this acetaldehyde was added alone without water, good aluminum corrosion resistance at 100 ° C. was obtained at 0.3 wt% addition, and at 120 ° C. at 0.6 wt% addition. Good corrosion resistance of aluminum can be obtained, and both the above blends have obtained good results in both room temperature stability and low temperature stability, and these acetaldehyde can be used well as an aluminum corrosion inhibitor. I understand.
Further, from the result of adding both acetaldehyde and water shown in “IN75-AA” in FIG. 9, by mixing acetaldehyde and water, good corrosion prevention ability of aluminum can be obtained with a smaller amount of acetaldehyde. In addition, it can be seen that good room temperature and low-temperature storage stability can be obtained, and that these waters have the effect of reducing the amount of acetaldehyde added.
In addition, regarding IN75-E, which is a basic composition containing ether in IN75, as in IN75, water, methanol, ethylene glycol, methyl n-propyl ketone, ethyl formate, and acetaldehyde are added to corrode aluminum and provide stable storage. The result of having conducted the test about property is shown in FIG. From the results shown in FIG. 24, it can be seen that the effects obtained in the case of IN75 were obtained in the same manner even when ether was added. Even when these ethers were blended, water, methanol, ethylene glycol It can be seen that methyl n-propyl ketone, ethyl formate, and acetaldehyde can be used effectively.
Next, the basic composition of EIB40, which is Formulation Example 7, is 60% by weight of naphtha, 20% by weight of ethanol, and 20% by weight of isobutyl alcohol. The alcohol used is different from the formulation of IN40. Also in this EIB40, as shown in FIG. 10, it can be seen that there is a weight reduction due to aluminum corrosion due to dry corrosion similar to E50 and IN40.
When water is added to this EIB40 up to 0.1% by weight at 90 ° C. and water is added to, for example, 4.8% by weight at 120 ° C., weight loss due to aluminum corrosion is eliminated as shown in FIG. On the other hand, it can be seen that the corrosion resistance has been improved, while those having no added water or 0.1% by weight have no problem in storage stability at a low temperature of minus 10 ° C. On the other hand, in the case of adding water up to 4.8% by weight where no weight loss due to aluminum corrosion occurs at 120 ° C., layer separation occurs in the low temperature storage test at minus 10 ° C. and 5.1% by weight of water is added. Therefore, it can be seen that layer separation occurs even at room temperature, and that the addition of water is effective for aluminum corrosion due to dry corrosion, while at a high temperature of 120 ° C. Good aluminum corrosion ability even in the case of obtaining at water, it can be seen that the storage stability by water addition is reduced.
On the other hand, the result of adding methanol instead of the water is shown in the formulation name “EIB40-Me” in FIG. When this methanol is added, good aluminum corrosion resistance is obtained even at 100 ° C. when 1.5% by weight is added, and low temperature stability is also good. The addition of 2.0% by weight gives good results in the corrosion resistance of aluminum at 120 ° C., and does not cause layer separation at room temperature and low temperature. It can be seen that the methanol can be improved as an aluminum corrosion inhibitor.
Further, from the result when both methanol and water shown in “EIB40-Me” in FIG. 10 are added, even when the amount of water added is reduced, good corrosion prevention ability of aluminum can be obtained, and these water Since the addition amount can be reduced, it can be seen that the room temperature and low-temperature storage stability of the obtained fuel are improved, and it can be seen that these methanols have the effect of reducing the addition amount of water.
Moreover, the result at the time of adding ethylene glycol as glycols instead of the said water is shown by the compounding name "EIB40-EG" of FIG. When this ethylene glycol is added, it can be seen that the addition of 1.0% by weight improves the corrosion resistance of aluminum, and good corrosion resistance of aluminum can be obtained even at 100 ° C. Also shows good results. The addition of 2.0% by weight gives good results in the corrosion resistance of aluminum at 120 ° C., and does not cause layer separation at room temperature and low temperature. It can be seen that it can be improved by the addition of glycol, so that these ethylene glycols can be used well as aluminum corrosion inhibitors.
Further, from the result of adding both ethylene glycol and water shown in “EIB40-EG” in FIG. 10, even when the amount of water added is reduced, good aluminum corrosion prevention ability can be obtained, and these water It can be seen that the room temperature and low-temperature storage stability of the resulting fuel are improved, and that these ethylene glycols have the effect of reducing the amount of water added.
Further, the result of adding acetone as a ketone instead of the water and the result of adding acetone together with water are shown in the formulation name “EIB40-Ac” in FIG. When this acetone was added alone without water, it was found that the addition of 0.2% by weight improved the corrosion resistance of aluminum, and good aluminum corrosion resistance was obtained even at 100 ° C. In addition, the low temperature stability shows good results. In addition, the addition of 3.0% by weight gives good results also in the corrosion resistance of aluminum at 120 ° C., and does not cause layer separation at room temperature and low temperature, both room temperature stability and low temperature stability. Good results have been obtained and it can be seen that these acetones can be used well as aluminum corrosion inhibitors.
Further, from the result of adding both acetone and water shown in “EIB40-Ac” in FIG. 10, even if the amount of water added is reduced, good corrosion prevention ability of aluminum can be obtained, and these water Since the addition amount can be reduced, it can be seen that the storage stability of the resulting fuel at room temperature and low temperature is improved, and these acetones are added when the same addition amount as in the case of adding water alone is added. It can be seen that the low temperature stability of the obtained liquid fuel is improved by further adding, and that these acetones have the effect of reducing the amount of water added and the effect of improving the low temperature stability.
Moreover, the result of adding methyl formate alone as an ester instead of the water and the result of adding methyl formate together with water are shown in the formulation name “EIB40-GM” in FIG. When this methyl formate was added alone without water, good aluminum corrosion resistance at 100 ° C. was obtained at 2.5 wt% addition, and 120 ° C. at 5.0 wt% addition. Good corrosion resistance of aluminum can be obtained, and both the above blends have obtained good results in both room temperature stability and low temperature stability. Use these methyl formates as aluminum corrosion inhibitors. You can see that
Further, from the result of adding both methyl formate and water shown in “EIB40-GM” in FIG. 10, even when the amount of water added is reduced, good corrosion prevention ability of aluminum can be obtained. In addition to the fact that the room temperature and low temperature storage stability of the resulting fuel are improved, the formic acid is added when the same amount of addition as that of the water alone is added. It can be seen that the addition of methyl further improves the low-temperature stability of the resulting liquid fuel, and that these methyl formates have the effect of reducing the amount of water added and the effect of improving low-temperature stability.
Further, the result of adding butyraldehyde alone as an aldehyde instead of the water and the result of adding butyraldehyde together with water are shown in the formulation name “EIB40-BA” in FIG. When this butyraldehyde was added alone without water, good corrosion resistance of aluminum at 100 ° C. was obtained at 0.6 wt% addition, and 120 ° C. at 1.0 wt% addition. Good corrosion resistance of aluminum can be obtained, and in both the above formulations, good results have been obtained in both room temperature stability and low temperature stability, and these butyraldehydes should be used well as aluminum corrosion inhibitors. You can see that
Further, from the result of adding both butyraldehyde and water shown in “EIB40-BA” in FIG. 10, even when the amount of water added is reduced, good corrosion prevention ability of aluminum can be obtained, and these water In addition to the fact that the storage stability of the obtained fuel is improved at room temperature and low temperature, the addition of the same amount of water as that in the case of adding the water alone, It can be seen that the addition of aldehyde further improves the low-temperature stability of the resulting liquid fuel, and these butyraldehydes have the effect of reducing the amount of water added and the effect of improving low-temperature stability.
In addition, regarding EIB40-E, which is a basic composition containing ether in EIB40, water, methanol, ethylene glycol, acetone, methyl formate and butyraldehyde are added to the corrosiveness and storage stability of aluminum in the same manner as EIB40. The results of the test are shown in FIG. From the results shown in FIG. 25, it can be seen that even when ether is added, the effect obtained in the case of EIB40 is obtained in the same manner. Even when these ethers are blended, water, methanol, ethylene glycol, It can be seen that acetone, methyl formate, and butyraldehyde can be used effectively.
Next, the basic composition of EIB15 as Formulation Example 8 is naphtha 85% by weight, ethanol 5% by weight, isobutyl alcohol 10% by weight, and the alcohol used is different from the formulation of IN15. Also in this EIB15, as shown in FIG. 11, it turns out that there exists a weight reduction by the aluminum corrosion by the dry corrosion similar to said E10 and IN15.
When water is added to 0.1% by weight at 90 ° C. and 0.6% by weight at 120 ° C. with respect to EIB15, weight loss due to aluminum corrosion is eliminated as shown in FIG. On the other hand, it can be seen that the corrosion resistance is improved, while those having no added water or 0.1% by weight of water have no problem in storage stability at a low temperature of minus 10 ° C. When water is added up to 0.6% by weight at 120 ° C., where weight loss due to aluminum corrosion does not occur, layer separation occurs in the storage stability test at −10 ° C. and 0.8% by weight of water is added. It can be seen that layer separation occurs even at room temperature, and that the addition of water is effective for aluminum corrosion due to dry corrosion, while also at a high temperature of 120 ° C. A good aluminum corrosion ability in the case of obtaining at water, it can be seen that the storage stability by water addition is reduced.
On the other hand, the result of adding methanol instead of the water is shown in the formulation name “EIB15-Me” in FIG. When this methanol is added, it can be seen that the addition of 1.0% by weight improves the corrosion resistance of aluminum, and good corrosion resistance of aluminum is obtained even at 100 ° C., and stability at low temperature Also shows good results. In addition, the addition of 1.5% by weight gives good results even in the corrosion resistance of aluminum at 120 ° C., and does not cause layer separation at room temperature and low temperature. It can be seen that the methanol can be improved as an aluminum corrosion inhibitor.
Further, from the result of adding both methanol and water shown in “EIB15-Me” in FIG. 11, even when the amount of water added is reduced, good corrosion prevention ability of aluminum can be obtained, and these water Since the addition amount can be reduced, it can be seen that the storage stability of the resulting fuel at room temperature and low temperature is improved, and it can be seen that these methanols have an effect of reducing the addition amount of water. It can be seen that the low temperature stability of the resulting liquid fuel has been improved by further adding these methanol when the same amount of addition as in the case of adding is added. It can be seen that there is a reduction effect and an improvement effect of low temperature stability.
Moreover, the result at the time of adding propylene glycol as glycols instead of the said water is shown by the compounding name "EIB15-PG" of FIG. When this propylene glycol is added, it can be seen that the addition of 1.5% by weight improves the corrosion resistance of aluminum, and good corrosion resistance of aluminum can be obtained even at 100 ° C. Also shows good results. In addition, the addition of 3.0% by weight gives good results in the corrosion resistance of aluminum at 120 ° C., and does not cause layer separation at room temperature and low temperature. It can be seen that it can be improved by the addition of glycol, so that these propylene glycols can be used favorably as aluminum corrosion inhibitors.
Further, from the result when both propylene glycol and water shown in “EIB15-PG” in FIG. 11 are added, even if the amount of water added is reduced, good corrosion prevention ability of aluminum can be obtained, and these water It can be seen that the room temperature and low temperature storage stability of the resulting fuel are improved, and it can be seen that these propylene glycols have the effect of reducing the amount of water added.
Further, the result of adding diethyl ketone as a ketone instead of the water and the result of adding diethyl ketone together with water are shown in the formulation name “EIB15-DEK” in FIG. When this diethyl ketone was added alone without water, it was found that the addition of 1.0% by weight improved the corrosion resistance of aluminum, and good aluminum corrosion resistance even at 100 ° C. As well as being obtained, the low-temperature stability shows good results. The addition of 1.5% by weight gives good results in the corrosion resistance of aluminum at 120 ° C., and does not cause layer separation at room temperature and low temperature. Good results have been obtained and it can be seen that these diethyl ketones can be used well as aluminum corrosion inhibitors.
Further, from the result of adding both diethylketone and water shown in “EIB15-DEK” in FIG. 11, even when the amount of water added is reduced, good corrosion prevention ability of aluminum can be obtained, and these water In addition to the fact that the room temperature and low temperature storage stability of the resulting fuel are improved, the addition of the same amount of water as those when the water alone is added It can be seen that the addition of diethyl ketone further improves the low-temperature stability of the resulting liquid fuel, and that these diethyl ketones have the effect of reducing the amount of water added and the effect of improving low-temperature stability. .
Further, the result of adding methyl acetate alone as an ester instead of the water and the result of adding methyl acetate together with water are shown in the formulation name “EIB15-SM” in FIG. When this methyl acetate was added alone without water, good aluminum corrosion resistance at 100 ° C. was obtained at 2.0 wt% addition, and 120 ° C. at 3.0 wt% addition. Good corrosion resistance of aluminum can be obtained, and both the above blends have obtained good results in both room temperature stability and low temperature stability. Use these methyl acetates as aluminum corrosion inhibitors. You can see that
Further, from the result of adding both methyl acetate and water shown in “EIB15-SM” of FIG. 11, even when the amount of water added is reduced, good corrosion prevention ability of aluminum is obtained, and these water In addition to the fact that the room temperature and low temperature storage stability of the resulting fuel are improved, acetic acid is added when the same amount of water is added as in the case of adding water alone. It can be seen that the addition of methyl further improves the low-temperature stability of the liquid fuel obtained, and it can be seen that these methyl acetates have the effect of reducing the amount of water added and the effect of improving the low-temperature stability.
Further, the result of adding propionaldehyde as an aldehyde instead of water alone and the result of adding propionaldehyde together with water are shown in the formulation name “EIB15-PA” in FIG. When this propionaldehyde is added alone without water, good corrosion resistance of aluminum at 100 ° C. is obtained at 0.6 wt% addition, and 120 ° C. at 1.0 wt% addition. Good corrosion resistance of aluminum can be obtained, and both the above blends have obtained good results in both room temperature stability and low temperature stability, and these acetaldehydes can be used well as an aluminum corrosion inhibitor. I understand that I can do it.
Further, from the result of adding both propionaldehyde and water shown in “EIB15-PA” in FIG. 11, even if the amount of water added is reduced, good aluminum corrosion prevention ability can be obtained, and these water It can be seen that the room temperature and low-temperature storage stability of the resulting fuel are improved, and it can be seen that these propionaldehydes have the effect of reducing the amount of water added.
In addition, regarding EIB15-E, which is a basic composition containing ether in EIB15, water, methanol, propylene glycol, diethyl ketone, methyl acetate, and propionaldehyde are added in the same manner as EIB15, and the corrosiveness and storage stability of aluminum. FIG. 26 shows the result of the test for. From the results shown in FIG. 26, it can be seen that even when ether is added, the effect obtained in the case of EIB15 is obtained in the same manner. Even when these ethers are blended, water, methanol, propylene glycol, It can be seen that diethyl ketone, methyl acetate, and propionaldehyde can be used effectively.
Next, the basic composition of EIB75, which is Formulation Example 9, is 25% by weight of naphtha, 35% by weight of ethanol, and 40% by weight of isobutyl alcohol, and is a blend in which the proportion of alcohol is increased with respect to EIB40. Also in this EIB75, as shown in FIG. 12, it is understood that there is a weight reduction due to aluminum corrosion due to dry corrosion similar to the EIB40.
With respect to this EIB75, at 90 ° C., even when 0.1% by weight of water is added, the total amount of alcohol contained in the fuel is as large as about 75% by weight, so that good corrosion resistance of aluminum is obtained. However, when 0.2% by weight of water, which exceeds 0.15% by weight obtained by multiplying the total amount of the alcohol by 0.002, is added, it can be seen that good corrosion resistance of aluminum can be obtained. . In addition, at 120 ° C., it can be seen that, when water is added up to 1.2% by weight, good corrosion resistance of aluminum can be obtained at 120 ° C., and the addition of water is effective for aluminum corrosion due to dry corrosion. I understand.
On the other hand, the result of adding methanol in place of the water is shown in the formulation name “EIB75-Me” in FIG. When this methanol is added, it can be seen that the addition of 1.5% by weight improves the corrosion resistance of aluminum, and good corrosion resistance of aluminum can be obtained even at 100 ° C. Also shows good results. The addition of 2.0% by weight gives good results in the corrosion resistance of aluminum at 120 ° C., and does not cause layer separation at room temperature and low temperature. It can be seen that the methanol can be improved as an aluminum corrosion inhibitor.
Further, from the result of adding both methanol and water shown in “EIB75-Me” in FIG. 12, by mixing methanol and water, good corrosion prevention ability of aluminum can be obtained with a smaller amount of methanol. In addition, it can be seen that good room temperature and low temperature storage stability can be obtained, and that these waters have the effect of reducing the amount of methanol added.
Moreover, the result at the time of adding ethylene glycol as glycols instead of the said water is shown by the compounding name "EIB75-EG" of FIG. When this ethylene glycol is added, it can be seen that the addition of 3.0% by weight improves the corrosion resistance of aluminum, and good corrosion resistance of aluminum can be obtained even at 100 ° C. Also shows good results. In addition, the addition of 5.0% by weight gives good results even in the corrosion resistance of aluminum at 120 ° C., and does not cause layer separation at room temperature and low temperature. It can be seen that it can be improved by the addition of glycol, so that these ethylene glycols can be used well as aluminum corrosion inhibitors.
Further, from the result of adding both ethylene glycol and water shown in “EIB75-EG” in FIG. 12, mixing of ethylene glycol and water makes it possible to prevent corrosion of aluminum with a smaller amount of ethylene glycol. It can be seen that, at the same time, good room temperature and low-temperature storage stability can be obtained, and that these waters have the effect of reducing the amount of ethylene glycol added.
Moreover, the result of adding methyl ethyl ketone as the ketone instead of the water and the result of adding it together with water are shown in the formulation name “EIB75-MEK” in FIG. When this methyl ethyl ketone is added alone without water, good aluminum corrosion resistance at 100 ° C. is obtained at 3.0 wt% addition, and at 120 ° C. at 5.0 wt% addition. Good corrosion resistance of aluminum can be obtained, and good results have been obtained for both room temperature stability and low temperature stability in both formulations. It can be seen that these methyl ethyl ketones can be used well as an aluminum corrosion inhibitor.
Further, from the result of adding both methyl ethyl ketone and water shown in “EIB75-MEK” in FIG. 12, by mixing methyl ethyl ketone and water, good aluminum corrosion prevention ability can be obtained with a smaller amount of methyl ethyl ketone. In addition, it can be seen that good room temperature and low-temperature storage stability can be obtained, and that these waters have an effect of reducing the amount of methyl ethyl ketone added.
Moreover, the result of adding methyl formate alone as an ester in place of the water and the result of adding methyl formate together with water are shown in the formulation name “EIB75-GM” in FIG. When this methyl formate was added alone without water, good aluminum corrosion resistance at 100 ° C. was obtained at 4.0 wt% addition, and 120 ° C. at 8.0 wt% addition. Good corrosion resistance of aluminum can be obtained, and both the above blends have obtained good results in both room temperature stability and low temperature stability. Use these methyl formates as aluminum corrosion inhibitors. You can see that
Further, from the result of adding both methyl formate and water shown in “EIB75-GM” in FIG. 12, by mixing methyl formate and water, good corrosion prevention of aluminum with a smaller amount of methyl formate. In addition, it can be seen that good room temperature and low-temperature storage stability can be obtained, and that these waters have the effect of reducing the amount of methyl formate added.
Further, the result of adding acetaldehyde alone as an aldehyde instead of the water and the result of adding acetaldehyde together with water are shown in the formulation name “EIB75-AA” in FIG. When this acetaldehyde was added alone without water, good aluminum corrosion resistance at 100 ° C. was obtained at 0.8 wt% addition, and at 120 ° C. at 1.0 wt% addition. Good corrosion resistance of aluminum can be obtained, and both the above blends have obtained good results in both room temperature stability and low temperature stability, and these acetaldehyde can be used well as an aluminum corrosion inhibitor. I understand.
Moreover, from the result when both acetaldehyde and water shown in “EIB75-AA” in FIG. 12 are added, by mixing acetaldehyde and water, good corrosion prevention ability of aluminum can be obtained with a smaller amount of acetaldehyde. In addition, it can be seen that good room temperature and low-temperature storage stability can be obtained, and that these waters have the effect of reducing the amount of acetaldehyde added.
In addition, regarding “EIB75-E”, which is a basic composition containing ether in EIB75, water, methanol, ethylene glycol, methyl ethyl ketone, methyl formate, and acetaldehyde are added to the corrosiveness and storage stability of aluminum in the same manner as EIB75. The results of the test are shown in FIG. From the results shown in FIG. 27, it can be seen that even when ether is added, the effect obtained in the case of EIB75 is obtained in the same manner. Even when these ethers are blended, water, methanol, ethylene glycol, It can be seen that methyl ethyl ketone, methyl formate, and acetaldehyde can be used effectively.
Next, the basic composition of PNB30, which is Formulation Example 10, is 70% by weight of naphtha, 10% by weight of isopropyl alcohol, 10% by weight of n-butanol, and 10% by weight of isobutyl alcohol. is there.
When water is added up to 0.1 wt% at 80 ° C. and, for example, up to 1.8 wt% at 120 ° C., the PNB 30 loses weight loss due to aluminum corrosion, as shown in FIG. On the other hand, it can be seen that the corrosion resistance has been improved, while those having no added water or 0.1% by weight have no problem in storage stability at a low temperature of minus 10 ° C. On the other hand, when water was added up to 1.8% by weight at which the weight loss due to aluminum corrosion did not occur at 120 ° C., layer separation occurred in the storage stability test at −10 ° C. and 2.0% by weight of water. In addition, it can be seen that layer separation occurs even at room temperature, and it can be seen that the addition of water has an effect on aluminum corrosion due to dry corrosion. In order to obtain a capacity also prevents good aluminum corrosion have at water, it can be seen that the storage stability by water addition is reduced.
On the other hand, the result of adding methanol in place of the water is shown in the formulation name “PNB30-Me” in FIG. When this methanol is added, good corrosion resistance of aluminum can be obtained even at 100 ° C. when 1.0% by weight is added, and the low temperature stability is also good. In addition, the addition of 1.5% by weight gives good results even in the corrosion resistance of aluminum at 120 ° C., and does not cause layer separation at room temperature and low temperature. It can be seen that the methanol can be improved as an aluminum corrosion inhibitor.
Moreover, from the result when both methanol and water shown in “PNB30-Me” in FIG. 13 are added, even if the amount of water added is reduced, good corrosion prevention ability of aluminum can be obtained, and these water Since the addition amount can be reduced, not only is it understood that the storage stability of the resulting fuel at room temperature and low temperature is improved, but these methanols are added when the same addition amount as that when the water alone is added. It can be seen that the low temperature stability of the resulting liquid fuel is improved by further adding, and that these methanols have the effect of reducing the amount of water added and the effect of improving the low temperature stability.
Moreover, the result at the time of adding ethylene glycol as glycols instead of the said water is shown by the compounding name "PNB30-EG" of FIG. When this ethylene glycol is added, it can be seen that the addition of 2.0% by weight improves the corrosion resistance of aluminum, and good corrosion resistance of aluminum can be obtained even at 100 ° C. Also shows good results. The addition of 2.5% by weight gives good results even in the corrosion resistance of aluminum at 120 ° C., and does not cause layer separation at room temperature and low temperature. It can be seen that it can be improved by the addition of glycol, so that these ethylene glycols can be used well as aluminum corrosion inhibitors.
Further, from the result of adding both ethylene glycol and water shown in “PNB30-EG” in FIG. 13, even when the amount of water added is reduced, good aluminum corrosion prevention ability can be obtained, and these water It can be seen that the room temperature and low-temperature storage stability of the resulting fuel are improved, and that these ethylene glycols have the effect of reducing the amount of water added.
Moreover, the result at the time of adding acetone instead of the said water as ketones, and the result at the time of adding with water are shown by the compounding name "PNB30-Ac" of FIG. When this acetone is added alone without water, good corrosion resistance of aluminum at 100 ° C. and 120 ° C. is obtained at 0.2 wt% addition, and both formulations are stable at room temperature and stable at low temperature. Good results were obtained in both properties and it can be seen that these acetones can be used well as an aluminum corrosion inhibitor.
Moreover, from the result when both acetone and water shown in “PNB30-Ac” in FIG. 13 are added, even if the amount of water added is reduced, good corrosion prevention ability of aluminum can be obtained. Since the addition amount can be reduced, it can be seen that the storage stability of the resulting fuel at room temperature and low temperature is improved, and these acetones are added when the same addition amount as in the case of adding water alone is added. It can be seen that the low temperature stability of the obtained liquid fuel is improved by further adding, and that these acetones have the effect of reducing the amount of water added and the effect of improving the low temperature stability.
Moreover, the result of adding methyl formate alone as an ester in place of the water and the result of adding methyl formate together with water are shown in the formulation name “PNB30-GM” in FIG. When this methyl formate was added alone without water, good aluminum corrosion resistance at 100 ° C. was obtained at 1.5 wt% addition, and 120 ° C. at 2.5 wt% addition. In addition to the good corrosion resistance of aluminum in the above, both the above-mentioned blends have obtained good results in both room temperature stability and low temperature stability. Use these methyl formates as aluminum corrosion inhibitors. You can see that
Further, from the result when both methyl formate and water shown in “PNB30-GM” in FIG. 13 are added, even when the amount of water added is reduced, good aluminum corrosion prevention ability is obtained, and these water In addition to the fact that the room temperature and low temperature storage stability of the resulting fuel are improved, the formic acid is added when the same amount of addition as that of the water alone is added. It can be seen that the addition of methyl further improves the low-temperature stability of the resulting liquid fuel, and that these methyl formates have the effect of reducing the amount of water added and the effect of improving low-temperature stability.
Further, the result of adding butyraldehyde alone as an aldehyde instead of the water and the result of adding butyraldehyde together with water are shown in the formulation name “PNB30-BA” in FIG. When this butyraldehyde was added alone without water, good aluminum corrosion resistance at 100 ° C. was obtained at 0.4 wt% addition, and 120 ° C. at 0.5 wt% addition. Good corrosion resistance of aluminum can be obtained, and in both the above formulations, good results have been obtained in both room temperature stability and low temperature stability, and these butyraldehydes should be used well as aluminum corrosion inhibitors. You can see that
Further, from the result when both butyraldehyde and water shown in “PNB30-BA” of FIG. 13 are added, even when the amount of water added is reduced, good corrosion prevention ability of aluminum can be obtained. From this, it can be seen that the room temperature and low temperature storage stability of the resulting fuel are improved, and that these butyraldehydes have the effect of reducing the amount of water added.
In addition, regarding “PNB30-E”, which is a basic composition containing ether in these PNB30s, as with PNB30, the addition of water, methanol, ethylene glycol, acetone, methyl formate, butyraldehyde, corrosiveness and storage stability of aluminum The results of the test are shown in FIG. From the results shown in FIG. 28, it can be seen that even when ether is added, the effect obtained in the case of the PNB30 is obtained in the same manner, and even when these ethers are blended, water, methanol, ethylene glycol It can be seen that acetone, methyl formate, and butyraldehyde can be used effectively.
Next, the basic composition of PNB15 which is Formulation Example 11 is naphtha 85% by weight, isopropyl alcohol 5% by weight, n-butanol 5% by weight, isobutyl alcohol 5% by weight, and there are three types of alcohol. There are few formulations. Also in this PNB15, as shown in FIG. 14, it turns out that there exists a weight reduction by the aluminum corrosion by the dry corrosion similar to another mixing | blending.
When water is added to 0.1 wt% at 80 ° C. (treatment time 120 hours) and water is added to 0.5 wt% at 120 ° C. (treatment time 24 hours), the PNB 15 is shown in FIG. As can be seen, the weight loss due to aluminum corrosion is eliminated and the corrosion resistance is improved. On the other hand, those having no added water or those containing 0.1% by weight of water have a low temperature of minus 10 While there is no problem in storage stability at ℃, when water is added up to 0.5 wt% at 120 ° C where weight loss due to aluminum corrosion does not occur, layer separation is performed in the storage stability test at -10 ° C. It can be seen that when 0.7% by weight of water is added, layer separation occurs even at room temperature, and the addition of water has an effect on aluminum corrosion due to dry corrosion. Seen other hand, when even a good aluminum corrosion ability to be obtained with water at 120 ° C. is a high temperature, it can be seen that the storage stability by water addition is reduced.
On the other hand, the result of adding methanol in place of the water is shown in the formulation name “PNB15-Me” in FIG. When this methanol is added, it can be seen that the addition of 0.8% by weight improves the corrosion resistance of aluminum, and good corrosion resistance of aluminum can be obtained even at 100 ° C. Also shows good results. In addition, the addition of 1.5% by weight gives good results even in the corrosion resistance of aluminum at 120 ° C., and does not cause layer separation at room temperature and low temperature. It can be seen that the methanol can be improved as an aluminum corrosion inhibitor.
Further, from the result when both methanol and water shown in “PNB15-Me” of FIG. 14 are added, even if the amount of water added is reduced, good corrosion prevention ability of aluminum is obtained, and these water Since the addition amount can be reduced, not only is it understood that the storage stability of the resulting fuel at room temperature and low temperature is improved, but these methanols are added when the same addition amount as that when the water alone is added. It can be seen that the low temperature stability of the resulting liquid fuel is improved by further adding, and that these methanols have the effect of reducing the amount of water added and the effect of improving the low temperature stability.
Moreover, the result at the time of adding propylene glycol as glycols instead of the said water is shown by the compounding name "PNB15-PG" of FIG. When this propylene glycol is added, it can be seen that the addition of 3.0% by weight improves the corrosion resistance of aluminum, and good corrosion resistance of aluminum can be obtained even at 100 ° C. Also shows good results. The addition of 4.0% by weight gives good results in the corrosion resistance of aluminum at 120 ° C., and does not cause layer separation at room temperature and low temperature. It can be seen that it can be improved by the addition of glycol, so that these propylene glycols can be used favorably as aluminum corrosion inhibitors.
Further, from the result of adding both propylene glycol and water shown in “PNB15-PG” in FIG. 14, even when the amount of water added is reduced, good corrosion prevention ability of aluminum is obtained, and these water It can be seen that the room temperature and low temperature storage stability of the resulting fuel are improved, and it can be seen that these propylene glycols have the effect of reducing the amount of water added.
Further, the result of adding methyl n-propyl ketone as the ketone instead of the water and the result of adding methyl n-propyl ketone together with water are shown in the formulation name “PNB15-MPK” in FIG. When this methyl n-propyl ketone was added alone without water, good aluminum corrosion resistance at 100 ° C. was obtained at 0.3 wt% addition, and 120 ° C. at 0.5 wt% addition. In addition to being able to obtain good corrosion resistance of aluminum at both temperatures, both formulations have good results in both room temperature stability and low temperature stability. These methyl n propyl ketones can be used well as aluminum corrosion inhibitors. I understand that I can do it.
Further, from the result when both methyl n-propyl ketone and water shown in “PNB15-MPK” in FIG. 14 are added, good aluminum corrosion prevention ability can be obtained even if the amount of water added is reduced. Since the amount of water added can be reduced, not only is it understood that the room temperature and low-temperature storage stability of the resulting fuel is improved, but also when the same amount of water is added as when the water alone is added. Further, it can be seen that the addition of these methyl n-propyl ketones improves the low-temperature stability of the liquid fuel obtained, and these methyl n-propyl ketones reduce the amount of water added and improve the low-temperature stability. It turns out that there is an effect.
Further, the result of adding methyl acetate alone as an ester instead of the water and the result of adding methyl acetate together with water are shown in the formulation name “PNB15-SM” in FIG. When this methyl acetate was added alone without water, good aluminum corrosion resistance at 100 ° C. was obtained at 1.5 wt% addition, and 120 ° C. at 6.0 wt% addition. Good corrosion resistance of aluminum can be obtained, and both the above blends have obtained good results in both room temperature stability and low temperature stability. Use these methyl acetates as aluminum corrosion inhibitors. You can see that
Further, from the result of adding both methyl acetate and water shown in “PNB15-SM” of FIG. 14, even when the amount of water added is reduced, good corrosion prevention ability of aluminum can be obtained, and these water In addition to the fact that the room temperature and low temperature storage stability of the resulting fuel are improved, acetic acid is added when the same amount of water is added as in the case of adding water alone. It can be seen that the addition of methyl further improves the low-temperature stability of the liquid fuel obtained, and it can be seen that these methyl acetates have the effect of reducing the amount of water added and the effect of improving the low-temperature stability.
Further, the result of adding acetaldehyde alone as an aldehyde instead of water and the result of adding acetaldehyde together with water are shown in the formulation name “PNB15-AA” in FIG. When this acetaldehyde was added alone without water, good aluminum corrosion resistance at 100 ° C. was obtained at 0.3 wt% addition, and at 120 ° C. at 0.5 wt% addition. Good corrosion resistance of aluminum can be obtained, and both the above blends have obtained good results in both room temperature stability and low temperature stability, and these acetaldehyde can be used well as an aluminum corrosion inhibitor. I understand.
Moreover, from the result when both acetaldehyde and water shown in “PNB15-AA” in FIG. 14 are added, even when the amount of water added is reduced, good corrosion prevention ability of aluminum is obtained, and these water Since the addition amount can be reduced, it can be seen that the room temperature and low-temperature storage stability of the obtained fuel are improved, and it can be seen that these acetaldehydes have the effect of reducing the addition amount of water.
In addition, regarding PNB15-E, which is a basic compound containing ether in PNB15, water, methanol, propylene glycol, methyl n propyl ketone, methyl acetate, and acetaldehyde are added in the same way as PNB15 to protect the corrosiveness and storage stability of aluminum. The result of having conducted the test about sex is shown in FIG. From the results shown in FIG. 29, it can be seen that the effect obtained in the case of the PNB15 was obtained in the same manner even when ether was added. Even when these ethers were blended, water, methanol, propylene glycol It can be seen that methyl n-propyl ketone, methyl acetate, and acetaldehyde can be used effectively.
Next, the basic composition of PNB75 as Formulation Example 12 is naphtha 25% by weight, isopropyl alcohol 25% by weight, n-butanol 25% by weight, isobutyl alcohol 25% by weight, three types of alcohol, and high It is a blend of alcohol ratio.
With respect to this PNB75, at 80 ° C. (treatment time of 120 hours), even if 0.1% by weight of water is added, the total amount of alcohol contained in the fuel is as large as about 75% by weight. When 0.2% by weight of water, which exceeds 0.15% by weight obtained by multiplying the total amount of alcohol by 0.002, is added, the corrosion resistance of aluminum is good. It can be seen that Further, at 120 ° C. (treatment time of 24 hours), it can be seen that, when water is added to, for example, 10.0% by weight, good corrosion resistance of aluminum is obtained at 120 ° C., while these waters are not added. In the case of those having 0.1% by weight or 0.2% by weight added, there is no problem in storage stability at minus 10 ° C. which is a low temperature, whereas weight loss due to aluminum corrosion does not occur at 120 ° C. 10.0. When water was added up to 10% by weight, layer separation occurred in a low temperature storage test at minus 10 ° C., and it was found that 10.5% by weight of water would cause layer separation even at room temperature. While the addition is found to be effective for aluminum corrosion due to dry corrosion, obtain good aluminum corrosion prevention ability with water even at a high temperature of 120 ° C. When A, it can be seen that the storage stability by water addition is reduced.
On the other hand, the result of adding methanol instead of the water is shown in the formulation name “PNB75-Me” in FIG. When this methanol is added, good corrosion resistance of aluminum can be obtained even at 100 ° C. when 1.0% by weight is added, and the low temperature stability is also good. The addition of 2.0% by weight gives good results in the corrosion resistance of aluminum at 120 ° C., and does not cause layer separation at room temperature and low temperature. It can be seen that the methanol can be improved as an aluminum corrosion inhibitor.
Further, from the result when both methanol and water shown in “PNB75-Me” in FIG. 15 are added, even when the amount of water added is reduced, good corrosion prevention ability of aluminum can be obtained, and these water Since the addition amount can be reduced, not only is it understood that the storage stability of the resulting fuel at room temperature and low temperature is improved, but these methanols are added when the same addition amount as that when the water alone is added. It can be seen that the low temperature stability of the resulting liquid fuel is improved by further adding, and that these methanols have the effect of reducing the amount of water added and the effect of improving the low temperature stability.
Moreover, the result at the time of adding ethylene glycol as glycols instead of the said water is shown by the compounding name "PNB75-EG" of FIG. When this ethylene glycol is added, it can be seen that the addition of 4.0% by weight improves the corrosion resistance of aluminum, and good corrosion resistance of aluminum can be obtained even at 100 ° C. Also shows good results. In addition, the addition of 6.0% by weight gives good results even in the corrosion resistance of aluminum at 120 ° C., and does not cause layer separation at room temperature and low temperature. It can be seen that it can be improved by the addition of glycol, so that these ethylene glycols can be used well as aluminum corrosion inhibitors.
Further, from the result when both ethylene glycol and water shown in “PNB75-EG” in FIG. 15 are added, even if the amount of water added is reduced, good aluminum corrosion prevention ability can be obtained, and these water It can be seen that the room temperature and low-temperature storage stability of the resulting fuel are improved, and that these ethylene glycols have the effect of reducing the amount of water added.
Further, the result of adding methyl ethyl ketone as the ketone instead of the water and the result of adding it together with water are shown in the combination name “PNB75-MEK” in FIG. When this methyl ethyl ketone was added alone without water, good aluminum corrosion resistance at 100 ° C. was obtained at 0.3 wt% addition, and good at 120 ° C. at 0.5 wt% addition. The corrosion resistance of aluminum can be obtained, and both formulations have good results in both room temperature stability and low temperature stability. It can be seen that these methyl ethyl ketones can be used well as an aluminum corrosion inhibitor.
Further, from the result of adding both methyl ethyl ketone and water shown in “PNB75-MEK” in FIG. 15, even when the amount of water added is reduced, good corrosion prevention ability of aluminum can be obtained, and these water Since the addition amount can be reduced, not only is it understood that the storage stability of the resulting fuel at room temperature and low temperature is improved, but when the addition amount similar to the case where the above water alone is added, these methyl ethyl ketones are added. It can be seen that the low temperature stability of the obtained liquid fuel is improved by further adding, and that methyl ethyl ketone has an effect of reducing the amount of water added and an effect of improving the low temperature stability.
Moreover, the result of adding ethyl formate alone as an ester in place of the water and the result of adding ethyl formate together with water are shown in the formulation name “PNB75-GE” in FIG. When this ethyl formate was added alone without water, good corrosion resistance of aluminum at 100 ° C. was obtained at 4.0 wt% addition, and 120 ° C. at 6.0 wt% addition. Good corrosion resistance of aluminum can be obtained, and both the above blends have obtained good results in both room temperature stability and low temperature stability. Use these ethyl formates as aluminum corrosion inhibitors. You can see that
Further, from the result of adding both ethyl formate and water shown in “PNB75-GE” of FIG. 15, even when the amount of water added is reduced, good aluminum corrosion prevention ability is obtained, and these water In addition to the fact that the room temperature and low temperature storage stability of the resulting fuel are improved, the formic acid is added when the same amount of addition as that of the water alone is added. It can be seen that the addition of ethyl further improves the low-temperature stability of the resulting liquid fuel, and it can be seen that these ethyl formates have the effect of reducing the amount of water added and the effect of improving the low-temperature stability.
Further, the result of adding propionaldehyde as an aldehyde instead of water alone and the result of adding propionaldehyde together with water are shown in the formulation name “PNB75-PA” in FIG. When this propionaldehyde was added alone without water, good aluminum corrosion resistance at 100 ° C. was obtained at 0.3 wt% addition, and 120 ° C. at 0.5 wt% addition. Good corrosion resistance of aluminum can be obtained, and both the above blends have obtained good results in both room temperature stability and low temperature stability. Propionaldehyde should be used well as an aluminum corrosion inhibitor. You can see that
Further, from the result of adding both propionaldehyde and water shown in “PNB75-PA” in FIG. 15, even when the amount of water added is reduced, good corrosion prevention ability of aluminum is obtained, and these water It can be seen that the room temperature and low-temperature storage stability of the resulting fuel are improved, and it can be seen that these propionaldehydes have the effect of reducing the amount of water added.
In addition, with respect to “PNB75-E”, which is a basic composition containing ether in PNB75, as in PNB75, water, methanol, ethylene glycol, methyl ethyl ketone, ethyl formate, and propionaldehyde are added to corrode and store stability of aluminum. The result of having conducted the test about is shown in FIG. From the results shown in FIG. 30, it can be seen that even when ether is added, the effect obtained in the case of the PNB75 is obtained in the same manner, and even when these ethers are blended, water, methanol, ethylene glycol It can be seen that methyl ethyl ketone, ethyl formate, and propionaldehyde can be used effectively.
Next, the basic composition of EIPP 30 which is Formulation Example 13 is naphtha 70% by weight, ethanol 10% by weight, isopropyl alcohol 10% by weight, and 1-pentanol 10% by weight. It is the composition which was made.
When water is added to this EIPP 30 at 80 ° C. (treatment time 120 hours) up to 0.1% by weight, and at 120 ° C. (treatment time 24 hours), water is added up to, for example, 2.5% by weight. As shown in Fig. 4, the weight loss due to aluminum corrosion has disappeared, and it can be seen that the corrosion resistance has been improved. On the other hand, those with no added water or those with 0.1% by weight added have a low temperature. While there is no problem in storage stability at minus 10 ° C, water added up to 2.5% by weight at 120 ° C where weight loss due to aluminum corrosion does not occur is a layer in a low-temperature storage stability test at minus 10 ° C. In addition to separation, it can be seen that the addition of 3.0% by weight of water results in layer separation even at room temperature, and the addition of water contributes to aluminum corrosion due to dry corrosion. While it is found that there is a result, in the case where even a good aluminum corrosion ability to be obtained with water at 120 ° C. is a high temperature, it can be seen that the storage stability by water addition is reduced.
On the other hand, the result of adding methanol instead of the water is shown in the formulation name “EIPP30-Me” in FIG. When this methanol is added, good aluminum corrosion resistance is obtained even at 100 ° C. when 1.5% by weight is added, and low temperature stability is also good. The addition of 2.5% by weight gives good results in the corrosion resistance of aluminum at 120 ° C., and does not cause layer separation at room temperature and low temperature. It can be seen that the methanol can be improved as an aluminum corrosion inhibitor.
Moreover, from the result when both methanol and water shown in “EIPP30-Me” in FIG. 16 are added, even when the amount of water added is reduced, good corrosion prevention ability of aluminum is obtained, and these water Since the addition amount can be reduced, it can be seen that the room temperature and low-temperature storage stability of the obtained fuel are improved, and it can be seen that these methanols have the effect of reducing the addition amount of water.
Moreover, the result at the time of adding ethylene glycol as glycols instead of the said water is shown by the compounding name "EIPP30-EG" of FIG. When this ethylene glycol is added, it can be seen that the addition of 2.0% by weight improves the corrosion resistance of aluminum, and good corrosion resistance of aluminum can be obtained even at 100 ° C. Also shows good results. In addition, the addition of 5.0% by weight gives good results even in the corrosion resistance of aluminum at 120 ° C., and does not cause layer separation at room temperature and low temperature. It can be seen that it can be improved by the addition of glycol, so that these ethylene glycols can be used well as aluminum corrosion inhibitors.
Further, from the result when both ethylene glycol and water shown in “EIPP30-EG” in FIG. 16 are added, even if the amount of water added is reduced, good aluminum corrosion prevention ability is obtained, and these water It can be seen that the room temperature and low-temperature storage stability of the resulting fuel are improved, and that these ethylene glycols have the effect of reducing the amount of water added.
Further, the result of adding acetone as a ketone instead of the water and the result of adding acetone together with water are shown in the formulation name “EIPP30-Ac” in FIG. When this acetone was added alone without water, good aluminum corrosion resistance at 100 ° C. was obtained at 3.0 wt% addition, and good at 120 ° C. at 4.0 wt% addition. Corrosion resistance of aluminum is obtained, and both formulations have good results in both room temperature stability and low temperature stability, and it can be seen that these acetones can be used well as an aluminum corrosion inhibitor.
Further, from the result of adding both acetone and water shown in “EIPP30-Ac” in FIG. 16, even when the amount of water added is reduced, good aluminum corrosion prevention ability can be obtained, and these water Since the addition amount can be reduced, it can be seen that the storage stability of the resulting fuel at room temperature and low temperature is improved, and these acetones are added when the same addition amount as in the case of adding water alone is added. It can be seen that the low temperature stability of the obtained liquid fuel is improved by further adding, and that these acetones have the effect of reducing the amount of water added and the effect of improving the low temperature stability.
Moreover, the result of adding methyl formate alone as an ester in place of the water and the result of adding methyl formate together with water are shown in the formulation name “EIPP30-GM” in FIG. When this methyl formate was added alone without water, good aluminum corrosion resistance at 100 ° C. was obtained at 1.5 wt% addition, and 120 ° C. at 6.0 wt% addition. Good corrosion resistance of aluminum can be obtained, and both the above blends have obtained good results in both room temperature stability and low temperature stability. Use these methyl formates as aluminum corrosion inhibitors. You can see that
Further, from the results of adding both methyl formate and water shown in “EIPP30-GM” in FIG. 16, even when the amount of water added is reduced, good aluminum corrosion prevention ability is obtained, and these water In addition to the fact that the room temperature and low temperature storage stability of the resulting fuel are improved, the formic acid is added when the same amount of addition as that of the water alone is added. It can be seen that the addition of methyl further improves the low-temperature stability of the resulting liquid fuel, and that these methyl formates have the effect of reducing the amount of water added and the effect of improving low-temperature stability.
Further, the result of adding butyraldehyde alone as an aldehyde instead of the water and the result of adding butyraldehyde together with water are shown in the formulation name “EIPP30-BA” in FIG. When this butyraldehyde was added alone without water, good corrosion resistance of aluminum at 100 ° C. was obtained at 0.6 wt% addition, and 120 ° C. at 1.0 wt% addition. Good corrosion resistance of aluminum can be obtained, and in both the above formulations, good results have been obtained in both room temperature stability and low temperature stability, and these butyraldehydes should be used well as aluminum corrosion inhibitors. You can see that
Further, from the result when both butyraldehyde and water shown in “EIPP30-BA” of FIG. 16 are added, even when the amount of water added is reduced, good aluminum corrosion prevention ability can be obtained, and these water From this, it can be seen that the room temperature and low temperature storage stability of the resulting fuel are improved, and that these butyraldehydes have the effect of reducing the amount of water added.
In addition, regarding “EIPP30-E”, which is a basic composition containing ether in EIPP 30, water, methanol, ethylene glycol, acetone, methyl formate and butyraldehyde are added to the corrosiveness and storage stability of aluminum as in EIPP 30. The result of carrying out the test is shown in FIG. From the results shown in FIG. 31, it can be seen that even when ether is added, the effect obtained in the case of the EIPP 30 is obtained in the same manner, and even when these ethers are blended, water, methanol, ethylene glycol It can be seen that acetone, methyl formate, and butyraldehyde can be used effectively.
Next, the basic composition of EIPP 15 as Formulation Example 14 is 85% by weight of naphtha, 5% by weight of ethanol, 5% by weight of isopropyl alcohol, and 5% by weight of 1-pentanol, and the alcohol type is a combination different from that of PNB30. And the ratio is small.
With respect to this EIPP 15, when water is added up to 0.1 wt% at 80 ° C. (treatment time 120 hours) and water is added up to 0.8 wt% at 120 ° C. (treatment time 24 hours), FIG. As shown, the weight loss due to aluminum corrosion has disappeared, and it can be seen that the corrosion resistance has been improved. There is no problem with storage stability at 10 ° C, but water added to 0.8% by weight at 120 ° C where weight loss due to aluminum corrosion does not occur is the result of layer separation in the low temperature storage stability test at minus 10 ° C. It can be seen that when 1.0% by weight of water is added, layer separation occurs even at room temperature, and the addition of water has an effect on aluminum corrosion due to dry corrosion. While it is understood, when even a good aluminum corrosion ability to be obtained with water at 120 ° C. is a high temperature, it can be seen that the storage stability by water addition is reduced.
On the other hand, the result of adding methanol in place of the water is shown in the formulation name “EIPP15-Me” in FIG. When this methanol is added, it can be seen that the addition of 1.0% by weight improves the corrosion resistance of aluminum, and good corrosion resistance of aluminum is obtained even at 100 ° C., and stability at low temperature Also shows good results. The addition of 2.0% by weight gives good results in the corrosion resistance of aluminum at 120 ° C., and does not cause layer separation at room temperature and low temperature. It can be seen that the methanol can be improved as an aluminum corrosion inhibitor.
Moreover, from the result when both methanol and water shown in “EIPP15-Me” in FIG. 17 are added, even when the amount of water added is reduced, good corrosion prevention ability of aluminum can be obtained. Since the addition amount can be reduced, it can be seen that the room temperature and low-temperature storage stability of the obtained fuel are improved, and it can be seen that these methanols have the effect of reducing the addition amount of water.
Moreover, the result at the time of adding propylene glycol as glycols instead of the said water is shown by the compounding name "EIPP15-PG" of FIG. When this propylene glycol is added, it can be seen that the addition of 2.5% by weight improves the corrosion resistance of aluminum, and good aluminum corrosion resistance is obtained even at 100 ° C. Also shows good results. The addition of 4.0% by weight gives good results in the corrosion resistance of aluminum at 120 ° C., and does not cause layer separation at room temperature and low temperature. It can be seen that it can be improved by the addition of glycol, so that these propylene glycols can be used favorably as aluminum corrosion inhibitors.
Further, from the result of adding both propylene glycol and water shown in “EIPP15-PG” in FIG. 17, even when the amount of water added is reduced, good aluminum corrosion prevention ability can be obtained, and these water It can be seen that the room temperature and low temperature storage stability of the resulting fuel are improved, and it can be seen that these propylene glycols have the effect of reducing the amount of water added.
Moreover, the result of adding diethyl ketone as a ketone instead of the water and the result of adding it together with water are shown in the formulation name “EIPP15-DEK” in FIG. When this diethyl ketone is added alone without water, good corrosion resistance of aluminum at 100 ° C. is obtained when 2.0% by weight is added, and good at 120 ° C. when 3.0% by weight is added. The corrosion resistance of aluminum is obtained, and both formulations have good results at room temperature stability and low temperature stability. It can be seen that these diethyl ketones can be used well as an aluminum corrosion inhibitor.
Further, from the result of adding both diethylketone and water shown in “EIPP15-DEK” in FIG. 17, even when the amount of water added is reduced, good aluminum corrosion prevention ability can be obtained. In addition to the fact that the room temperature and low temperature storage stability of the resulting fuel are improved, the addition of the same amount of water as those when the water alone is added It can be seen that the addition of diethyl ketone further improves the low-temperature stability of the resulting liquid fuel, and that these diethyl ketones have the effect of reducing the amount of water added and the effect of improving low-temperature stability. .
Further, the result of adding methyl acetate alone as an ester instead of the water and the result of adding methyl acetate together with water are shown in the formulation name “EIPP15-SM” in FIG. When this methyl acetate was added alone without water, good aluminum corrosion resistance at 100 ° C. was obtained with the addition of 1.2% by weight, and 120 ° C. with the addition of 4.0% by weight. Good corrosion resistance of aluminum can be obtained, and both the above blends have obtained good results in both room temperature stability and low temperature stability. Use these methyl acetates as aluminum corrosion inhibitors. You can see that
Further, from the result of adding both methyl acetate and water shown in “EIPP15-SM” in FIG. 17, even if the amount of water added is reduced, good corrosion prevention ability of aluminum is obtained, and these water In addition to the fact that the room temperature and low temperature storage stability of the resulting fuel are improved, acetic acid is added when the same amount of water is added as in the case of adding water alone. It can be seen that the addition of methyl further improves the low-temperature stability of the liquid fuel obtained, and it can be seen that these methyl acetates have the effect of reducing the amount of water added and the effect of improving the low-temperature stability.
Further, the result of adding propionaldehyde as an aldehyde instead of water alone and the result of adding propionaldehyde together with water are shown in the formulation name “EIPP15-PA” in FIG. When this propionaldehyde was added alone without water, good aluminum corrosion resistance at 100 ° C. was obtained at 0.5 wt% addition, and 120 ° C. at 0.8 wt% addition. Good corrosion resistance of aluminum can be obtained, and both the above blends have obtained good results in both room temperature stability and low temperature stability. Propionaldehyde should be used well as an aluminum corrosion inhibitor. You can see that
Moreover, from the result of adding both propionaldehyde and water shown in “EIPP15-PA” in FIG. 17, even if the amount of water added is reduced, good corrosion prevention ability of aluminum can be obtained. It can be seen that the room temperature and low-temperature storage stability of the resulting fuel are improved, and it can be seen that these propionaldehydes have the effect of reducing the amount of water added.
In addition, regarding “EIPP15-E”, which is a basic composition containing ether in EIPP15, water, methanol, propylene glycol, diethylketone, methyl acetate, propionaldehyde are added in the same manner as EIPP15, and the corrosiveness and storage stability of aluminum. FIG. 32 shows the result of the test for. From the results shown in FIG. 32, it can be seen that even when ether is added, the effect obtained in the case of the EIPP 15 is obtained in the same manner. Even when these ethers are blended, water, methanol, propylene glycol It can be seen that diethyl ketone, methyl acetate, and propionaldehyde can be used effectively.
Next, the basic composition of EIPP 75 as Formulation Example 15 is naphtha 25% by weight, ethanol 25% by weight, isopropyl alcohol 25% by weight, and 1-pentanol 25% by weight. And a high alcohol ratio. Also in this EIPP 75, as shown in FIG. 18, it is understood that there is a weight reduction due to aluminum corrosion due to dry corrosion similar to the EIPP 15.
Even if 0.1% by weight of water is added to this EIPP 75 at 80 ° C. (treatment time 120 hours), the total amount of alcohol contained in the fuel is as large as about 75% by weight as shown in FIG. Therefore, good corrosion resistance of aluminum is not obtained, and it is good when 0.2% by weight of water, which is a value exceeding 0.15% by weight obtained by multiplying the total amount of alcohol by 0.002, is added. It can be seen that the corrosion resistance of aluminum is obtained. In addition, at 120 ° C., it can be seen that if water is added up to 1.7% by weight, good corrosion resistance of aluminum can be obtained at 120 ° C., and the addition of water is effective for aluminum corrosion due to dry corrosion. I understand.
On the other hand, the result of adding methanol instead of the water is shown in the formulation name “EIPP75-Me” in FIG. When this methanol is added, it can be seen that addition of 2.0% by weight improves the corrosion resistance of aluminum, and good corrosion resistance of aluminum can be obtained even at 100 ° C., and stability at low temperature Also shows good results. In addition, the addition of 3.0% by weight gives good results even at the corrosion resistance of aluminum at 120 ° C., and does not cause layer separation at room temperature and low temperature, so that these methanol can be stored at room temperature and low temperature. It can be seen that the methanol can be improved as an aluminum corrosion inhibitor.
Further, from the result of adding both methanol and water shown in “EIPP75-Me” in FIG. 18, by mixing methanol and water, a good aluminum corrosion prevention ability can be obtained with a smaller amount of methanol. In addition, it can be seen that good room temperature and low temperature storage stability can be obtained, and that these waters have the effect of reducing the amount of methanol added.
Further, the result when ethylene glycol is added as a glycol instead of the water is shown in the formulation name “EIPP75-EG” in FIG. When this ethylene glycol is added, it can be seen that the addition of 4.0% by weight improves the corrosion resistance of aluminum, and good corrosion resistance of aluminum can be obtained even at 100 ° C. Also shows good results. The addition of 8.0% by weight gives good results even at 120 ° C aluminum corrosion resistance, and does not cause layer separation at room temperature and low temperature. It can be seen that it can be improved by the addition of glycol, so that these ethylene glycols can be used well as aluminum corrosion inhibitors.
Moreover, from the result when both ethylene glycol and water shown in “EIPP75-EG” in FIG. 18 are added, by mixing ethylene glycol and water, good corrosion prevention of aluminum with a smaller amount of ethylene glycol. It can be seen that, at the same time, good room temperature and low-temperature storage stability can be obtained, and that these waters have the effect of reducing the amount of ethylene glycol added.
Further, the result of adding methyl ethyl ketone as the ketone instead of the water and the result of adding it together with water are shown in the formulation name “EIPP75-MEK” in FIG. When this methyl ethyl ketone is added alone without water, good aluminum corrosion resistance at 100 ° C. is obtained at 3.0 wt% addition, and good at 120 ° C. at 5.0 wt% addition. The corrosion resistance of aluminum can be obtained, and both formulations have good results in both room temperature stability and low temperature stability. It can be seen that these methyl ethyl ketones can be used well as an aluminum corrosion inhibitor.
Further, from the result of adding both methyl ethyl ketone and water shown in “EIPP75-MEK” in FIG. 18, by mixing methyl ethyl ketone and water, good corrosion prevention ability of aluminum can be obtained with a smaller amount of methyl ethyl ketone. In addition, it can be seen that good room temperature and low-temperature storage stability can be obtained, and that these waters have an effect of reducing the amount of methyl ethyl ketone added.
Further, the result of adding methyl formate alone as an ester instead of the water and the result of adding methyl formate together with water are shown in the formulation name “EIPP75-GM” in FIG. When this methyl formate was added alone without water, good aluminum corrosion resistance at 100 ° C. was obtained at 3.0 wt% addition, and 120 ° C. at 9.0 wt% addition. Good corrosion resistance of aluminum can be obtained, and both the above blends have obtained good results in both room temperature stability and low temperature stability. Use these methyl formates as aluminum corrosion inhibitors. You can see that
Further, from the result of adding both methyl formate and water shown in “EIPP75-GM” in FIG. 18, by mixing methyl formate and water, good corrosion prevention of aluminum with a smaller amount of methyl formate. In addition, it can be seen that good room temperature and low-temperature storage stability can be obtained, and that these waters have the effect of reducing the amount of methyl formate added.
Further, the result of adding acetaldehyde alone as an aldehyde instead of the water and the result of adding acetaldehyde together with water are shown in the formulation name “EIPP75-AA” in FIG. When this acetaldehyde was added alone without water, good aluminum corrosion resistance at 100 ° C. was obtained at 0.5 wt% addition, and at 120 ° C. at 1.0 wt% addition. Good corrosion resistance of aluminum can be obtained, and both the above blends have obtained good results in both room temperature stability and low temperature stability, and these acetaldehyde can be used well as an aluminum corrosion inhibitor. I understand.
Further, from the result of adding both acetaldehyde and water shown in “EIPP75-AA” in FIG. 18, even if the amount of water added is reduced, good corrosion prevention ability of aluminum can be obtained, and these water Since the addition amount can be reduced, it can be seen that the room temperature and low-temperature storage stability of the obtained fuel are improved, and it can be seen that these acetaldehydes have the effect of reducing the addition amount of water.
In addition, regarding “EIPP75-E”, which is a basic composition containing ether in EIPP75, water, methanol, ethylene glycol, methyl ethyl ketone, methyl formate, and acetaldehyde are added in the same manner as in EIPP75 for the corrosiveness and storage stability of aluminum. The results of the test are shown in FIG. From the results shown in FIG. 33, it can be seen that the effect obtained in the case of the EIPP 75 is obtained in the same manner even when ether is added. Even when these ethers are blended, water, methanol, ethylene glycol It can be seen that methyl ethyl ketone, methyl formate, and acetaldehyde can be used effectively.
As mentioned above, although the Example of this invention has been demonstrated based on FIGS. 4-34, what put together about the addition effect of water and each aluminum corrosion inhibitor in these each mixing | blending is FIG.
As shown in FIG. 35, by using methanol, glycols, ketones, esters, and aldehydes as an aluminum corrosion inhibitor, an aluminum corrosion prevention effect by addition of a simple substance, or a reduction effect of added water and It can be seen that any of the effects of improving the storage stability by reducing the amount of added water can be obtained. By using these, it is possible to obtain a fuel that is more excellent in preventing aluminum corrosion and has more stable storage stability.
Moreover, as shown in FIG. 35, it turns out that the aluminum corrosion prevention effect can be confirmed in all the mixing | blending by adding water, It can confirm that addition of water is effective in aluminum corrosion prevention.
The amount of water to be added is, as shown in the example of water addition in Formulation Example 0 to Formulation Example 15, in a region where the alcohol ratio contained in the obtained liquid fuel is less than 50% by weight and the alcohol ratio is low. By adding 0.1% by weight or more of water, an effect can be obtained against corrosion at a low temperature of 80 ° C. or the like, but when the alcohol ratio is 50% by weight or more, for example, IN75 or EIB75, As shown in PNB75 and EIPP75, addition of 0.1% by weight of water may not prevent weight reduction due to corrosion, and addition of 0.2% by weight of water may prevent weight reduction due to corrosion. When these alcohol ratios are 50% by weight or more, there is a minimum amount of water depending on the alcohol ratio between 0.1% and 0.2% by weight. It is considered, it was carried out verification tests shown in Figure 37.
In this verification test, as shown in FIG. 37, a blend of IPB75 composed of 25% by weight of naphtha, 35% by weight of isopropyl alcohol, and 35% by weight of isobutyl alcohol was used, and the amount of water added was in units of 0.05% by weight. The corrosion test of aluminum was carried out by changing.
As a result, as shown in FIG. 37, when 0.1% by weight of water is added to 0.13% with respect to 75% by weight of the alcohol, it is caused by corrosion as in the case of IN75, EIB75, PNB75, and EIPP75. While weight reduction occurs, when 0.15% by weight of water, which is 0.2% (= weight ratio × 0.002) with respect to 75% by weight of alcohol, is reduced by corrosion. Since it does not occur, it can be seen that when the alcohol ratio is 50% by weight or more, it is sufficient to add water of 0.2% (= weight ratio × 0.002) or more with respect to the alcohol ratio.
In addition, as described above, the upper limit of the water to be added is that, when water is added alone, low temperature stability and room temperature stability are lowered. What is necessary is just to make it the minimum which can acquire the corrosion prevention effect.
Although the embodiments of the present invention have been described in the above examples, the present invention is not limited to these examples, and modifications and additions within the scope not departing from the gist of the present invention, that is, the present invention. It is optional to add other raw fuels and additives (including metals) within a range where the characteristics of the fuel for internal combustion engines do not change significantly. These fuels for internal combustion engines are also included in the present invention. Needless to say.
In the above embodiment, gasoline fuel has been mainly described, but the present invention is not limited to this, and can be applied to other internal combustion engines such as diesel fuel as these fuels.

Claims (4)

A liquid fuel for an internal combustion engine comprising 2 to 85% by weight of an aliphatic monovalent alcohol having 2 to 6 carbon atoms in the molecule or a mixed alcohol component and 15 to 98% by weight of a hydrocarbon component. There,
When the alcohol component in the liquid fuel for an internal combustion engine is N wt%, 0.002 × N wt% or more or 0.1 wt% of the liquid fuel for an internal combustion engine to be obtained, whichever is larger A liquid fuel for an internal combustion engine, characterized by adding water. A liquid fuel for an internal combustion engine comprising 2 to 85% by weight of an aliphatic monovalent alcohol having 2 to 6 carbon atoms in the molecule or a mixed alcohol component and 15 to 98% by weight of a hydrocarbon component. There,
The obtained liquid fuel for an internal combustion engine includes an aluminum corrosion inhibitor in an amount capable of preventing aluminum corrosion at a predetermined temperature, and the aluminum corrosion inhibitor includes methanol, glycol hydrocarbons, ketone hydrocarbons, A liquid fuel for internal combustion engines, which is at least one of ester hydrocarbons and aldehyde hydrocarbons. The liquid fuel for an internal combustion engine according to claim 2, wherein the liquid fuel for the internal combustion engine contains at least water as the aluminum corrosion inhibitor. The liquid fuel for an internal combustion engine includes at least one ether component having 12 or less carbon atoms in the molecule and having at least one ether bond in the molecule. Liquid fuel for internal combustion engines.

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