JPH1121569A - Water dissolver for diesel light oil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a water dissolver which has excellent water extracting performances and improves lubricating performances even when used in LS light oil by adding a lubrication improver to a water dissolver. SOLUTION: The lubrication improver used is a mono-fatty acid, a fatty acid ester or an amine compound and is used in an amount of desirably 0.001-10 vol. pts. per 100 pts. vol. water dissolver. Further, it is desirable that it contain 0.1-1.0 pt. vol. rust preventive. It is exemplified by an amine salt of benzotriazole or an amine salt of benzoic acid and exhibits rust-preventive effect on metals such as steel, copper and aluminum. The water dissolver contains a solvent such as a hydrocarbon oil or an oxygenated compound as the base. By virtue of its especially its high water extracting performances, a combination of isobutanol with butyl cellosolve is desirable. The mixing ratio is for example such that 1-3 pts. vol. lubrication improver, 97-98 pts. vol. rust solvent and 0.4-0.5 pt. vol. preventive are added to 100 pts. vol. water dissolver. Further, it is also possible to add a corrosion inhibitor, a surfactant, etc., thereto.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water dissolving agent for diesel light oil, and more particularly, to a water dissolving agent for diesel light oil capable of improving the lubricating performance of a diesel engine fuel oil used for diesel vehicles and the like. Things.

[0002]

2. Description of the Related Art In recent years,
As a countermeasure against the exhaust gas pollution of diesel engines accompanying global environmental protection, reduction of sulfur in diesel oil is being promoted. In accordance with the JIS regulations from October 1997, petroleum companies began to increase the sulfur content from 0.2% by weight in July 1997.
The target is set to be reduced to 0.05% by weight (reduction by 0.15% by weight). It is said that a problem in reducing the sulfur content of diesel oil is that abrasion causes troubles in the distribution type fuel injection pump, particularly in diesel vehicles (passenger cars and light trucks).

Conventionally, in order to prevent such abrasion of the fuel pump, it has been technically performed to improve the lubricating performance by adding sulfur. However, when the sulfur reduction is performed as described above, substances exhibiting lubrication performance are removed during desulfurization, so that the lubrication performance of light oil decreases. For this reason, petroleum companies are trying to cope with such a low-sulfur gas oil [LS (Low Sulfur) gas oil] by adding a lubricity improver instead of sulfur.

[0004] Conventionally, diesel vehicles have used a light oil water dissolving agent (water drainage agent) mainly composed of a solvent component to remove moisture from the fuel tank, but the solvent component of the water dissolving agent is also used. There is a problem that the lubrication performance of the fuel pump is reduced. For example, when isobutanol or isopropyl alcohol used as a solvent component of a water dissolving agent is added to light oil, the lubricating performance is slightly worse than when these are not added (light oil blank). Further, when butyl cellosolve used as a solvent component of the water dissolving agent is added to light oil, the lubricating performance is further deteriorated.

Accordingly, it is an object of the present invention to provide a diesel light oil water dissolving agent which has excellent water drainage properties and can improve the lubricating performance of light oil even when used in LS light oil. .

[0006]

Means for Solving the Problems As a result of intensive studies, the present inventors have found that a water-soluble agent to which a lubricity improver is added can achieve the above object, and have reached the present invention.

[0007] That is, the present invention provides a water dissolving agent for diesel light oil, comprising a lubricity improver.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the water dissolving agent for diesel light oil of the present invention will be described in detail. The lubricity improver used in the present invention improves the lubricating performance of light oil. The lubricity improver is not particularly limited, and a lubricity improver generally used for petroleum products is used, and examples thereof include monofatty acids, fatty acid esters, and amine compounds. Of these, amine compounds are preferably used, particularly from the viewpoint of further improving cost and lubricating performance.

Here, as the monofatty acid, the fatty acid ester and the amine compound used as the lubricity improver, commercially available products can be used. Specifically, ADX41 is used as the mono-fatty acid.
01D (trade name, manufactured by British Petroleum),
DCI-4A (trade name, manufactured by Octel America) or the like is used. In addition, as the fatty acid ester, OLI
9050 (trade name, manufactured by Octel America) or the like. Further, as the amine compound, Hitec4
848 (trade name, manufactured by Ethyl Corporation) or the like.

[0010] The content of the above-mentioned lubricity improver is based on the amount of water-soluble agent 1
The amount is preferably 0.001 to 10 parts by volume, more preferably 1 to 3 parts by volume in the 00 parts by volume. When the content of the lubricity improver is less than 0.001 part by volume, lubricity with respect to light oil may be impaired. When the content exceeds 10 parts by volume, water drainage property is reduced and cost becomes high. Therefore, it is preferable to be within the above range.

The water-soluble agent of the present invention can further contain a rust preventive, and by adding the rust preventive,
It is preferable because a water dissolving agent having an excellent rust prevention effect on metals such as steel, copper and aluminum can be obtained.

The rust preventive is not particularly limited, and rust preventives generally used for petroleum products are used. Examples thereof include amine salts of benzotriazole and benzoic acid. Of these, amine salts of benzotriazole are preferably used from the viewpoint of further improving the rust prevention effect. As the amine salt of the benzotriazole,
Commercial products can also be used, and specifically, thiolite B
1051F (trade name, manufactured by Chiyoda Chemical Co., Ltd.) or the like is used.

[0013] The content of the rust inhibitor is preferably 0.1 to 1.0 parts by volume in 100 parts by volume of the water-soluble agent.
More preferably, it is 0.4 to 0.5 parts by volume. When the content of the rust preventive is less than 0.1 part by volume, the rust preventive effect may be reduced. When the content exceeds 1.0 part by volume, the water drainage performance is reduced and the cost is relatively high. Therefore, it is preferable to be within the above range.

In the water-soluble agent of the present invention, a solvent such as a hydrocarbon oil or an oxygen-containing compound is usually used as a main agent.
The handleability and compatibility when mixing a water dissolving agent into diesel light oil can be improved by the solvent. Examples of the solvent include isobutanol, isopropyl alcohol, butyl cellosolve, and the like,
Upon use, they may be used alone or in combination of two or more. Among these solvents, a combination of isobutanol and butyl cellosolve is particularly preferred in terms of high water removal performance. The solvent is used within a range that does not adversely affect the flash point and practicality of diesel light oil.

The content of the solvent is preferably 90 to 98 parts by volume in 100 parts by volume of the water-soluble agent, and is preferably 97 to 9 parts by volume.
More preferably, the capacity is 8 parts by volume. When the content of the solvent is less than 90 parts by volume, the drainage effect may not be improved. When the content is more than 98 parts by volume, the amount of the lubricity improver or the rust inhibitor is inevitably reduced. May not be obtained, so that the content is preferably within the above range.

Further, in addition to the above-mentioned components, additives such as a corrosion inhibitor and a surfactant can be added to the water dissolving agent of the present invention. The content of the above additive is appropriately selected within a range that does not impair the lubricity improving effect and the like according to the present invention, and is not particularly limited.

The water dissolving agent of the present invention can be prepared by a generally known method using the lubricity improver and the solvent, and if necessary, the rust inhibitor and the additives.

The preferred composition of the water-soluble agent of the present invention is as follows:
In 100 parts by volume of the water dissolving agent, the lubricity improver 0.00
It is a composition containing 1 to 10 parts by volume, 90 to 98 parts by volume of the solvent, and 0.1 to 1.0 part by volume of the rust inhibitor. Further, a more preferable composition of the water dissolving agent of the present invention is such that 100 parts by volume of the water dissolving agent, 1 to 3 parts by volume of the lubricity improver, 97 to 98 parts by volume of the solvent, and 0.1% by volume of the rust inhibitor. 4
It is a composition containing up to 0.5 parts by volume.

When the water-soluble agent of the present invention is applied to diesel light oil, the amount of the water-soluble agent of the present invention added to diesel light oil is such that the lubricity improver in the water-soluble agent is based on 100 parts by volume of diesel light oil. An amount of at least 0.4 parts by volume is preferable, and an amount of at least 0.5 parts by volume is more preferable. When the addition amount is less than 0.4 parts by volume,
When the proportion of water contained in the fuel tank is large, a sufficient drainage effect may not be obtained. The upper limit of the addition amount is appropriately selected in consideration of the amount of water contained in the fuel tank, the cost of the added water dissolving agent, and the like.

The water dissolving agent of the present invention is used particularly for various uses of diesel light oil such as diesel passenger cars, diesel trucks, agricultural tractors with diesel engines, and industrial machines such as agricultural machines and construction machines. Can be. In addition, the water dissolving agent of the present invention can be used for any application in which a water dissolving agent is used, in addition to the use where diesel light oil is used.

[0021]

EXAMPLES Examples are shown below to explain the water-soluble agent of the present invention in more detail. However, the present invention is not limited to the examples described below. In the following examples, “part” means “capacitance part” unless otherwise specified.

[Examples 1 to 4, Comparative Examples 1 and 2] Using a water dissolving agent having the composition shown in the following [Table 1], a light oil lubricating test on diesel light oil was performed by the HFRR method (High).
Frequency Reciprocating R
ig method), and the wear scar diameter was determined. The results are shown in Table 1 below. The test was performed with n = 2, and the results are represented by the average value. The measurement conditions for this test are as follows:
(Other conditions not specifically shown are ISO
And JPI standards). Measurement device: HFR2 type (manufactured by PSC) Measurement temperature: 25.0 ± 0.1 ° C. Measurement humidity: 50 ± 4% Fuel temperature: 60.0 ° C.

[0023]

[Table 1]

As is clear from the results of the above [Table 1],
When the water-soluble agent of the present invention containing a lubricity improver is used (Examples 1 to 4), when a water-soluble agent not containing a lubricity improver is used (Comparative Examples 1 and 2) It can be seen that the wear scar diameter appears smaller than in the case of the oil or gas oil blank (Reference Example 1), that is, the lubrication performance of the gas oil is improved.

Example 5 and Comparative Example 3 A water dissolving agent having the same composition as the water dissolving agent used in Example 2 was prepared using low sulfur gas oil [sulfur content: 0.05% by weight, LS gas oil No. 2 (manufactured by N Company) Example 2) A light oil lubricity test was conducted in the case where 0.4% by volume of
And the wear scar diameter was determined (Example 5). Also,
A similar test was performed using a water-soluble agent having the same composition as the water-soluble agent used in Comparative Example 1 (Comparative Example 3). Further, the same test was conducted in the case where no water dissolving agent was used (Reference Example 2).

Further, a saturated water solubility test using these water dissolving agents was performed according to the following test method, and the water drainage performance was evaluated. (Saturated water solubility test method) 200 ml of light oil No. 2 stipulated in JIS-K-2204 was weighed and placed in a common tumbling Erlenmeyer flask, 20 ml of water was added thereto, and the center vortex was stirred from above with a stirrer using a stirrer. 3 so that it is about 1cm
Stir for 0 ± 5 minutes and use a thermostat at 20 ± 2 ° C. for 24 ±
After allowing to stand for 2 hours, the supernatant is used as water-saturated light oil, and the water content of this liquid is measured by Karl Fischer (micro moisture measuring device). Next, (1) 50 ml of the above water-saturated light oil was prepared using a pipette, and the water dissolving agent was added using a pipette.
3 ml and 0.1 ml of water are filled with a measuring cylinder with stopper 100
After shaking up and down 100 times, the mixture is allowed to stand in a thermostat at 20 ± 2 ° C. for 24 ± 2 hours. (2) Karl Fischer (micro moisture analyzer)
And this is taken as the water content of the light oil / water dissolving agent mixture. These operations (1) and (2) are repeated. Thereafter, two measured values of the water content are calculated by the following equation (1), and the average value is rounded to the order of 1 ppm. However, if the difference between the two measured values exceeds 5 ppm, the test is repeated only once. If the difference is less than 5 ppm from any of the previous measured values, the average value is taken. If any of the previous measurements differ by more than 5 ppm, check the equipment and instruments and repeat the test. ("P" used here
"pm" is by weight. W = W ₂ −W ₁ (1) [W: Saturated water solubility (ppm), W ₁ : Water of water saturated gas oil (ppm), W ₂ : Water (ppm) of light oil / water dissolving agent mixture]

The results are shown in Table 2 below.

[0028]

[Table 2]

As is clear from the results of the above [Table 2],
In the case where the water-soluble agent of the present invention containing a lubricity improver was used (Example 5), the case where a water-soluble agent not containing a lubricity improver was used (Comparative Example 3) or in the case of a light oil blank was used. Compared with the case (Reference Example 2), the lubricating performance of light oil is improved, and the water dissolving agent of Example 5 has a water draining property (saturated water solubility) which is an original property of the water dissolving agent. It can also be seen that this also shows an excellent effect.

Example 6 Water saturated light oil No. 2 (sulfur content: 0.
0.2% water dissolving agent in 50 ml
and 0.1 ml of water were added, and the rust prevention test (room temperature x 7 days) for metals shown in the following [Table 3] was carried out according to JIS-K-2
395 (Example 4). Further, a rust prevention test using only water-saturated light oil No. 2 was performed in the same manner (Reference Example 3). The results are shown in Table 3 below. The composition of the water dissolving agent used here is as follows. (Water dissolving agent)-Lubricity improver; amine compound (Hitec 4848, manufactured by Ethyl Corporation) ... 1.0 part-Rust inhibitor: amine salt of benzotriazole (Tiolite B1051F, manufactured by Chiyoda Chemical Co., Ltd.) … 0.5 part ・ Main agent: mixture of isopropyl alcohol and isobutanol (= 70: 30, volume ratio) ・ ・ ・ 98.5 parts The metal used was the sliding part of the fuel pump of diesel vehicles. As a representative of metal, steel (JIS G 3141, S
PCC-B), and copper (JIS H 3100, C110P) as a material for the pipe system, and aluminum silicon plating for fuel tanks and housing for fuel pumps. Then, aluminum (JIS H5202, ACZA-F) was selected.

[0031]

[Table 3]

As is clear from the results of the above [Table 3],
It can be seen that the use of the water dissolving agent of the present invention (Example 6) is superior to the case of light oil blank (Reference Example 3) in the rust-preventive effect on steel, copper and aluminum. .

[Examples 7 to 11 and Comparative Examples 4 to 9] With respect to the water dissolving agent having the composition shown in the following [Table 4], the ratio of the lubricity improver and the main agent respectively to the following [Table 4] (based on light oil) LS light oil No. 2 was added. A lubricity test at this time was performed in the same manner as in Example 1, and the wear scar diameter was determined. The results are shown in Table 4 below. Similarly, when a water dissolving agent consisting only of a solvent component was used, an amount having a ratio shown in the following [Table 5] was added to LS gas oil No. 2, and the same test was performed. Further, the same test was performed when no water dissolving agent was used. The results are shown in Table 5 below.

[0034]

[Table 4]

[0035]

[Table 5]

As is clear from the results of the above [Table 5],
In the case of using the water-soluble agent of the present invention containing a lubricity improver (Examples 7 to 11), in the case of adding only a solvent (Comparative Examples 4 to 9) and in the case of a light oil blank (Reference Example 4). It can be seen that the lubricating performance of light oil is improved in comparison. In particular, when a mixture of isopropyl alcohol and isobutanol is used as a solvent component, the lubricity improver is 40% less than light oil.
When a water dissolving agent was added so as to have a capacity of ppm (Example 7), when no lubricity improver was added (Comparative Example 7)
The lubricating performance of light oil is improved as compared with that of Example 1. Further, when a water dissolving agent is added so that the lubricity improver becomes 80 ppm by volume with respect to light oil (Example 8), It can be seen that the performance is further improved. Similarly, when a mixture of isopropyl alcohol and butyl cellosolve is used as the solvent component, the lubricity improver is 80 vol.
It can be seen that the lubricating performance of light oil is improved when the water-soluble agent is added so as to obtain m (Example 9), as compared with when the lubricity improver is not added (Comparative Example 8). . Similarly, when a mixture of isobutanol and butyl cellosolve is used as the solvent component, the lubricity improver is 100 ppm by volume (amine compound) or 300 vol.
m (fatty acid ester) when the water-soluble agent was added (Examples 10 and 11), the lubricating performance of light oil was considerably higher than when the lubricity improver was not added (Comparative Example 9). You can see that it has improved. Thus, Examples 7 to 11
The lubricating performance of the gas oil was improved when using the water dissolving agent of the present invention, as compared with the case of the light oil blank (light oil practically used) (Reference Example 4). Obviously, the effect of improving the lubricating performance of the steel is exhibited, and it is practically practical.

[0037]

The water-soluble agent for diesel gas oil of the present invention comprises:
It has excellent water drainage properties and can improve the lubricating performance of light oil even when used for LS light oil. In addition, the water dissolving agent for diesel light oil of the present invention has an excellent rust-preventing effect on metals by including a rust-preventive agent.

Claims (6)

[Claims] 1. A water dissolving agent for diesel light oil, comprising a lubricity improver. 2. The water-soluble agent for diesel light oil according to claim 1, wherein the lubricity improver is a monofatty acid, a fatty acid ester or an amine compound. 3. The water dissolving agent for diesel light oil according to claim 2, wherein the lubricity improver is an amine compound. 4. The content of the lubricity improver is 0.001 to 10 parts by volume based on 100 parts by volume of the water dissolving agent.
4. The water dissolving agent for diesel light oil according to any one of claims 1 to 3. 5. The water dissolving agent for diesel light oil according to claim 1, further comprising a rust preventive in an amount of 0.1 to 1.0 part by volume based on 100 parts by volume of the water dissolving agent. 6. The water dissolving agent for diesel gas oil according to claim 5, wherein the rust inhibitor is an amine salt of benzotriazole.