KR102230743B1 - Gel-type alcohol fuel composition with increased stability at low temperature - Google Patents

Abstract

The present invention relates to a gel-type alcohol fuel composition with improved low-temperature stability. In the present invention, (a) 70 to 99 parts by weight of an alcohol composition comprising 90 to 99.5% by weight of ethanol and 0.5 to 10% by weight of alcohol mixture A or alcohol mixture B; (b) 0 to 30 parts by weight of water; (c) 0.5 to 3 parts by weight of a carboxyvinyl polymer; (d) 0.5 to 6 parts by weight of alkanol amine; And (e) 1 to 10 parts by weight of an additive for improving low-temperature stability selected from one or more alcohols having 1 to 3 carbon atoms and glycols having 2 to 3 carbon atoms. The gel-type alcohol fuel composition with improved low-temperature stability of the present invention increases hydrogen bonding power by adding alcohols having 1 to 3 carbon atoms or glycols having 2 to 3 carbon atoms to the gel-type alcohol fuel composition containing ethanol as a main component, so that the viscosity is stable at low temperatures. Can be maintained.

Description

Gel-type alcohol fuel composition with increased stability at low temperature}

The present invention relates to a gel-type alcohol fuel composition with improved low-temperature stability, and more specifically, by adding alcohols having 1 to 3 carbon atoms or glycols having 2 to 3 carbon atoms to a gel-type alcohol fuel composition using ethanol as the main raw material. It is about a gel-type alcohol fuel composition that can stably maintain the viscosity of.

Conventional alcohol fuels have various problems, such as generating toxic gases due to strong volatility, low storage stability, short combustion duration, and high risk of fire due to careless handling during combustion because they are liquid.

Paraffin-based solid fuels are used to replace these liquid alcohol fuels, but paraffin-based solid fuels also have a high risk of fire, such as liquid alcohol, and have no fluidity when some of the components are liquefied during combustion. Therefore, there is a problem that its use is limited.

Gel-type alcohol fuel, which is gelled with alcohol, has fluidity compared to solid fuels, but has low fluidity compared to liquid fuels.Therefore, fuel does not easily leak out even if the container is damaged or spilled due to careless handling, so it has the advantage of low risk of fire. . Therefore, gel-type alcohol fuels are widely used because they can improve to some extent the problems with conventional liquid fuels or solid fuels.

However, in the conventional gel-type alcohol fuel, methanol, which is inexpensive, is mainly used, and methanol itself is a toxic substance, and there is a problem in that harmful substances such as methane acid (formic acid) are generated during combustion. In addition, methanol has a low molecular weight, low calorific value, and relatively short combustion time.

In order to increase the amount of heat in a gel fuel mainly composed of methanol, a method of mixing an alcohol having a high combustion heat of 2 or more carbon atoms has been proposed. However, when an alcohol having 2 or more carbon atoms is mixed with methanol, when a simple alkylamine having a low molecular weight is used as a neutralizing thickener, there is a problem in that the gel-forming ability is poor and a part of the resulting gel is destroyed at high temperature. In addition, when the gel-forming ability is poor, the amount of the thickener is increased and other additives are used, resulting in an increase in cost.

Due to this problem, studies are being conducted to use ethanol instead of methanol as a main component of a gel-type alcohol fuel. However, methanol can be used as a fuel stably even in winter due to little change in viscosity depending on temperature, whereas ethanol has a freezing point of -114.1°C, but below -10°C, the hydrogen bonding power of water and ethanol is weakened and the viscosity is lowered, causing the gel to loosen. There is a problem in that there is a change in physical properties.

For example, in the case of a gel-type alcohol fuel using methanol as a raw material, the viscosity at room temperature is 51,200 and at -10°C or less, the viscosity is 57,000, the difference in viscosity is 5,800, and the viscosity increases as the temperature decreases. On the other hand, in the case of a gel-type alcohol fuel using ethanol as a raw material, the viscosity at room temperature was 57,640, and at less than -10°C, the viscosity decreased sharply as the temperature decreased to 9,500, resulting in a difference in viscosity of 48,140.

In addition, in the case of a gel-type alcohol fuel using ethanol as a raw material, a high-viscosity transparent gel is maintained at room temperature (Fig. 1), but below -10°C, the gel becomes opaque, and the partially added polymer mass can be visually confirmed ( Fig. 2).

(Patent Literature　1)　Korean Patent Notice　No. 1993-0010572 2)　Korea　Patent registration　No. 10-0156372 (Patent Literature　3)　Korea Patent Registration　No. 10-0738811 (Patent Literature　4)　Korea　Patent Registration　No. 10-0789586 (Patent Literature　5)　Korea　Patent Registration　No. 10-1111442 (Patent Literature　6)　Korea　Patent Registration　No. 10-1315993 (Patent Literature　7)　Korea　Patent Registration　No. 10-1535603

The present invention provides a gel-type alcohol fuel composition with improved low-temperature stability capable of stably maintaining physical properties even at low temperatures by adding alcohols having 1 to 3 carbon atoms or glycols having 2 to 3 carbon atoms to a gel-type alcohol fuel composition containing ethanol as a main component. It is aimed at.

In order to achieve the above object, in the present invention,

(a) 70 to 99 parts by weight of an alcohol composition comprising 90 to 99.5% by weight of ethanol and 0.5 to 10% by weight of an alcohol mixture A or an alcohol mixture B;

(b) 0 to 30 parts by weight of water;

(c) 0.5 to 3 parts by weight of a carboxyvinyl polymer;

(d) 0.5 to 6 parts by weight of alkanol amine; And

(e) 1 to 10 parts by weight of an additive for improving low-temperature stability selected from one or more alcohols having 1 to 3 carbon atoms and glycols having 2 to 3 carbon atoms;

It provides a gel-type alcohol fuel composition comprising, low-temperature stability is improved.

The alcohol mixture A is a mixture of a mixed alcohol having 3 or more carbon atoms, water and methanol, and the mixed alcohol having 3 or more carbon atoms is propyl alcohol (5-25% by weight), butyl alcohol (15-25% by weight), and amyl alcohol. It is an alcohol mixture containing (60 to 70% by weight).

The alcohol mixture B is an alcohol mixture containing water, methanol and fusel oil.

In the composition, the alcohols having 1 to 3 carbon atoms are preferably methanol.

In the composition, the glycols having 2 to 3 carbon atoms are preferably selected from ethylene glycol and glycerin.

In the composition, the alkanol amine is preferably one or a mixture of two or more selected from amines containing a hydroxy group in an alkyl group having 2 to 14 carbon atoms.

In the composition, the carboxyvinyl polymer is a polymer having a molecular weight in the range of 900,000 to 4,500,000, and is preferably a polyacrylic acid copolymer or a cross-polymer.

In the composition, the alkanol amine is preferably contained in an amount of 70 to 200 parts by weight based on 100 parts by weight of the carboxyvinyl polymer.

In the composition, the alcohol composition preferably contains 90% by weight or more of crude ethanol.

In the composition, the crude ethanol is preferably obtained in the process of producing ethanol by fermenting at least one raw material of starchy, woody and algae biomass.

The composition may further include one or more of a colorant, a fragrance, a deodorant and a deodorant as an additive.

The composition may further contain 5 to 30 parts by weight of at least one organic solvent selected from methanol, propanol, butanol, acetone, hexane, and methyl ethyl ketone.

In addition, 50 to 95% by weight of the gel-type alcohol fuel composition;

It provides an alcohol mixed fuel comprising 5 to 50% by weight of a solid fuel having at least one selected from charcoal, rice husk, wood, petro-coke, coal, graphite, and lignite and having a shape of at least one of powdery, granular and bulky forms.

The gel-type alcohol fuel composition with improved low-temperature stability of the present invention increases hydrogen bonding power by adding alcohols having 1 to 3 carbon atoms or glycols having 2 to 3 carbon atoms to the gel-type alcohol fuel composition containing ethanol as a main component, so that the viscosity is stable at low temperatures. As it is maintained, safe ethanol fuel can be used stably even at low temperatures.

1 is a photograph showing a state at room temperature of a gel-type alcohol fuel using ethanol as a raw material.
2 is a photograph showing a state of gel-type alcohol fuel using ethanol as a raw material at -10°C or less.

The gel-type alcohol fuel composition with improved low-temperature stability of the present invention,

(a) 70 to 99 parts by weight of an alcohol composition comprising 90 to 99.5% by weight of ethanol and 0.5 to 10% by weight of an alcohol mixture A or an alcohol mixture B;

(b) 0 to 30 parts by weight of water;

(c) 0.5 to 3 parts by weight of a carboxyvinyl polymer;

(d) 0.5 to 6 parts by weight of alkanol amine; And

(e) 1 to 10 parts by weight of an additive for improving low-temperature stability selected from one or more alcohols having 1 to 3 carbon atoms and glycols having 2 to 3 carbon atoms.

Hereinafter, the present invention will be described in detail.

1. Alcohol composition

The alcohol composition includes 90 to 99.5% by weight of ethanol and 0.5 to 10% by weight of alcohol mixture A or alcohol mixture B.

Ethanol is generally produced by direct or indirect hydration of ethylene, or by fermentation of biomass such as grains, woods, and seaweed.

Biomass through pretreatment-saccharification-fermentation tablets using sugar cane, corn, potato, sweet potato, etc. of grains or Starchy, or lignocellulosic biomass of wood such as rice straw and wood as raw materials. In the case of producing ethanol, the content of ethanol in the broth obtained first after fermentation is very low, at a level of 5 to 10% by weight due to the high content of water in the fermentation tank.

Ethanol as a final product requires a high purity of 95 to 99.5% by weight or more depending on the purpose, and thus undergoes several steps of purification for commercialization.

Ethanol produced through the fermentation process is obtained through the first separation (purification) process after fermentation to obtain Crude ethanol with an ethanol content of about 95%, and this crude ethanol contains ethanol and various by-products.

In the present invention, "crude ethanol" is defined as crude ethanol having an ethanol content of about 95% and including various by-products obtained in the middle of the process of producing ethanol by biomass fermentation. Such crude ethanol does not go through a separate and complicated purification process, so its price is very cheap compared to commercialized ethanol that has undergone a purification process, but it is not well used due to the by-products contained therein.

Since crude ethanol contains alcohol having 3 or more carbon atoms as a by-product and a trace amount of methanol, etc., if the alcohol composition of the present invention is prepared by using it, it is economical because the cost is low while using ethanol as a main component.

Crude ethanol may be used in an amount of 90 to 100% by weight in the alcohol composition of the present invention depending on the state, and insufficient components may be added as necessary.

It is preferable to use the crude ethanol obtained in the process of producing ethanol by fermenting at least one raw material of starchy, woody and algae-based biomass.

The alcohol mixture A is a mixture of alcohol, water and methanol having 3 or more carbon atoms, and the alcohol mixture B is an alcohol mixture containing water, methanol and fusel oil. The alcohol mixture A preferably contains 0.5 to 90% by weight of a mixed alcohol having 3 or more carbon atoms, 0.5 to 90% by weight of water, and 50 to 99% by weight of methanol. The alcohol mixture B preferably contains 0.5 to 90% by weight of water, 50 to 99% by weight of methanol, and 0.5 to 90% by weight of fusel oil.

The mixed alcohol having 3 or more carbon atoms preferably includes 5 to 25% by weight of propyl alcohols, 15 to 25% by weight of butyl alcohols, and 60 to 70% by weight of amyl alcohols. Propyl alcohols include all alcohols having 3 carbon atoms such as normal propanol and isopropanol, butyl alcohols include all alcohols having 4 carbon atoms such as normal butanol and isobutanol, and amyl alcohols include normal pentanol and isopentanol. It means including all 5 alcohols.

2. water

Water forms and maintains the shape of a gel, and is used to control viscosity and burning rate.

Water is preferably 0 to 30 parts by weight, and more preferably 10 to 30 parts by weight, based on 70 to 99 parts by weight of the alcohol composition.

If the amount of water is too large, the content of alcohol is relatively reduced, and thus the calorific value may be reduced. In addition, if the amount of water is too small, there is a problem that it is difficult to maintain the shape of the gel because it affects gelation, but in the present invention, an alkanol amine compound is used as a neutralizing thickener, so that even if the amount of water is included in an amount of 5 parts by weight or less, a suitable viscosity and gel It can maintain its shape, and even if it does not contain water at all, it can maintain its gel shape.

3. Carboxyvinyl Polymer

Carboxylvinyl polymer is a basic material that reacts with amines in a gel fuel to form a final gel.

Carboxyvinyl polymer is dispersed in alcohol, water, or a mixture of alcohol and water to increase the viscosity and act as a gelling agent to form a gel. It plays an important role.

As the carboxyvinyl polymer, it is preferable to use a polyacrylic acid copolymer or a cross-polymer as a polymer having a molecular weight in the range of 900,000 to 4,500,000.

It is preferable to use 0.5 to 3 parts by weight of the carboxyvinyl polymer based on 70 to 99 parts by weight of the alcohol composition.If the content of the carboxyvinyl polymer is too low, the flow of the gel-type fuel may be high, making it difficult to form a gel. If this is too high, a gel of too high viscosity may be formed or impurities may be generated during combustion.

4. Alkanol Amine

Alkanol amine is a neutralizing thickener that forms a gel by neutralizing a carboxy group of a carboxyvinyl polymer in an alcohol fuel composition.

As the alkanol amine, it is preferable to use one or a mixture of two or more selected from alkanol amines containing a hydroxy group in an alkyl group having 2 to 14 carbon atoms, and examples of such amines are monoethanol amine, diethanol amine, triethanol Amine, triisopropanol amine, and the like, but are not limited thereto.

As the alkanol amine, it is more preferable to use a tertiary amine containing a hydroxy group in a branched alkyl group having 8 to 14 carbon atoms, and the tertiary amine containing a hydroxy group in a branched alkyl group having 8 to 14 carbon atoms has a molecular size. Because it is small, there is no steric hindrance when neutralizing the carboxy group of the carboxyvinyl polymer, so that the neutralization reaction can be performed efficiently, so the amount of use is reduced compared to the compound having a large molecular size. In addition, the gel formation produced after the neutralization reaction is efficiently dispersed due to the branched alkyl group, and the hydroxy group interacts with the alcohol, thereby lowering the volatility of the alcohol and maintaining long-term stability.

The alkanol amine compound is more preferably one or a mixture of two or more selected from the compounds represented by the following formulas 1 to 5.

The alkanol amine is preferably used in an amount of 0.5 to 6 parts by weight based on 70 to 99 parts by weight of the alcohol composition, and more preferably 80 to 180 parts by weight based on 100 parts by weight of the carboxyvinyl polymer. If the amount of alkanol amine in the composition is too small, it is difficult not only to form a gel, but also because the gel-type alcohol fuel becomes acidic, long-term preservation is poor and the metal container is corroded. The use of alkanol amines has the disadvantage of increasing residuals during combustion.

5. Alcohols and glycols

The gel-type alcohol fuel composition having improved low-temperature stability of the present invention includes alcohols having 1 to 3 carbon atoms or glycols having 2 to 3 carbon atoms in order to increase the stability of the gel-type alcohol fuel composition at low temperatures.

In general, the alkyl group has an inductive effect of distributing electrons to carbon having a relatively positive charge in order to stabilize the molecule. In both methanol and ethanol, the carbon bonded to the oxygen atom is partially positively charged, but in ethanol, the carbon atom bonded to the oxygen atom is bonded to another carbon atom, and polarization occurs less due to the inducing effect, so hydrogen bonding power at low temperatures decreases. .

In other words, in the case of methanol, which is the main component used in the _{past, -OH is connected to the methyl group (CH 3} -), so the steric hindrance caused by the alkyl group during hydrogen bonding is low, so the hydrogen bonding power with water is high and stability even at low temperatures. However, ethanol suffers from steric hindrance due to an alkyl group during hydrogen bonding because one -OH is connected to the ethyl group (CH ₃ CH _{2 -), so the hydrogen bonding power is lowered and the low-temperature stability is lowered.}

Therefore, in the present invention, by using one or two or more selected from among alcohols having 1 to 3 carbon atoms and glycols having 2 to 3 carbon atoms with a small number of carbon atoms and a large number of hydroxy groups, it is intended to increase the hydrogen bonding power to stably maintain physical properties at low temperatures. do. The alcohols having 1 to 3 carbon atoms are preferably methanol. The glycols having 2 to 3 carbon atoms are preferably selected from ethylene glycol and glycerin, and ethylene glycol may be particularly preferably used.

The gel-type alcohol fuel composition having improved low-temperature stability of the present invention prepared as described above preferably has a pH value of 6 to 9.

The gel-type alcohol fuel composition of the present invention may further include additives such as colorants, fragrances, deodorants, and deodorants.

As the colorant, an aromatic compound having a boiling point of 220° C. or lower under normal pressure is usually used, and examples of the colorant include alkylbenzenes such as toluene, xylene, and trimethylbenzene; Phenyl ethers such as methoxy benzene and ethoxy benzene; And esters such as methyl benzoate and phenyl acetate. The colorant allows the flame to have a color when the gel-type alcohol fuel is burned, so that the progress of the combustion can be easily checked. The colorant is preferably contained in an amount of 0.0001 to 0.005% by weight in the gel-type alcohol fuel composition. If the content of the colorant is too small, the coloration effect is insignificant, and if too much, the combustion efficiency may decrease.

Additives such as a fragrance, a deodorant, and a deodorant may be used according to the amount of known ingredients known in the art. It is preferable that the fragrance, the deodorant, and the deodorant are contained in an amount of 0.0001 to 0.005% by weight in the gel-type alcohol fuel composition, respectively.

The gel-type alcohol fuel composition with improved low-temperature stability of the present invention prepares a dispersion by mixing and stirring 70 to 99 parts by weight of an alcohol composition, 0 to 26 parts by weight of water, and 0.5 to 3 parts by weight of a carboxyvinyl polymer, and water 0 to the dispersion is 4 parts by weight, 0.5 to 6 parts by weight of an alkanolamine, and one or two or more mixtures selected from alcohols having 1 to 3 carbon atoms and glycols having 2 to 3 carbon atoms are mixed and stirred to prepare a gel-type alcohol fuel composition, It is preferable that the prepared gel-type alcohol fuel composition is injected into a container using a filler and sealed into a gel-type fuel.

When using a colorant as an additional component, 70 to 99 parts by weight of an alcohol composition, 0 to 26 parts by weight of water, 0.5 to 3 parts by weight of carboxyvinyl polymer are mixed and stirred to prepare a dispersion, and 0.0001 to 0.005 parts by weight of the dispersion is Mixing and stirring the colorant to obtain a dispersion, and in the dispersion is one or two selected from 0 to 4 parts by weight of water, 0.5 to 6 parts by weight of alkanolamine, alcohols having 1 to 3 carbon atoms, and glycols having 2 to 3 carbon atoms It is preferable that a gel-type alcohol fuel composition is prepared by mixing and stirring a mixture of more than one kind, and the gel-type alcohol fuel composition is injected into a container using a filler and sealed into a gel-type fuel.

In the present invention, there is provided an alcohol mixed fuel including a gel-type alcohol fuel composition and a solid fuel composed as described above. The alcohol mixed fuel is preferably 50 to 95% by weight of a gel-type alcohol fuel composition; It contains 5 to 50% by weight of solid fuel such as charcoal. The solid fuel is preferably at least one selected from charcoal, rice husk, wood, petroleum coke, coal, graphite, and lignite, and preferably has a shape of at least one of powdery, granular and bulky forms. The mixed solid fuel can function to increase the heat generation time and the amount of heat generation.

[ Example ]

The present invention will be described in more detail through the following examples. The following examples are illustrative of the present invention and the scope of the present invention is not limited thereto.

< Example 1>

A mixed alcohol having 3 or more carbon atoms, water and methanol including 96.5 parts by weight of ethanol, propyl alcohols (5 to 25% by weight), butyl alcohols (15 to 25% by weight) and amyl alcohols (60 to 70% by weight) An alcohol composition containing 3.5 parts by weight was prepared.

To 75.70 parts by weight of the alcohol composition, 21.64 parts by weight of water, 0.77 parts by weight of carboxyvinyl polymer, 0.89 parts by weight of alkanol amine, and 1 part by weight of methanol were mixed to prepare a gel-type alcohol fuel composition.

Carbomer 940 was used as the carboxyvinyl polymer, and the compound of Formula 1 [(2-hydroxyethyl)-bis-(2-hydroxypropyl)amine] was used as the amine compound. Methanol was used as an additive to increase low-temperature stability.

<Example 2>

The alcohol composition, the carboxyvinyl polymer, and the amine compound were the same materials as in Example 1, and methanol was used as an additive to increase low-temperature stability.

74.17 parts by weight of an alcohol composition, 21.20 parts by weight of water, 0.76 parts by weight of carboxyvinyl polymer, 0.87 parts by weight of alkanol amine, and 3 parts by weight of methanol were mixed to prepare a gel-type alcohol fuel composition.

< Example 3>

The alcohol composition, the carboxyvinyl polymer, and the amine compound were the same materials as in Example 1, and methanol was used as an additive to increase low-temperature stability.

A gel-type alcohol fuel composition was prepared by mixing 72.64 parts by weight of an alcohol composition, 20.77 parts by weight of water, 0.74 parts by weight of carboxyvinyl polymer, 0.86 parts by weight of alkanol amine, and 5 parts by weight of methanol.

<Example 4>

The alcohol composition, the carboxyvinyl polymer, and the amine compound were the same materials as in Example 1, and methanol was used as an additive to increase low-temperature stability.

71.17 parts by weight of an alcohol composition, 17.49 parts by weight of water, 0.62 parts by weight of a carboxyvinyl polymer, 0.72 parts by weight of an alkanol amine, and 10 parts by weight of methanol were mixed to prepare a gel-type alcohol fuel composition.

<Example 5>

The alcohol composition, carboxyvinyl polymer, and amine compound were the same materials as in Example 1, and ethylene glycol (EG) was used as an additive for improving low-temperature stability.

75.70 parts by weight of an alcohol composition, 21.64 parts by weight of water, 0.77 parts by weight of a carboxyvinyl polymer, 0.89 parts by weight of an alkanol amine, and 1 part by weight of ethylene glycol were mixed to prepare a gel-type alcohol fuel composition.

<Example 6>

The alcohol composition, the carboxyvinyl polymer, and the amine compound were the same materials as in Example 1, and ethylene glycol was used as an additive to increase low-temperature stability.

74.17 parts by weight of an alcohol composition, 21.20 parts by weight of water, 0.76 parts by weight of carboxyvinyl polymer, 0.87 parts by weight of alkanol amine, and 3 parts by weight of ethylene glycol were mixed to prepare a gel-type alcohol fuel composition.

<Example 7>

The alcohol composition, the carboxyvinyl polymer, and the amine compound were the same materials as in Example 1, and ethylene glycol was used as an additive to increase low-temperature stability.

A gel-type alcohol fuel composition was prepared by mixing 72.64 parts by weight of an alcohol composition, 20.77 parts by weight of water, 0.74 parts by weight of carboxyvinyl polymer, 0.86 parts by weight of alkanol amine, and 5 parts by weight of ethylene glycol.

<Example 8>

The alcohol composition, the carboxyvinyl polymer, and the amine compound were the same materials as in Example 1, and ethylene glycol was used as an additive to increase low-temperature stability.

71.17 parts by weight of an alcohol composition, 17.49 parts by weight of water, 0.62 parts by weight of a carboxyvinyl polymer, 0.72 parts by weight of an alkanol amine, and 10 parts by weight of ethylene glycol were mixed to prepare a gel-type alcohol fuel composition.

<Comparative Example 1>

The alcohol composition, carboxyvinyl polymer, and amine compound were the same materials as in Example 1.

76.46 parts by weight of an alcohol composition, 21.86 parts by weight of water, 0.78 parts by weight of a carboxyvinyl polymer, and 0.9 parts by weight of an alkanol amine were mixed to prepare a gel-type alcohol fuel composition.

<Experimental Example 1>

Changes in physical properties at low temperature depending on the content of methanol

The viscosity of the compositions of Comparative Example 1 and Examples 1 to 4 were measured at room temperature and at -10°C or less, and are shown in Table 1 below. For viscosity measurement, a viscometer of the DV2TLVTJ0 model of BROOKFIELD was used. First, turn on the power of the device, set the zero point, and input the setting value (Spindle64, rpm5) to be measured. When the input is complete, the sample to be measured is put up to the boundary of the spindle and the measurement is started.

Furtherance Methanol content Viscosity ethanol
Composition water Carboxyvinyl polymer Alkanol
Amine Room temperature
(a) -10℃ or less
(b) Difference
(ab) Comparative Example 1 76.46 21.86 0.78 0.9 - 57,640 4,160 53,480 Example 1 75.70 21.64 0.77 0.89 One 62,500 43,320 19,180 Example 2 74.17 21.20 0.76 0.87 3 75,280 78,040 -2,760 Example 3 72.64 20.77 0.74 0.86 5 76,360 76,500 -140 Example 4 71.17 17.49 0.62 0.72 10 56,920 54,500 2,420

In the results of Table 1, in the case of Comparative Example 1 in which methanol was not added and in Example 1 in which a small amount of methanol was added, the viscosity was resolved, but in Examples 2 to 4, the viscosity was not resolved and maintained stably even at low temperatures. Can be confirmed.

< Experimental example 2>

Changes in properties at low temperature depending on the content of ethylene glycol

The viscosity of the compositions of Comparative Example 1 and Examples 5 to 8 were measured at room temperature and at -10°C or less, and are shown in Table 2 below. The viscosity measurement method is the same as in Experimental Example 1.

Furtherance EG
content Viscosity ethanol
Composition water Carboxyvinyl polymer Alkanol
Amine Room temperature
(a) -10℃ or less
(b) Difference
(ab) Comparative Example 1 76.46 21.86 0.78 0.9 - 57,640 4,160 53,480 Example 1 75.70 21.64 0.77 0.89 One 55,880 69,760 -13,880 Example 2 74.17 21.20 0.76 0.87 3 74,200 78,200 -4,000 Example 3 72.64 20.77 0.74 0.86 5 55,840 61,000 -5,160 Example 4 71.17 17.49 0.62 0.72 10 60,640 72,400 -11,760

From the results of Table 2, it can be seen that when ethylene glycol is used as an additive, the viscosity is stably maintained at low temperatures even when only a small amount is added.

Claims (11)

(a) 70 to 99 parts by weight of an alcohol composition comprising 90 to 99.5% by weight of ethanol and 0.5 to 10% by weight of the following alcohol mixture A or alcohol mixture B;
(b) 0 to 30 parts by weight of water;
(c) 0.5 to 3 parts by weight of a carboxyvinyl polymer;
(d) 0.5 to 6 parts by weight of alkanol amine; And
(e) 1 to 10 parts by weight of an additive selected from methanol, ethylene glycol, and glycerin for improving low-temperature stability,
The alcohol composition is a gel-type alcohol fuel composition having improved low-temperature stability at -10°C or less, characterized in that it contains 90% by weight or more of the total weight of the alcohol composition as crude ethanol.
A: A mixed alcohol having 3 or more carbon atoms, a mixture of water and methanol, and the mixed alcohol having 3 or more carbon atoms is propyl alcohol (5-25% by weight), butyl alcohol (15-25% by weight), and amyl alcohol (60- Alcohol mixture containing 70% by weight)
B: Alcohol mixture containing water, methanol and fusel oil delete delete The method of claim 1,
The alkanol amine is a gel-type alcohol fuel composition having improved low-temperature stability, characterized in that it is a mixture of one or two or more selected from amines containing a hydroxy group in an alkyl group having 2 to 14 carbon atoms. The method of claim 1,
The carboxyvinyl polymer is a polymer having a molecular weight in the range of 900,000 to 4,500,000 and is a copolymer or cross-polymer of polyacrylic acid, characterized in that, low-temperature stability is improved gel-type alcohol fuel composition. The method of claim 1,
The alkanol amine is characterized in that it contains 70 to 200 parts by weight based on 100 parts by weight of the carboxyvinyl polymer, gel-type alcohol fuel composition with improved low-temperature stability. delete The method of claim 1,
The crude ethanol, characterized in that obtained in the process of producing ethanol by fermenting at least one raw material of starchy, woody and algae-based biomass, gel-type alcohol fuel composition with improved low-temperature stability. The method of claim 1,
The composition further comprises one or more of a colorant, a fragrance, a deodorant and a deodorant as an additive, characterized in that, the low-temperature stability is improved gel-type alcohol fuel composition. The method of claim 1,
A gel-type alcohol fuel composition with improved low-temperature stability, further comprising 5 to 30 parts by weight of at least one organic solvent selected from methanol, propanol, butanol, acetone, hexane and methyl ethyl ketone. 50 to 95% by weight of the gel-type alcohol fuel composition of any one of claims 1, 4, 5, 6, 8, 9, and 10;
An alcohol mixed fuel comprising 5 to 50% by weight of a solid fuel having at least one selected from charcoal, rice husk, wood, petro-coke, coal, graphite, and lignite, and having a shape of at least one of powdery, granular and bulky forms.

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