JPH083573A - Heavy oil emulsion fuel composition - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a heavy oil emulsion fuel composition having good fluidity and excellent storage stability. [Structure] (a) Heavy oil, (b) Water, and (c) Polymerizable aromatic sulfonate as an essential monomer component, having a cross-linking structure and having a weight average molecular weight of 5000 to 500,000 anionic An oil-in-water heavy oil emulsion fuel composition containing a polymer or a copolymer as an essential component.

Description

Detailed Description of the Invention

[0001]

This invention relates to heavy oil emulsion fuel compositions. More specifically, it relates to a heavy oil emulsion fuel composition having good fluidity and excellent storage stability.

[0002]

2. Description of the Related Art In recent years,
Petroleum, which has been used most as a primary energy source, has reached the limit of its reserves and its price soaring, and development of alternative energy for petroleum is required.
On the other hand, interest in the global environment is increasing, and cleanliness of combustion exhaust gas is also increasing as a social demand.
Against this background, as a new fossil fuel, oil sand, bitumen, distillation residue of petroleum, and heavy oil such as asphalt are being considered as fuel. However, these heavy oils are usually vacuum distillation residues 420-45.
It is an oily substance containing about 60 to 70% by weight or more of a heavy fraction at 0 ° C or higher, and does not flow as it is or has a high viscosity of tens of thousands of centipoise or more. Therefore, in order to use it as a fuel, it is difficult to handle or atomize it unless it is heated to a high temperature of 280 to 300 ° C., and it is easy to cause clogging troubles in the piping of the combustion boiler, etc., and it is extremely difficult to use. An oil-in-water emulsion is effective as a method for imparting fluidity to such a highly viscous heavy oil even at room temperature.

As such an oil-in-water emulsion, a pitch water slurry composition using a nonionic surfactant is disclosed in JP-A-59-100193, but it has good storage stability. In order to obtain the product, a high amount of the nonionic surfactant was required, which was not sufficiently satisfactory. Further, JP-A-61-501754 discloses a heavy oil emulsion having good storage stability in which a water-soluble bioemulsifier is used in combination with a water-soluble surfactant, but it is difficult to supply the bioemulsifier and is economical. There is.

Further, JP-A-1-185394 and 1-203498.
No. 1-247492 No. 1-249892 No. 1-252697
No. 1, No. 1-313592, No. 1-313593, No. 1-313594
Issue 1-313595, Issue 3-97787, Issue 3-99786
No. 4, No. 4-20593, No. 4-20594 and No. 5-78678
Each of the publications discloses the composition of a heavy oil emulsion using various surfactants and stabilizers, but each of them has a drawback that a stable emulsion cannot be obtained unless the viscosity of the emulsion is considerably increased. . Therefore, there has been a demand for a heavy oil emulsion having good storage stability without increasing the viscosity of the emulsion so much.

[0005]

Means for Solving the Problems As a result of intensive studies for solving the above problems, the present inventors have found that the inclusion of a specific anionic polymer or copolymer as an essential component results in low viscosity, that is, fluidity. It has been found that a heavy oil emulsion composition having good storage stability and excellent storage stability can be obtained, and has completed the present invention. That is, the present invention is (a) heavy oil,
(b) Water, and (c) contains a polymerizable aromatic sulfonate as an essential monomer component and contains an anionic polymer or copolymer having a crosslinked structure and a weight average molecular weight of 5000 to 500,000 as an essential component. An oil-in-water type heavy oil emulsion fuel composition comprising:

The anionic polymer or copolymer (c) used in the present invention is a polymer having a crosslinked structure containing a polymerizable aromatic sulfonate as a monomer component. Particularly preferred as the anionic polymer or copolymer (c) is one or more selected from the group consisting of the following (a) and (b). (A) The polymerizable aromatic sulfonic acid or salt thereof and at least one cross-linking agent, and the amount of the cross-linking agent is from 0.1 to 10% of the total amount of the monomers.
Anionic copolymer obtained by copolymerization at a ratio of 10 mol%.

(B) A polymer or copolymer of a polymerizable aromatic hydrocarbon, which is sulfonated and neutralized. The weight average molecular weight of the polymer obtained by the sulfonation reaction is that of the raw material polymer before sulfonation. An anionic polymer or copolymer having a weight average molecular weight of 1.5 to 5 times.

As a method for producing the anionic copolymer of the group (a), radical polymerization, cationic polymerization or anionic polymerization using a usual initiator can be applied. For example, “Polymerization and Polycondensation Processes”
No34, Amer. Chem. Soc., Washington, 1962, P32 ~ 51
The described method can be applied. Specific examples of the polymerizable aromatic sulfonic acid or salt thereof used at this time include styrene sulfonic acid, α-methyl styrene sulfonic acid, vinyltoluene sulfonic acid, vinylnaphthalene sulfonic acid, and salts thereof. As a counter ion forming a salt, an alkali metal such as lithium, sodium or potassium, an alkaline earth metal such as magnesium, calcium or barium, or a lower amine such as ammonia, monoethanolamine, diethanolamine, triethanolamine or triethylamine is used. it can. Of these, sodium and calcium are preferable.

Examples of the cross-linking agent used for forming a cross-linking structure include divinylbenzene, methylenebisacrylamide, ethylene glycol dimethacrylate, polyethylene glycol dimethacrylate, trimethylolpropane dimethacrylate, trimethylolpropane trimethacrylate and diallyl phthalate. It can be illustrated. The cross-linking agent is 0.1 to 1 of the total monomers constituting the copolymer.
It is preferable to use 0 mol%, preferably 0.5 to 3 mol%. 0.
If it is less than 1 mol%, the effect of the present invention cannot be obtained. If it exceeds 10 mol%, it becomes a water-insoluble polymer and cannot be used.

As other monomer components, the following
You may copolymerize the copolymerizable compound shown to. Aliphatic carboxylic acids having a copolymerizable double bond and their ester derivatives, salts or anhydrides. Specific examples include acrylic acid, methacrylic acid, maleic acid, maleic anhydride, crotonic acid, isocrotonic acid, itaconic acid and their ester derivatives, salts or anhydrides. Aromatic hydrocarbon or heterocyclic compound having a copolymerizable double bond. Specific examples include styrene, indene, vinyltoluene, methylstyrene, N-vinylimidazole, N-vinylpyridine and N-vinylpyrrolidone. C3-C5 alcohols having a copolymerizable double bond and alkylene oxide adducts thereof. As specific examples, allyl alcohol, methacrylic alcohol, 2-
Examples thereof include buten-1-ol, 3-buten-1-ol, 3-buten-2-ol, 2-methyl-3-buten-2-ol and ethylene oxide and propylene oxide adducts thereof. Alkenes having 2 to 5 carbon atoms and dienes having 4 to 8 carbon atoms. Specific examples include ethylene, propylene, butene, pentene, butadiene and diisobutylene. These monomer components can be used in an amount of 0 to 50 mol% of the total monomers constituting the copolymer. When it is more than 50 mol%, it becomes difficult to produce the stable emulsion of the present invention.

In order to produce the anionic polymer or copolymer of the above group (b), an aromatic hydrocarbon having a polymerizable double bond is added to the conventionally known radical polymerization, cationic polymerization or anion. After polymerization by polymerization, it is sulfonated with a conventionally known sulfonating agent. As the sulfonating agent, chlorosulfonic acid, liquid SO ₃ , SO ₃ gas, fuming sulfuric acid, SO ₃ complex and the like can be used. Examples of the aromatic hydrocarbon having a polymerizable double bond include styrene, α-methylstyrene, methyl-substituted styrene, vinyltoluene, vinylnaphthalene, methyl-substituted vinylnaphthalene and the like.

[0012] Generally, during the sulfonation reaction, SO ₂ crosslinks are formed in the polymer molecules or between the molecules. The degree of SO ₂ crosslinking varies with the sulfonation conditions. For example SO ₂ /
Various degrees of crosslinking can be obtained depending on the molar ratio of the polymer to be sulfonated, the sulfonation reaction temperature, the amount of water, and the stirring speed. As the sulfonation method, there have been proposed sulfonation methods, for example, Japanese Patent Publication No. 50-33838.
The methods disclosed in JP-A-51-37226 and JP-A-51-37227 can be adopted. The higher the SO ₂ / polymer to be sulfonated molar ratio, the higher the reaction temperature, the lower the water content, and the lower the stirring speed, the easier the crosslinked structure is formed. As the reaction solvent, an organic solvent which is inert to the sulfonating agent is used. Examples of suitable organic solvents used include methylene dichloride, ethyl chloride, 1,1-dichloroethane, 1,2-dichloroethane, carbon tetrachloride, chloroform and 1,1,2,2-tetrachloroethane. . The smaller the amount of solvent used, the easier the crosslinking. By making a crosslinked structure, the weight average molecular weight of the sulfonation reaction,
The ratio to the weight average molecular weight of the raw material polymer before sulfonation increases. In the present invention, this ratio is preferably 1.5 to 5 times. If it is less than 1.5 times, the effect of the present invention cannot be obtained. 5
If the amount exceeds twice, the amount of water-insoluble polymer increases, which is inconvenient.

A compound having a copolymerizable double bond may be copolymerized with the raw material aromatic hydrocarbon polymer. Examples of the compound to be copolymerized include the compounds (1) to (3) described in the production method of the group (A). The copolymerization ratio is preferably 0 to 50 mol% with respect to all the monomers. If it exceeds 50 mol%, a stable emulsion, which is the effect of the present invention, cannot be obtained.

After sulfonation, it is neutralized with a basic component.
Examples of the base component include hydroxides of alkali metals such as lithium, sodium and potassium, hydroxides of alkaline earth metals such as magnesium, calcium and barium, ammonia, monoethanolamine, diethanolamine,
Aqueous solutions or water slurries of lower amines such as triethanolamine and triethylamine are used. Of these, sodium or calcium hydroxide is preferable. (B)
To produce anionic polymers or copolymers of the group
The method disclosed in Japanese Patent Laid-Open No. 3-200893 can also be applied.

The weight average molecular weight of the anionic polymer or copolymer (c) used in the present invention is 5,000 to 500,000.
If the weight average molecular weight is less than 5,000, the effect of the present invention cannot be obtained. If it exceeds 500,000, the viscosity of the emulsion tends to increase during storage, which is inconvenient.

In the present invention, a surfactant other than the above essential components may be used in combination. In that case, the following nonionic surfactants, anionic surfactants, cationic surfactants, and amphoteric surfactants can be selected.

<Nonionic Surfactant> i) Alkylene oxide adducts of phenol compounds such as phenol, cresol, butylphenol, octylphenol, nonylphenol, dinonylphenol, p-cumylphenol and bisphenol A. ii) Alkylene oxide adducts of formalin condensates of phenol compounds such as phenol, cresol, butylphenol, octylphenol, nonylphenol, dinonylphenol, styrenated phenol and benzylated phenol. Degree of condensation is 1.2 to 100, preferably 2 to 20
Is. iii) An alkylene oxide adduct of a monohydric aliphatic alcohol having 8 to 50 carbon atoms. Octanol as alcohol,
2-ethylhexanol, nonanol, decanol, isodecanol, undecanol, lauryl alcohol,
Examples thereof include tridecanol, tetradecanol, hexadecanol, octadecanol, and an oxo-method synthetic alcohol.

Iv) An alkylene oxide adduct of an aliphatic amine having 8 to 50 carbon atoms. v) An alkylene oxide adduct of a fatty acid having 8 to 50 carbon atoms. As the fatty acid, caprylic acid, capric acid, undecanoic acid, lauric acid, myristic acid, palmitic acid, stearic acid, arachidic acid, behenic acid, cerotic acid, montanic acid, linear saturated fatty acids such as melissic acid, linderic acid (cis -4-dodecenoic acid), tetradecenoic acid, palmitoleic acid, octadecenoic acid, oleic acid, elaidic acid, eicosenoic acid, erucic acid and other unsaturated fatty acids, carbon number 16 to
Examples include 20 unsaturated fatty acid dimer and oligomer acids, tall oil fatty acids, tall oil fatty acid dimer and oligomer acids, and the like.

Vi) An alkylene peroxide adduct of a partial ester of a polycarboxylic acid having 8 to 50 carbon atoms and an alcohol having 1 to 18 carbon atoms. As the polycarboxylic acid, 2-methylnonanedioic acid, sebacic acid, 1,10-decanedioic acid, brassic acid (tridecanedioic acid), pentadecanedioic acid, eicosanedioic acid, 2,4,4-trimethyladipic acid, carbon Number 16 ~
As dimer acid and oligomer acid of 20 unsaturated fatty acids and alcohols, methanol, ethanol, isopropanol, n-butanol, isobutanol, amyl alcohol, isoamyl alcohol, hexyl alcohol, 2-methylpentanol, heptanol, octanol, 2- Ethylhexanol, lauryl alcohol,
Secondary alcohols such as stearyl alcohol, isostearyl alcohol, synthetic alcohols by oxo method, se
Examples thereof include secondary alcohols such as c-butanol, methylisobutylcarbitol and pentan-2-ol, and tertiary alcohols such as tert-butanol.

Vii) A block or random addition polymer of alkylene oxide. viii) alkylene oxide adducts of polyhydric alcohols. ix) Alkylene oxide adduct of ester of polyhydric alcohol and fatty acid having 8 to 18 carbon atoms. Polyhydric alcohols include ethylene glycol, propylene glycol, 1,2
-Butanediol, 1,3-butanediol, 1,4-butanediol, dihydric alcohols such as neopentyl glycol, hexylene glycol and condensates thereof, trihydric alcohols such as glycerin and trimethylolpropane, pentaerythritol, Examples include sorbitol, sucrose, polyglycerin and the like. x) An alkylene oxide adduct of a polyvalent amine having active hydrogen such as ethylenediamine, tetraethylenediamine, polyethyleneimine (molecular weight 500 to 10,000). xi) A product obtained by adding an alkylene oxide to a mixture of 1 mol of a triglyceride type oil and fat and 0.1 to 5 mol of a polyhydric alcohol and / or water.

<Anionic Surfactant> i) Formaldehyde condensate of sulfonic acid or sulfonate of aromatic compound such as naphthalene, methylnaphthalene, alkylnaphthalene, octylphenol, nonylphenol, dinonylphenol, long-chain alkylphenol and long-chain alkylbenzene. . Preferably, the average degree of condensation of formaldehyde is 1.2-100. ii) ligninsulfonic acid or a salt thereof, or a derivative thereof,
Formaldehyde condensate of lignin sulfonic acid and sulfonic acid of aromatic compound such as naphthalene and alkylnaphthalene, or a salt thereof. Preferably, the average degree of condensation of formaldehyde is 1.2-100. iii) Polystyrene sulfonic acid or a salt thereof, a copolymer of styrene sulfonic acid and another copolymerizable monomer, or a salt thereof. Preferably the molecular weight is between 1000 and 500,000. iv) Dicyclopentadienesulfonic acid polymer or a salt thereof. Preferably the molecular weight is between 1000 and 500,000.

V) Copolymers of maleic anhydride or / and itaconic anhydride with other copolymerizable monomers and salts thereof. Preferably the molecular weight is between 1000 and 500,000. vi) Maleates of liquid polybutadiene and salts thereof. The liquid polybutadiene preferably has a molecular weight of 1,000 to 500,000. vii) A sulfate ester salt of an alcohol having 4 to 18 carbon atoms. viii) C4-18 alkane sulfonic acids, alkene sulfonic acids, alkylaryl sulfonic acids or hydroxyalkane sulfonic acids and / or salts thereof. ix) Sulfates or phosphates of alkylene oxide adducts of compounds having at least one active hydrogen and salts thereof.

X) C4-22 saturated or unsaturated fatty acid ester derivative of sulfosuccinate. xi) Alkyl diphenyl ether disulfonic acid or a salt thereof. A preferred alkyl group is an alkyl group having 8 to 18 carbon atoms. xii) Rosin acid or its salt, tall oil fatty acid or its salt. xiii) Alkane or alkene fatty acid salt having 8 to 18 carbon atoms. xiv) An α-sulfo fatty acid ester salt represented by the following general formula (1).

[0024]

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(Wherein R ₁ is an alkyl or alkenyl group having 6 to 22 carbon atoms, R ₂ is an alkyl group having 1 to 22 carbon atoms, M is a monovalent or divalent metal atom, NH ₄ or an organic amine, n
Indicates 1 or 2. ) Incidentally, for the compounds i) to xiv), as salts, ammonium, monoethanolamine, diethanolamine,
Examples thereof include lower amines such as triethanolamine and triethylamine, alkali metal salts such as lithium, sodium and potassium, and alkaline earth metal salts such as magnesium, calcium and barium.

<Cationic Surfactant and Amphoteric Surfactant> i) Alkyl and / or alkenylamine salts obtained by neutralizing an alkyl and / or alkenylamine having 4 to 18 carbon atoms with an inorganic acid or an organic acid. ii) A quaternary ammonium salt represented by the following formulas (2) to (4).

[0027]

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[0028]

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[0029]

[Chemical 4]

Iii) Alkyl betaines represented by the following formula (5).

[0031]

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Iv) An alkylamine oxide represented by the following formula (6).

[0033]

[Chemical 6]

V) An alkylalanine represented by the following formula (7).

[0035]

[Chemical 7]

Vi) A polyamate represented by the following formula (8) or (9).

[0037]

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Vii) A polyamine salt represented by the following formula (10) or (11).

R ₉ NHC ₃ H ₆ NHX '(10) R ₉ NH (C ₃ H ₆ NH) ₂ X' (11) (wherein R ₉ has the same meaning as described above, X'is an inorganic acid or It is an organic acid.) Viii) An imidazoline-type amphoteric surfactant represented by the following formula (12).

[0040]

[Chemical 9]

Ix) A sulfobetaine-type amphoteric surfactant represented by the following formula (13).

[0042]

[Chemical 10]

The disperser which can be used in the present invention to produce the oil-in-water type heavy oil emulsion has a shear rate (blade circumferential speed / clearance) of 2,000 to 100,000 S ^-1 , preferably 2
A stirring speed corresponding to about 0,000 to 100,000 S ^-1 can be given, and a commonly used emulsifying machine or dispersing machine such as a homomixer, a homogenizer, a line mixer, a milder, a static mixer, and a motionless mixer can be used. A homomixer and a line mixer are preferable. If the shear rate of the disperser is less than 2,000 S ^-1 ,
The obtained emulsion has an average particle size as large as several tens of microns, and the stability deteriorates. Further, if the average particle size of the emulsion is several microns, the stability is sufficiently satisfactory, and if the shear rate exceeds 100,000 S ^-1 , the power consumption only increases, which is not economical.

The heavy oil used in the present invention is an oil that has poor fluidity at room temperature and does not flow unless heated to a high temperature, and includes the following. (1) Mixtures of petroleum-based asphalts and their oils (2) Various treated products of petroleum-based asphalts, their intermediate products, residual oils, and mixtures thereof (3) Crude oil (4) Petroleum-based tar pitches and oil mixtures thereof (5) ) Bitumens, natural asphalt, Orinoco tar, Athabasca bitumen.

In the present invention, the addition amount of the anionic polymer or copolymer (c) containing a polymerizable aromatic sulfonate as an essential monomer component and having a crosslinked structure and a weight average molecular weight of 5000 to 500,000 is 0.1 to 5% by weight, preferably 0.2 to 1% by weight, based on the total weight of the heavy oil emulsion fuel composition. If the amount added is less than 0.1% by weight, it is difficult to obtain a stable emulsion having a large particle size, and if more than 5% by weight is added, it is uneconomical and no improvement effect on the quality of the emulsion is recognized. The content of heavy oil and water in the heavy oil emulsion fuel composition of the present invention is
60 to 85% by weight of heavy oil and 10 to 40% by weight of water are suitable. If the heavy oil is less than 60% by weight, the calorific value as a fuel decreases, and the ignitability deteriorates. If it exceeds 85% by weight, the viscosity of the emulsion also increases and the handling property deteriorates.

[0046]

EXAMPLES The present invention will now be described in more detail with reference to examples, but the present invention is not limited to these examples. In the following examples and comparative examples, asphalt obtained from Arabian light crude oil was used as the heavy oil. Table 1 shows the properties of asphalt.

[0047]

[Table 1]

The anionic polymers or copolymers used in the following Examples and Comparative Examples are shown in Tables 2 and 3.
The weight average molecular weight of the polymer was determined by the following method. <How to obtain weight average molecular weight> Tosoh Co., Ltd.
Two TSK-GEL G2000SW's and two G4000SW's each were connected to each other and determined by the GPC method using an ultraviolet detector (wavelength 210 nm). Polystyrene was used as a molecular weight standard.

[0049]

[Table 2]

[0050]

[Table 3]

In Tables 2 and 3 above, the abbreviations in the monomer components have the following meanings. NaSS: Styrene sulfonic acid Na CaSS: Styrene sulfonic acid Ca MA: Methacrylic acid AA: Acrylic acid DEGDM: Diethylene glycol dimethacrylate DVB: Divinylbenzene Examples 1-30 and Comparative Examples 1-3 Heavy oil emulsions were prepared by the following methods. . The performance of the obtained heavy oil emulsion was evaluated by the following method. The results are shown in Tables 4 and 5. <Preparation Method of Heavy Oil Emulsion> A heavy oil emulsion was prepared by the apparatus shown in FIG. 1 using a line mixer PL-SL type manufactured by Tokushu Kika Kogyo Co., Ltd. That is, the asphalt 1 heated to 90 ° C., the anionic polymer or copolymer shown in Table 2 or Table 3, and optionally an aqueous solution 2 in which other surfactant is dissolved and heated to 70 ° C. are mixed at a desired flow rate. Then, it was supplied to the line mixer 5 by the respective supply pumps 3 and 4. The rotation speed of the line mixer was 8000 rpm. Table 4
Further, as shown in Table 5, various heavy oil emulsions 6 having different asphalt concentrations and addition amounts of anionic polymers or copolymers were obtained.

<Evaluation Method of Heavy Oil Emulsion> Particle Size: Laser Diffraction Particle Size Distribution Measuring Device manufactured by Horiba Ltd.
It was measured by LA-700. Coarse particle amount: About 15 g (W ₁ ) of the emulsion weighed in a 100 ml beaker is poured into a 100 mesh JIS standard sieve (JIS Z 8801) having a diameter of 8 cm. Take about 50 ml of deionized water in the same beaker and wash away the emulsion on the sieve.
Washing is performed 3 times, the water content is dried, and the weight of asphalt remaining on the sieve is measured (W ₂ ). By the formula below
Calculate the amount of coarse particles on a 100 mesh screen in% by weight.

[0053]

[Equation 1]

Viscosity: Measured with a B-type viscometer (model BM) manufactured by Tokyo Keiki Seisakusho. The emulsion was immersed in a thermostatic bath at 25 ° C for 30 minutes or more before measurement, and then the pointer was read 1 minute after the start of rotation at 25 ° C and 60 rpm. The rotor used was No. 3 or 4, and the respective coefficients were multiplied to determine the apparent viscosity in units of centipoise. Stability: The emulsion was placed in a glass test tube (inner diameter: 3 cm, height: 30 cm) so that the liquid depth became 25 cm, and allowed to stand at 25 ° C. After one month, the amount of separated water (in mm), viscosity and the amount of coarse particles on the surface were measured. The total stability was evaluated according to the following criteria. ◎ Very good ○ Good △ A little bad × bad

[0055]

[Table 4]

[0056]

[Table 5]

Note) Emulgen 921: Nonylphenol ethylene oxide adduct (manufactured by Kao Corporation) Emulgen 913: Nonylphenol ethylene oxide adduct (manufactured by Kao Corporation) Emulgen 707: Higher alcohol ethylene oxide adduct (manufactured by Kao Corporation) Amit 320 : Alkylamine ethylene oxide adduct (manufactured by Kao Corporation) Emanone 3199: Polyoxyethylene stearate (manufactured by Kao Corporation) Emanone CH80: Hydrogenated castor oil Ethylene oxide adduct (manufactured by Kao Corporation) Perex OT-P: Dialkyl Na sulfosuccinate (manufactured by Kao Corporation) Neoperex N6: Na dodecylbenzene sulfonate (manufactured by Kao Corporation) AOS: Na hexadecene sulfonate (manufactured by Kao Corporation)

[0058]

According to the present invention, a heavy oil emulsion fuel composition having good fluidity and excellent storage stability can be provided. In particular, it was possible to provide a good heavy oil emulsion fuel composition having a 100 mesh sieve residue of 1% by weight or less immediately after production and after 1 month.

[Brief description of drawings]

FIG. 1 is a schematic diagram of an apparatus used in an example of the present invention.

[Explanation of symbols]

 1 Asphalt 2 Aqueous solution 3 Asphalt supply pump 4 Aqueous solution supply pump 5 Line mixer 6 Heavy oil emulsion

Claims (4)

[Claims] 1. An anion containing (a) heavy oil, (b) water, and (c) a polymerizable aromatic sulfonate as an essential monomer component and having a crosslinked structure and a weight average molecular weight of 5,000 to 500,000. An oil-in-water type heavy oil emulsion fuel composition, characterized by containing a water-soluble polymer or copolymer as an essential component. 2. The content of each component in the composition is a heavy oil.
The heavy oil emulsion fuel composition according to claim 1, wherein (a) 60 to 85% by weight, water (b) 10 to 40% by weight, and anionic polymer or copolymer (c) 0.1 to 5% by weight. 3. The anionic polymer or copolymer (c) is
The heavy oil emulsion fuel composition according to claim 1 or 2, which is one or more selected from the group consisting of the following (a) and (b): (A) The polymerizable aromatic sulfonic acid or salt thereof and at least one cross-linking agent, and the amount of the cross-linking agent is from 0.1 to 10% of the total amount of the monomers.
Anionic copolymer obtained by copolymerization at a ratio of 10 mol%. (B) A polymer or copolymer of a polymerizable aromatic hydrocarbon is sulfonated and neutralized, and the weight average molecular weight of the polymer obtained by the sulfonation reaction is the weight average molecular weight of the raw material polymer before sulfonation. 1.5 to 5 times the anionic polymer or copolymer. 4. The heavy oil emulsion fuel composition according to claim 1, wherein the 100-mesh sieving residue immediately after production and after 1 month is 1% by weight or less.