JPH0335090A - Additive for mixture of carbon fine powder and oil - Google Patents

Abstract

PURPOSE:To provide the subject additives containing a half-esterified polyether compound having an aromatic ring and capable of stably preventing soft coagulation of a carbon fine powder oil slurry during storage even when the grade, etc., of coal is changed. CONSTITUTION:An objective additive containing a polyether compound having an aromatic ring in the molecule, the alkylene oxide-added polyether terminal hydroxyl group partially or thoroughly half-esterified with a hydrocarbon- substituted succinic acid and 500-100000 (preferably 1000-3000) weight-average molecular weight. As typical examples of the above mentioned compounds, compounds represented by formulae I and II (R<1> is H or substituent; R<2> is alkylene oxide; R<3> is hydrocarbon; n is number of moles of addition) are exemplified.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an additive that stably suppresses soft agglomeration during storage of carbonaceous fine powder/oil slurry even if the brand of coal changes.

From the perspective of soaring oil prices and diversification of energy resources 1
The use of carbonaceous fine powder such as coal and petroleum coke is attracting attention. Since coal and petroleum coke are solid fuels,
Since it is difficult to handle it as it is, it is pulverized into a slurry. This one is.

Pulverized coal/oil mixed slurry that turns pulverized coal into a slurry with oil (
COM: Coal Oil Mixture), and the other is petroleum coke oil slurry (POM: Petrco), which slurries petroleum coke with oil.
keOil Mixture).

Since COM and POM have fluidity, they can be transported by tanker or pipeline in the same way as liquid fuels such as petroleum, and have great advantages in terms of handling. COM has already been put into practical use as a fuel source for electric power, but when COM is stored for a long period of time, a hard cake of compacted pulverized coal gradually forms and accumulates at the bottom of the storage tank, which impedes the ability to discharge COM. You can see the case. To deal with this,
Various substances have been investigated as stabilizers to prevent the separation and sedimentation of pulverized coal, and it has been found that the formation of hard cakes can be suppressed by adding a specific surfactant (Japanese Unexamined Patent Publication No. 137992/1983, 63-154797).

However, as a result of long-term practical operation, C.
It has been found that soft agglomeration of OM creates a new problem in that the differential pressure of the transfer pump becomes high, which impedes pumpability, which is very important when handling fluid COM.

It was also found that the occurrence of soft agglomeration was influenced by the brand and lot of coal.

Furthermore, depending on the brand and lot of coal or the preparation conditions of COM, a relatively large amount of hydrophilic ash may be liberated in the oil, causing blockage of pipes and nozzles.
It was also confirmed that soft aggregation may occur.

Although the above description has focused on COM, the same applies to POM, and it has been desired to suppress soft aggregation and improve pumping properties.

The present invention aims to prevent the formation of hard cakes in carbon fine powder/oil mixtures (hereinafter sometimes simply referred to as COM).
The objective is to provide an additive that suppresses soft agglomeration and facilitates the operation of the total system by improving pumping performance.

The additive of the present invention includes the following (A) component, or (A)
It is characterized by containing component (B) or component (C).

(A) A polyether compound having an aromatic ring in the molecule and having a part or all of the terminal hydroxyl groups of a polyether added with an alkylene oxide semi-esterified with hydrocarbon group-substituted succinic acid.

(B) Fatty acid with 6 to 30 carbon atoms and 2 to 3 nitrogen atoms
A polyamine fatty acid amide obtained by reacting No. 30 with a polyamine.

(C) An amine compound selected from amines, amine salts, and quaternary ammonium salts having 1 to 3 long-chain aliphatic hydrocarbon groups.

The present invention will be explained in more detail below.

In the polyether compound of component (A), a part or all of the terminal hydroxyl groups of a polyether having an aromatic ring and an alkylene oxide added thereto are half-esterified with hydrocarbon group-substituted succinic acid.

Representative examples of this polyether compound include the following (A-
1) and (A-2). Note that the structural example is for reference only, and does not limit the number of aromatic ring substituents, the number of hydrocarbon substituents of succinic acid, the number of active hydrogens to which alkylene oxide is added, etc.

(A-1) A half ester of an alkylene oxide adduct of a compound having an aromatic ring and a hydrocarbon group-substituted succinic acid.

Structural example: 3 (R1: hydrogen or substituent R2: alkylene oxide unit R1: hydrocarbon group n: number of moles added) (A-2) Alkylene oxide adduct of aliphatic aldehyde condensation of a compound having an aromatic ring , a semi-engineered ester with a hydrocarbon group-substituted succinic acid.

Structural example: 3 In the production of the polyether compound (A-2) above, aliphatic aldehyde condensation, alkylene oxide addition,
The order of esterification of succinic acid is not particularly limited, but focusing on the synthesis process, it can be divided into the following (A-3) to (A-5), which have substantially the same properties.

(A-3) A polyether compound in which an alkylene oxide is added to an aldehyde condensation product of a compound having an aromatic ring in the molecule, and then at least one terminal hydroxyl group is half-esterified with hydrocarbon-substituted succinic acid.

(A-4) A polyether compound in which an alkylene oxide adduct of a compound having an aromatic ring in the molecule is condensed with an aliphatic aldehyde, and then at least one terminal hydroxyl group is half-esterified with hydrocarbon-substituted succinic acid.

(A-5) A polyether compound obtained by half-esterifying at least one terminal hydroxyl group of an alkylene oxide adduct of a compound having an aromatic ring in the molecule with hydrocarbon-substituted succinic acid, and then condensing it with an aliphatic aldehyde. .

(A-1) and (A-2) Compounds having an aromatic ring in the molecule (skeletal compounds) may be unsubstituted or substituted with a substituent such as an alkyl group, aryl group, or aralkyl group. may have been done. In aliphatic aldehyde condensation, the same skeleton compound may be aldehyde condensed,
Also, for example, 2 such as nonylphenol and phenol.
Mixtures of more than one type of different backbone compounds may be subjected to aldehyde condensation.

Furthermore, when a compound having a nuclear substituent such as an alkyl group, an aryl group, or an aralkyl group is used as at least a part of the skeleton compound, aldehyde condensation, alkylene oxide addition, half-esterification, etc. Alternatively, each of the above steps may be carried out using an aromatic compound that does not have a nuclear substituent as a starting material, and a nuclear substituent may be introduced at an appropriate stage of this process. Depending on the number of moles of substituting agent used, a nuclear substituent is introduced into the aromatic ring.

Examples of polyether compounds in which the skeleton compound is substituted with an alkyl group or an aralkyl group include the following (A-6).

(A-6) A half ester of an alkylene oxide adduct of an aliphatic aldehyde condensate of a compound having an aralkyl group or an aromatic ring whose nucleus is substituted with an aralkyl group and an alkyl group in the molecule and a hydrocarbon group-substituted succinic acid. .

Moreover, when looking at the manufacturing method of the polyether compound (A-6) above, the following (A-7) to (A-10) can be mentioned.

(A-7) Adding an alkylene oxide to an aliphatic aldehyde condensate of a skeleton compound containing as an essential component a compound having an aralkyl group or an aromatic ring whose nucleus is substituted with an aralkyl group and an alkyl group in the molecule, and then A polyether compound obtained by half-esterifying at least one terminal hydroxyl group with a hydrocarbon-substituted succinic acid.

(A-8) An alkylene oxide is added to a skeleton compound having as an essential component a compound having an aralkyl group or an aromatic ring whose nucleus is substituted with an aralkyl group and an alkyl group in the molecule.

A polyether compound obtained by subsequently condensing an aliphatic aldehyde and further half-esterifying at least one terminal hydroxyl group with a hydrocarbon-substituted succinic acid.

(A-9) An alkylene oxide is added to a skeleton compound having as an essential component a compound having an aralkyl group or an aromatic ring whose nucleus is substituted with an aralkyl group and an alkyl group in the molecule.

Subsequently, at least one terminal hydroxyl group is half-esterified with hydrocarbon group-substituted succinic acid, and further condensed with an aliphatic aldehyde to obtain a polyether compound.

(A-10) For a compound having an aromatic ring in the molecule,
an aliphatic aldehyde condensation step, an alkylene oxide addition step, and a half-esterification step of at least one terminal hydroxyl group with a hydrocarbon group-substituted succinic acid (the order of each step does not matter), and any of the above steps. After the process, with an aralkyl group.

Or polyether compounds obtained by nuclear substitution with aralkyl groups and alkyl groups.

As skeleton compounds, substituted or unsubstituted phenols,
Cresol, octylphenol.

Phenols such as nonylphenol, dodecylphenol, phenylphenol, dinonylphenol, benzylphenol, and bisphenol A; Naphthols such as naphthol and methylnaphthol; Monohydric alcohols such as benzyl alcohol; Benzoic acid, phenylacetic acid, toluic acid, and phthalic acid Carboxylic acids such as: hydroxycarboxylic acids such as salicylic acid and cresotic acid; and amines such as aniline and aminophenol.

Furthermore, examples of skeleton compounds whose nucleus is substituted with a substituent other than an alkyl group or an aryl group include those substituted with an aralkyl group. Specific examples of phenols whose nucleus is substituted with an aralkyl group or an aralkyl group and an alkyl group are represented by the following general formula (1) or (II).

(1) (II) (wherein,
R4 is an aralkyl group and a% is an alkyl group.

(m and n indicate the number of substitutions) The number of aromatic rings constituting the aralkyl group may be singular or plural, and the alkyl group and aralkyl group may be linear or branched. Examples of aromatic phenols include, in addition to phenol, polycondensed ring phenolic compounds such as naphthol.

Typical examples of such skeleton compounds include mono- or di- or tristyrenated phenol (α-methylbenzylphenol; -mono- or distyrenated octylphenol).

Examples include mono- or distyrenated nonylphenol, mono- or distyrenated dodecylphenol, monostyrenated dinonylphenol, monostyrenated t-butylphenol, bisphenol A, mono- or dibenzylphenol. Examples of the naphthol nuclear-substituted with an aralkyl group or an aralkyl group and an alkyl group include mono- or dibenzylnaphthol, mono- or distyrenated α-methylnaphthol, mono- or distyrenated c1. Examples include alkylnaphthol, mono- or dibenzylnaphthol, and the like. These skeleton compounds may be used alone or in combination.

As the alkylene oxide added to the skeleton compound,
Ethylene oxide (EO), propylene oxide (p
o), butylene oxide (BO) is used. In addition, these alkylene oxides may be combined,
In that case, the addition method may be block addition or random addition, but block addition is preferable, and in that case, it is preferable to add ethylene oxide to the terminal.

Aldehyde condensation can be performed using known methods. Sulfuric acid for aldehyde condensation.

An acidic catalyst such as hydrochloric acid or a basic catalyst such as sodium hydroxide or potassium hydroxide can be used, but an acidic catalyst is preferable. Examples of aliphatic aldehydes include formaldehyde, acetaldehyde, etc. Among them, formaldehyde is preferable.

The conditions for the aliphatic aldehyde condensation are those commonly used. For example, 0.3 aliphatic aldehyde is added to 1 mole of the skeleton compound, the alkylene oxide adduct of the skeleton compound, or the half-esterified product of its terminal hydroxyl group.
~5 moles.

Preferably 0.5-3 mol, acidic catalyst 0.01-0.
Using 2 mol, stirring at 60-150°C for 1-25 hours,
Next, the temperature is raised to 100-180°C and aged for 1-3 hours.

At this time, a suitable catalyst may be used.

Examples of the hydrocarbon-substituted succinic acid used for half-esterification include succinic acid substituted with a C1-C2 alkyl group, alkenyl group, etc., and it is suitable to use it in the reaction as an anhydride.

Preferred is alkenylsuccinic acid, C1-C24
It is obtained by reacting α-olefin or internal olefin with maleic anhydride. Specific examples include dodecylene succinic acid, diisobutenyl succinic acid, and alkenyl succinic acid obtained by reacting an olefin oligomer having an average carbon number of 12 and 16.18, respectively, with maleic anhydride.

The reaction conditions for half-esterification are usually those normally used. For example, the above succinic anhydride is added in an amount of 0.05 to 10 mol, preferably 0.05 to 10 mol, per 1 mol of an alkylene oxide adduct of a skeleton compound or its formalin condensate. is 0.1
~4 mol and stir at 100-250<0>C for 5-30 hours. On this occasion.

A suitable catalyst may also be used.

It is sufficient to carry out the aralkylation under commonly used conditions.1 For example, add an aralkylating agent equivalent to a predetermined molar ratio, stir at 100 to 200'C for 3 to 10 hours,
After this, it is aged for 1 to 3 hours. At this time, a suitable acid catalyst may be used.

The polyether compound of the present invention has a weight average molecular weight of 500 to 10,000, preferably 1000,000.
Above, it is less than 3000.

As a result of long-term practical operation, the present inventors obtained the following findings regarding the occurrence of soft agglomeration of COM.

■ Soft agglomeration may or may not occur depending on the brand of coal.

■ Even with the same brand of coal, soft agglomeration may or may not occur depending on the loft. In order to clarify the cause, we conducted property analysis (industrial analysis, elemental analysis, and ash property analysis) of 1 coal, but no significant differences were found, making it difficult to extract the cause.

■ After examining many types of coal, it appears that there is a correlation between the amount and composition of ash contained in a single coal and the soft agglomeration of COM.

As a result of focusing on the ash content of coal and intensively examining the influence of clay minerals, it became clear that certain carbonate minerals increase the soft agglomeration of COM, although the exact mechanism is not fully understood. .

Based on the above findings and the results of previous studies, the present inventors have determined that, in the same way that radicals are generated and activated on the surface of coal by mechanical forces such as crushing, clay minerals contained in coal are also mechanoactive. As a result of further investigation based on the idea that the surface is chemically activated and that this is the key point for forming the soft aggregation that became a problem, we arrived at the component (A) of the present invention.

That is, component (A) of the present invention is a polyether compound conventionally known as an additive for COM that is half-esterified with a succinic acid derivative such as alkenyl succinic acid. In addition to inactivating active sites through adsorption, it also strongly adsorbs to the coal surface.
Component (A) of the present invention, which exhibits the added effect even more, not only suppresses the formation of hard cakes in COM, but also appears to occur mechanochemically, regardless of variations in coal type, etc. It is also possible to prevent soft agglomeration of COM and provide COMtt with excellent shear resistance.

Furthermore, a relatively large amount of hydrophilic ash is liberated depending on the brand or lot of coal or during the manufacturing process of COM, which may cause the following troubles.

■ When COM is stored for a long period of time, ash adheres to the bottom of the storage tank, the stirring blades, the walls of the pipes, etc., creating a compacted layer. This causes problems such as pipe blockage and nozzle clogging.

■ Depending on the composition of free ash, soft agglomeration of COM may occur, which may impede pumping performance.

In such a case, the addition effect can be more effectively exerted by combining component (B) or (C), which has a high effect of dispersing ash in oil, with component (A).

That is, by combining component (A) with component (B) or (C) to form an additive for COM, the ash surface can be mechanochemically activated depending on the brand of coal, loft, COM preparation conditions, etc. This makes it possible to suppress the occurrence of trouble and to produce COM with stable properties not only when a large amount of free ash is generated, but also when a large amount of free ash is generated.

Furthermore, the additive of the present invention effectively exhibits a soft aggregation effect particularly on bituminous coal and sub-bituminous coal, which are coals with a low fuel ratio. This is because carbonate minerals, which tend to be easily decomposed by weathering, generally tend to be present in large quantities in coal with a low fuel ratio.

In addition, radical polymerization inhibitors and oxygen scavengers.

By using it in combination with additives effective for carbonaceous substances such as antioxidants and clay minerals, it is possible to more effectively prevent soft agglomeration and the like, thereby making it possible to produce stable COM.

Hereinafter, the above-mentioned additional components will be explained in order from component (B).

The fatty acid in the polyamine fatty acid amide of component (B) is one having 6 to 30 carbon atoms, and the hydrocarbon group may be either aliphatic or aromatic. , may be straight chain or branched, and may be saturated or unsaturated. The number of carboxyl groups in this fatty acid is preferably one or two in one molecule.

Specific examples of fatty acids include octanoic acid, palmitic acid,
Aliphatic carboxylic acids such as myristic acid, stearic acid, behenic acid, 2-ethylhexanoic acid, isostearic acid, oleic acid, coconut fatty acid, soybean fatty acid, tallow fatty acid, hydrogenated tallow fatty acid, adipic acid, sebacic acid; benzoic acid acid,
Examples include aromatic carboxylic acids such as phthalic acid.

As polyamines, those containing 2 to 30 nitrogen atoms are used, and those having a skeleton represented by the following formula (1) or (■) are typical.

-C,H,,NH-...(1) (In the formula, m = 1 to 4.) Specific examples of polyamines include ethylenediamine, diethylenetriamine, triethylenetetramine, pentaethylenehexamine, and hexaethylene. Examples include butamine, propylene diamine, dipropylene triamine, pentapropylene hexamine, and polyethyleneimine.

The reaction between fatty acids and polyamines is carried out under normal pressure or reduced pressure.
It can be carried out at 0 to 200°C, preferably 80 to 180°C, for 1 to 20 hours. A catalyst is not particularly required, but one commonly used may be used.

It is appropriate to react 0.5 to 1.5 mol, preferably 0.8 to 1.2 mol, of fatty acid per mol of polyamine.

In addition, the obtained polyamine fatty acid amide is.

If necessary, the remaining amino groups may be neutralized with a suitable acid, and the neutralization rate is not particularly limited either. What acid is used for neutralization?

It may be an inorganic acid or an organic acid, and specific examples include acetic acid, lauric acid, coconut fatty acid, stearic acid, tallow fatty acid, and benzoic acid.

Preferred specific examples of component (B) include those shown in Table A below.

As the amine compound of component (C), at least one of amines having 1 to 3 long-chain aliphatic hydrocarbon groups, amine salts, and quaternary ammonium salts is used. As the long-chain aliphatic hydrocarbon group, an alkyl group or alkenyl group having 6 to 20 carbon atoms is suitable. Any appropriate counter ion can be used to constitute the amine salt or quaternary ammonium salt.

Specific examples of component (C) are as follows.

(1) Amines: mono- or di-dialkylamine, mono-dodecylamine, distearylamine, mono- or distearylamine, di-hardened tallow alkylamine, monooleylamine, coconut alkyl trimethylene diamine, tallow alkyl trimethylene diamine, coconut alkyl dipropylene Triamin.

(2) Amine salts: hydrochlorides, acetates, long-chain fatty acid salts, etc. of the above-mentioned amines; more specifically, for example, hydrochlorides of monococonut alkyl amines, acetates of monohardened tallow alkyl amines, coco alkyl trichlorides, etc. Examples include acetate of methylene diamine, acetate of coconut alkyl dipropylene triamine, and oleate of tallow alkyl triamine.

(3) Quaternary ammonium salt: Synthesized by reacting the above amine with a quaternizing agent such as a lower alkyl halide or dialkyl sulfate. More specifically, octyltrimethylammonium chloride, didodecyldimethylammonium chloride, coconut trimethylammonium chloride, and jadialkyldimethylammonium acetate.

These include beef tallow alkyltrimethylammonium chloride and dihardened beef tallow alkyldimethylammonium methyl sulfate.

Specific examples of clay minerals include montmorillonite, kaolin, nontronite, hectorite, vermiculite, attapulgite, and seviolite, which may be used alone or as a mixture of two or more.

Specific examples of radical polymerization inhibitors (D-1) include 2.
6-Ditertiary-butylhydroquinone.

Phenol, catechol, P-tert-butylcatechol, resorcinol, 1-naphthol, pyrogallol,
4-chlorresorcin, aniline, 0-aminophenol, p-aminophenol, 2-methyl-5-aminophenol, 4-aminocatechol, 3-hydroxy-4
-Aminoanisole, p-phenylenediamine, m-phenylenediamine, p-phenetidine, 〇-tolylenediamine, m-tolylenediamine, 2-chloro-p-phenylenediamine, 4-methoxy-m-phenylenediamine, 2- Methoxy-p-phenylenediamine, N,
N'-bis(2-hydroxyethyl)-p-phenylenediamine, N,N'-diphenyl-p-phenylenediamine, 2-nitro-p-phenylenediamine, 4-nitro-〇-phenylenediamine, Examples include tolylene diisocyanate, hydrazine, monoethanolamine, jetanolamine, triethanolamine, pentaethylenehexamine, and polyethyleneimine.

Oxygen scavenging compounds include sodium sulfite, sodium hydrogen sulfite, sodium hydrosulfide, sodium thiosulfate, sulfur, ferric chloride, and the like.

As the antioxidant, 2,6-ditertiary-butyl-
Examples include p-cresol, 2-tert-butyl-4-methoxyphenol, propyl gallate, isoamyl gallate, and ethyl protocatechuate.

Component (A) of the additive of the present invention is preferably added in an amount of about 0.01 to 2% by weight, more preferably 0.1 to 1% by weight, in the oil slurry of carbonaceous fine powder. %.

In addition, when using component (A) together with components (B) and (C), the weight ratio is (A)/(B) or (C) =
It is suitable to use in a ratio of 97/3 to 10/90,
More preferably it is 9515-20/80.

The additive of the present invention can be applied to various coals such as anthracite coal, bituminous coal, sub-bituminous coal, and lignite, and carbonaceous fine powder such as petroleum coke, and is applicable to coals with low fuel ratios such as bituminous coal and sub-bituminous coal. However, it exhibits excellent additive effects. The carbonaceous fine powder usually has a particle size of 100 μm or less, and preferably contains 50% or more of particles of 74 μm or less.

Examples of the oil used in producing the COM carbonaceous fine powder/oil slurry include crude oil, heavy oil, tar oil, and the like. Although it is more economical to add a small amount of oil to the fine powder, it is usually 30 to 70% by weight, preferably 35 to 60% by weight.
A range of % is appropriate.

The carbonaceous fine powder/oil slurry can be produced by mixing dry-pulverized carbonaceous material with oil, or by pulverizing carbonaceous material in oil.

The additive of the present invention can be added to the slurry at an appropriate time, such as during or after the production of the slurry.

According to the additive of the present invention, by using a specific polyether compound as the component (A), soft agglomeration is prevented in carbonaceous fine powder and oil slurry even when the brand of coal changes. Since this is effectively prevented and the bombing properties are improved, smooth operation of COM and POM manufacturing systems is possible.

In addition, by using a specific amide compound or amine compound as the component (A), CB), or (C), troubles may occur even if a large amount of free ash is generated due to changes in the brand of coal, etc. This makes it possible to manufacture stable COM by suppressing the

EXAMPLES Hereinafter, the effects of the present invention will be illustrated more specifically by Examples.

The evaluation method used in the examples and the properties of the coal, heavy oil, and representative components (A), (B), and (C) used are as follows.

(1) Soft aggregation evaluation method Inner volume 250+mfl (inner diameter 5.5cm, height 12.5cm)
200 g of sample slurry (COM) prepared by adding additives was placed in a plastic bottle (cm). Prepare two bottles for each additive,
It was stored stationary in an air bath constant temperature bath (temperature 64°C).

After 1 hour, the sample slurry from one of the bottles was passed through a JIS K2SO3 16-mesh sieve in the same thermostatic chamber and flowed out into a 300ts Q beaker, and it was confirmed that no more flowout occurred.

Regarding the other bottle in which the weight of the soft aggregates remaining on the sieve was measured, the same operations and measurements were performed after 30 days of storage, and the amount of soft aggregates X was calculated using the following formula.
Each numerical value was evaluated based on the criteria shown in Table B.

(Leaving space below) Table B Evaluation of amount remaining on sieve (amount of soft aggregates) (2) Evaluation method of ash adhesion Take approximately 300 g of COM prepared by a prescribed method, and
The mixture was stirred at 64° C. for 10 minutes using a K homomixer. Thereafter, the blades and shafts were washed with toluene, and the amount of ash adhering to them was measured.

(3) Properties of the coal, petroleum coke and heavy oil used (i
) Mora charcoal industrial analysis (JIS M8812) Moisture: 3.4% Ash content: 8.3% Volatile content: 32.3% Fixed carbon: 56.0% Fuel ratio: 1.73 Calorific value: 7250 kcal/kg Elemental analysis : C: 77.5%, H: 5.0%.

0: 6.5%, N: 0.5%.

S: 1.6% (5) Saxon Vale Coal Industry Analysis (JIS M8812) Moisture: 4.8% Ash: 17.3% Volatile Content: 29.3% Fixed Carbon: 53.4% Fuel Ratio: 1.82 Calorific value: 6760 kcal/kg Elemental analysis: C: 84.0%, H: 4.9%10:
8.8%, N: 1.8%.

S: O, S% (in) Heavy oil: Middle East C heavy oil Calorific value: 10300 kcal/kg (JIS 22
65) Specific gravity: 0.9507 (JIS K2249) Pour point: +7.5°C (JIS K2269) Flash point: 9
6.0℃ (JIS K2265) Ash content: 0.02%
(JIS K2272) Moisture: 0.07%
(JIS 2275) Elemental analysis: C: 85.4%, H
: 11.6%.

S: 1.90%, N: 0.20% (3) The properties of the (A) a component, (B) component and (C) component used are as shown in Tables 1 to 8 below, respectively.

(Leaving space below) Example 1 A predetermined amount of Middle East C heavy oil was charged into a stainless steel sedimentation tube with an internal volume of 800 m, and the tube was placed in a constant temperature water bath at 64°C. After the temperature became constant, using a lab mixer (manufactured by Tokushu Kika Kogyo), the carbon fine powder was heated at 64°C in another air bath while stirring at 1ooOrp@, so that the final carbon concentration was 50%. Added gradually. After addition, Tables 1 to 6
A predetermined amount of component (A) as shown in (A) was added as an additive, and the mixture was stirred at 4000 rpm for 5 minutes to prepare COM.

The soft aggregation (amount remaining on the sieve of 16 meshes) and the amount of ash attached to this COM were measured and evaluated, and the results are shown in Table 9 below.

Further, the additives of the two comparative examples were similarly evaluated, and the results are shown in Table 9 below.

Example 2 COM was prepared in the same manner as in Example 1 except that in addition to component (A), component (B) or (C) shown in Tables 7 to 8 was added.
was prepared and evaluated for the amount of ash attached, and the results are shown in Table 10.

Claims (1)

[Scope of Claims] 1. An additive for a carbonaceous fine powder/oil mixture, characterized by containing the following component (A). (A) A polyether compound having an aromatic ring in the molecule and in which part or all of the terminal hydroxyl groups of a polyether to which an alkylene oxide is added are half-esterified with hydrocarbon group-substituted succinic acid. 2. An additive for a carbonaceous fine powder/oil mixture, which contains the component (A) according to claim 1 and the following component (B) or (C). (B) Fatty acid with 6 to 30 carbon atoms and 2 to 3 nitrogen atoms
A polyamine fatty acid amide obtained by reacting No. 30 with a polyamine. (C) An amine compound selected from amines, amine salts, and quaternary ammonium salts having 1 to 3 long-chain aliphatic hydrocarbon groups. 3. Component (A) is the following (A-1) or (A-2)
The additive for carbonaceous fine powder/oil mixture according to claim 1 or 2. (A-1) A half ester of an alkylene oxide adduct of a compound having an aromatic ring and a hydrocarbon group-substituted succinic acid. (A-2) A half ester of an alkylene oxide adduct of an aliphatic aldehyde condensate of a compound having an aromatic ring and a hydrocarbon-substituted succinic acid.