JPH0762144B2 - Additives for mixed coal oil - Google Patents

Description

TECHNICAL FIELD The present invention relates to an additive for mixed coal oil.

2. Related Art and Problems Conventionally, various surfactants have been proposed as dispersion stabilizers for mixed coal oil. The main ones are anionic surfactants such as sodium alkylbenzene sulfonate, dialkyl sulfosuccinate, sodium naphthalene sulfonate formalin condensate, etc., nonionic surfactants such as alkylphenol ethylene oxide adducts and higher alcohol ethylene oxide adducts. Those containing the main component are known.

However, conventional dispersion stabilizers are effective for anthracite, bituminous coal, especially those having a relatively high coal content such as coking coal and strong coking coal, but non-coal components such as clay and Coal with a large amount of carbonized components is not effective enough and is often deposited in mixed coal oil transport pipes and combustion devices, resulting in a decrease in transport efficiency and combustion efficiency. When such deposits (hereinafter referred to as ash) are analyzed, they are mainly composed of viscous substances such as kaolinite rather than coal, and are used for mixed coal oils containing conventional anionic or nonionic surfactants as main components. The dispersion stabilizer cannot sufficiently suppress the deposition.

Means for Solving the Problems The present invention relates to a mixed coal oil additive containing lipophilic amines and a phenolic nonionic surfactant as active ingredients.

The amines that can be used in the present invention include primary amines and secondary amines.
Examples include primary amines, tertiary amines, polyamines, nitrogen-containing heterocyclic compounds, alkanolamines, quaternary ammonium compounds, and the like. The number of carbon atoms is not limited, but those having 4 or more alkyl groups or aromatic groups are preferable.

As the primary amine, a higher amine such as butylamine to stearylamine may be used, and an amine having a side chain such as diethylhexylamine or an unsaturated bond such as oleylamine may be used. It may also be an aromatic amine such as aniline. In general, amines having strong amine properties and excellent affinity for mineral oils are preferable, and aliphatic amines or aromatic amines having 4 or more carbon atoms are suitable.

The secondary amine may be a long chain secondary amine such as methyl stearyl amine in which at least one of the alkyl groups has a long chain. It may also be an aromatic amine such as diphenylamine or an aralkylamine such as monoethylaniline. The secondary amine is also preferably an aliphatic amine in which at least one of the alkyl groups has 4 or more carbon atoms,
Alternatively, aromatic amines are preferable, and about 1 mol of ethylene oxide or propylene oxide may be reacted as long as the lipophilicity is not impaired.

The same applies to tertiary amines, and at least one of the alkyl groups can be used from amines having 4 or more carbon atoms to higher amines such as dimethylstearylamine and aralkylamines such as diethylaniline. Preferably, one of the alkyl groups is an aliphatic amine having 4 to 18 carbon atoms or an aromatic amine. The tertiary amine can be converted into a quaternary ammonium salt by reacting ethylene oxide or propylene oxide in the presence of an acid catalyst such as hydrochloric acid. This may be desalted and used.

As the polyamine, polyamines such as ethylenediamine, diethylenetriamine, triethylenetetramine, pentaethylenehexamine and the like, a part of which is amidated with a suitable chain length, for example, a fatty acid having about 4 to 18 carbon atoms, are preferable. However, it is preferred that at least one amino group is free. It may also be an aromatic amine such as phenylenediamine.

The alkanolamine may be an alkylalkanolamine, for example, an amine having a higher alkyl group such as oleyldiethanolamine. Further, it may be an aromatic alkanolamine such as diethanolaniline.

It is preferable to use any of the above amino compounds in the form of an unneutralized product or a partially neutralized product. The reason for this is not clear, but the main component of ash is a layered viscous substance such as kaolin, the amine group that is a basic group is captured between the layers, and a hydrophobic group such as an alkyl group or an aromatic group is It is considered that it is oriented on the surface and is compatible with the oil of mixed coal oil to stabilize the dispersion.

The lipophilic amines are used in an amount of 0.001 to 2% by weight, preferably 0.005 to 0.5% by weight, based on the mixed coal oil. It may be blended with a phenolic nonionic surfactant and blended with blended coal oil, or blended with the oil used for producing blended coal oil, or blended coal oil blended with a phenolic nonionic surfactant. It is used by blending with. You don't have to use water,
The water content in the mixed coal oil is preferably 5% by weight or less, more preferably 2% by weight or less.

Phenolic nonionic surfactants to be added to the additive for mixed coal oil of the present invention include an ethylene oxide adduct of an alkylphenol or its formalin condensate, a copolymer of ethylene oxide and propylene oxide, a naphthol or an ethylene oxide of its formalin condensate. Adduct, phenylphenol,
Examples include nonionic surfactants such as ethylene oxide adducts such as styrenated phenol, and various polymer compounds alone or as a mixture.

For the present invention, particularly preferred is the use of an alkylphenol such as butylphenol, nonylphenol, octylphenol or the formalin condensate thereof with an ethylene oxide adduct or a nonionic surfactant to which propylene oxide is added and ethylene oxide is further added. The above nonionic surfactant is added to alkylphenol in advance of 5 to 5.
Particularly preferred are those obtained by reacting 100 mol of propylene oxide and further reacting with 10 to 250 mol of ethylene oxide or simply reacting alkylphenol with 10 to 200 mol of ethylene oxide.

The compounding ratio of the phenolic nonionic surfactant and the lipophilic amines is particularly preferably 0.01 to 1 part by weight with respect to 1 part by weight of the former.

The present invention will be described below with reference to examples.

Examples and Comparative Examples 49 parts by weight of fine powder of Saxon bell charcoal (200 mesh pass 84%) and 50 parts by weight of heavy oil were wet-processed in a mill, and 0.2 part by weight of a dispersant for mixed coal oil was added to 500 g of the mixture. And use a homomixer (4000r.pm) to mix thoroughly for 5 minutes,
Mixed coal oil was prepared.

Dispersant for mixed coal oil I: Dioctyl sulfosuccinate II: Dodecylbenzene sulfonate III: Nonylphenol EO (60 mol) adduct IV: Nonylphenol PO / EO (10/120) adduct V: Nonylphenol formalin condensate (condensation degree 3) PO / E
O (35/100) adduct where EO is ethylene oxide and PO is propylene oxide.

Furthermore, 0.2 parts by weight of the dispersant for blended coal oil blended with an amine compound corresponding to 10% by weight thereof was blended in place of the dispersant, and a blended coal oil was produced in the same manner. The following amine compounds were used.

A: triethylamine b: laurylamine c: aniline d: triethanolamine f: morpholine f: laurylamine ethylene oxide (2 mol) adduct to: amide of lauric acid (1 mol) and ethylenediamine (1 mol) th: octyl Monoethanolamine evaluation test Put the mixed coal oil 1 prepared as above into an autoclave, stir it at 700 rpm for 20 hours at 110 ° C, 10 kg / cm ^{2 in} a nitrogen atmosphere, using two stainless steel blades, and remove the blades. The amount of ash remaining after washing with toluene was measured.

The results are shown in Table-1.

Effect of the Invention When the additive for mixed coal oil of the present invention is used, it is possible to suppress the generation of grey-white deposits deposited in the pipe pipe when the mixed coal oil is circulated and used.

Claims (1)

[Claims] 1. An additive for mixed coal oil, which comprises lipophilic amines and a phenolic nonionic surfactant as active ingredients.