JPS6274995A - Additive for residual fuel oil - Google Patents

Abstract

PURPOSE:To provide the titled additive which is excellent in dispersion stability of the components such as asphaltene and prevents the occurrence of sludge and which comprises a particular compd. CONSTITUTION:A satd. or unsatd., straight-chain or branched alcohol is reacted with acrylonitrile. The reaction product is hydrogenated to obtain the titled additive comprising a compd. of the formula (wherein R1 is an 8-36C hydrocarbon group; R2-R4 are each H or an 8-22C hydrocarbon group; R is a 2-4C alkylene; n is an integer of 0-9; and m is an integer of 0-15). 0.05-5.0wt% additive is added to a residual fuel oil comprising a thermal cracking oil of a heavy oil as a base to obtain a residual fuel oil having excellent storage stability.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention provides an additive capable of imparting stability to residual fuel oil based on thermal decomposition residual oil of heavy oil, and the additive. This relates to the stable residual fuel oil contained in the fuel oil.

[Conventional technology and its problems]

Traditionally, residual fuel oil has been mainly produced using straight-run residual oil or desulfurized residual oil, but as crude oil becomes heavier and the supply and demand pattern of petroleum products becomes lighter, recently residual fuel oil has been made using residual fuel oil base. Residual fuel oil from cracked systems from visbreakers, etc., is being used as a material.

The cracked residual fuel oil obtained by visbreaking treatment tends to have a compositional decrease in KH1 aromatic content and resin content, and an increase in saturated valve and asphaltene content. Fuel oil stability becomes an issue. That is, unless the storage stability, thermal stability, and combination stability are quickly improved, many troubles will occur due to the produced as-7-artene sludge. For example, problems such as sludge accumulation at the bottom of the fuel tank, purifier failure, and strainer blockage occur.

When a diluent or residual fuel oil base material with sufficient aromaticity is used, asphaltenes, which are the source of sludge, form micelles in the fuel oil and are well dispersed, but the aromaticity is insufficient. If this occurs, asphaltenes and other substances will coagulate and settle, producing sludge. Generally, there is only a small amount of residual fuel oil that can exist stably without the addition of a dispersant, and stabilization with a dispersant is essential in most cases. So far, surfactants and polymer compounds such as metal salts of sulfonic acids and naphthenic acids, higher fatty acid esters, and methacrylates have been used as dispersants to prevent the generation of 7s-7artene sludge. , it is difficult to say that it exhibits a favorable dispersion effect.

[Means for solving problems]

The present inventors have made extensive studies to solve the above-mentioned problems, and have solved the above-mentioned problems by adding an ether-type amine or an ether-type polyamine having a long-chain alkyl group to residual fuel oil. We have found that this problem can be solved, and have arrived at the present invention.

That is, the present invention is based on the following general formula (where R1 is a hydrocarbon group having 8 to 66 carbon atoms, '2,
R3"4 represents a hydrogen atom or a hydrocarbon group having 8 to 22 carbon atoms, R represents an alkylene group having 2 to 4 carbon atoms, n represents an integer of 0 to 9, and m represents an integer of 0 to 15) The purpose of the present invention is to provide an additive for residual fuel oil consisting of a compound represented by the general formula The present invention provides a residual fuel oil characterized by a compound represented by the formula:

The compound used as the additive for residual fuel oil of the present invention may be any compound represented by the general formula (j), such as a compound represented by the following formula (% formula % rail etc.), The following formula R-0+CH
2CH2CH2N-)2H box R1-0+CH2CH2CjH2N→3HR, -0-f
CH20H2Ci)12N-)4H(R, nidodecyl,
Examples include compounds represented by tridecyl, stearyl, oleyl, etc., and compounds represented by the following formula (8% leyl, etc.).

The above compounds used as additives for residual fuel oil according to the present invention include, for example, compounds prepared by reacting alcohol in the form of 810H with acrylonitrile and further hydrogenating the same.
Alternatively, it can be produced by adding an alkylene oxide to an alcohol in the form of R1OH and then reacting it with acrylonitrile and hydrogenating it. As the alcohol in the form of R10H, saturated, unsaturated, linear, branched alcohols, Guerbet alcohol, synthetic alcohols, etc. can be used.

The amount of the additive used in the present invention may be appropriately selected depending on the properties of the residual fuel oil, but is usually 0.05 to 5.0% by weight,
Particularly preferred is an amount of 0.1 to 1.0% by weight.

The additive of the present invention is for residual lighting oil t), M5
Pyrolysis treatment such as visbreaking of M oil is applied to pyrolysis oil, which is a grade 9 residual oil. When the additive of the present invention is used, even in fuel oil using an unstable base material in which the sludge in the fuel oil exceeds 0.1% by weight, the sludge in the fuel oil can be reduced to 0.11% by weight.
Since it is possible to do the following, problems related to residual fuel oil can be solved.

Next, the residual fuel oil of the present invention will be explained.

The residual fuel oil of the present invention includes the above-mentioned p% pyrolysis residual oil,
It consists of a diluent and a dispersing additive.

As the thermal decomposition residual oil, residual oil that has been subjected to thermal decomposition treatment such as visbreaking of heavy oil is used.

Examples of diluents include cracked cycle oil, kerosene,
Light oil etc. are used. The amount of diluent in the residual fuel oil may vary over a wide range, but it is usually preferred to use it in the range of 20 to 80%. The above-mentioned compounds are used as dispersing additives. The amount of additive used may be selected appropriately depending on the properties of the residual fuel oil, but it is usually Q, 05
~5. Q IIL amount%, especially 0.1 to 1. Qli,i
i% o approx.

amount is preferred.

Note that the pyrolysis residual oil, diluent, and dispersion additive may be mixed in any order.

The residual fuel oil of the present invention has excellent dispersion stability of these components and is a stable fuel that does not generate sludge, even when using an unstable base material with a high content of components that can become sludge (for example, asqualtene). It becomes oil.

〔Example〕

EXAMPLES The present invention will be specifically described below with reference to Examples and Comparative Examples, but the present invention is not limited only to these Examples.

Examples 1 to 13 and Comparative Examples 1 to 6 Residual fuel oil was prepared using residual oil obtained by visbreaking lubricant oil as pyrolysis residual oil and using cracked cycle oil as a diluent. .

Note that the amount of diluent added and the viscosity in SaC are 30% and 220 cst for residual fuel oil a, respectively.

The residual fuel oil content is 40%, 110 cst. The following dispersion additives were used. The amount added is as shown in Table 1.

Dispersion additive> Additive A: Cj, 2H25-0-fCH20H20
+￥CH2CjH20H2NH2B: OH-0-f
cH2CH2CH2N)7Hc: s-o-cg2a
H2cH2NH2 (a mixture in which R is an alkyl group having 12 to 15 carbon atoms) D: R-containing C1 (20H2C) 12NgarH (a mixture in which R is an alkyl group having 12 to 15 carbon atoms) E" Cl2H25-containing CjH2C, H2CH2N crucible H
F: Ff-0-OH20H2CH2NH2 (W is a residue of Guerbet alcohol with 52 carbon atoms) C1: R#-0-CH2CH2C)12NH2 (a mixture where R' is a residue of a synthetic alcohol with 20 to 30 carbon atoms) H: Calcium petroleum sulfonate! =Sorbitan monooleate Among the above additives, A to G are additives of the present invention, and H and I are conventional additives.

An evaluation test for residual fuel oil was conducted using the method described below, and the results are shown in Table 1.

Evaluation test method for residual fuel oil: Spot test method and filtration test method (5hell Hot Filtration7
est).

For spot tests, please refer to “Mekata Review”.

Vol 25, I64, pages 212-215.

(1) Add additives to residual fuel oil, heat to 1ooc and stir well.

(21) Take a sample with a glass rod and drop it onto Sono-mt-filter paper (Toyo Roshi A30).

(31100CI' ASTM D 278 after 1 hour standing)
The state of the spot ring is determined according to the six-stage classification described below based on 1.

Suboc) The IJ song price standard is as follows.

Jt61゛: There is no inner ring and the spot is homogeneous.

Flat 2: Thin or slightly visible inner ring.

A3...A thin inner ring appears, but the background is slightly darker.

Flat 4...The thickness is increased compared to the flat 3 inner ring,
The background is much darker.

A5: There are particles in the center of the inner ring, and the ground is very dark.

I66: The entire inner ring is dark and thick with particles.

Filtration test methods are described in the September 1951 issue of the Journal of the Institut A.
The dry sludge content was determined by this method, as described in J.D., Volume 37, No. 353, pages 596-604.

Table 1 [Effects of the Invention] The additive for residual fuel oil of the present invention can preferably disperse components such as asphaltenes in pyrolysis residual oil6.
Generation of sludge can be prevented. As a result, when the residual fuel oil containing the additive of the present invention is used, various troubles due to the generation of sludge can be avoided.

Claims (1)

[Claims] 1. The following general formula ▲ Numerical formulas, chemical formulas, tables, etc. ▼ (1) (However, R_1 is a hydrocarbon group having 8 to 36 carbon atoms, R_2
, R_3, R_4 represent a hydrogen atom or a hydrocarbon group having 8 to 22 carbon atoms, R represents an alkylene group having 2 to 4 carbon atoms,
(n represents an integer of 0 to 9, m represents an integer of 0 to 15) An additive for residual fuel oil comprising a compound represented by the following.