JPS6286092A - Light diesel oil composition - Google Patents

Abstract

PURPOSE:To reduce the particulate formation and, at the same time, to improve the storage stability of a light diesel oil, by incorporating a polyethylene compd. and a particular amide compd. as essential components. CONSTITUTION:To 100pts.wt. light diesel oil are added 0.01-2.0pt.wt. polyethylene compd. (A) and 0.05-2.0pts.wt., based on the component A, amide compd. (B) as essential components. The component A is a polyethylene compd. represented by formula I. In the formula I, R1 is a 12-18 C alkyl or alkenyl; X is H or a group represented by formula II; and a is an integer of 2-15 when X is H, and a and b are each a positive integer satisfying the equation a+b=2-5 when X is a group represented by the formula II. The component (B) is an amide compd. represented by formula III. In the formula III, R2, R3, and R4 are each H or a 12-30 C alkyl, provided that at least one of R2'R4 are each an acyl; R5 is a 2-4 C alkylene; and c is an integer of 2-7.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a diesel light oil composition, and more particularly to a diesel light oil composition that produces less patyanilate and has excellent storage stability.

[Background of the Invention] Currently, regarding exhaust gas from diesel engines in Japan, the emissions of HC, Co, No, and black smoke are regulated. In contrast, in the United States, small diesel engines are regulated based on the weight of particulate emissions instead.

Note that particulates are fine particles contained in exhaust gas, and their constituent components are hydrocarbon components with a relatively high boiling point produced by the partial combustion of carbon particles and fuel r1. At the same time, measures to reduce black smoke and IC11 degrees are also important.

As particulate reduction measures, a method is currently being devised to collect particulates by installing a ceramic filter in the middle of the exhaust pipe. However, this method has the disadvantage that particulate matter accumulates in the filter as the operation continues, resulting in increased back pressure. Additionally, devices are being developed that automatically burn off the accumulated soot using catalysts, burners, etc., but the control mechanism is extremely difficult, and there are additional problems associated with this, such as increased weight and cost. Therefore, there has been a need for an easy and inexpensive method for reducing particulates.

The present inventors focused on this measure to reduce particulates,
Easy and inexpensive Padicule-1~
As a result of repeated research to invent a method to reduce particulates in exhaust gas, we first developed a method to reduce the amount of particulates in exhaust gas by using diesel oil, which is made by adding a specific polyoxyethylene compound as an essential component, as fuel for diesel engines. Patent application filed in 1987-107 to discover that it is possible to significantly reduce
No. 836).

However, subsequent research has shown that diesel light oil contains the polyol.
Diesel light oil compositions containing xyethylene compounds have an extremely excellent effect on reducing particulates in exhaust gas, but there are problems with their storage stability, and if these diesel light oil compositions are stored for a long period of time, sludge may be generated in some cases. I found out that it does.

Therefore, the present inventors improved the above-mentioned invention and conducted repeated research to develop a diesel light oil composition that has an excellent effect of reducing particulates in exhaust gas and also has excellent storage stability. The present inventors have discovered that an excellent diesel light oil composition can be obtained by using a specific amide compound in combination, and have completed the present invention.

[Object of the Invention] An object of the present invention is to provide a diesel light oil composition that generates less particulates in exhaust gas and has excellent storage stability.

[Structure of the Invention] The present invention provides the following steps: 1. For 100 parts by weight of diesel light oil, (8) general formula [wherein R1 is carbon r! 112-18 alkyl group or alknyl group, X is a hydrogen atom or the general formula +CH2
A group represented by CH20+-TH, and when X=H, a
is an integer of 2 to 15, and when X-+CH2CH2O+-TH, a and b are positive integers of a+b-2 to 15, respectively] 0.0
1 to 2.0 parts by weight, and (B) general formula [wherein R, R3 and R4 may be the same or different and each represents a hydrogen atom or an acyl group having 12 to 30 carbon atoms, and R2- One of R4 is a 7-syl group, and R5 is an alkylene group having 2 to 4 carbon atoms, C
represents a number from 2 to 7, respectively] 0.05 to 2 of component (8)
．． The present invention provides a diesel light oil composition in which 0 times by weight is added as an essential component.

The content of the present invention will be explained in more detail below.

E. Light oil of the present invention] Diesel light oil as used in the present invention is a petroleum fraction used as a fuel for diesel engines, for example, oil with a boiling point range of about 180 to 380°C, and has a boiling point range of 1 to 3 as specified in JIS K2204. A typical example is light oil.

(Polyoxyethylene compound of the present invention) In the present invention, (
The polyoxyethylene compound of component 8) is a compound represented by the general formula. In the formula, R1 has 12 to 12 carbon atoms.
18 alkyl or alkenyl group, X is a hydrogen atom or a group represented by the general formula +CH2CH2O+-1i-H, and when X=l-1, a is an integer from 2 to 15,
=+C)-120H20←When [1], a and b are a+
Positive integers from b=2 to 15 are shown, respectively.

That is, the polyoxyethylene compound as used in the present invention includes compounds represented by the following two general formulas.

(1) R1-N l-1+Cl-120H20+T
-H [In formula (1), R1 represents an alkyl group or alkenyl group having 12 to 18 carbon atoms, and a represents an integer of 2 to 15, respectively. ] [In formula (2), R1 represents an alkyl group having 12 to 18 carbon atoms or a positive integer such that alkenyl = 2 to 15, respectively] In the above m J and formula (2), the alkyl group and alkenyl represented by R1 Specific examples of the group include dodecyl group, tridecyl group, tetradecyl group, pentadecyl group, hexadecyl group, heptadecyl group, octadecyl group, dodecenyl group, tetradecenyl group, hexadecenyl group, octadecenyl group, dodecagenyl group, hexadecagenyl group. basis,
Examples include octadecagenyl group, ophtadetrienyl group, octadecatetraenyl group, and the like.

(Amide Compound of the Present Invention) The amide compound of component (8) in the present invention is a compound represented by the general formula. In the formula, R, R3 and R4 may be the same or different and each represents a hydrogen atom or an acyl group having 12 to 30 carbon atoms, preferably 16 to 22 carbon atoms, and at least one of R2-R4, Preferably at least two are acyl groups. Also, R5 has 2 to 2 carbon atoms.
4 represents an alkylene group, and C represents a number from 2 to 7, respectively.

Above R. The monoacyl represented by R and R4 has the general formula R -C- (wherein, R6 has 11 carbon atoms)
-29, preferably 15-21 alkyl or alkenyl group), and preferable acyl groups include, for example, hexadecanoyl group (balmitoyl group), heptadecanoyl group , octadecanoyl group (stearoyl group), nonadecanoyl group, eicosanoyl group, heneicosanoyl group, dodecenyl group,
Examples include octadecenoyl group (oleoyl group).

On the other hand, as the alkylene group represented by R5,
Specific examples include ethylene group, propylene group, trimethylene group, butylene group, methyltrimethylene group, and tetramethylene group.

The amide compound that is component (B) of the present invention may be a mixture, and is usually obtained by amidating the amino group of a polyalkylene polyamine with a fatty acid. Preferred polyalkylene polyamines include, for example, diethylenetriamine, triethylenetetraamine, tetraethylenepentamine, tetrapropylenepentamine, pentaethylenehexazine, hexaethylenehebutamine,
Examples include hexabutylene hebutamine, hebutaethylene octamine and mixtures thereof, and triethylenetetramine, tetraethylenepentamine and mixtures thereof are more preferred. On the other hand, preferred fatty acids include hexadecanoic acid, palmitic acid, heptadecanoic acid, octadecanoic acid, stearic acid), nonadecanoic acid, eicosanoic acid, hen-eifanoic acid, tocosanic acid, octadecenoic acid, oleic acid), and mixtures thereof. can give. In addition, the ratio of polyalkylene polyamine and fatty acid in the amidation reaction is 1 mole or more, preferably 2 mole or more of fat per 1 mole of polyalkylene polyamine, and up to 5 moles of nitrogen atoms in the polyalkylene polyamine. It is.

(Addition of components (A) and CB to diesel light oil) In the present invention, the amount of the polyoxyethylene compound (8) added is 100ffiff1 of diesel light oil.
0.01 to 2.0 parts by weight, preferably 0.0 parts
5 to 0.5 weight/1 part. If the amount added does not reach 0.0141 parts, the effect of reducing Patty V Nire 1~ in the exhaust gas of diesel engines will not be obtained much, while if the amount added exceeds 2.0 parts by weight, addition (6) This is undesirable because it does not produce an effect commensurate with that and leads to increased costs.

On the other hand, the amount of the amide compound (B) added is 0.05 to 2 of the amount added of the polyoxyethylene compound (^) component.
．． 0 times by weight, preferably 0.1 to 0.5 times by weight.

(8) If the amount of component added does not reach 0.055 weight of component (Δ), the effect of improving storage stability will not be obtained much;
On the other hand, if the amount of component (B) added exceeds 2.0 times the weight of component (^), the effect commensurate with the amount added cannot be obtained,
This is not desirable because it leads to increased costs.

(Diesel light oil composition of the present invention) In the diesel light oil composition of the present invention, the method for adding the polyoxyethylene compound (8) component and the amide compound (B) component to the diesel light oil is arbitrary. Each component may be added to diesel light oil separately, or both components may be mixed in advance and optionally diluted with receiver kerosene, diesel light oil, aromatic solvents, etc. to form an additive concentrate. , this additive may be added to diesel gas oil in the form of a concentrate.

For use in diesel engines, which has the effect of reducing particulates in diesel engine exhaust gas by adding specific amounts of a specific polyoxyethylene compound and a specific amide compound to diesel oil according to the present invention, and has excellent storage stability. A fuel composition is obtained, and at this time, known fuel additives such as a cetane number improver, an antioxidant, a metal deactivator, a corrosion inhibitor, etc. may be added as necessary. Details of these known additives are described in, for example, "Petroleum Product Additives" (Saiwai Shobo), edited by Toshio Sakurai.

[Effects and Advantages of the Present Invention] Furthermore, by using a composition in which specific amounts of a specific polyoxyethylene compound and a specific amide compound are added to diesel oil according to the present invention as a fuel for a diesel engine, ordinary diesel oil can be used as a fuel. Particulate matter in the exhaust gas of diesel engines can be significantly reduced compared to when

At the same time, it also has the effect of reducing the amount of carbon monoxide and unburned hydrocarbons in the exhaust gas.

[Example] Next, the present invention will be explained in more detail with reference to Examples and Comparative Examples. However, the present invention is not limited to the following embodiments unless the gist thereof is changed.

Examples 1 to 6 and Comparative Examples 1 to 3 A predetermined amount of a polyoxyethylene compound (A) and an amide compound (B) shown in Table 1 were added to diesel light oil (boiling point 180 to 350°C) to produce a diesel oil of the present invention. Gas oil compositions were obtained (Examples 1 to 6).

This composition was subjected to the following particulate generation test and storage stability test to evaluate its performance, and the results are also listed in Table 1.

(Particulate generation test) Combustion chamber type: vortex chamber, nozzle type: throttle type, using an engine with an exhaust of 512,200cc, at a vehicle speed of 501/h
r, after driving 1.0001m under flat road conditions, F
ederal Register Vol 45. )
4o, 45 (March 5゜1980) 40C
FI? Exhaust gas was passed through the filter for 5 minutes according to the method described in PART 8G, and particulates were collected. This filter is kept at constant temperature (25℃) and constant humidity (60%).
After holding the filter for 18 hours, the weight was measured using a microbalance, and the weight was determined by subtracting the weight of the filter.

(Storage Stability Test) 100 d of diesel gas oil composition was sampled in a test tube, corked and left in a dark place for 2 months, and then the weight of the generated sludge was measured.

For comparison, the same performance evaluation was conducted for the case where neither (A) nor (B) components were added (Comparative Example 1) and the case where the (B) component was not added (Comparative Examples 2 and 3). are also shown in Table 1.

From the results in Table 1, it can be seen that the diesel light oil compositions of the present invention (Examples 1 to 6) have a lower amount of Patiyanilate in the exhaust gas than the case where the (A) and CB) components are not added (Comparative Example 1). decreases, and when only component (A) is added (
The storage stability is significantly improved compared to Comparative Examples 2 and 3), and its superiority is clear.

Claims (1)

[Claims] 1. For 100 parts by weight of diesel light oil, (A) General formula ▲ Numerical formula, chemical formula, table, etc. ▼ [In the formula, R_1 is an alkyl group or alkenyl group having 12 to 18 carbon atoms, X is a hydrogen atom or the general formula -(CH_
2CH_2O)-_bH, or X=H
When a is an integer from 2 to 15, X=-(CH_2CH_2
O) 0.01 to 2.0 parts by weight of a polyoxyethylene compound represented by -_bH, a and b each represent a positive integer such that a+b=2 to 15], and (B) general formula ▲ mathematical formula, chemical formula , tables, etc. ▼ [In the formula, R_2, R_3 and R_4 may be the same or different and each represents a hydrogen atom or an acyl group having 12 to 30 carbon atoms, and R_2 to R_
At least one of 4 is an acyl group, R_5 represents an alkylene group having 2 to 4 carbon atoms, and c represents a number of 2 to 7, respectively. ] The amide compound represented by 0.05 to 2 of component (A)
．． A diesel light oil composition containing 0 times by weight added as an essential component.