KR960007738B1 - Diesel fuel oil composition - Google Patents

Abstract

The diesel fuel oil compd. comprises general diesel oil having the boiling point of 150-400 deg. C, metal additive and its stabilizing agent. The metal additive consists of a aliphatic acid metal salt selected from Li, Na, Fe, Co, Ni, Ce, Mo, W and La. The aliphatic acid has 3-50 carbons and added to the diesel fuel oil in 10-1,000 ppm. The stabilizing agent of the metal additive is selected from the groups of aliphatic amine having 4-24 carbons, ethoxy compd. of fatty amine, propoxy compd. of fatty amine, fatty diamine, amine polymers of 500-10,000 molecular weight, aliphatic acid of 4-24 carbons, and aliphatic alcohol of 3-24 acrbons. These stabilizing agent is added to the diesel fuel oil in 10-2,000 ppm.

Description

Improved Diesel Fuel Oil Composition

The present invention relates to an improved diesel fuel oil composition which improves the stability in diesel of a metal catalyst added to diesel to improve the combustion performance of diesel and to reduce harmful particulate matter, soot, and the like emitted to exhaust gas.

Particulate matter emitted by exhaust gas from diesel vehicles is unburned carbon particles with an average diameter of about 0.3㎛, and it causes not only visually unpleasant feelings when exceeding environmental standards, but also harmful substances such as cancer when entering the human body. to be.

U.S. Patent Nos. 4,207,078, 4,222,746, 3,559,312 and 3,413,102 describe diesel additives that can improve the combustion performance of diesel and reduce emissions of fumes and particulate matter. Organometallic compounds are used as catalysts. However, barium, lead and other organometallic compounds can activate diesel combustion and significantly reduce particulate emissions, but when exposed to a certain concentration in the atmosphere, they are considered as heavy metals that are harmful to humans. Due to the possibility of causing pollution is limited in use.

U.S. Patent Nos. 4,568,357 and 4,655,037 describe a method of using an organometallic catalyst as a diesel additive, installing a filter trap, filtering and collecting particulate matter, and then burning particulate matter with additives. Cerium fatty acid sensitizers such as octylic acid cerium naphthenic acid improve combustion performance in the combustion cylinder, reducing the generation of particulate matter, and lowering the temperature at which the particulate matter filtered and ignited in the filter trap is ignited. In addition, it is reported that the possibility of secondary pollution due to the release of metal to air is very low.

However, there is no problem in dissolving cerium fatty acids such as ceroctylic acid and cerium naphthenic acid in diesel at a concentration of about 10 ppm to 10,000 ppm, but if left for more than two weeks, a cerium precipitate that does not dissolve in diesel is formed in the tank. There is a buildup defect. The formation of the cerium precipitates is affected by various factors such as the moisture and oxygen content in the diesel and the temperature of the diesel. If the cerium precipitates are excessively formed in the tank bottom, the cerium concentration in the diesel becomes very uneven. The present inventors have observed that the cerium concentration in the fuel tank is very severe as a result of several tests using cerium fatty acid additives such as cerium octylic acid and cerium naphthenic acid. In addition to cerium additives, fatty acid salts of alkali metals such as lithium and sodium, and salts of lanthanide-based metals such as lanthanides such as carboxylates of transition metals such as iron, cobalt, nickel, molybdenum and tungsten, and lanthanum Found that metal precipitates formed when stored for more than 6 months.

The present inventors conducted intensive research for the purpose of resolving these disadvantages, and have developed a stabilizer that can stabilize the metal additive in diesel. When these stabilizers were applied to diesel at about 10ppm to 2000ppm, no metal precipitates were formed even after prolonged storage for more than 6 months, and the concentration of metal in diesel was maintained even during aberration tests. The present invention has been completed based on the development of a stabilizer capable of stabilizing the metal additives added in diesel.

The composition of this invention consists of (1) normal diesel oil, (2) metal additive, and (3) stabilizer which can stabilize the said metal additive. As the metal additive (2), a metal fatty phase composed of fatty acids having 3 to 50 carbon atoms, such as metal naphthenic acid and metal octylic acid, may be used.

Stabilizers capable of stabilizing the metal additives include: 1) Patiamine having 4 to 24 carbon atoms 2) Ethoxy compound of patamine 3) Propoxy compound of patamine 4) Patidiamine 5) Molecular weight of 500 to 10,000 One or more compounds selected from the group consisting of polymeramines, 6) fatty acids having 3 to 24 carbon atoms and 7) aliphatic alcohols having 3 to 24 carbon atoms can be selected and used. Its addition amount depends on the concentration of the metal additive, but 10ppm to 2000ppm of the final composition, preferably 10ppm to 1000ppm is effective. The concentration of the metal additive added to the diesel is 10ppm to 1000ppm of the final composition and the target diesel is a conventional diesel having a boiling point range of 150 ° C to 400 ° C, and there is no particular limitation.

Although the configuration and effects of the present invention will be described in detail with reference to the following examples, the following examples do not limit the scope of the present invention.

Examples 1-3 and Comparative Examples 4-5

A glass tube with an inner diameter of 4cm and a length of 20cm is washed with chromic acid solution, three times with distilled water and once with acetone, and dried in air. Boiling point is filtered through diesel filter No. 1 of the filter as shown in Table 1 below and put 150g each glass tube.

To each glass tube was administered metal fatty acid in the kind and amount of the following Table 2, and hexanoic acid as a stabilizer was administered in the amount shown in Table 2 and mixed, and then closed with a cork cap and left at 25 ° C. Diesel was observed every 7 days to observe the formation of sediment, the properties after 12 weeks are shown in Table 2 below.

Examples 6-9 and Comparative Examples 10-12

Using the octadecylamine or 2-ethylhexyl alcohol as a stabilizer and in the same manner as in Examples 1 to 3 were prepared the same sample (Examples 6 to 9) as described in Table 3 below.

After leaving each sample, the precipitate is removed by passing through clean white filter paper No. 1 at intervals of 20, 40, and 60 weeks. The mother liquor is analyzed for metal content by ion coulpled plasma spectroscopy (ICP). The results are shown in Table 3 below.

In addition, for the purpose of comparison with the above Example 3 was prepared in the same manner as in the above-described comparison as in Comparative Example of Table 3 to prepare a sample and measured in the same manner as the above-described method shown in Table 3.

Claims (7)

An improved diesel fuel oil composition comprising (1) a normal diesel oil, (2) a metal additive, and (3) a stabilizer capable of stabilizing the metal additive. 2. The improved diesel fuel oil according to claim 1, wherein (2) the metal additive is one metal fatty acid salt selected from the group consisting of Li, Na, Fe, Co, Ni, Ce, Mo, W and La. Composition. 3. The improved diesel fuel oil composition according to claim 1 or 2, wherein (2) the metal additive is a C3-C50 metal fatty acid salt. 2. The improved diesel condensed milk composition according to claim 1, wherein (2) the metal additive is contained in an amount of 10 to 1,000 ppm. 2. The stabilizer according to claim 1, wherein (3) the stabilizer is 1) a polythiamine having 4 to 24 carbon atoms, 2) an ethoxy compound of a patinamine, 3) a propoxy compound of a patinamine, 4) a patidiamine, and An improved diesel fuel oil composition, characterized in that one or more compounds are selected from the group consisting of polymeramines of ˜10,000, 6) fatty acids having 4 to 24 carbon atoms and 7) aliphatic alcohols having 3 to 24 carbon atoms. 6. The improved diesel fuel oil composition according to claim 1 or 5, wherein (3) the stabilizer is contained in 10 to 2000 ppm. The improved diesel fuel oil composition according to claim 1, wherein the diesel oil has a boiling point of 150 to 400 ° C.