JPS6026089A - Carbonaceous fuel oil - Google Patents

Abstract

PURPOSE:To improve the storability of a carbonaceous fuel oil and prevent the deposition of carbides effectively, by adding a surfactant in which a residue of org. phosphonic acid forms a hydrophilic segment, to the carbonaceous fuel oil. CONSTITUTION:A surfactant in which a residue of org. phosphonic acid forms a hydrophilic segment is added to a carbonaceous fuel oil. The surfactant are, e.g., glycerophosphonolipid of formula I (where R1 is a polar group-contg. hydrocarbon; R2 and R3 are long chain hydrocarbons; A is methylene or carbonyl) and sphingophosphonolipid of formula II (where R4 is a long-chain hydrocarbon). The base oil for the fuel oil includes gasoline, gas oil, mixed heavy oil, liquefied petroleum gas, and synthetic diester oil. The surfactant is used in an amt. of 0.01-5.0%. When the amt. is less than 0.01%, no effect is obtained, while when it exceeds 5.0%, the cost becomes too high.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fuel oil that prevents carbide from adhering to equipment.

Fuel oil such as automobile fuel is used at high temperatures and under superheated conditions. Under these conditions, the carbonaceous material that is the main component of fuel oil carbonizes, and the carbide adheres to the fuel inflow path and sliding parts, causing seizure and accelerating wear and tear on the equipment used. ing.

Japanese Patent Publication No. 31-10783 discloses that a surfactant containing an orthophosphoric acid residue having a C-〇-P bond is added to automobile gasoline to remove vaporizer deposits. is disclosed. However, although this surfactant effectively prevents the adhesion of carbides, it has poor storage stability.
It causes discoloration and deterioration over a long period of time.

The present inventors have completed the present invention as a result of intensive research in order to obtain a fuel oil that has good storage stability and effectively prevents the adhesion of carbides. That is, the present invention relates to a carbonaceous fuel oil containing at least one type of surfactant that forms a hydrophilic moiety of organic phosphonic acid residues.

In the surfactant used in the present invention, organic phosphonic acid residues are present in a part of the parent xylem. Typical examples of such surfactants include the following: CH~OA R2 Cl]2-〇=A-R.

In formula 1, R1 is a hydrocarbon containing a polar group, R2 and R3
represents a long-chain hydrocarbon, and A represents a methylene group or a carbonyl group. ] 1 R1 [wherein, R1 is a hydrocarbon containing a polar group, R2 and R4
represents a long chain hydrocarbon (R2 and R1 are different). ] Structural formula (1) is called glycerophosphonoglycolipid, and structural formula (2) is called sphingophosphobapide.

An example of R1 in the above surfactant is the chemical formula %. Examples of R2 and R3 include 12 to 1 carbon atoms;
8 saturated or unsaturated long chain hydrocarbon groups are common.

An example of R1 is the structural formula H 1 -C=(>(C112), 2CH3 Examples include long chain hydrocarbon groups such as.

In the fuel oil of the present invention, one type of surfactant listed in -11 may be used, or two types of surfactants may be used in combination.

The surfactants of the present invention include glycerophosphonoglycolipids.

Sphingophosphonoglycolipids are also glycerophosphonolipids,
It can be used as a type of sphingophosphonolipi F.

Examples of the base oil of the fuel oil of the present invention include gasoline,
Examples include light oil, 9 heavy oil, mixed coal heavy oil, liquefied petroleum gas, and diester synthetic oil.

The surfactant used in the present invention is 0.0% in the base oil.
1-5.0% by weight, preferably 0.01-1.0% by weight
It is preferable to contain. If the amount is less than o, oi% by weight, the effect of the fuel oil of the present invention will not be achieved. If it exceeds 5.0% by weight, it becomes economically expensive compared to its effectiveness. Moreover, if it adheres to containers or unnecessary items, cleaning becomes troublesome, and the viscosity of the base oil decreases significantly.

When the fuel oil of the present invention is used in automobiles, adhesion of carbides on carbonaceous base oils such as gasoline, diesel oil, and liquefied petroleum gas;
Burning is effectively prevented.

Furthermore, the fuel oil of the present invention has extremely good storage stability and is free from discoloration and deterioration.

The present invention will be explained in more detail with reference to Examples.

% in the examples represents weight % unless otherwise specified.

Examples 1 to 4 The adhesion of carbides and storage stability of fuel oils having the following blending amounts were investigated. The results are shown in Table-1.

Blend amount of Example 1 Ingredients % Heavy oil 75.0 Carbon powder 24.5 1) Surfactant A 0. 5 Ingredients blended in Example 2 % Heavy oil 75.0 Carbon powder 24.5 Surfactant A O, 25 2) Surfactant B 0025 Ingredients blended in Example 3 % Light oil 75.0 Charcoal Base powder 24.5 Surfactant B 0. 5 Blend amount of Example 4 Ingredients % Light oil 99.5 Surfactant B 0. 5 1) A surfactant having an infrared absorption spectrum shown in FIG.

2) A surfactant having an infrared absorption spectrum shown in FIG.

In the experiment, a fixed electrode was opened and closed 50,000 times using a movable electrode in fuel oil having the formulation described in 1.

A voltage of 12 volts was applied between the electrodes and the current was 10 amperes. In this experiment, the contact resistance before the test was 50,
The contact resistance after opening and closing 50,000 times and the presence or absence of carbide adhesion to the electrodes after opening and closing 50,000 times were investigated.

In Experiment 2, 200g of the material was placed in a glass bottle and the odor and color changes were examined after it was left outdoors for two years.

Comparative Example 1 As a representative example of an orthophosphoric acid residue-containing glycerophospholipid having the structural formula: % formula %, a test similar to that of the example was conducted using acetone-purified soybean lecithin. The blending amount is 75% heavy oil, 2.
1.5% and acetone-purified soybean lecithin 0.5%. The results are shown in Table-1.

Comparative Examples 2 to 4 Tests similar to those in Examples were conducted using products that did not contain a surfactant. In Comparative Example 2, heavy oil was 75%;
The carbon powder was 25%, and in Comparative Example 3, the heavy oil was 100%. The results are shown in Table-1.

(Hereinafter, blank spaces) As shown in Table 1, even if the fuel oil of the present invention is carbonized by applying an electric arc, carbides are dispersed in the automotive fuel oil, and 11 particles are formed on the metal surface of the electrode, bra, or tink surface. hard. It can also be seen that it has excellent storage stability after being left outdoors for two years.

On the other hand, in Comparative Example 1, it can be seen whether the storage stability is poor or not. In fact, the odor of the oil changed and oxidation began to progress several days after it was left unused.

In addition, in fuel oils other than those of the present invention, carbide deposition was noticeable, and the contact resistance increased by a factor of 1.

[Brief explanation of drawings]

FIG. 1 shows an infrared spectrum of glycerophospho/lipid used in an example of the present invention, and FIG. 2 shows an infrared absorption spectrum of glycerophospho/lipid used in an example of the present invention/a substance different from that shown in FIG. If a patent is issued! ／＜ Tokai Rika Deniso Seisakusho Co., Ltd.
Reason! (Patent attorney Aoyama Ao: h h= 2 people Figure 1 3500 3001) 2500 2000 +1aω
16 (Xl 1400 1200 1001) 80
0 length C-7 Figure 2

Claims (1)

[Claims] 1. A carbonaceous fuel oil containing at least one surfactant in which organic phosphonic acid residues form a hydrophilic part. 2. The fuel oil according to item 1, wherein the surfactant is glycerophospho7lipid. 3. The fuel oil according to item 1, wherein the surfactant is a sphingolipid. 4. The first containing O, Of ~ 5.0% by weight of surfactant
The fuel oil according to any one of items 1 to 3.