JPS6011995B2 - Production method of altered kerosene - Google Patents

Description

[Detailed description of the invention] The present invention relates to a method for producing denatured oil obtained by denaturing kerosene.

In order to investigate the combustion characteristics, lifespan, etc. of combustion equipment that uses Z-kerosene as fuel, a method of evaluating the combustion of degraded kerosene as an accelerated test is being explored. The altered oil used here has conventionally been produced by heating kerosene, blowing air into it, irradiating it with ultraviolet rays, or exposing it to an environment that degrades the kerosene.

However, all of these methods take a long time, from two weeks to more than a year, to obtain altered oil.
There were drawbacks such as poor reproducibility and inability to obtain a desired degree of alteration. More specifically, the following methods were typical for obtaining altered kerosene for testing.

Heat to 180 qo or more and blow air into it. ■ Irradiates ultraviolet light and blows air. (3) Leave it outdoors.

According to methods [1} and [2], kerosene with a strong acid value (0.1 or more) can be obtained, so in order to make the acid value equal to that of ordinary degraded kerosene, which has an acid value of 0.01 to 0.03, It is diluted and used as a sample.

Method 3 involves changing the location of the kerosene, its container, and the number of days of exposure. In the case of these methods, it takes a long time to alter the quality, and the degree of alteration differs each time it is produced, so reproducibility is poor and it is not possible to obtain a product with a desired degree of alteration.

Therefore, the present inventors proposed a method of adding peroxide to kerosene as a method to eliminate the above-mentioned conventional disadvantages and to produce products of any degree of alteration in a short time and with good reproducibility. (Patent application No. 55-32286).

In this method, altered kerosene is obtained by reacting kerosene components with peroxides. As a result of the inventors' analysis of a large number of degraded kerosene collected on the market, most of them had an acid value of 0.01 to 0.0 and a peroxide value of 200 to 500.
It was 9/100 Z kerosene with a resin mass of 20 to 30.

On the other hand, with the previously proposed peroxide addition method, as shown in the following table, it was not possible to obtain a product with a content close to that of the modified kerosene on the market.

That is, as is clear from the table, the resin mass is small in all cases, and the alcohol value and peroxide value are also different. Therefore, even if a combustion test is conducted using such kerosene and results are obtained such as no tar being emitted, this does not necessarily mean that the same results will be obtained with degraded kerosene on the market. Therefore, the present inventors investigated peroxides and their alteration conditions in order to obtain altered kerosene having the same composition as altered kerosene on the market.

As a result, they found that by adding t-butylperoxy-2-ethylhexanoate, it was possible to easily create a synthetic altered kerosene having the same composition as the altered kerosene sold in large quantities on the market. The present invention will be explained below with reference to Examples. 1st
The figure shows normal, unaltered kerosene. of t-butylperoxy-2-ethylhexanoate (hereinafter referred to as BP)
This graph shows the relationship between the elapsed time when kerosene (expressed as EH) was added and heated to various temperatures in the atmosphere, and the peroxide value, acid value, and resin mass in kerosene. As is clear from the figure, the typical composition of degraded kerosene recovered on the market is a peroxide value of 200 to 500, and an acid value of 0.01 to 0.
03. To make altered kerosene with a resin mass of 20 to 30 M/100, the amount of BPEH added is 1. 60 if the weight% of
It can be seen that it is sufficient to heat at 0 to 70 for 2 to 4 hours, especially at 6530 for about 3 hours.

Next, an example in which the amount of BPEH added is changed will be explained.

FIG. 2 shows the relationship between the amount of BPEH added and the peroxide value, acid value, and resin mass when the heating temperature was 6yo and the heating time was 2 hours or 3 hours. As is clear from the figure, BPE
The amount of H added and the degree of alteration are almost proportional, but as the amount of BPEH added increases, the acid value increases significantly, so the amount of BPEH added should be 0.5 to 2. % by weight, particularly 1% by weight.

As described above, according to the present invention, it is possible to easily and reproducibly create a test-grade altered kerosene having an altered composition corresponding to the degraded kerosene on the market in a short time, thereby eliminating the need for a large amount of test-grade altered kerosene. This makes it possible to test the combustion characteristics, estimate the lifespan, and compare the lifespan of combustors, which will be of great help in the development of combustion equipment.

[Brief explanation of the drawing]

Figure 1 shows the relationship between elapsed time, peroxide value, acid value, and resin mass when kerosene containing 1% by weight of BPEH is heated at various temperatures. Figure 2 shows the relationship between BPEH when heated at 65 oo It is a figure showing the relationship between the amount of additive o, peroxide value, acid value, and resin mass. Figure 1 Figure 2

Claims (1)

[Scope of Claims] 1. A method for producing altered kerosene, which comprises adding 0.5 to 2.0% by weight of t-butylperoxy-2-ethylhexanoate to kerosene and heating the mixture. 2. The method for producing altered kerosene according to claim 1, wherein the heating conditions are a heating temperature of 60 to 70°C and a heating time of 2 to 4 hours.