JPS5811916B2 - Coal liquefaction method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a coal liquefaction method characterized by chemical treatment without high temperature and high pressure, that is, by oxidizing solid coal with a solvent to produce a coal liquefied product.

Traditionally, when converting coal into liquefied hydrocarbon products such as gasoline, diesel oil, penzole, and phenol, the coal is carbonized under high temperature and pressure to extract coal tar, and this coal tar is distilled and fractionated using a tar distillation device. It was generally done by

However, with this technology for producing coal tar by carbonization, the equipment becomes large and the release rate of coal tar is only 25% of coking coal, so the liquefaction rate of coal is considered to be extremely low. Converting coal to liquefied organisms is extremely unprofitable.

In addition to the above-mentioned high-pressure carbonization method, conventional methods include hydrogenation methods, but all of these methods require processing steps at high temperatures and high pressures, so they are currently uneconomical and cannot be commercialized.

The purpose of this invention is to provide a coal liquefaction method that can convert most of the coking coal (approximately 95%) into coal liquefaction. After that, the granular coal in which the solvent has permeated is dried, and then this dry granular coal is crushed into a desired mesh, a solvent is added to the pulverized coal, and the pulverized coal is boiled at a predetermined temperature in a heated pot for a desired period of time to form the coal. It is designed to produce a liquefied product.

Here, liquefied coal refers to liquefied coal by oxidizing it.

Next, a specific example of this invention method will be explained.

First, raw coal such as lignite, lignite, and bituminous coal is crushed into small particles of about 3 mm using a crusher, and the coal particles are mixed with pure water, a mixed solvent of sodium hydroxide, and phenol for about 10 minutes.
000:1 for about 50 hours.

At this time, the coal particles being immersed are stirred if necessary.

Next, the coal particles that have permeated the solvent are separated and collected from the solution, and dried in the sun or with a drying device to make the coal particles easier to disintegrate.

Thereafter, the dried coal particles are milled to produce a fine powder of about 150 mesh.

Then, 10 kg of the above pulverized coal was added to 8 kg of pure fishing rod into a solution in which 7 g of a solvent made by mixing a mixture of carboxylic acid such as acetic acid and acetaldehyde with a mixture of ethanolamine and acetic acid at a ratio of 4:3 was added. The mixture is stirred and mixed, and the mixture is boiled down at a constant temperature for a desired period of time in a heating pot such as a pressure cooker.

The heat treatment temperature at this time is about 120° C., and the heat treatment time is about 2 hours.

Moreover, it goes without saying that the heat treatment time varies depending on the amount of pulverized coal.

When heat-treated in this manner, the coal is oxidized by the solvent and transformed into a tar-like substance, producing a liquefied coal.

Furthermore, if hydrogen or the like is added to this coal liquefied product depending on the hydrocarbon product, it becomes possible to convert it into products such as light oil, penzole, and naphthalene.

As described above, according to the method of this invention, unlike the conventional high-pressure carbonization method, high temperature and high pressure are not required, and the equipment itself used is very simple.Furthermore, the manufacturing process can be reduced. Since it is considered to be extremely simple, inexpensive coal liquefaction treatment will be achieved.

Specific examples of the method of the present invention are as follows.

Example Lignite coal was crushed into small particles of about 3 mm using a crusher, and this was placed in a solution of about 10,000:1 mixed solvent of pure water, sodium hydroxide, and phenol.
It was soaked for 0 hours.

Next, after taking out the coal grains and drying them well in the sun,
The coal was made into pulverized coal of approximately 150 mesh using a flour mill.

1.0 g of the above pulverized coal was added to 8 kg of pure water and 7 g of a solvent made by mixing a mixture of acetic acid and acetaldehyde with a mixture of ethanolamine and acetic acid at a ratio of 4:3.
kg was added and mixed with stirring, and the mixture was boiled down in a pressure cooker at a temperature of about 120° C. for about 2 hours.

As a result, 9.50 kg of oil was obtained, and the liquefaction rate of the coal was approximately 95%.

Claims (1)

[Claims] 1 A step of immersing crushed granular coal in a solvent made by adding a mixture of sodium hydroxide and phenol to pure water for about 50 hours, a step of drying the granular coal that has permeated with the solvent during this immersion step, A milling process in which dry granular coal is pulverized into a fine powder of about 150 mesh.For 10 kg of this pulverized coal, 8 kg of pure fishing rod, a mixture of a carboxylic acid such as acetic acid and acetaldehyde, and a mixture of ethanolamine and acetic acid are added to 4: A coal liquefaction method comprising a heating step of mixing 7 g of a solvent mixed at a ratio of 3:3 into a mixed solution and heating the mixture at a temperature of about 120° C. to generate a coal liquefied product.