Microwave-assisted coal extraction method through ethanol

A microwave-assisted, ethanol technology, applied in the petroleum industry, solid fuel, fuel and other directions, can solve the problems of long extraction time, low efficiency, high energy consumption, etc., and achieve a short extraction time, high efficiency and high economic benefits. Effect

Inactive Publication Date: 2009-11-04
XIAN UNIV OF SCI & TECH
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Problems solved by technology

However, the methods of solvent extraction of coal currently used have defects and deficiencies such as long extraction time, low efficiency, and large energy consumption to varying degrees.

Method used

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  • Microwave-assisted coal extraction method through ethanol

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Experimental program
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Effect test

Embodiment 1

[0035] Such as figure 1 As shown, the microwave-assisted ethanol extraction method of coal of the present invention comprises the following steps:

[0036] Step 1. Coal sample crushing: use a pulverizer to crush the coal sample to be treated and dry it for later use, and the crushed particle size is 150-75 μm. The coal sample to be processed is long-flame coal, specifically long-flame coal that meets the standard GB5751-86 of "China Coal Classification".

[0037] In this embodiment, the coal sample to be processed is specifically Shenfu coal. In actual operation, the coal sample to be treated is pulverized and dried, and stored in a brown bottle for later use.

[0038] Step 2, coal sample demineralization treatment: the pulverized coal sample is subjected to conventional demineralization treatment and dried to obtain a demineralized coal sample. The drying described in this step is carried out in a vacuum drying oven, and the drying temperature is 105±5°C, and the drying ti...

Embodiment 2

[0056] The difference between this embodiment and Embodiment 1 is that the coal sample to be treated in Step 1 is specifically Tongchuan coal.

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Abstract

The invention discloses a microwave-assisted coal extraction method through ethanol, which comprises the following steps of: firstly, crushing of a coal sample; secondly, mineral removal treatment of the coal sample; thirdly, microwave-assisted extraction, namely weighing the coal sample to be treated, a catalyst and a solvent, adopting a microwave digestion/extraction instrument for microwave-assisted extraction, and taking out an extraction tank which is filled with a solid and liquid mixture; fourthly, centrifugal separation, namely using a low-speed centrifuge to centrifugally separate the solid and liquid mixture, and separating an extract solution consisting of an extract and the solvent from coal residue; and fifthly, subsequent treatment, namely adopting a rotary evaporator to separate the extract solution, separating the extract from the solvent, performing vacuum drying on the extract, storing the extract for standby, and using water to wash the coal residue to be clean, and storing the coal residue for standby. The invention has the advantages of simple compositions of the production line, simple and convenient extraction method, short extraction time, low energy consumption, non pollution, good extraction effect, and capability of improving the extraction rate of coal extraction through the ethanol from the conventional 10 percent to 30-40 percent.

Description

technical field [0001] The invention belongs to the field of coal processing application technology, in particular to a method for microwave-assisted ethanol extraction of coal. Background technique [0002] Coal will be the main source of energy in my country for quite a long time, so controlling and mitigating the adverse impact on the environment caused by coal utilization is the need for my country's sustainable development. Correspondingly, the efficient and clean conversion of coal is the main way to achieve this sustainable development, so it is urgent and important to develop environmentally friendly coal processing technology. [0003] It has been found through research that solvent extraction of coal can enrich and purify the effective components in coal in a targeted manner, and can effectively control harmful components such as sulfur and nitrogen, so that the directional conversion of coal can finally be realized, so the use of Solvent extraction of coal is a g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L9/00C10L5/00
Inventor 葛岭梅陈红李建伟
Owner XIAN UNIV OF SCI & TECH
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