Solvent and method for removing resin from lignite wax by virtue of crystallization process

A technology of montan wax and crystallization method, which is applied in the recovery/refining of mineral wax and the petroleum industry, etc. It can solve the problems of difficult resin removal and inability of solvent to fully enter the inside of particles, and achieves short processing time, little harm to human body, and ecological protection. Environmentally harmless effect

Inactive Publication Date: 2015-01-28
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
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  • Claims
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Problems solved by technology

[0007] The purpose of the present invention is to provide a solvent and method for removing resin in montan wax by crystallization, so as to solve the problem that the existing montan wax deresin adopts solid-liquid extraction method, and the solven

Method used

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  • Solvent and method for removing resin from lignite wax by virtue of crystallization process

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Embodiment 1

[0018] Embodiment 1: a kind of montan wax deresinization method with cyclohexane as solvent, concrete steps are:

[0019] Take 1 ton of montan wax particles with a resin content of 28.3% and a particle size of less than 10mm, place the montan wax particles in a jacketed crystallization kettle, and inject cyclohexane solvent into the crystallization kettle using a solvent pump, the montan wax particles and cyclohexane solvent The ratio of material to liquid is 1:35, stirring, heating (steam goes through the jacket), the pressure is controlled at 2.0MPa, and the heating is maintained for 20 minutes. Cut off the water vapor, add cooling water to the jacket of the crystallization kettle to cool the solution in the crystallization kettle, keep the temperature of the solution in the crystallization kettle at 20°C, and cool and crystallize for 30 minutes. Use a circulating water vacuum pump to perform suction filtration to separate the filter residue from the solution, and dry the ob...

Embodiment 2

[0020] Embodiment 2: a kind of montan wax deresinization method with ethyl acetate as solvent, concrete steps are:

[0021] Take 1 ton of montan wax particles with a resin content of 29.1% and a particle size of less than 10mm, put the montan wax particles in a crystallization kettle, inject ethyl acetate solvent into the crystallization kettle using a solvent pump, and the feed liquid of the montan wax particles and ethyl acetate solvent The ratio is 1:30, stirring, heating, the pressure is controlled at 3.0MPa, and the heating is maintained for 20 minutes. Then cool the solution with cooling water, keep the temperature at 20°C, and crystallize by cooling for 30 minutes. Then use a circulating water vacuum pump to perform suction filtration, and dry the obtained filter residue in a product dryer at 40° C. to obtain a finished product of montan wax. The degreasing rate was measured according to GB2561-81, and it was found that the degreasing rate of montan wax was 30.28%, and...

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Abstract

The invention discloses a solvent and method for removing resin from lignite wax by virtue of a crystallization process, belonging to methods for removing resin from lignite wax. The method comprises the following steps: (1) heating and dissolving, namely putting lignite wax particles into a crystallization kettle, injecting a cyclohexane solvent or an acetic ester solvent according to a material-liquid mass ratio of 1:(5-50), stirring, heating the crystallization kettle by using steam, and controlling the pressure of the container to be 1.0-5.0 MPa until the lignite wax particles are dissolved; (2) cooling and crystallizing, namely after the lignite wax particles are dissolved, stopping heating, performing water cooling on the crystallization kettle until the temperature is between -10 and 20 DEG C, and keeping the low temperature for crystallization for 10-50 minutes; (3) filtering and drying, namely after crystallization, filtering to separate filter residues and filtrate, performing reduced pressure drying on the filter residues at 40 DEG C in a vacuum drying machine, and then performing press forming; and (4) recovering the filtrate, namely recovering by virtue of rectification, and separating the solvent and resin for recycling. The solvent adopted in the method disclosed by the invention is cyclohexane or acetic ester, and the two solvents are nontoxic, cause small harm to human bodies, are not corrosive, can be recycled, are harmless to the ecological environment and are environment-friendly.

Description

technical field [0001] The invention relates to a method for removing resin from montan wax, in particular to a solvent and method for removing resin in montan wax by crystallization. Background technique [0002] The main components of montan wax include pure wax, pitch and resin. The composition of montan wax extracted from coal in different coal-forming environments is different. Generally, pure wax components account for 60-70%, resin components account for 20-30%, and asphalt components Accounted for 5 to 20%. At present, the montan wax extraction technology in Germany is relatively mature, and the resin content of the montan wax produced by it is relatively low, generally about 15%, while the resin content in the montan wax produced in my country is as high as 25-30%, far below the industrial requirements. Too high resin content will make montan wax sticky, affect the co-solubility of montan wax and paraffin wax, reduce the physical and mechanical properties of montan...

Claims

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Application Information

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IPC IPC(8): C10G73/10C10G73/12
CPCC10G73/00
Inventor 胡光洲卞振涛李慧婷詹贵贵朱俊生
Owner CHINA UNIV OF MINING & TECH
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