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Solvent and method for extracting montan wax

A montan wax and extraction technology, applied in the recovery/refining of mineral wax, petroleum industry, etc., can solve the problems of benzene use and export restrictions, damage to human health, pollution of the environment, etc., and achieve good quality and improve product quality.

Inactive Publication Date: 2009-04-15
李定忠
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The montan wax in the prior art is mostly extracted with benzene-based solvents. Because benzene is highly toxic, it will not only pollute the environment, but even damage people's health during the extraction process. Therefore, the use and export of benzene Strictly restricted, coupled with the rising price of benzene in recent years, the production cost of montan wax remains high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A, drying the lignite to a moisture content of 12%, pulverizing to a particle size≤2mm, passing through a 60-mesh sieve, and removing the coal powder to obtain coal particles with a particle size of 0.2 to 2mm for subsequent use;

[0022] B, 500g of the above-mentioned dry brown coal with a particle size of 0.2~2mm is placed in a 3000ml round bottom flask, and 1000ml of mixed solvent is added (the mass / volume ratio of brown coal and solvent is 1 / 2), wherein 1,2-dichloroethane 900ml, 100ml of ethanol with a concentration of 95% (that is, the volume ratio of 1,2-dichloroethane to ethanol with a concentration of 95% is 9:1), reflux extraction on a water bath for 2 hours, and filter while hot to obtain a filter residue and a filtrate In addition, get 250ml of mixed solvent (i.e. 1,2-dichloroethane and concentration is 95% ethanol volume ratio is 9:1) that is preheated to 70 ℃ and the same mixed solvent as extraction) wash the filter residue after filtering once, wash liquid...

Embodiment 2

[0026] A, drying the lignite to a moisture content of 30%, pulverizing to a particle size≤2mm, passing through a 60-mesh sieve, and removing the coal dust to obtain coal particles with a particle size of 0.2 to 2mm for subsequent use;

[0027] B, the above-mentioned lignite 450g that particle size is 0.2~2mm is placed in the 3000ml round bottom flask, adds 1125ml mixed solvent (the mass / volume ratio of lignite and solvent is 1 / 2.5), wherein 1,2-ethylene dichloride 675ml, 450ml of methanol with a concentration of 95% (that is, the volume ratio of 1,2-dichloroethane to methanol with a concentration of 95% is 6:4), reflux extraction on a water bath for 0.5h, and filter while hot to obtain the filtrate and filter residue; 230ml of the same mixed solvent preheated to 70°C (i.e. the volume ratio of 1,2-dichloroethane to methanol with a concentration of 95% is 6:4) washed the filter residue once, and the washing liquid and the filtrate were combined;

[0028] C. After the extraction ...

Embodiment 3

[0031] A, drying the lignite to a moisture content of 50%, pulverizing to a particle size≤2mm, passing through a 60-mesh sieve, and removing the coal powder to obtain coal particles with a particle size of 0.2 to 2mm for subsequent use;

[0032] B, the above-mentioned lignite 520g that particle size is 0.2~2mm is placed in 3000ml round bottom flask, adds 520ml mixed solvent (mass / volume ratio of lignite and solvent is 1 / 1), wherein 1,2-ethylene dichloride 156ml 364ml of 95% tert-butanol (i.e. 1,2-dichloroethane and 95% tert-butanol volume ratio of 3:7), reflux extraction on a water bath for 5h, filtered while hot to obtain filtrate and Filter residue; get another 200ml of the same mixed solvent preheated to 70°C (i.e., the volume ratio of 1,2-dichloroethane and 95% tert-butanol is 3:7) to wash the filter residue once, and mix the washing liquid with the filtrate merge;

[0033] C. Distill the combined extraction and washing solution of step B until no solvent is evaporated, t...

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Abstract

The invention provides a solvent and a method for extracting montan wax, which is characterized in that: the solvent is prepared by 1, 2-dichloroethane and alcohol according to the volume ratio of 3:7 to 10:0; grinding, extracting, filtering, concentrating and drying are carried out to obtain the brown montan wax. Under same production conditions, the solvent and the method increase the yield of the montan wax by 2 to 3 percentage and reduce the cost of the solvent by 10 to 20 percent compared with the benzene extraction method. Moreover, with high quality, the extracted montan wax has lighter brown color. The extracting solvent used by the invention causes no pollution to the environment and does not harm the human health. Changing the solvent into the nontoxic and harmless one provided by the invention and not changing the existing production equipment or technological conditions, the solvent and the method can save energy and reduce consumption, improve the quality of the products and bring no pollution to the environment.

Description

technical field [0001] The invention relates to a solvent and a method for extracting montan wax, belonging to the technical field of mineral extraction. Background technique [0002] Montan wax is a high melting point hard wax extracted from lignite with organic solvents. It is widely used in chemical industry, light industry, automobile, daily chemical and other fields. It is a mineral that cannot be replaced by animal and plant waxes from natural sources. wax. [0003] The montan wax in the prior art is mostly extracted with benzene-based solvents. Because benzene is highly toxic, it will not only pollute the environment, but even damage people's health during the extraction process. Therefore, the use and export of benzene Strictly restricted, coupled with the rising price of benzene in recent years, the production cost of montan wax remains high. Therefore, both at home and abroad are looking for solvents to replace benzene, in order to reduce the pollution of the env...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G73/14
Inventor 李定忠
Owner 李定忠
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