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Method for extracting lignite wax from lignite

A technology for montan wax and lignite, which is applied in the chemical industry, can solve the problems of difficult recovery and utilization of mixed solvents, high quality of montan wax products, low extraction rate of extraction solvent, etc., and achieves the effects of low toxicity, low environmental hazard and high production efficiency

Active Publication Date: 2016-11-23
KINGENTA ECOLOGICAL ENG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The present invention aims at technical problems such as low extraction rate of extraction solvent, poor quality of montan wax and difficulty in recovery and utilization of mixed solvents in existing montan wax extraction technology, and provides a single extractant that is easy to recycle and a method for extracting montan wax from lignite According to the method, the extractant is non-toxic or low-toxic, has high extraction grade and is easy to recycle; the montan wax product obtained by the preparation method is of high quality

Method used

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  • Method for extracting lignite wax from lignite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) prepare lignite particles:

[0036]Put the lumpy lignite into a pulverizer to pulverize, and pass through 0.3mm and 0.1mm sieves respectively to obtain lignite particles with a particle size of 0.1 to 0.3mm, and add lignite fine powder with a particle size of less than 0.1mm to a granulator to obtain granules Diameter is the lignite particle of 0.1~0.3mm, puts the obtained lignite particle in 60 ℃ of ovens and dries, until the water content of lignite particle is calculated as 1% by mass percentage;

[0037] (2) Prepare a solution containing montan wax:

[0038] Add 100 g of the dried lignite particles in step (1) to 100 g of n-butanol, and extract with stirring for 2 hours at 90° C., with a mixer speed of 200 r / min; filter the extract with suction to obtain filtrate B and filter residue A, and then Wash the filter residue with 100 g of n-butanol at 90° C., combine the filtrate B and the washing liquid C to obtain a solution D containing montan wax;

[0039] (3) o...

Embodiment 2

[0043] (1) prepare lignite particles:

[0044] Put the lumpy lignite into a pulverizer to pulverize, pass through 0.9mm and 0.3mm sieves respectively to obtain lignite particles with a particle size of 0.3-0.9mm, and add lignite fine powder with a particle size of less than 0.3mm to a granulator to obtain granules Diameter is the brown coal particle of 0.3~0.9mm, puts the obtained brown coal particle in 70 ℃ of ovens and dries, until the water content of brown coal particle is calculated as 3% by mass percentage;

[0045] (2) Prepare a solution containing montan wax:

[0046] Add 150 g of the dried lignite particles in step (1) to 450 g of n-amyl alcohol, and extract with stirring for 3 hours at 95° C., with a mixer speed of 200 r / min; filter the extract with suction to obtain filtrate B and filter residue A, and then Wash the filter residue with 200 g of n-amyl alcohol at 95° C., combine the filtrate B and the washing liquid C to obtain a solution D containing montan wax;

...

Embodiment 3

[0051] (1) prepare lignite particles:

[0052] Put the lumpy lignite into a pulverizer to pulverize, pass through 0.9mm and 1.2mm sieves respectively to obtain lignite particles with a particle size of 0.9-1.2mm, and add lignite fine powder with a particle size of less than 0.9mm to a granulator to obtain granules Diameter is the lignite particle of 0.9~1.2mm, puts the obtained lignite particle in 80 ℃ of ovens and dries, until the water content of lignite particle is calculated as 5% by mass percentage;

[0053] (2) Prepare a solution containing montan wax:

[0054] Add 200 g of the dried lignite particles in step (1) to 800 g of isoamyl alcohol, and extract with stirring for 4 hours at 100° C., at a mixer speed of 300 r / min; filter the extract with suction to obtain filtrate B and filter residue A, and then Wash the filter residue A with 300 g of isoamyl alcohol at 100° C., combine the filtrate B and the washing liquid C to obtain a solution D containing montan wax;

[005...

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Abstract

The invention discloses a method for extracting lignite wax from lignite. According to the method, single solvent alcohol is adopted as an extracting agent. The method includes the following steps that 1, lignite particles are prepared; 2, a solution containing the lignite wax is prepared; 3, the lignite wax is prepared. The method is simple in process and good in repeatability, the selected extracting agent is low in toxicity, environmental hazards are small, the extracting grade is high, and the extracted lignite wax can be applied to the fields of automobiles, chemical engineering, light industries, daily chemicals and the like.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, relates to a method for preparing chemical materials, in particular to a method for extracting montan wax from lignite. Background technique [0002] Montan wax is a mixture composed of resin, wax and asphalt. Montan wax and its processed products have been widely used in the fields of automobiles and chemicals. At present, no synthetic or natural wax can replace montan wax in the national economy. role in. [0003] Most of the technologies for extracting montan wax now use benzene as the extraction agent. However, benzene is highly toxic and easily volatilizes at high temperatures, which is likely to cause great harm to the body of production personnel and the surrounding environment. At the same time, benzene is easy to extract the asphalt and resin in the montan wax, but has a poor extraction ability for the wax in the montan wax, which leads to a low content of crude wax in the ext...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G73/00
CPCC10G73/00
Inventor 徐政高建仁邵光伟邢士玉张艳玲
Owner KINGENTA ECOLOGICAL ENG GRP
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