Method for extracting wax in lignite

A technology of montan wax and brown coal, which is applied in the field of extracting montan wax and extracting wax from lignite, which can solve the problems of environmental human hazards and high toxicity of benzene, and achieve the effects of convenient operation, low cost and high yield

Inactive Publication Date: 2009-08-05
李定忠
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the high toxicity of benzene, it will c...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A, the lignite is dried to a moisture content of 14%, crushed and sieved to obtain coal particles with a particle size of 0.2 to 2 mm;

[0020] B, press lignite: the mass / volume ratio of toluene=1: 3, the 500g lignite particle that step A gained is placed in the 3000ml round-bottomed flask, then add the commercially available toluene of 1500ml industrial pure to make extraction solvent, after stirring, in 30 Under the temperature of ℃, carry out the extraction for 5h, then filter to obtain the filtrate and filter residue;

[0021] C, press lignite: mass / volume ratio of toluene=1: 1, wash the lignite slag of above-mentioned B step 1 time with 20 ℃ of 500ml industrially pure commercially available toluene, fully stir in the washing process, to reclaim the lignite of extraction as far as possible Wax, filtered washing liquid and filter residue, discarded residue;

[0022] D, merge the filtrate of B step and the washing liquid of C step, and heat and evaporate toluene solv...

Embodiment 2

[0025] A, the lignite is dried to a moisture content of 50%, crushed and sieved to obtain coal particles with a particle size of 0.2 to 2 mm;

[0026] B, press lignite: the mass / volume ratio of toluene=1: 2, the 500g lignite particle of step A gained is placed in the 3000ml round-bottomed flask, then add the commercially available toluene of 1000ml industrial pure to make extraction solvent, after stirring, in 60 The extraction was carried out for 3 hours at a temperature of ℃, and the filtrate and filter residue were obtained by filtration;

[0027] C, press lignite: mass / volume ratio of toluene=1: 2, wash the lignite slag of above-mentioned B step altogether with 1000ml commercially available toluene of 60 ℃, wash with 500ml toluene at every turn, wherein fully stir, To recover the extracted montan wax as much as possible, filter the washing liquid and filter residue, and discard the residue;

[0028] D, merge the filtrate of B step and the washing liquid of C step, and hea...

Embodiment 3

[0031] A, the lignite is dried to a moisture content of 30%, crushed and sieved to obtain coal particles with a particle size of 0.2 to 2 mm;

[0032] B, press lignite: mass / volume ratio of toluene=1: 4, the 500g lignite particle that step A gained is placed in the 3000ml round-bottomed flask, then add the commercially available toluene of 2000ml industrial pure to make extraction solvent, after stirring, in 100 0.5h of extraction at a temperature of °C, and the filtrate and filter residue were obtained by filtration;

[0033] C, press lignite: mass / volume ratio of toluene=1: 1, wash the lignite slag of above-mentioned B step altogether 1 time with boiling 500ml industrially pure commercially available toluene, fully stir in the washing process, to reclaim as much as possible the extracted Montan wax, filtered to obtain washing liquid and filter residue, discarded residue;

[0034] D, merge the filtrate of B step and the washing liquid of C step, and heat and evaporate toluen...

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Abstract

The invention provides a method for extracting wax in wood coal, which is characterized by comprising the following steps: adopting methylbenzene as extraction solvent, and extracting the wood coal for 30min-5h under the temperature condition of 10-100 DEG C according to the mass/volume ratio 1:2-4 of the wood coal to the methylbenzene. The wax has no harm to the environment and the human body, and the extracted wood coal wax has the quality, the mass, and the like similar to those of the wood coal wax extracted by benzene; in addition, the extraction method has simple process, convenient operation, non-toxicity, safety, high yield, and low cost, and is suitable for the mass production.

Description

technical field [0001] The invention relates to a method for extracting montan wax, in particular to a method for extracting wax from lignite, and belongs to the technical field of plant extraction. Background technique [0002] The wax in lignite is a kind of high melting point wax similar to natural vegetable wax, and its composition includes wax, resin and asphalt. The traditional process methods all use benzene as a solvent to extract wax from lignite. Due to the high toxicity of benzene, it will cause great harm to the environment and human beings. Therefore, new extraction solvents that can replace benzene are being sought at home and abroad in recent years. On the other hand, none of the montan waxes extracted by non-benzene solvents can reach the standard of montan wax extracted by benzene solvents. Therefore, it is the current montan wax extraction technology to choose an extraction solvent that has low toxicity and can make the extracted montan wax meet the above...

Claims

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Application Information

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IPC IPC(8): C10G73/12
Inventor 李定忠
Owner 李定忠
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