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Method for producing high purity montan wax

A production method and technology of montan wax, which is applied in the field of high-purity, non-polluting montan wax production, can solve the problems of montan wax extraction and production restrictions, reduce the quality of montan wax products, and the content of impurities exceeds the standard, so as to improve product quality and benefit The effect of environmental protection and high product quality

Inactive Publication Date: 2010-12-08
李定忠 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing montan wax is extracted from lignite with organic solvent benzene or toluene, and benzene is highly toxic and will cause serious pollution to the environment. In today's society that must pay attention to environmental protection, the use of toxic solvent - benzene is restricted, which means that the extraction and production of montan wax is also restricted
Not only that, the montan wax extracted with benzene, although the national standard of impurity content such as resin and bitumen is: resin 27%, bitumen <12%, if the control is not strict, the impurity content will often exceed the standard and reduce the montan wax. product quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A, crushing the lignite to a particle size of 0.1 to 0.5 cm, sieving to remove fine powder, and drying until the moisture content is 20% by mass;

[0031] B. Put 100kg of lignite dried in step A into an extraction tank with a volume of 300L, add 150kg of industrial-grade commercially available isopropanol to cover the lignite, extract for 4 hours at an extraction temperature of 80°C, and release the extraction liquid to separate it from the lignite; add 130kg of isopropanol to the extraction tank to cover the lignite, extract for 1 hour at an extraction temperature of 80°C, release the extract and separate it from the lignite;

[0032] C, after combining the two extracts of the B step, send it into a conventional evaporator, and recover the solvent by conventional evaporation to obtain a thick concentrated solution;

[0033] D, send the crude concentrated solution of C step into a conventional vacuum evaporator, carry out vacuum evaporation recovery solvent according to...

Embodiment 2

[0038] A, crushing the lignite to a particle size of 0.1 to 0.5 cm, sieving to remove fine powder, and drying until the moisture content is 35% by mass;

[0039] B, the lignite 10kg that step A is dried is sent in the small-sized extracting tank, by isopropanol 50%, the mass ratio of ethanol 50%, prepare industrial grade commercially available isopropanol and industrial grade commercially available ethanol mixed solvent, and add 18kg Said mixed solvent is submerged in lignite, extracting for 2 hours at an extraction temperature of 70° C., releasing the extract to separate it from lignite; then adding 16 kg of said mixed solvent to the extraction tank, submerged in lignite, Under the condition that the extraction temperature is 70°C, extract for 2 hours, release the extract and separate it from the lignite, and repeat the extraction three times;

[0040] C, after combining the three extracts of the B step, send it into a conventional evaporator, and recover the solvent by conve...

Embodiment 3

[0046] A, crushing the lignite to a particle size of 0.1 to 0.5 cm, sieving to remove fine powder, and drying until the moisture content is 15% by mass;

[0047] B, the lignite 10kg that step A is dried is sent in the small-sized extracting tank, by isopropanol 20%, the mass ratio of hexanaphthene 80%, prepare industrial grade isopropanol and industrial grade hexanaphthene mixed solvent, and add 17kg Described mixed solvent, to be submerged in lignite, extract for 2 hours under normal temperature conditions at the extraction temperature, release the extract to separate it from lignite; then add 15kg of the mixed solvent in the extraction tank to cover lignite, Under the condition of extraction temperature of 85°C, extract for 2 hours, release the extract and separate it from the lignite, and repeat the extraction three times;

[0048] C, after combining the four extracts of the B step, send it into a conventional evaporator, and recover the solvent by conventional evaporation ...

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Abstract

The invention provides a method for producing high purity montan wax, including solvent extraction; wherein no solvent for submerging montan is added in the extraction process, the solvent is composed of the following components by mass ratio: 20-100% of isopropanol and 0-80% of alcohol or hydrocarbon or water, the alcohol is one or more than one of methyl alcohol, ethyl alcohol and tertiary butanol, and the hydrocarbon is one or more than one of petroleum ether, solvent No. 6, normal hexane and cyclohexane. The invention thoroughly solves the problems that the existing extraction solvent benzene has high toxicity, pollutes the environment and is harmful to human body health. Besides, non-toxic isopropanol or isopropanol mixed solvent with extremely low toxicity is used for extracting montan wax in montan, impurity content in montan wax is effectively reduced, resin content is lower than 16%, asphaltos is lower than 6%, high purity product is obtained, product quality of montan wax isgreatly improved, and the difficult problem of the current montan wax extraction technology is solved, thus providing a beneficial approach for producing high quality montan wax in scale.

Description

technical field [0001] The invention relates to a production method of montan wax, in particular to a production method of high-purity and pollution-free montan wax, which belongs to the technical field of plant extraction. Background technique [0002] The montan wax in lignite is a natural hard wax with a high melting point, which is similar to natural vegetable wax. In the composition of montan wax, in addition to the main component - wax, it also contains impurities such as resin and asphalt. Existing montan wax is extracted from lignite with organic solvent benzene or toluene, and benzene is highly toxic and will cause serious pollution to the environment. Today's society that must pay attention to environmental protection restricts the use of toxic solvent - benzene, which means that the extraction and production of montan wax is also restricted. Not only that, the montan wax extracted with benzene, although the national standard of impurity content such as resin and...

Claims

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Application Information

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IPC IPC(8): C10G73/00
Inventor 李定忠沈忱刘奕辰
Owner 李定忠
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