Method for extracting montan wax from lignite

A montan wax and lignite technology, applied in the field of low-rank coal utilization, can solve the problems of organic solvent pollution, waste liquid pollution, etc., and achieve the effects of low acidity, reduced environmental pollution, and small environmental hazards

Active Publication Date: 2020-02-18
INNER MONGOLIA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the process of realizing the technical solutions of the invention in the specific embodiments of the application, the inventors of the present application found that the above-mentioned technologies have the following technical problems: they all need to use organic solvents such as benzene, and the use of a large amount of organic solvents seriously pollutes the environment and simultaneously causes waste liquid Pollution problem is serious

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1. Fermentation treatment of lignite:

[0026] (1) Fermentation of lignite: the remaining sludge is diluted, filtered, precipitated, dehydrated, and then 0.5Kg of lignite with a mesh number of 100 is taken, which is equally divided into two parts and put into two fermentation bottles respectively. Add an appropriate amount of activated residual sludge into the fermentation bottle, stir evenly, and adjust the pH in the fermentation bottle to about 7.5. The fermentation bottle is placed in an environment of about 25°C for fermentation, and the fermentation lasts for 30 days. Since the bacteria in the activated residual sludge at the beginning of the fermentation may not be able to utilize the organic matter in the lignite, 3 g of glucose should be added to the fermentation bottle every day for the first 5 days of fermentation to provide the bacteria in the fermentation bottle with the energy necessary for growth and reproduction; among them, The solid-to-liquid ratio of ...

Embodiment 2

[0045] On the basis of Example 1, in this example, in: 1. In the fermentation of lignite (1) in the fermentation process of lignite, the solid-to-liquid ratio of excess sludge and glucose water is 1:1g / mL, and the The solid-to-liquid ratio is 1:3g / mL; in: three, in the mixed solvent extraction montan wax of dehydrated alcohol and benzene, dehydrated alcohol is used 80mL, and benzene is used 320mL; Other steps are completely consistent with embodiment 1.

Embodiment 3

[0047] On the basis of embodiment 1, in the present embodiment, in: (1) in the fermentation of lignite in the fermentation treatment of lignite, the solid-to-liquid ratio of residual sludge and glucose water is 1:6g / mL, and in glucose water The solid-to-liquid ratio is 1:10g / mL; in: three, in the mixed solvent extraction montan wax of dehydrated alcohol and benzene, dehydrated alcohol is used 66.7mL, and benzene is used 333.3mL; Other steps are completely consistent with embodiment 1.

[0048] Measure the extraction rate of montan wax in steps 2, 3, 4 and 5 in Example 1, and measure indexes such as montan wax acidity value and saponification value according to "GBT2559-2005 Montan Wax Determination Method".

[0049] The extraction rate of montan wax extracted by benzene + absolute ethanol (1:1) before lignite fermentation was 0.9818%, and the extraction rate of montan wax extracted by benzene + absolute ethanol (1:1) after fermentation was 1.5289%, and the extraction rate incre...

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Abstract

The application provides a method for extracting montan wax from lignite, which belongs to the technical field of lignite utilization. The method is as follows: screening lignite, crushing, putting it into a fermentation device, adding excess sludge and sugar solution to the fermentation device, and stirring evenly , adjust the pH, seal the fermentation, take out the lignite after the fermentation is completed, dry and pulverize it, add it to the mixed solution of alcohol solution and benzene for extraction, then centrifuge the obtained extract, and evaporate the centrifuged extract to obtain the residual After drying, montan wax can be prepared. The present invention extracts montan wax through a two-step reaction method coupled with microbial leaching and chemical leaching, the yield and quality of montan wax are greatly improved, and the pollution to the environment caused by the chemical method of simply using organic solvent extraction is reduced. A new way to prepare montan wax from abundant lignite is of great significance to the high-value utilization of lignite resources.

Description

technical field [0001] The invention belongs to the technical field of low-rank coal utilization, and in particular relates to a method for extracting montan wax from lignite. Background technique [0002] Low-rank coal (including lignite, long-flame coal, weakly caking coal and non-caking coal) accounts for more than 50% of my country's coal reserves and production. How to cleanly utilize low-rank coal resources and maximize benefits is an important issue for China's coal chemical industry. [0003] Lignite, also known as firewood coal, has the characteristics of high moisture content, low calorific value, good chemical reactivity, and is flammable and fragile, so it is not suitable for long-distance transportation. There are many problems in the main ways of lignite utilization, such as coal gasification, pyrolysis polygeneration, upgrading and clean power generation. Lignite is used as coal and burned directly, only using the organic matter of lignite, ignoring the humic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G73/00
CPCC10G73/00
Inventor 马力通王亚雄刘云颖
Owner INNER MONGOLIA UNIV OF SCI & TECH
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