Method for extracting lignite wax from lignite

A technology for montan wax and lignite, which is applied in the field of low-rank coal utilization, can solve the problems of organic solvent pollution, waste liquid pollution, etc., and achieves the effects of solving low acidity value, reducing environmental pollution, and green extraction process.

Active Publication Date: 2018-08-10
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 may not be able to utilize the organic matter in the lignite at the beginning of the fermentation, 3g 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 e...

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 invention discloses a method for extracting lignite wax from lignite and belongs to the technical field of lignite utilization. The method comprises the following steps: screening lignite, crushing, putting into a fermentation device, putting residual sludge and a sugar solution into the fermentation device, uniformly stirring, adjusting the pH value, performing sealed fermentation, after fermentation is completed, taking out the lignite, drying, crushing, extracting in a mixed solution of an alcohol solution and benzene, centrifuging the obtained extract, evaluating the centrifuged extract so as to obtain a residue, and drying the residue, so as to obtain the lignite wax. By adopting the method, the lignite wax is extracted by using a two-step reaction method of microorganism extraction and chemical extraction, the yield of the lignite wax can be greatly increased, the quality of the lignite wax can be greatly improved, the environment pollution caused by a mere chemical method that extraction is carried out with an organic solvent is reduced, a novel way for preparing the lignite wax from lignite which is rich in reserve volume is developed, and the method has great significances on 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 Applications(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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