Brown-coal green extractive solvent and its production

A technology of extraction solvent and production process, which is applied in the field of montan wax green extraction solvent and production process, can solve the problems of operators' physical and surrounding environment hazards, unsatisfactory selectivity of benzene to wax, and limited use fields, etc., to achieve beneficial Effect of operating environment and surrounding environment, low toxicity, and high reuse rate

Inactive Publication Date: 2007-09-05
CHINA UNIV OF MINING & TECH
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Problems solved by technology

[0003] (1) Benzene is a flammable, explosive, poisonous and harmful substance, and the extraction process is operated at a relatively high temperature close to its boiling point, with a large amount of volatilization, which is very harmful to the body of the operator and the surrounding

Method used

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  • Brown-coal green extractive solvent and its production
  • Brown-coal green extractive solvent and its production

Examples

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Embodiment 2

[0029] Embodiment 2. Mixed solvent formula: the mass percentage of cyclobutane and tert-butanol (methanol or ethanol) is 80%: 20%. Its production process is basically the same as that of Example 1, the difference is that it adopts tank group extraction, three tanks are used as a group, and the solvent is operated in countercurrent. Concrete process is: the lignite that fresh cyclohexane and tert-butanol (methanol or ethanol) mixed solvent is sent into in the extraction tank that has been extracted twice, with the same condition as embodiment one, extract after 1 hour Then the lignite is sent to the extraction tank which has been extracted once, and then the unextracted lignite is extracted. After the lignite is extracted three times, it is unloaded and replaced with new coal, which is carried out in sequence.

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Abstract

A lignite wax green extractive solvent and its production are disclosed. The process is carried out by taking mixed solvent of cyclohexane and alcohol, crushing for lignite, screening, putting lignite coal grain into extractor, mixing with solvent in proportion of 1:1-1:4 while extracting, flash evaporating, recovering solvent, evaporating for residual mixed solvent by stewing system to obtain crude lignite wax, condensing for mixed solvent steam by heat exchanger, oil-water separating, delivering cyclohexane to solvent trough, separating tert-butyl from water while rectifying, inducing tert-butyl into solvent trough, inspecting cyclohexane or tert-butyl content, supplement cyclohexane and alcohol, mixing proportionally and using. It's cheap, simple reliable, and economical, it has more wax yield and no environmental pollution.

Description

technical field [0001] The invention relates to an extraction solvent and a production process, in particular to a montan wax green extraction solvent and a production process. Background technique [0002] Montan wax generally refers to a mixture of complex compounds obtained by extracting lignite with organic solvents. Montan wax and its processed products cannot be replaced by any natural wax or synthetic wax at present, and are an indispensable and important chemical product in the current national economy. For the solvent used for montan wax extraction, toluene was used internationally in the 1980s, but it is unknown which solvent is currently used due to technical secrecy. Domestic montan wax enterprises (mainly Inner Mongolia Wudan Wax Factory and Yunnan Xundian Wax Factory) have been using the traditional organic solvent benzene, which has the following problems: [0003] (1) Benzene is a flammable, explosive, poisonous and harmful subst...

Claims

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Application Information

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IPC IPC(8): C10G73/12
Inventor 胡光洲张双全
Owner CHINA UNIV OF MINING & TECH
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