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Preparing method for phenol series substances

A series and material technology, applied in the field of preparation of phenolic series substances, can solve the problems of difficult to obtain valuable utilization of lignin, conversion rate, catalytic technology, and economical efficiency, etc., to reduce investment The cost effect of recycling and recycling

Inactive Publication Date: 2005-02-23
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many methods for producing phenolic substances from lignin, and there are also relatively mature technologies for industrial operation. Has not been well resolved, making lignin difficult to obtain valuable utilization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Nitrogen: sulfur: oxygen: a mixture of hydrogen elements, the weight mixing ratio = 0.6: 2.1: 1.8: 0.35, then add activated carbon accounting for 60% of the weight of the mixture, and stir at 110 ° C for 3 to 4 hours to make a catalyst ,spare. After the pulping waste liquor from the chemical treatment process is separated from the pulp fibers, a lignin-containing waste liquor with a concentration of 10% is obtained. The waste liquid is concentrated and spray-dried to prepare crude lignin dry powder with a water content of less than 15% and an inorganic matter content of less than 4%.

Embodiment 2

[0028] In addition to the mixture of nitrogen: sulfur: oxygen: hydrogen elements, its weight mixing ratio=0.5:2.0:1.7:0.3, then add activated carbon accounting for 50% of the mixture by weight, and stir at 100 ° C for 4 hours, other processes With embodiment 1.

Embodiment 3

[0030] In addition to the mixture of nitrogen: sulfur: oxygen: hydrogen elements, the weight mixing ratio=0.7: 2.3: 1.9: 0.4, then add activated carbon accounting for 70% of the weight of the mixture, and stir at 120 ° C for 3 hours; Except that the waste liquid is dried by air flow, other processes are the same as in Example 1.

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PUM

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Abstract

A process for preparing a series of phenolic substances includes such steps as dissolving the lignin powder recovered from waste pulp liquid in solvent, adding catalyst, high-temp and-pressure hydrogenating to obtain a series of compounds, and classifying.

Description

technical field [0001] The invention relates to a preparation method for obtaining phenolic series substances from natural renewable substances. More specifically, the present invention relates to a preparation method for obtaining phenolic series substances from lignin. Background technique [0002] Phenolic substances refer to substances with one or more hydroxyl groups on the benzene ring. Due to the complex and diverse chemical linkages of the benzene ring structure, the position and number of hydroxyl groups substituted by the benzene ring phenols are also different, and the distribution of different molecular weights due to the number of benzene rings, etc., phenolic substances are actually Benzene series compounds containing phenolic hydroxyl groups. Phenolic substances are a large class of important chemical raw materials, which are widely used in chemistry, chemical industry, medicine, food, materials and other fields. [0003] Industrial...

Claims

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Application Information

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IPC IPC(8): C07C37/00C07C37/50
Inventor 陈克利
Owner KUNMING UNIV OF SCI & TECH
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