Method for producing pale disproportionated rosin with high content dehydroabietic acid and P-camphogen simultinuously

A technology for dehydroabietic acid and p-cymene, which is applied in the field of deep processing of rosin, can solve the problems of low concentration of dehydroabietic acid, large investment, long process, etc., achieves inhibition of browning and oxidation, and reduces equipment investment and energy consumption, the effect of shortening the production process

Inactive Publication Date: 2005-05-18
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] In order to solve the technical problems of complex traditional process, long flow process, large investment and high energy consumption, the inventors have found a light-colored disproportionated rosin that uses rinsed rosin as raw material to produce high-content dehydroabietic acid at the same time through many experiments and explorations. And the method of p-cymene solves the problem of low concentration and dark color of dehydroabietic acid contained in the traditional production of disproportionated rosin, and improves the extraction rate of isolated dehydroabietic acid from the source of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The purchased fresh turpentine is crushed and sent to the turpentine tank, and then rinsed and maintained by adding sterilized and low dissolved oxygen water. The water quality should be 20-30cm higher than the resin surface, and the tap water should be changed every 5-30 days. After three consecutive changes The rosin that has been rinsed is sent to the dissolving tank and added with turpentine to adjust to contain 60-80% by weight of rosin, and the purified rosin liquid is obtained after heating, dissolving, filtering and clarifying processes, and then added to the disproportionation reactor after metering from the head tank. And add the Pd / C catalyst by 0.10~0.20% of the weight of the feed, after vacuumizing and replacing the air in the autoclave with nitrogen, adjust the protective gas nitrogen pressure in the autoclave to be 0.01~0.5MPa, start the agitator and the agitator of the disproportionation reactor Heating the system, raising the temperature to 260-280°C, ma...

Embodiment 2

[0031] Send the rinsed turpentine to the dissolving tank and add turpentine to adjust to 50-60% by weight of rosin. The reaction time is 0.8-1.8 hours, and the rest are the same as in Example 1.

Embodiment 3

[0033] Send the rinsed turpentine to the dissolving kettle and add turpentine to adjust to 20-50% by weight of rosin. The reaction time is 0.5-1.5 hours, and the rest are the same as in Example 1.

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PUM

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Abstract

The process of producing pale disproportionated rosin with high dehydroabietic acid content and paracymene simultaneously includes the following steps: rinsing turpentine to eliminate impurity, dissolving turpentine in turpentine oil to form turpentine solution, catalytic disproportionating turpentine in solution in the presence of Pd / C catalyst, filtering and decompression distillation to obtain pale disproportionated rosin with high dehydroabietic acid content and disproportionated turpentine oil containing paracymene in 20-60 %, and distilling disproportionated turpentine oil to obtain paracymene and pinane. Or, the rinsed turpentine as material may be re-crystallized to purify and catalytically disproportionated to prepare pale disproportionated rosin containing high dehydroabietic acid in 72-82 %. The Pd / C catalyst may be replaced with skeletal nickel catalyst.

Description

technical field [0001] The invention relates to a method for deep processing of rosin, in particular to a method for simultaneous production of light-colored disproportionated rosin with high content of dehydroabietic acid and p-cymene technical background [0002] Disproportionated rosin is an important deep-processing product of rosin. Its main use is as emulsifier for synthetic rubber polymerization, and it can also be used in the manufacture of water-soluble pressure-sensitive adhesives. The main chemical component of disproportionated rosin is dehydroabietic acid (also known as dehydroabietic acid), which accounts for about 40-60% of the weight of disproportionated rosin. The dehydroabietic acid obtained by isolation can be used in the synthesis of drugs, antibacterial agents, antifungal agents, bactericidal pesticides and various surfactants. p-Cymene (also known as p-cymene) is a deep-processed product of turpentine and an important organic chemical raw material. P-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09F1/02
Inventor 陈小鹏王琳琳祝远姣韦小杰刘雁
Owner GUANGXI UNIV
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