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A kind of method taking tung oil as raw material synthetic dimer acid

A technology of dimer acid and tung oil, applied in chemical instruments and methods, preparation of organic compounds, preparation of carboxylate, etc., can solve the problems of a large amount of waste water environment, long process cycle, loss of samples, etc., and achieve low investment cost and high product quality Good quality and the effect of increasing the yield

Active Publication Date: 2022-06-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the current synthesis reaction needs to go through two steps, and there are disadvantages such as long process cycle, difficult operation, sample loss during the intermediate separation process, and side reactions and cross-linking are prone to occur during the hydrolysis process, and a large amount of waste water will be generated to cause environmental pollution and other problems.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Take 50mL of commercial tung oil (purchased from Fujian Golden Forest Industry Co., Ltd.), the saponification value is 190mg / g KOH, the acid value is 150mg / g KOH, and the iodine value is 150g / 100g, put it in a reaction kettle, add 150mL water and 0.47g ten Dialkyltrimethylammonium bromide, nitrogen purge was carried out while stirring, the stirring speed was 300rpm, nitrogen purged for 30min, filled with high-purity nitrogen with a pressure of 4.0MPa, sealed and heated to 210°C for 4h reaction, stop heating, ice water Cool to room temperature, stand for liquid separation, and the upper layer is the dimer acid product. By GPC determination, the content of dimer acid in the product was 59.71%, and the content of trimer acid was 14.56%. In the glycerol product obtained by lower distillation, the glycerol content is 93.21%.

Embodiment 2

[0029] Take 50 mL of the same commercial tung oil as in Example 1 and place it in the reactor, add 200 mL of water and 1.41 g of dodecyl trimethyl ammonium bromide, and carry out nitrogen purging while stirring, with a stirring speed of 400 rpm, nitrogen purging for 20 min, and charging Put high-purity nitrogen under 3.0MPa pressure, seal and heat up to 200℃ for 5h, stop heating, cool to room temperature in ice water, stand for liquid separation, the upper layer is dimer acid product. By GPC determination, the content of dimer acid in the product was 58.07%, and the content of trimer acid was 17.2%. In the glycerol product obtained by lower distillation, the glycerol content is 92.4% after testing.

Embodiment 3

[0031] Get 50mL of the same commercial tung oil as in Example 1 and place it in the reactor, add 50mL of water and 0.235g of dodecyl trimethyl ammonium bromide, stir while carrying out nitrogen purge, stirring speed 400rpm, nitrogen purge 30min, charge Put high-purity nitrogen gas under 4.0MPa pressure, heat up to 180℃ for 6h, stop heating, cool to room temperature in ice water, stand for liquid separation, the upper layer is dimer acid product. By GPC determination, the content of dimer acid in the product was 49.96%, and the content of trimer acid was 13.6%. In the glycerol product obtained by lower layer distillation, the glycerol content is 90.06% after testing.

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PUM

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Abstract

The invention relates to a method for synthesizing dimer acid by using tung oil as a raw material. In the presence of a catalyst and water, stirring with nitrogen purging at the same time, raising the temperature to 170-220°C for reaction, and obtaining dimer acid after the reaction is completed product and glycerol. The dimer acid product of the present invention is synthesized by the above-mentioned method of the present invention. The invention can synthesize dimer acid from oil in one step, and simultaneously produce glycerin by-product, and has the advantages of simple process, no waste water generation, less substrate loss and the like.

Description

technical field [0001] The invention belongs to the field of dimer acid synthesis, in particular to a method for synthesizing dimer acid by using tung oil as a raw material. Background technique [0002] Dimer acid is named because it contains two carboxylic acid groups in its molecule, mainly referring to C18 unsaturated fatty acid under certain conditions, according to Diels-Alder reaction to generate dimer acid with C36 as the main component. According to the reaction mechanism, the basic structures of dimer acids are roughly divided into three categories: monocyclic, bicyclic and acyclic. Commercial dimer acid is a mixture of isomers. [0003] The dimer acid has a moderate molecular weight and a unique structure. The molecule has both a long flexible carbon chain and a relatively rigid cyclic structure. It not only has both polar and non-polar groups, but also has carbonyl and double bonds. reactive groups. These unique molecular structures give them unique physical a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C51/353C07C57/26C07C29/09C07C31/22C08G69/04
CPCY02P20/584
Inventor 王宜迪李澜鹏曹长海程瑾李秀峥王领民乔凯
Owner CHINA PETROLEUM & CHEM CORP