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Method for synthesizing dimer acid by using tung oil as raw material

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 number of waste water environment, long process cycle, loss of samples, etc., and achieve low investment cost and product quality. The effect of good quality and improved yield

Active Publication Date: 2019-06-14
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 Jinlin Industry Co., Ltd.), with a saponification value of 190mg / gKOH, an acid value of 150mg / gKOH, and an iodine value of 150g / 100g, put it in a reaction kettle, add 150mL of water and 0.47g Dialkyltrimethylammonium bromide, stirring with nitrogen purging at the same time, the stirring rate is 300rpm, nitrogen purging for 30min, filled with high-purity nitrogen at a pressure of 4.0MPa, sealed and heated to 210°C for 4h, stop heating, put in ice water Cool to room temperature, let stand to separate the liquid, and the upper layer is dimer acid product. As determined by GPC, the content of dimer acid in the product is 59.71%, and that of trimer acid is 14.56%. In the glycerol product obtained by the lower layer distillation, the glycerol content is 93.21%.

Embodiment 2

[0029] Get 50mL of commercial tung oil identical to Example 1 and place it in a reactor, add 200mL of water and 1.41g of dodecyltrimethylammonium bromide, stir and carry out nitrogen purge at the same time, stirring speed 400rpm, nitrogen purge 20min, fill Inject high-purity nitrogen gas at a pressure of 3.0MPa, heat up to 200°C to react for 5 hours after sealing, stop heating, cool to room temperature in ice water, let stand for liquid separation, and the upper layer is dimer acid product. As determined by GPC, the content of dimer acid in the product is 58.07%, and that of trimer acid is 17.2%. In the glycerol product obtained by the lower layer distillation, the glycerol content is 92.4% after detection.

Embodiment 3

[0031] Get 50mL of commercial tung oil identical to Example 1 and place it in a reactor, add 50mL of water and 0.235g of dodecyltrimethylammonium bromide, stir and carry out nitrogen purge at the same time, stirring speed 400rpm, nitrogen purge 30min, fill Inject high-purity nitrogen gas at a pressure of 4.0 MPa, raise the temperature to 180°C for 6 hours, stop heating, cool to room temperature in ice water, let stand to separate the liquid, and the upper layer is the dimer acid product. As determined by GPC, the content of dimer acid in the product is 49.96%, and that of trimer acid is 13.6%. In the glycerol product obtained by the 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, comprising the following steps of: stirring tung oil as a raw material in the presence of a catalystand water and conducting nitrogen purging at the same time, conducting heating to 170-220 DEG C for reaction, so as to obtain a dimer acid product and glycerol after the reaction is finished. The dimer acid product is synthesized by the method provided by the invention. The method can synthesize the dimer acid from grease by a one-step method, can produce glycerol as a byproduct, and has the advantages of simple process, no wastewater generation, low substrate loss and the like.

Description

technical field [0001] The invention belongs to the field of dimer acid synthesis, and in particular relates to a method for synthesizing dimer acid by using tung oil as a raw material. Background technique [0002] Dimer acid is named after its molecule contains two carboxylic acid groups, mainly refers to C18 unsaturated fatty acid under certain conditions, according to the Diels-Alder reaction to generate dimer acid with C36 as the main component. According to the reaction mechanism, the basic structures of dimer acids can be 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 ring structure. It not only has polar and non-polar groups, but also has active properties such as carbonyl and double bonds. reactive groups. These unique molecular structures...

Claims

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Application Information

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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