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Dimer acid and synthesis method thereof

A synthesis method and technology of dimer acid, applied in chemical instruments and methods, preparation of carboxylic acid salts, preparation of organic compounds, etc., can solve the problems of low yield of dimer acid, achieve less catalyst consumption and reduce catalyst consumption , Good effect of environmental protection and economy

Active Publication Date: 2020-05-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention requires a specific composition of raw materials and the yield of dimer acid is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Cottonoleic acid (commercially available, acid value 193-200mgKOH / g, iodine value 138-145g / 100g) and oleic acid (commercially available, acid value 185-200mgKOH / g, iodine value 155-160g / 100g) were used.

[0025] Get 30g cotton oleic acid in autoclave, add 1.2g activated clay, 0.03g Li simultaneously 2 CO 3 , 0.3g of water, 4.5g of oleic acid, stirring at 400rpm, purging with nitrogen for 30min, sealing and raising the temperature to 254°C for 5h, stopping heating to obtain dimer acid product. As determined by GPC, the dimer acid content is 65.56%, and the trimer acid content is 11.52%.

Embodiment 2

[0027] Cottonoleic acid and oleic acid used are the same as in Example 1. Get 30g cotton oleic acid in autoclave, add 1.2g activated clay, 0.03g Li simultaneously 2 CO 3 , 0.3g of water, 1.5g of oleic acid, stirring at 400rpm, purging with nitrogen for 30min, sealing and raising the temperature to 254°C for 5h, stopping heating to obtain the dimer acid product. As determined by GPC, the dimer acid content is 61.32%, and the trimer acid content is 9.72%.

Embodiment 3

[0029] Cottonoleic acid and oleic acid used are the same as in Example 1. Get 30g cotton oleic acid in autoclave, add 1.2g activated clay, 0.03g Li simultaneously 2 CO 3 , 0.3g of water, 7.5g of oleic acid, stirring at 400rpm, purging with nitrogen for 30min, sealing and raising the temperature to 254°C for 5h, stopping heating to obtain dimer acid product. As determined by GPC, the dimer acid content is 63.27%, and the trimer acid content is 10.01%.

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Abstract

The invention relates to a dimer acid and a synthetic method thereof. The dimer acid is obtained by taking cotton oil acid as a raw material, taking activated clay as a catalyst, adding Li2CO3 and water, adding a certain amount of eleostearic acid, stirring, purging with nitrogen, heating to a certain temperature, carrying out sealed reaction, and cooling after the reaction is finished. When the dimer acid is prepared by taking the cotton oil acid as the raw material, eleostearic acid is added, so that the use amount of the catalyst is reduced, and the yield of the dimer acid is increased.

Description

technical field [0001] The invention belongs to the field of dimer acid synthesis, and in particular relates to a dimer acid and a synthesis method thereof. 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. At present, commercial dimer acid is generally a mixture of three 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): C07C51/353C07C57/13C07C57/02C07C55/02C07C55/22
CPCC07C51/353C07C57/13C07C57/02C07C55/02C07C55/22
Inventor 曹长海李澜鹏王宜迪程瑾李秀峥彭绍忠
Owner CHINA PETROLEUM & CHEM CORP