Dimer fatty acid and synthetic method thereof

A technology of dimer fatty acid and synthesis method, which is applied in the direction of dry oil polymerization, lubricating composition, petroleum industry, etc., can solve the problems of high cost of separation and purification, large amount of catalyst addition, high equipment requirements, etc., and achieve good product quality and improved Yield and wide range of applications

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

[0008] In the above-mentioned synthesis method, the synthesis of dimer acid all needs to add catalyst or / and catalytic assistant, and wherein catalyst addition amount is large, and used catalyst is powdery, and follow-up separation and purification cost is higher, and product is lost in the separation process, and will cause some environmental pollution
In addition, some reaction processes need to be under pressure, which requires high equipment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Commercial tungoleic acid (purchased from Anhui Ruifengde Oil Deep Processing Co., Ltd., model: T160) was used, linoleic acid was used as a dispersant, and tert-butylhydroquinone was used as a polymerization inhibitor.

[0028] Take 100g of dispersant and 0.5g of polymerization inhibitor, put them in a 250mL four-necked flask, stir while purging with nitrogen, the stirring rate is 300rpm, purging with nitrogen for 30min, raising the temperature to 260°C, according to the dilution rate of 0.5h -1 100 g of linoleic acid was fed in stream for 2 hours. After the feed was completed, the reaction was maintained for 2 hours, the heating was stopped, and the mixture was cooled to room temperature in ice water to obtain a dimer acid product. As determined by GPC, the dimer acid content was 75.62%, and the trimer acid content was 7.01%.

Embodiment 2

[0030] Commercial tungoleic acid (purchased from Anhui Ruifengde Oil Deep Processing Co., Ltd., model: T155) was used, linoleic acid was used as a dispersant, and tert-butylhydroquinone was used as a polymerization inhibitor.

[0031] Take 100g of dispersant and 0.5g of polymerization inhibitor, put them in a 250mL four-necked flask, stir while purging with nitrogen, the stirring rate is 300rpm, purging with nitrogen for 30min, raising the temperature to 2260°C, according to the dilution rate of 0.5h -1 100 g of linoleic acid was fed in stream for 2 hours. After the feed was completed, the reaction was maintained for 2 hours, the heating was stopped, and the mixture was cooled to room temperature in ice water to obtain a dimer acid product. As determined by GPC, the dimer acid content was 76.87%, and the trimer acid content was 6.15%.

Embodiment 3

[0033]Adopt the same oleic acid, dispersant and polymerization inhibitor as embodiment 1.

[0034] Take 50g of dispersant and 1g of polymerization inhibitor, put them in a 250mL four-necked flask, stir while purging with nitrogen, the stirring rate is 200rpm, purging with nitrogen for 25min, raising the temperature to 250℃, according to the dilution rate of 0.7h -1 Feed 100 g of linoleic acid for 2.86 hours. After the feed is completed, keep the reaction for 1 hour, stop heating, and cool to room temperature in ice water to obtain a dimer acid product. As determined by GPC, the dimer acid content was 75.01%, and the trimer acid content was 7.35%.

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PUM

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Abstract

The invention relates to dimer fatty acid and a synthetic method thereof. The method comprise the following steps: stirring while purging with nitrogen in the presence of a polymerization inhibitor and a linoleic acid dispersing agent, heating to 240-280 DEG C, beginning to feed-batch eleostearic acid, and maintaining a reaction for a period of time after feeding-batch to obtain a dimer fatty acidproduct. The dimer fatty acid is prepared by adopting the method disclosed by the invention, the molecular formula of the dimer fatty acid is C34H58(COOH)2, and the content of the dimer fatty acid inthe product is more than or equal to 70%. According to the method, the eleostearic acid is used as the raw material to synthesize the dimer fatty acid, a catalyst is not needed, the reaction conditions are relatively mild, the process is simple, and the dimer fatty acid yield is high.

Description

technical field [0001] The invention belongs to the field of dimer fatty acid synthesis, and in particular relates to a dimer fatty acid and a synthesis method. Background technique [0002] Dimer fatty acid (dimer acid) is named for its molecule containing 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 make ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09F7/06C08G69/34C10M129/93C09J9/00
Inventor 曹长海李澜鹏王宜迪程瑾李秀峥王领民乔凯
Owner CHINA PETROLEUM & CHEM CORP
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