Dimer acid and synthetic method thereof

A synthesis method and dimer acid technology, applied in chemical instruments and methods, preparation of carboxylate, preparation of organic compounds, etc., can solve the problems of large amount of catalyst added, high polymerization temperature, high cost of separation and purification, and achieve product The effect of good quality, low reaction temperature and wide application range

Pending 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, the polymerization reaction temperature is relatively high, generally not lower than 240°C, and some reaction processes require pressure, which requires high equipment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Commercial tungoleic acid (purchased from Anhui Ruifengde Oil Deep Processing Co., Ltd., model: T160) was used. Take 100g of commercial oleic acid T160 in a 250mL four-neck flask, add 0.5g of tert-butylhydroquinone at the same time, purging with nitrogen for 30min, stirring at 300rpm, raising the temperature to 220°C for 4h, stopping heating, and cooling in ice water to At room temperature, the dimer acid product was obtained. As determined by GPC, the dimer acid content is 58.76%, and the trimer acid content is 16.67%.

Embodiment 2

[0028] Commercial tungoleic acid (purchased from Anhui Ruifende Oil Deep Processing Co., Ltd., model: T155) was used. Take 100 grams of commercial oleic acid T155 in a 250 mL four-necked flask, add 0.5 g of tert-butylhydroquinone at the same time, purging with nitrogen for 30 min, stirring at 300 rpm, raising the temperature to 220 ° C for 4 h, stopping heating, and cooling in ice water to room temperature to obtain dimer acid product. As determined by GPC, the dimer acid content is 60.21%, and the trimer acid content is 13.24%.

Embodiment 3

[0030] Take 100 g of the same commercial oleic acid as in Example 1 and place it in a 250 mL four-neck flask, add 2 g of tert-butylhydroquinone at the same time, purging with nitrogen for 20 min, stirring at a rate of 400 rpm, raising the temperature to 230 ° C for 3 h, stopping heating, and Cool to room temperature with ice water to obtain dimer acid product. As determined by GPC, the dimer acid content is 58.02%, and the trimer acid content is 16.92%.

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PUM

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Abstract

The invention relates to a dimer acid and a synthetic method thereof. According to the synthetic method, eleostearic acid is taken as a raw material, in the presence of a polymerization inhibitor, stirring is carried out while purging with nitrogen, heating is carried out to 180-230 DEG C for reaction, and a dimer acid product is obtained after the reaction is finished. The dimer acid is synthesized by adopting the method disclosed by the invention, the molecular formula of the dimer acid is C34H58(COOH)2, and the content of the dimer acid in the product is more than or equal to 55%. Accordingto the method, eleostearic acid is used as the raw material to synthesize the dimer acid, a catalyst is not needed, the reaction conditions are relatively mild, the process is simple, and the dimer acid yield is high.

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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Patent Type & Authority Applications(China)
IPC IPC(8): C07C51/353C07C57/26C07C29/09C07C31/22C08G69/04
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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