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Dimer fatty acid and preparation method thereof

A dimerized fatty acid and preparation process technology, applied in drying oil polymerization, petroleum industry, additives and other directions, can solve the problems of waste of raw materials, large amount of catalyst added, high cost of separation and purification, and achieve high yield, mild reaction conditions, The effect of improving the utilization rate of raw materials

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 methods, the synthesis of dimer acid requires the addition of catalysts or catalytic assistants, wherein the amount of catalyst added is large, and the catalyst used is powdery, the subsequent separation and purification costs are high, the product is lost during the separation process, and it will cause certain damage. environmental pollution
In addition, monoacids that have not participated in the reaction cannot be effectively utilized, resulting in waste of raw materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Commercial tungoleic acid (purchased from Anhui Ruifengde Oil Deep Processing Co., Ltd., model: T160) was used.

[0030] (1) Take 100g of the above-mentioned commercial oleic acid in a 250mL four-necked flask, add 0.5g of tert-butylhydroquinone at the same time, stir while purging with nitrogen, stirring at 300rpm, purging with nitrogen for 30min, and heat up to 220°C for 4h , stop heating, and cool to room temperature in ice water to obtain dimer fatty acid product A. As determined by GPC, dimer acid C 34 h 58 (COOH) 2 The content is 58.76%, and the trimer acid content is 16.67%.

[0031] (2) Carry out vacuum distillation on the dimerized fatty acid product A of step (1), the distillation temperature is 170°C, the pressure is 2Pa, the condenser temperature is 50°C, and the light components are collected. Using the collected light components as raw materials, add 10% activated clay, 0.5% lithium carbonate, and 0.5% water at the same time, stir while purging with nit...

Embodiment 2

[0033] Commercial tungoleic acid (purchased from Anhui Ruifende Oil Deep Processing Co., Ltd., model: T155) was used.

[0034] (1) Take 100 grams of the above-mentioned commercial oleic acid in a 250 mL four-neck flask, add 0.5 g of tert-butylhydroquinone at the same time, stir while purging with nitrogen, stirring at 300 rpm, purging with nitrogen for 30 minutes, and heat up to 220 ° C for reaction After 4 hours, the heating was stopped, and the mixture was cooled to room temperature with ice water to obtain dimerized fatty acid product A. As determined by GPC, dimer acid C 34 h 58 (COOH) 2 The content is 60.21%, and the trimer acid content is 13.24%.

[0035] (2) Carry out vacuum distillation on the dimerized fatty acid product A in step (1), the distillation temperature is 160°C, the pressure is 2Pa, the condenser temperature is 50°C, and the light components are fully collected; the collected light components are used as raw materials , while adding 10% activated clay,...

Embodiment 3

[0037] (1) Take 100g of the same commercial oleic acid as in Example 1 and place it in a 250mL four-neck flask, add 2g of tert-butylhydroquinone at the same time, stir while purging with nitrogen, stirring at 400rpm, purging with nitrogen for 20min, and raising the temperature to React at 230°C for 3 hours, stop heating, and cool to room temperature with ice water to obtain dimer fatty acid product A. As determined by GPC, dimer acid C 34 h 58 (COOH) 2 The content is 58.02%, and the trimer acid content is 16.92%.

[0038] (2) Carry out vacuum distillation on the dimerized fatty acid product A of step (1), the distillation temperature is 180°C, the pressure is 1.5Pa, the condenser temperature is 50°C, and the light components are collected. Using the collected light components as raw materials, add 12% activated clay, 0.3% lithium carbonate, and 0.8% water at the same time, stir while purging with nitrogen, the stirring rate is 700rpm, and purging with nitrogen for 30min. T...

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Abstract

The invention relates to dimer fatty acid and a preparation method thereof. The preparation method comprises the following steps: with eleostearic acid as a raw material, conducting stirring and purging with nitrogen in the presence of a polymerization inhibitor, conducting heating to 180-230 DEG C for reaction, so as to obtain a dimer fatty acid product A after the reaction is finished; and distilling the dimer fatty acid product A, taking the obtained light component as a raw material, and in the presence of a catalyst, preparing a dimer fatty acid product B. The dimer fatty acid provided bythe invention is prepared by adopting the method disclosed by the invention. In the method, the dimer fatty acid product A is prepared from eleostearic acid as a raw material, then the light component is obtained through distilling, and then the dimer fatty acid product B is prepared from the light component as a raw material, so that the utilization rate of the raw material and the total yield of the dimer fatty acid are improved.

Description

technical field [0001] The invention belongs to the field of dimer fatty acid preparation, and in particular relates to a dimer fatty acid and a preparation method thereof. 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. 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. ...

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