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Method for preparing acetyl trioctyl citrate

A technology of acetyl trioctyl citrate and citric acid, which is applied in the field of preparation of acetyl trioctyl citrate, can solve the problems of high reaction temperature, high catalyst cost, complex synthesis process, etc., and achieve mild reaction conditions and short reaction time , the effect of high yield

Inactive Publication Date: 2019-10-08
江苏开来医药科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The catalysts in the existing technology of synthesizing trioctyl citrate all have various problems, such as complex synthesis process, high reaction temperature, highly restrictive reaction conditions, high catalyst cost, and low product quality controllability. , not suitable for industrial production

Method used

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Embodiment Construction

[0010] The present invention will be further elaborated below by specific embodiment:

[0011] The preparation method of acetyl trioctyl citrate comprises the following processes, and the raw materials are measured in proportion. The raw materials are trioctyl citrate, acetic anhydride, and the proportioning ratio of trioctyl citrate and acetic anhydride quality is 1: 1.5; The still heats up, and adds catalyzer, and catalyzer is the quality 1.5% of trioctyl citrate. For the reaction, the temperature was controlled at 90°C; the reaction time was 4.75h. After the reaction time, start to reduce pressure, deacidify to recover acetic acid, neutralize and wash with water after deacidification, and finally decolorize with activated carbon, dry and filter to obtain acetyl trioctyl citrate.

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Abstract

The invention relates to the technical field of plasticizer synthesis and in particular discloses a method for preparing acetyl trioctyl citrate. The method for preparing the acetyl trioctyl citrate comprises the following steps: measuring raw materials according to a ratio, wherein the raw materials are trioctyl citrate and acetic anhydride; and putting the raw materials into an acylation kettle,increasing the temperature, adding a catalyst, performing a reaction, starting to reduce the pressure after a certain time of the reaction, performing deacidification, recycling acetic acid, performing neutralization and water washing after deacidification, and finally performing decoloring, drying and filtration with activated carbon, so as to obtain acetyl trioctyl citrate. Compared with the prior art, the method for preparing acetyl trioctyl citrate, which is disclosed by the invention, is high in yield, that is, the yield is greater than 97.30%, gentle in reaction condition, short in reaction time and low in cost.

Description

technical field [0001] The invention relates to the technical field of plasticizer synthesis, in particular to a preparation method of acetyl trioctyl citrate. Background technique [0002] Citrate plasticizer is an environmentally friendly plasticizer produced from non-petroleum raw materials. It is non-toxic and safe. It is one of the first choice of environmentally friendly plasticizers in the plastic industry at home and abroad. It has good compatibility and high growth rate benefits. , non-toxic, low volatility, etc., and the plasticized plastic has good low-temperature bending properties, is heat-stable when melting materials, does not change color, and has excellent cold resistance, light resistance, water resistance, and mildew resistance. However, due to its relatively high price, it is currently mainly used in fields with high non-toxic safety requirements. The combination of acetyl trioctyl citrate and other non-toxic plasticizers can increase the hardness of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/31C07C69/67
CPCC07C67/31C07C69/67
Inventor 张磊
Owner 江苏开来医药科技有限公司