Process for producing acet-tributyl citrate

A technology of acetyl tributyl citrate and tributyl citrate, which is applied in the production process field of acetyl tributyl citrate, can solve the problems of long reaction cycle, large equipment investment and high production cost, and achieve short production cycle, The effect of less investment in equipment and lower production costs

Inactive Publication Date: 2009-04-08
河南庆安化工高科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a kind of acetyl tributyl citrate production process, overcome the existing complex process, long reaction cycle, large investment in equipment, produce more waste water, and high production cost

Method used

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  • Process for producing acet-tributyl citrate
  • Process for producing acet-tributyl citrate
  • Process for producing acet-tributyl citrate

Examples

Experimental program
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Effect test

Embodiment 1

[0015] like figure 2 As shown in the process flow: using citric acid and n-butanol as raw materials, the esterification reaction is carried out under the action of a catalyst. After the esterification reaction is complete, the waste heat is directly used to dealcoholize under reduced pressure to obtain the crude product of tributyl citrate, and then add acetic acid The anhydride is acetylated with a catalyst, and finally deacidified, neutralized, washed with water, distilled under reduced pressure, decolorized and filtered to obtain the acetyl tributyl citrate.

[0016] at 10m 3 Add 4t of citric acid, 5240kg of n-butanol and 40Kg of 30% sulfuric acid solution to the reaction kettle in sequence, add the remaining 760kg of n-butanol in batches, and react under reflux at 120-150°C for about 5 hours under stirring, and take samples to measure the acid value , The esterification is completed below the acid value of 2.3mgKOH / g in the middle control, and then the waste heat is used...

Embodiment 2

[0018] The quality that adds acetic anhydride is 2.11t, other is with embodiment 1.

Embodiment 3

[0020] The quality that adds acetic anhydride is 2.88t, and other is with embodiment 1.

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Abstract

The invention relates to a process for producing acetyl triethyl citrate. The method comprises the following steps: using citric acid and n-butanol as raw materials, firstly carrying out esterification reaction under the action of a catalyst, directly using waste heat to reduce pressure and remove alcohol after carrying out the esterification reaction completely, so as to obtain a crude product of triethyl citrate, and then carrying out acetylation reaction, and finally carrying out the processes of removing acid, neutralizing, water rinsing, reducing pressure and distilling, decoloring and filtering, so as to obtain the acetyl triethyl citrate. The process has the advantages of consice process, short production period reduced about 3h, low equipment investment, low discharge amount reduced about 30 percent, low energy consumption, and production cost reduced about 10 to 20 percent.

Description

(1) Technical field [0001] The invention relates to a production process of acetyl tributyl citrate. (2) Background technology [0002] At present, the production process of synthesizing acetyl tributyl citrate (abbreviated as ATBC) mainly adopts a two-step synthesis process in the industry. The first step is to use citric acid and n-butanol as raw materials, and undergo esterification, neutralization, and water washing under the action of a catalyst. , dealcoholization under reduced pressure, refined decolorization, and filtration to obtain tributyl citrate (abbreviated as TBC) boutique; the second step is to use tributyl citrate and acetic anhydride as raw materials, and then undergo acetylation, deacidification, neutralization, Wash with water, distill under reduced pressure, refine and decolorize, and filter to obtain the finished product of acetyl tributyl citrate. The process flow is as figure 1 As shown, the disadvantage is that the process is complex, the reaction ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/67C07C67/08C07C67/30C07C69/704
Inventor 刘冰宋广勋张祖礼杨振王艳丽王俊云
Owner 河南庆安化工高科技股份有限公司
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