Method for continuously synthesizing cyclohexanecarboxylic acid

A technology for the synthesis of cyclohexyl formic acid, which is applied in the preparation of carboxylic acids by ozone oxidation, organic chemistry, etc., can solve the problems that the conversion rate of the synthesis reaction is difficult to reach 100%, it is not conducive to the maximization of enterprise benefits, and the synthesis reaction cycle is long. The effect of shortening the synthesis reaction cycle, benefiting enterprise benefits, and facilitating industrial production

Inactive Publication Date: 2020-06-02
内蒙古世杰化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] First, the conversion rate of the synthesis reaction is also difficult to reach 100%, which makes the use of raw materials incomplete, which is not conducive to the production of enterprises;
[0005] Second, the raw materials are not preheated in the existing reaction, so that the synthesis reaction cycle is long;
[0006] Third, heat will be generated during the synthesis reaction, but the existing synthesis methods do not rationally reuse the heat, which is not conducive to maximizing the benefits of enterprises, and at the same time, does not meet the current national environmental protection requirements

Method used

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  • Method for continuously synthesizing cyclohexanecarboxylic acid
  • Method for continuously synthesizing cyclohexanecarboxylic acid
  • Method for continuously synthesizing cyclohexanecarboxylic acid

Examples

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Embodiment 1

[0032] A method for continuous synthesis of cyclohexyl formic acid, comprising the following steps:

[0033] 1) Preheating by mixing benzoic acid and solvent cyclohexyl formic acid solvent: Benzoic acid is added through the front section of Jiaolong, then solvent cyclohexyl formic acid is added, and it is transported forward in Jiaolong, and the heated cyclohexyl formic acid product in Jiaolong’s jacket acts as a heating The material in the Jiaolong, heating the material in the Jiaolong back feeds the cyclohexyl formic acid product in the cooling jacket, the hot benzoic acid and solvent cyclohexyl formic acid coming out of the Jiaolong enter the raw material tank to obtain preheated benzoic acid and preheated cyclohexyl formic acid, and The temperature of the preheated benzoic acid and the preheated cyclohexyl formic acid is controlled at 80°C, and the cooled cyclohexyl formic acid product enters the finished product tank;

[0034] 2) Emulsion preparation: mix the preheated be...

Embodiment 2

[0038] A method for continuous synthesis of cyclohexyl formic acid, comprising the following steps:

[0039] 1) Preheating by mixing benzoic acid and solvent cyclohexyl formic acid solvent: Benzoic acid is added through the front section of Jiaolong, then solvent cyclohexyl formic acid is added, and it is transported forward in Jiaolong, and the heated cyclohexyl formic acid product in Jiaolong’s jacket acts as a heating The material in the Jiaolong, heating the material in the Jiaolong back feeds the cyclohexyl formic acid product in the cooling jacket, the hot benzoic acid and solvent cyclohexyl formic acid coming out of the Jiaolong enter the raw material tank to obtain preheated benzoic acid and preheated cyclohexyl formic acid, and The temperature of the preheated benzoic acid and the preheated cyclohexyl formic acid is controlled at 95° C., and the cooled cyclohexyl formic acid product enters the finished product tank;

[0040] 2) Emulsion preparation: mix the preheated ...

Embodiment 3

[0044] A method for continuous synthesis of cyclohexyl formic acid, comprising the following steps:

[0045] 1) Preheating by mixing benzoic acid and solvent cyclohexyl formic acid solvent: Benzoic acid is added through the front section of Jiaolong, then solvent cyclohexyl formic acid is added, and it is transported forward in Jiaolong, and the heated cyclohexyl formic acid product in Jiaolong’s jacket acts as a heating The material in the Jiaolong, heating the material in the Jiaolong back feeds the cyclohexyl formic acid product in the cooling jacket, the hot benzoic acid and solvent cyclohexyl formic acid coming out of the Jiaolong enter the raw material tank to obtain preheated benzoic acid and preheated cyclohexyl formic acid, and The temperature of the preheated benzoic acid and the preheated cyclohexyl formic acid is controlled at 110° C., and the cooled cyclohexyl formic acid product enters the finished product tank;

[0046] 2) Emulsion preparation: mix the preheated...

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Abstract

The invention relates to a method for continuously synthesizing cyclohexanecarboxylic acid in the field of fine chemical synthesis. The method comprises the following steps: 1) mixing benzoic acid anda solvent cyclohexanecarboxylic acid, and preheating; 2) preparing an emulsion; 3) preparing a mixture; and 4) carrying out gas-liquid separation. Waste heat in a cyclohexanecarboxylic acid product is used for heating an auger with a jacket, the heated auger is fed back and preheated to slowly mix and preheat solid benzoic acid and the solvent cyclohexanecarboxylic acid, the preheating temperature of the solid benzoic acid and the solvent cyclohexanecarboxylic acid is 80-135 DEG C, and the raw materials are preheated through heat generated by reaction, so that the activity of the raw materials is improved, the synthesis reaction is facilitated, and the synthesis reaction period is shortened; and the heat in the synthesis reaction is reasonably recycled, so that the maximization of enterprise benefits is facilitated, and the current national environmental protection requirements are met.

Description

technical field [0001] The invention relates to the field of synthesis of fine chemicals, in particular to a method for continuously synthesizing cyclohexylcarboxylic acid. Background technique [0002] Cyclohexylcarboxylic acid is an important intermediate in organic synthesis. It is a good photocuring agent and can also be used in the synthesis of praziquantel, a new drug for treating schistosomiasis. Its derivatives such as methyl trans-4-isopropylcyclohexylcarboxylate are intermediates in the production of the new drug nateglinide for the treatment of diabetes, so the preparation of cyclohexylcarboxylic acid plays an important role in organic synthesis. It is relatively difficult to prepare cyclohexyl formic acid by selective hydrogenation of benzoic acid under normal conditions, even with the palladium / carbon catalyst of high hydrogenation activity, its conversion rate is also difficult to reach 100%. In the process of formic acid, not only the carboxyl group of benzoi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C51/36C07C61/08
CPCC07C51/36C07C2601/14
Inventor 吉立广王惠王海艳杨勇姚敏谷远娣
Owner 内蒙古世杰化工有限公司
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