Novel method for catalytically synthesizing acetanilide

An acetanilide and a novel technology, applied in the field of acetanilide preparation, can solve the problems such as low preparation efficiency and yield of acetanilide, and acetanilide hinders the preparation method, and achieve the effects of shortening the synthesis path, saving reaction raw materials, and easily controlling the reaction

Inactive Publication Date: 2018-04-20
新乡市锦源化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the preparation efficiency and yield of acetanilide are low, therefore, how to effectively improve the preparation efficiency and yield of acetanilide has become a major problem hindering the preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The present embodiment provides a novel catalytic method for synthesizing acetanilide, comprising the following steps:

[0038] S1: Aniline and glacial acetic acid are heated to 50°C at a rate of 2°C / min under the action of a catalyst, and then reacted. The reaction time is 15 minutes, and the stirring speed is 50r / min during the reaction;

[0039] Among them, the catalyst is a mixture of aluminum borate and manganese dioxide, and the weight ratio of aluminum borate and manganese dioxide is 2:1, the molar ratio of aniline and glacial acetic acid is 1:1.5; the mass ratio of aniline and catalyst is 100:1 .

Embodiment 2

[0041] The present embodiment provides a novel catalytic method for synthesizing acetanilide, comprising the following steps:

[0042] S1: Aniline and glacial acetic acid were heated to 51°C at a rate of 2.1°C / min under the action of a catalyst, and then reacted. The reaction time was 19 minutes, and the stirring speed was 51r / min during the reaction;

[0043] Among them, the catalyst is a mixture of aluminum borate and manganese dioxide, and the weight ratio of aluminum borate and manganese dioxide is 2.2:1, the molar ratio of aniline and glacial acetic acid is 1:2; the mass ratio of aniline and catalyst is 110:1 .

[0044] S2: Mix the solid product after the catalytic reaction with water at a mass ratio of 1:16.2, heat to boiling, then add an adsorbent and boil for 15.6 minutes, then carry out heat preservation and decompression filtration and then cool. The adsorbent is activated carbon, and the adsorbent is mixed with The mass ratio of the solid product after the catalyti...

Embodiment 3

[0046] The present embodiment provides a novel catalytic method for synthesizing acetanilide, comprising the following steps:

[0047] S1: Aniline and glacial acetic acid were heated to 52°C at a rate of 2.4°C / min under the action of a catalyst, and then reacted. The reaction time was 23 minutes, and the stirring speed was 55r / min during the reaction;

[0048] Among them, the catalyst is a mixture of aluminum borate and manganese dioxide, and the weight ratio of aluminum borate and manganese dioxide is 2.5:1, the molar ratio of aniline and glacial acetic acid is 1:2; the mass ratio of aniline and catalyst is 120:1 .

[0049] S2: Mix the solid product after the catalytic reaction with water at a mass ratio of 1:16, heat to boiling, then add an adsorbent and boil for 16 minutes, then carry out heat preservation and decompression filtration and then cool down. The adsorbent is activated carbon, and the adsorbent and catalyst The mass ratio of the solid product after the reaction...

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Abstract

The invention provides a novel method for catalytically synthesizing acetanilide and relates to the technical field of preparation of the acetanilide. The novel method for catalytically synthesizing the acetanilide comprises the following step: enabling aniline and glacial acetic acid to react under the action of a catalyst, wherein the catalyst is a mixture of aluminum borate and manganese dioxide and the weight ratio of the aluminum borate to the manganese dioxide is (2 to 4) to 1. By adopting the novel method for catalytically synthesizing the acetanilide, the blank of a preparation methodfor catalytically synthesizing the acetanilide is filled; the preparation efficiency of the acetanilide is effectively improved, so that the yield of the acetanilide is improved; the novel method hasrelatively great industrial popularization value.

Description

technical field [0001] The invention relates to the technical field of acetanilide preparation, and in particular to a novel catalytic method for synthesizing acetanilide. Background technique [0002] Acetanilide is a raw material and intermediate for sulfa drugs, rubber vulcanization accelerators, dyes and synthetic camphor, etc., and a hydrogen peroxide stabilizer for the cosmetics industry. [0003] In the prior art, the preparation efficiency and yield of acetanilide are relatively low, therefore, how to effectively improve the preparation efficiency and yield of acetanilide has become a major problem hindering the preparation method. Contents of the invention [0004] The object of the present invention is to provide a kind of method of novel catalytic synthesis of acetanilide, this method has remedied the blank of catalytic synthesis of acetanilide preparation method, has improved the preparation efficiency of acetanilide effectively, and then improved the yield of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C231/02C07C233/07B01J23/34
CPCB01J21/02B01J23/34B01J35/0006C07C231/02C07C233/07
Inventor 蔡红新魏艳军闫玲玲王元徐周庆
Owner 新乡市锦源化工有限公司
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