Method for co-producing triacetonamine and isophorone

A technology of isophorone and triacetone amine, applied in the field of compound synthesis, can solve the problems of non-recyclable catalyst, generation of solid waste salt, difficult control of the selectivity of triacetone amine and isophorone, etc. Efficient co-production and simple post-processing effects

Pending Publication Date: 2021-03-09
安徽兴欣新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, there are few reports on the synthesis method for the co-production of triacetone amine and isophorone, and the catalyst used

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 232 g of acetone was added to the reactor, and after 17 g of ammonia gas was transferred, 20 g of solid sodium hydroxide was added, raised to 60 ° C, after 6 h, sampling analysis. In a gas phase spectrum, the conversion of acetone is 60%, and the selectivity of trifacenazone is 35%, and the selectivity of isophorone is 40%.

Embodiment 2

[0028] The preparation process is exactly the same as in Example 1, the difference is that the reaction temperature is 80 ° C, the reaction liquid passes through gas chromatography, the conversion of acetone is 66%, and the selectivity of trifacenamamine is 33%, and isophorone The selectivity is 46%.

Embodiment 3

[0030] The preparation process is exactly the same as in Example 1, and the difference is that the catalyst is tetrabutylammonium hydroxide, and the reaction liquid is passed by gas chromatography. The conversion of the acetone is 51%, and the selectivity of trifacenazone is 40%. Sex is 34%.

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PUM

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Abstract

The invention discloses a method for co-producing triacetonamine and isophorone, and relates to the technical field of compound synthesis. The synthesis method comprises the following steps: adding raw materials acetone, ammonia gas and a basic catalyst into a reaction kettle, stirring and reacting at the reaction temperature of 50-100 DEG C for 4-10 hours to obtain a reaction solution containingtriacetonamine and isophorone, carrying out vacuum rectification, continuously applying front fractions, and separating to obtain the triacetonamine and the isophorone. According to the method, the basic catalyst is adopted to catalyze dehydration condensation of acetone to generate mesityl oxide, and further catalyze themesityl oxide and acetone to generate phorone and isophorone, so that efficient co-production of the triacetonamine and the isophorone is realized; post-treatment is simple, the catalyst can be recycled, and no solid waste salt is generated; and the ratio of reaction raw materials is adjustable, and the selectivity of triacetonamine and isophorone is easy to control.

Description

Technical field [0001] The present invention relates to the field of compound synthesis, and more particularly to a method of co-generated tropropamine and isoophorone. Background technique [0002] Trimpopylamine, chemical name 2,2,6,6-tetramethylpiperidone, the only parent as a synthetic hindered amine light stabilizer (HALS), is the most important intermediate for producing HALS for derivatives 2, 2,6,6-tetramethylpiperidol, 2,2,6,6- tetramethylpiperidotine and the most commonly used HALS of the current market. With the growing demand in the photostacer market, trisprid ammine synthesis has been widely concerned about scientists, and related synthetic research reports have emerged. [0003] The current literature reported that the trifacenamine synthesis route is mainly divided into the following: [0004] 1) One-step: Acetone and ammonia are raw materials, using acidic catalyst catalytic synthesis, commonly used catalysts are mainly ammonium nitrate (US 427521), CAY molecular...

Claims

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Application Information

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IPC IPC(8): C07D211/74C07C45/74C07C45/82C07C49/603C07C49/203
CPCC07D211/74C07C45/74C07C45/82C07C2601/16C07C49/603C07C49/203Y02P20/584
Inventor 方旺旺刘帅俞肖哲任梦浩
Owner 安徽兴欣新材料有限公司
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