Method for synthesizing antioxidant 1076 by use of novel titanium-containing catalyst

A technology of titanium catalyst and antioxidant, which is applied in the field of synthesizing antioxidant 1076 with a new titanium-containing catalyst, can solve the problems of low product yield, low reaction speed, complicated recrystallization process, etc., achieve high yield and accelerate reaction , Simplify the effect of post-processing

Inactive Publication Date: 2016-02-24
TIANJIN CHENGUANG CHEM
View PDF0 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] According to the statistical information of the "Antioxidant Industry Conference", at present, dibutyltin is mainly used as a catalyst to synthesize

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0011] A method for synthesizing antioxidant 1076 with a new titanium-containing catalyst, the addition reaction of 2,6-phenol and methyl ester to prepare 3,5-ester, and then the esterification of 3,5-ester and octadecyl alcohol The exchange reaction generates antioxidant 1076, and finally recrystallizes to obtain the product; the feature is that the catalyst used in the addition reaction and transesterification reaction is a titanium-containing catalyst. The above-mentioned titanium-containing catalyst adopts tetrabutyl titanate, (tetra)isopropyl titanate, and n-butyl titanate. The amount of titanium-containing catalyst used in the above addition reaction is 0.18% of the mass fraction of 2,6-phenol. The amount of titanium-containing catalyst used in the above transesterification reaction is 1.5% of the mass fraction of 3,5-ester. The reaction time of the above transesterification reaction is 2.5-3 hours, the reaction end point temperature is 110-120° C., and the reaction pre...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

A method for synthesizing an antioxidant 1076 by the use of a novel titanium-containing catalyst comprises the following steps: 2,6-phenol and methyl ester are subjected to an addition reaction to prepare 3,5-ester; 3,5-ester and octadecyl alcohol are subjected to an ester-exchange reaction to generate an antioxidant 1076; and finally, recrystallization is carried out to obtain a product. The method is characterized in that a catalyst used in the addition reaction and the ester-exchange reaction is a titanium-containing catalyst. The novel titanium-containing catalyst used in the invention has good catalytic performance in the ester-exchange reaction for synthesis of the antioxidant 1076. By the method, product content reaches 99% and above, light transmittance 425 nm reaches 98.8% and above, and yield reaches 97% and above. The novel titanium catalyst has more excellent performance than catalysts such as sodium methylate, potassium hydroxide, lithium amide, organo-tin and the like when used in the esterification reaction of the antioxidant 1076. By the use of the titanium catalyst, the reactions are accelerated, the process of aftertreatment-recrystallization is simplified, and high yield is obtained.

Description

Technical field: [0001] The present invention relates to a production method of chemical products, in particular to a method for synthesizing antioxidant 1076 with a novel titanium-containing catalyst. Background technique: [0002] Antioxidant 1076 is a phenolic oxidant. It is an excellent non-polluting and non-toxic antioxidant. It has good compatibility, no coloring, washing resistance, low volatility, and good heat resistance and water extraction resistance. Widely used in polyolefin, polyamide, polyester, polyvinyl chloride, ABS resin and various rubber and petroleum products. Antioxidant 1076 has a synergistic effect with ultraviolet absorbers, and is often used in conjunction with auxiliary antioxidant 168 to improve the antioxidant effect. [0003] According to the statistical information of the "Antioxidant Industry Conference", at present, dibutyltin is mainly used as a catalyst to synthesize antioxidant 1076 at home and abroad, but this method has a low reaction ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C07C69/732C07C67/03
Inventor 邢燕红王辰任永成张建起王辉
Owner TIANJIN CHENGUANG CHEM
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap