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Synthetic method of composite anti-aging agent

A synthesis method and anti-aging agent technology, applied in organic chemistry, reductive alkylation preparation, etc., can solve the problems of waste of raw materials, difficulty in raw material recovery, etc., and achieve the effect of reducing processing difficulty, simple method, and low temperature

Inactive Publication Date: 2021-03-05
SINOPEC NANJING RES INST OF CHEM IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method prepared anti-aging agent 688 with high efficiency. The main defect is that in the reaction product, the ratio of 2-octanol to 2-octanone is about 4:1, that is, a large amount of large raw material 2-octanone is converted into 2-octanone Alcohol, resulting in waste of raw materials, and brings certain difficulties to the subsequent recovery of raw materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] On the fixed bed in the laboratory, 100ml of platinum-carbon catalyst with a platinum content of 0.1% is filled in the fixed bed layer, and the raw materials 2-octanone and 4-aminodiphenylamine are configured into a solution at a molar ratio of 4.5:1, according to the setting The pump enters the raw material and reacts under certain conditions, and the space velocity of the reaction liquid is 0.10h -1 , the reaction pressure is 0.6MPa, the reaction temperature is 120°C, the reaction solution 1# is collected for gas spectrometry analysis, and the content of antioxidant 688 and the degree of transalcoholization of the raw material 2-octanone are analyzed.

Embodiment 2

[0026] On the fixed bed in the laboratory, 100ml of platinum-carbon catalyst with a platinum content of 0.1% is filled in the fixed bed layer, and the raw materials 2-octanone and 4-aminodiphenylamine are configured into a solution at a molar ratio of 4.5:1, according to the setting The pump enters the raw material and reacts under certain conditions, and the space velocity of the reaction liquid is 0.12h -1 , the reaction pressure is 0.8MPa, the reaction temperature is 135°C, the reaction solution 2# is collected for gas spectrometry analysis, and the content of antioxidant 688 and the degree of transalcoholization of the raw material 2-octanone are analyzed.

Embodiment 3

[0028] On the fixed bed in the laboratory, 100ml of platinum-carbon catalyst with a platinum content of 0.1% is filled in the fixed bed layer, and the raw materials 2-octanone and 4-aminodiphenylamine are configured into a solution at a molar ratio of 4.5:1, according to the setting The pump enters the raw material and reacts under certain conditions, and the space velocity of the reaction liquid is 0.15h -1 , the reaction pressure is 1.0MPa, the reaction temperature is 150°C, the reaction solution 3# is collected for gas spectrometry analysis, and the content of anti-aging agent 688 and the degree of transalcoholization of raw material 2-octanone are analyzed.

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Abstract

The invention provides a synthetic method of a composite anti-aging agent. According to the method, 2-octanone and 4-aminodiphenylamine are used as basic raw materials, continuous condensation hydrogenation reaction is carried out in a platinum-carbon catalyst and a fixed bed, and certain reaction conditions are controlled to obtain an anti-aging agent 688. The anti-aging agent 688 is produced byusing a more efficient catalyst, so that the ratio of converting the reaction raw material 2-octanone into 2-octanol is reduced, the utilization rate of the reaction raw materials is improved, and thetreatment difficulty of a reaction liquid is reduced. The anti-aging agent 688 and an anti-aging agent TMQ are compounded according to a certain proportion under the conditions of nitrogen protectionand heating to produce an anti-aging agent 8PPD.

Description

technical field [0001] The invention relates to the synthesis of anti-aging agent 688 and the compounding method of anti-aging agent 8PPD, belonging to the field of fine chemical industry. Background technique [0002] Anti-aging agent 688, also known as anti-aging agent OPPD, chemical name is N-sec-octyl-N'-phenyl-p-phenylenediamine. Dark brown viscous liquid. Density 1.003. The freezing point is 10°C. The boiling point is 430°C. Antiozonant for natural rubber and synthetic rubber, also has a good protective effect on flex cracking. Good compatibility with rubber and low volatility. It is suitable for tires, sealing strips, hoses, tapes and various industrial rubber products. [0003] The anti-aging agent described in the invention, N-sec-octyl-N'-phenyl-p-phenylenediamine, was first produced by Universal Oil Chemical Company of the United States with the brand name UOP688, which was authorized as a trademark in June 1962. [0004] US3366684A patent has introduced th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/18C08K5/3437C07C209/26C07C211/54
CPCC08K5/18C08K5/3437C07C209/26
Inventor 任磊陶建青黄伟何志勇
Owner SINOPEC NANJING RES INST OF CHEM IND CO LTD
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