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Preparation method of rubber antioxidant 4030

A rubber antioxidant and mixing technology, which is applied in the preparation of amino compounds, chemical instruments and methods, and preparation of organic compounds, etc., can solve the problem that rubber antioxidant 4030 cannot be mass-produced, and achieve the effect of solving the bottleneck of raw material supply.

Inactive Publication Date: 2013-05-15
JIANGSU GUOLI CHEM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, rubber antioxidant 4030 is mainly synthesized from 4-aminodiphenylamine, but 4-aminodiphenylamine is relatively scarce, so rubber antioxidant 4030 cannot be mass-produced

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0009] Mixing, 5-methyl-2-hexanone and p-phenylenediamine are mixed at a weight ratio of 3:1 at 50-70°C, and the mixed raw materials are mixed with hydrogen; heated by high-pressure raw material oil Furnace heating enters the bottom of the reactor, and the synthesis reaction occurs under the action of the catalyst palladium carbon, the reaction temperature is 140 ° C ~ 150 ° C, and the reaction pressure is 6.0Mpa;

[0010] After the reaction is over, the product liquid enters the middle part of the stripper after decompression, and the hydrogen gas blown from the bottom of the stripper is separated at a temperature of 120~220°C;

[0011] The synthetic liquid enters the middle of another stripping tower from the bottom of the stripping tower, and blows hydrogen at the bottom of the tower. After purification at a temperature of 220~240°C, the product enters the 4030 product tank from the bottom.

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PUM

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Abstract

The invention relates to a preparation method of a rubber antioxidant, in particular to a rubber antioxidant 4030. The preparation method comprises the steps of mixing, synthesizing, separating and purifying. According to the preparation method, the rubber antioxidant 4030 is produced by adopting p-phenylenediamine as a raw material instead of a process route with scarce 4-aminodiphenylamine as the raw material, the material supply bottleneck is solved, and mass production of the rubber antioxidant 4030 can be realized.

Description

technical field [0001] The invention relates to a preparation method of a rubber anti-aging agent, specifically a preparation method of rubber anti-aging agent 4030, that is, N, N,-bis(1,4-dimethylpentyl)-p-phenylenediamine. Background technique [0002] The chemical name of rubber antioxidant 4030 is N,N,-bis(1,4-dimethylpentyl)-p-phenylenediamine. This product is liquid and easy to disperse. There is no blooming problem when the amount is large. The rubber has the function of accelerating vulcanization and shortening the scorch time, and can be used alone for some rubber products that require strict anti-static ozone aging performance. At present, rubber antioxidant 4030 is mainly synthesized from 4-aminodiphenylamine, but 4-aminodiphenylamine is relatively scarce, so rubber antioxidant 4030 cannot be mass-produced. Contents of the invention [0003] In view of the above technical problems, the present invention provides a method for preparing rubber antioxidant 4030, w...

Claims

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Application Information

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IPC IPC(8): C07C211/51C07C209/18
Inventor 胡立新郎旭东宗红兴
Owner JIANGSU GUOLI CHEM TECH
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