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Polyacid solid catalyst

A solid catalyst and catalyst technology, which is applied in the field of rubber additives, can solve problems such as equipment corrosion, huge acid and alkali consumption, and high-salt wastewater discharge, so as to reduce the generation of wastewater and avoid the use of strong acid catalysts.

Pending Publication Date: 2021-04-16
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

[0010] The object of the present invention is to provide a kind of multi-acid solid catalyst, to overcome the equipment corrosion caused by hydrochloric acid catalysis in the prior art of TMQ preparation, acid-base consumption is huge, the problems such as the discharge of high-salt waste water

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Multi-acid solid catalyst:

[0029] Use dichromic acid directly.

[0030] Preparation of rubber antioxidant TMQ:

[0031] 30 g of dichromic acid, 93 g of aniline and 928 g of acetone were added to 200 g of toluene, and reacted at 160 °C for 15 h. After the reaction is finished, the water phase and dichromic acid are removed by liquid separation, and then the organic solvent is distilled off to obtain the product rubber antioxidant TMQ.

Embodiment 2

[0033] Multi-acid solid catalyst:

[0034] Direct use of molybdophosphoric acid.

[0035] Preparation of rubber antioxidant TMQ:

[0036] 30 g molybdophosphoric acid, 93 g aniline and 868 g acetone were added to 200 g toluene, and reacted at 180 °C for 12 h. After the reaction is finished, the water phase and molybdenum phosphoric acid are removed by liquid separation, and then the organic solvent is distilled off to obtain the product rubber antioxidant TMQ.

Embodiment 3

[0038] Multi-acid solid catalyst:

[0039] Direct use of silicotungstic acid.

[0040] Preparation of rubber antioxidant TMQ:

[0041] 30 g of silicotungstic acid, 93 g of aniline and 810 g of acetone were added to 200 g of toluene, and reacted at 160 °C for 12 h. After the reaction is finished, the water phase and silicotungstic acid are removed by liquid separation, and then the organic solvent is distilled off to obtain the product rubber antioxidant TMQ.

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PUM

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Abstract

The invention discloses a polyacid solid catalyst and a method for realizing environment-friendly preparation of a rubber anti-aging agent TMQ by using the catalyst. The method is mainly characterized in that a polyacid solid catalyst, namely a polyacid compound or a composite modified product of the polyacid compound and a carrier, is utilized to prepare TMQ. The polyacid solid catalyst is simple to prepare and good in catalytic effect, and can reduce the consumption of hydrochloric acid in the preparation of TMQ so as to avoid the problems of equipment corrosion, high consumption of alkali liquor, high treatment cost of three wastes and the like.

Description

technical field [0001] The invention belongs to the field of rubber additives, in particular to a multi-acid solid catalyst which can be used to catalyze the preparation of rubber anti-aging agent TMQ. Background technique [0002] Anti-aging agent TMQ is one of the most demanded rubber anti-aging agents in domestic and foreign markets. Its main components are di-, tri-, and tetra-polymers of 2,2,4-trimethyl-1,2-dihydroquinoline. [0003] At present, the domestic preparation of TMQ mainly adopts "one-step method", that is, aniline and acetone are usually used as raw materials, and under the catalysis of hydrochloric acid, it is prepared through a series of steps such as salt formation, condensation, polymerization, neutralization, and distillation. The hydrochloric acid catalyst makes the preparation of TMQ often face problems such as serious equipment corrosion, huge consumption of alkaline water, and high cost of three wastes. [0004] In order to overcome the above-menti...

Claims

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Application Information

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IPC IPC(8): B01J23/26B01J31/16B01J31/18B01J29/03B01J37/34B01J37/08C07D215/06
Inventor 吕明倩韦志强张伟江洋洋黄伟高留冕
Owner SINOPEC NANJING RES INST OF CHEM IND CO LTD
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