Preparation method of catalyst of trimellitic anhydride

A technology of trimellitic anhydride and catalyst, which is applied in the field of catalyst preparation of trimellitic anhydride, can solve the problems of poor catalyst stability, affecting TMA yield, low catalyst yield, etc., and achieves the effects of convenient material acquisition, stability assurance, and simple preparation method

Inactive Publication Date: 2019-03-22
黄山利臻新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the existing homogeneous aqueous solution composition containing at least two kinds of cobalt, manganese and titanium added in the process of preparing TMA has a low yield as a catalyst, and a certain amount of tetrabromoethane and tetrabromoethane are added on this basis. Butyl ammonium chloride mixed solution can further improve its productive rate, and on the preparation method of the catalyzer of existing TMA, there is the poor stability of catalyzer, and the activity of catalyzer is lower, affects the productive rate of the production of TMA, for this reason we need Develop a kind of catalyst preparation method of trimellitic anhydride to solve the above problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A catalyst for trimellitic anhydride, consisting of the following components in percentage by weight: 10 parts of acetic acid, 5 parts of metal ion liquid, 2 parts of tetrabromoethane and tetrabutylammonium chloride mixed solution, 7 parts of stabilizer and 3 parts of surfactant share.

[0024] Concrete, a kind of catalyst of trimellitic anhydride, its preparation method is as follows:

[0025] 1) Preparation of metal ionic liquid: In a reactor equipped with a stirrer and a heater, add at least one of titanium, cobalt and manganese and an aqueous acetic acid solution, and then add hydrogen peroxide and its volume ratio of material to liquid is 1:10 , at a temperature of 40°C, stirring continuously for 0.5 h to obtain a metal ionic liquid for use;

[0026] 2) Preparation of tetrabromoethane and tetrabutylammonium chloride mixture: In a reactor equipped with a stirrer and a heater, add tetrabromoethane and tetrabutylammonium chloride at a mass fraction ratio of 1:0.8 , ...

Embodiment 2

[0033] A catalyst for trimellitic anhydride, consisting of the following components in percentage by weight: 15 parts of acetic acid, 4 parts of metal ion liquid, 1 part of mixed solution of tetrabromoethane and tetrabutylammonium chloride, 7 parts of stabilizer and 7 parts of surfactant share.

[0034] Concrete, a kind of catalyst of trimellitic anhydride, its preparation method is as follows:

[0035] 1) Preparation of metal ionic liquid: In a reactor equipped with a stirrer and a heater, add at least one of titanium, cobalt and manganese and an aqueous acetic acid solution, then add hydrogen peroxide, and at a temperature of 80°C , stirring continuously, the stirring time is 1.5h, and the metal ionic liquid is obtained for subsequent use;

[0036] 2) Preparation of tetrabromoethane and tetrabutylammonium chloride mixture: in a reactor equipped with a stirrer and a heater, add tetrabromoethane and tetrabutylammonium chloride in a mass fraction ratio of 1:1.0 , reacting at ...

Embodiment 3

[0043] A catalyst for trimellitic anhydride, consisting of the following components in percentage by weight: 25 parts of acetic acid, 2 parts of metal ion liquid, 1 part of mixed solution of tetrabromoethane and tetrabutylammonium chloride, 10 parts of stabilizer and 8 parts of surfactant share.

[0044] Concrete, a kind of catalyst of trimellitic anhydride, its preparation method is as follows:

[0045] 1) Preparation of metal ionic liquid: In a reactor equipped with a stirrer and a heater, add at least one of titanium, cobalt and manganese and an aqueous acetic acid solution, then add hydrogen peroxide, and at a temperature of 100°C , stirring continuously, the stirring time is 1h, and the metal ionic liquid is obtained for subsequent use;

[0046] 2) Preparation of tetrabromoethane and tetrabutylammonium chloride mixture: In a reactor equipped with a stirrer and a heater, add tetrabromoethane and tetrabutylammonium chloride at a mass fraction ratio of 1:0.5 , reacting at ...

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Abstract

The invention relates to the technical field of catalyst preparation, in particular to a preparation method of a catalyst of trimellitic anhydride. The catalyst is prepared from the following components in parts by weight: 15 to 20 parts of acetic acid, 2 to 4 parts of metal ionic liquid, 1 to 1.5 parts of a tetrabromoethane and tetrabutyl ammonium chloride mixed solution, 7 to 9 parts of a stabilizer and 5 to 7 parts of a surfactant. The preparation method of the catalyst comprises the following steps: preparation of the metal ionized liquid: adding at least one of titanium, cobalt and manganese and an acetic acid water solution in a reactor which is provided with a stirrer and a heater, then adding hydrogen peroxide, continuously stirring under the condition that the temperature is 40 to140 DEG C, and controlling the stirring time to be 0.5 to 1.5 hours, thus obtaining the metal ionic liquid for standby use. According to the preparation method of the catalyst of the trimellitic anhydride, provided by the invention, tetrabromoethane and the tetrabutyl ammonium chloride are added on the basis of catalysts of titanium, cobalt and manganese, the yield of the trimellitic anhydride isincreased, and the using quality of the catalyst is increased under the action of the surfactant and the stabilizer.

Description

technical field [0001] The invention relates to the technical field of catalyst preparation, in particular to a catalyst preparation method for trimellitic anhydride. Background technique [0002] The role of the catalyst can be mainly attributed to three aspects: one is to increase the reaction speed and increase the reaction efficiency; the other is to determine the reaction path and have excellent selectivity, such as only hydrogenation and dehydrogenation reactions, and no hydrogenation decomposition and dehydration reactions; The third is to reduce the reaction temperature. [0003] As everyone knows, the homogeneous aqueous solution composition containing at least two kinds of cobalt (Co2+), manganese (Mn2+), bromine (Br-) is mainly used in PTA (abbreviation for terephthalic acid) and TMA (trimellitic anhydride) manufacturing industry, and as Catalyst is used, and the preparation method of PTA catalyst composition general at home and abroad is to adopt at least two ki...

Claims

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Application Information

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IPC IPC(8): B01J31/06C07D307/89
CPCB01J31/06B01J2231/4288C07D307/89
Inventor 孔令洪潘水木方文斌
Owner 黄山利臻新材料科技有限公司
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