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Catalyst and preparation method and application thereof, and preparation method for durene

A production method, durene technology, applied in the direction of catalysts, molecular sieve catalysts, carbon compound catalysts, etc., can solve problems not involved in industrial applications, and achieve the effects of reducing production and use costs, simple ingredients, and convenient production and use

Active Publication Date: 2016-11-09
SINOPEC ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In the above studies on the alkylation reaction between mesitylene and methanol, ZSM-5 or other zeolite catalysts are used, and there are few reports on the use of β molecular sieves as catalysts, and no industrial applications are involved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] A β molecular sieve with a dry basis content of 200 grams and a silicon-aluminum ratio of 50, 50 grams of alumina powder, and 150 grams of water are evenly mixed, and extruded to obtain a molding material to obtain a molding material. The molding material was left to stand at room temperature for 24 hours, dried at 70°C, calcined at 550°C for 5.5 hours, and finally crushed to 20 mesh particles for later use. Use 100 milliliters of zinc nitrate aqueous solution containing 60 grams per liter of zinc to impregnate 94 grams of the above-mentioned particles for 24 hours, dry at 90 ° C and transfer to a muffle furnace for roasting in air at 550 ° C for 5 hours. The content of β molecular sieve in the catalyst obtained is 75.2% by weight, and the zinc content is 6.0% by weight.

[0056] The above-mentioned catalyst is used in the alkylation reaction of methanol and trimethylbenzene, and the reaction is carried out in a fixed-bed reactor. Specifically, the reaction temperature...

Embodiment 2

[0058] A β molecular sieve with a dry basis content of 200 grams and a silicon-aluminum ratio of 50, 35 grams of alumina powder, and 130 grams of water were uniformly mixed, and extruded to obtain a molding material. The molding material was dried at 100°C for 24 hours, calcined at 550°C for 6 hours, and finally crushed to 25 mesh particles for later use. Use 100 ml of zinc acetate aqueous solution containing 10 g / l of zinc to impregnate 99 g of the above-mentioned particles for 24 hours, dry at 120°C, transfer to a muffle furnace and roast in air at 550°C for 6 hours, and the obtained catalyst has a β molecular sieve content of 84.3%. (weight), the zinc content is 1.0% by weight.

[0059] The above catalyst is used in the alkylation reaction of methanol and mesitylene, the reaction temperature is 400°C, the reaction pressure is 2.0MPa, and the mass space velocity of mesitylene is 1.0h -1 , the molar ratio of methanol to mesitylene is 2, the conversion rate of methanol is 100...

Embodiment 3

[0061] A β molecular sieve with a dry basis content of 200 grams and a silicon-aluminum ratio of 50, 200 grams of alumina powder, and 220 grams of water were uniformly mixed, and extruded to obtain a molding material. The molding material was dried at 100°C for 24 hours, calcined at 550°C for 6 hours, and finally crushed to 30 mesh particles for later use. Use 100 ml of zinc nitrate aqueous solution containing 100 g / l of zinc to impregnate 90 g of the above particles for 24 hours, dry at 120 ° C, transfer to a muffle furnace and roast in air at 550 ° C for 6 hours, and the obtained catalyst has a β molecular sieve content of 45.0%. (weight), the zinc content is 10.0% (weight).

[0062] The above catalyst is used in the alkylation reaction of methanol and mesitylene, the reaction temperature is 400°C, the reaction pressure is 2.0MPa, and the mass space velocity of mesitylene is 2.0h -1 , the molar ratio of methanol to mesitylene is 2.0, the conversion rate of methanol is 100%,...

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PUM

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Abstract

The invention provides a catalyst and a preparation method and application thereof, and a preparation method for durene. The catalyst is mainly prepared from the following components by weight: 45 to 85% of a beta-molecular sieve, 10 to 55% of a binder and 0 to 10% of a modified element, wherein the binder is one or more selected from a group consisting of alumina, alumina sol and silica sol, and the modified element is one or more selected from a group consisting of zinc, iron, magnesium, calcium and rare earth elements. The catalyst has high catalytic activity to alkylation and can substantially improve the conversion rate of pseudocumene in preparation of durene from pseudocumene and methanol.

Description

technical field [0001] The invention relates to the field of petrochemical industry, in particular to a catalyst, its preparation method, application and the preparation method of durene. Background technique [0002] Durene is an important chemical raw material, mainly used in the production of homoanhydride, that is, pyromellitic dianhydride (PMDA). In recent years, the use of PMDA has continued to expand, for example, it can be used as an important raw material for high-quality powder coating matting agents, curing agents and plasticizers. In addition, PMDA can also be used to synthesize polyimide and so on. Polyimide is a new type of synthetic material with high temperature resistance, radiation resistance, impact resistance and excellent electrical and mechanical properties. It is widely used in the production of fibers, films, dipping paints, adhesives, casting parts and foam plastics Wait. Polyimide products have been widely used in the fields of aerospace, missile...

Claims

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Application Information

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IPC IPC(8): B01J29/70B01J29/72C07C2/86C07C15/02
CPCC07C2/864B01J29/7007B01J29/7057B01J29/7215C07C2529/70C07C2529/72C07C15/02Y02P20/52
Inventor 毛继平付春龙韩海波李欣郝代军
Owner SINOPEC ENG GRP CO LTD
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