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Catalyst for vinyl toluene production and preparation method thereof

A technology of vinyl toluene and catalysts, applied in the direction of molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., to achieve the effects of low energy consumption, increased conversion rate, and high conversion rate of raw materials

Active Publication Date: 2019-01-29
JIANGSU ZHENGDAN CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the existing technical problems, provide a catalyst for the production of vinyl toluene and its preparation method, reduce production energy consumption by using metal-loaded molecular sieves, improve the conversion rate of methyl ethyl benzene and the selectivity of vinyl toluene

Method used

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  • Catalyst for vinyl toluene production and preparation method thereof
  • Catalyst for vinyl toluene production and preparation method thereof
  • Catalyst for vinyl toluene production and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1. Catalyst preparation

[0032] Synthetic process of vanadium-modified molecular sieve: Add 1 part of alumina, 0.01 part of sodium orthovanadate, 0.05 part of sodium hydroxide, and 0.1 part of adamantane into 1 part of distilled water, mix well, and add 30 parts of diatomaceous earth while stirring , after 2h, transferred to a stainless steel autoclave, airtight, under dynamic stirring, crystallized at 150°C, and reacted for 12h. The product is filtered, washed and dried to obtain the vanadium-modified molecular sieve raw powder.

[0033] In parts by weight, add 6 parts of vanadium-modified molecular sieve raw powder, ferric nitrate, magnesium nitrate, and 5 parts of cement to 10 parts of distilled water, disperse uniformly by ultrasonic, dry, knead, extrude, and roast at 480°C for 24 hours to obtain Iron magnesium vanadium supported molecular sieve catalyst 1. Wherein, the consumption of described iron salt and magnesium salt is, according to the weight of the oxide...

Embodiment 2

[0036] 1. Catalyst preparation

[0037] Synthetic process of vanadium-modified molecular sieve: Add 1 part of aluminum trichloride, 0.04 part of sodium orthovanadate, 0.15 part of sodium hydroxide, and 0.2 part of phosphoadamantane into 1 part of distilled water, mix well, and add 45 A part of amorphous silica, after 2 hours, transferred to a stainless steel autoclave, sealed, crystallized at 160°C under dynamic stirring, and reacted for 14 hours. The product is filtered, washed and dried to obtain the vanadium-modified molecular sieve raw powder.

[0038]In parts by weight, add 7 parts of vanadium-modified molecular sieve raw powder, ferric nitrate, magnesium nitrate, and 7 parts of cement to 10 parts of distilled water, ultrasonically disperse evenly, dry, knead, extrude, and roast at 500°C for 36 hours to obtain Iron magnesium vanadium supported molecular sieve catalyst 2. Wherein, the consumption of described iron salt and magnesium salt is, according to the weight of th...

Embodiment 3

[0041] 1. Catalyst preparation

[0042] Synthesis process of vanadium-modified molecular sieve: add 1 part of sodium metaaluminate, 0.07 part of sodium metavanadate, 0.25 part of sodium hydroxide, and 0.4 part of adamantane into 1 part of distilled water, mix well, and add 55 parts of alkali under stirring After 2 hours, the silica sol was transferred to a stainless steel autoclave, sealed, and crystallized at 170°C under dynamic stirring, and reacted for 16 hours. The product is filtered, washed and dried to obtain the vanadium-modified molecular sieve raw powder.

[0043] In parts by weight, add 8 parts of vanadium-modified molecular sieve raw powder, ferric nitrate, magnesium nitrate, and 10 parts of cement to 10 parts of distilled water, disperse uniformly by ultrasonic, dry, knead, extrude, and roast at 510 ° C for 48 hours to obtain Iron magnesium vanadium supported molecular sieve catalyst 3. Wherein, the consumption of described iron salt and magnesium salt is, accor...

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Abstract

The invention discloses a catalyst for vinyl toluene production and a preparation method thereof. The catalyst is prepared from the following components in parts by weight: 6-10 parts of vanadium modified molecular sieve, 60-75 parts of iron oxide, 14-15 parts of magnesium oxide and 5-15 parts of an adhesive. The preparation method of the catalyst comprises the following steps: firstly performing synthesis and crystallization in a high-pressure reactor to obtain the vanadium modified molecular sieve; secondly, performing ultrasonic dispersion on the vanadium modified molecular sieve raw powder, ferric salt and magnesium salt; then adding the adhesive, kneading and performing extrusion forming on the mixture, and finally, roasting the mixture, thereby obtaining a iron-magnesium-vanadium loaded molecular sieve catalyst. When applied to production of vinyl toluene by dehydrogenizing methyl-ethylbenezene, the prepared catalyst has the advantages of high raw material conversion rate, good product selectivity, low energy consumption, capability of inhibiting carbon deposition on the surface of the catalyst, and the like.

Description

technical field [0001] The invention relates to an iron-magnesium-vanadium-loaded molecular sieve catalyst for producing vinyltoluene and a preparation method thereof, specifically refers to an iron-magnesium-vanadium-loaded molecular sieve catalyst suitable for catalytic dehydrogenation of methyl ethyl benzene to synthesize vinyltoluene, belonging to chemical technology field. Background technique [0002] Vinyl toluene (VT) is an important chemical intermediate, which is generally produced by catalytic dehydrogenation of ethyltoluene (ET). Vinyltoluene is a new type of low-toxicity and low-volatility polymer monomer, similar in properties to styrene, and can replace styrene to prepare anion exchange resins, plastics, rubber, coatings and selective ion exchange membrane raw materials, etc., and make the target product It has excellent properties of high temperature resistance, organic solvent resistance and chemical corrosion resistance. The most valuable in industry is t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/076C07C5/333C07C15/46
CPCY02P20/52
Inventor 曹正国王福李江华王钰翔
Owner JIANGSU ZHENGDAN CHEM IND CO LTD
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