Preparation of vermiculite-loaded phosphotungstic acid green catalyst and application thereof

A technology of phosphotungstic acid and catalyst, which is applied in the field of preparation of vermiculite-loaded phosphotungstic acid green catalyst, which can solve the problems of difficult separation of catalysts, corrosion of equipment, pollution of the environment, etc., and achieves easy separation and purification, weakened high-temperature sintering, and high catalytic activity Effect

Inactive Publication Date: 2021-02-26
昌吉学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcomings of the catalyst in the traditional preparation process of cyclohexene, such as difficult separation of catalysts, corrosion of equipment, pollution of the environment, etc., and provide a vermiculite-loaded phosphotungstic acid green catalyst that is easy to recycle.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Catalyst preparation method with 0.1 g of binder (AD): Dissolve 0.1 g of binder in 2 mol / L acid, the dosage is 10 ml, magnetically stir at room temperature for 10 min until completely dissolved, then add 1 g of high temperature Roast the vermiculite powder, stir at room temperature for 1 h to make it evenly mixed, then add the previously prepared phosphotungstic acid solution (0.6 g of phosphotungstic acid dissolved in 5 ml of deionized water), stir in an oil bath at 80 °C for 12 h, then place in 100 ℃ water bath, stirred and evaporated to dryness, dried in an oven at 100 ℃ for 6 h, and calcined in a muffle furnace at 200 ℃ for 4 h to obtain a phosphotungstic acid-supported catalyst, marked as PW0.6-0.1AD / 1aEVM.

Embodiment 2

[0040] Catalyst preparation method with a binder dosage of 0.2 g: where the binder is 0.2 g, and other steps are the same as those described in Example 1, marked as PW0.6-0.2AD / 1aEVM.

Embodiment 3

[0042] Catalyst preparation method with a binder dosage of 0.3 g: wherein the binder is 0.3 g, and other steps are the same as those described in Example 1, marked as PW0.6-0.3AD / 1aEVM.

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PUM

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Abstract

The invention belongs to the technical field of chemical engineering, and particularly relates to preparation of a vermiculite-supported phosphotungstic acid green catalyst and an application thereof,which is a phosphotungstic acid supported catalyst prepared by taking phosphotungstic acid as an active species, taking vermiculite modified by high-temperature roasting sulfuric acid as a carrier and taking one of sodium hexametaphosphate, sodium phosphate and sodium silicate as a binder. The catalyst is applied to research on catalytic performance of a heterogeneous reaction system for preparing cyclohexene through cyclohexanol dehydration, when 0.3 g of the binder, 0.6 g of phosphotungstic acid, 1 g of modified vermiculite and 0.6 g of the catalyst are used, the cyclohexene selectivity is100%, the yield reaches 93.70%, the catalyst can be recycled after the reaction is completed, and the catalyst still has high yield after being repeatedly used for 8 times.

Description

technical field [0001] The invention relates to the preparation and application of a vermiculite-loaded phosphotungstic acid green catalyst, which belongs to the technical field of chemical industry. Background technique [0002] As an important organic chemical intermediate material, cyclohexene is often used in the synthesis of pesticides, medicines and high polymers. In addition, it is used in the preparation of catalysts and solvents in chemical production, and in the petroleum industry as extractants and high-octane number stabilizers. , which is in great demand and widely used. In the traditional industrial production of cyclohexene, concentrated sulfuric acid is usually used as a catalyst to dehydrate cyclohexanol in liquid phase. Concentrated sulfuric acid as a catalyst has the disadvantages of corroding equipment, serious carbonization, low yield (70%), polluting the environment, and difficulty in recycling the catalyst. In recent years, with the introduction of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/18B01J35/10B01J37/02C07C1/24C07C13/20
CPCB01J27/188B01J23/30B01J35/1004B01J37/0201C07C1/24C07C13/20Y02P20/584
Inventor 巩建军薛来奇刘颖宋武林董庆孟曹江风田舟琪洪亮张萌
Owner 昌吉学院
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