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A kind of preparation method of lithium-supported silica gel catalyst

A catalyst and silica gel technology, which is applied in the field of preparation of lithium-loaded silica gel catalysts, can solve the problems of low catalytic efficiency and harsh catalytic conditions of lithium catalysts, and achieve the effects of favorable industrial production, mild catalytic conditions and high catalytic efficiency

Inactive Publication Date: 2016-09-07
PURESCI ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Purpose of the invention: The purpose of the present invention is to provide a practical lithium-loaded silica gel catalyst to solve the problems of low catalytic efficiency and harsh catalytic conditions of lithium catalysts in current industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Materials: Lithium chloride powder 10g, silicic acid hydrosol 1000g, polyacrylamide 3g, 0.5mol / L hydrochloric acid solution, 0.5mol / L ammonia solution.

[0018] Preparation method: (1) Dissolve 1000g silicic acid hydrosol in 0.5mol / L dilute hydrochloric acid, and stir for 10min;

[0019] (2) Dissolving 10 g of lithium chloride powder in the mixed system obtained in step (1), adjusting the pH to 3.5 with 0.5 mol / L aqueous hydrochloric acid and 0.5 mol / L ammonia solution;

[0020] (3) Add 3 g of polyacrylamide to the mixed system obtained in step (2) and stir until the sol is completely gelled;

[0021] (4) The gel obtained in step (3) was washed with deionized water, dried and then calcined at 500° C. for 3 hours to obtain a lithium-loaded silica gel catalyst.

Embodiment 2

[0023] Materials: Lithium chloride powder 10g, silicic acid hydrosol 850g, polyacrylamide 1.7g, 0.3mol / L hydrochloric acid aqueous solution, 0.5mol / L hydrochloric acid aqueous solution, 0.5mol / L ammonia aqueous solution.

[0024] Preparation method: (1) Dissolve 850g silicic acid hydrosol in 0.3mol / L dilute hydrochloric acid, and stir for 20min;

[0025] (2) Dissolving 10 g of lithium chloride powder in the mixed system obtained in step (1), adjusting the pH to 3 with 0.5 mol / L aqueous hydrochloric acid and 0.5 mol / L ammonia solution;

[0026] (3) Add 1.7 g of polyacrylamide to the mixed system obtained in step (2) and stir until the sol is completely gelled;

[0027] (4) The gel obtained in step (3) was washed with deionized water, dried and then calcined at 500° C. for 2 hours to obtain a lithium-loaded silica gel catalyst.

Embodiment 3

[0029] Materials: Lithium chloride powder 10g, silicic acid hydrosol 2000g, polyacrylamide 10g, 1mol / L hydrochloric acid aqueous solution, 0.5mol / L hydrochloric acid aqueous solution, 0.5mol / L ammonia aqueous solution.

[0030] Preparation method: (1) Dissolve 2000g silicic acid hydrosol in 1mol / L dilute hydrochloric acid, and stir for 10min;

[0031] (2) Dissolving 10 g of lithium chloride powder in the mixed system obtained in step (1), adjusting the pH to 4 with 0.5 mol / L hydrochloric acid aqueous solution and 0.5 mol / L ammonia solution;

[0032] (3) Add 10 g of polyacrylamide to the mixed system obtained in step (2) and stir until the sol is completely gelled;

[0033] (4) The gel obtained in step (3) was washed with deionized water, dried and then calcined at 400° C. for 4 hours to obtain a lithium-loaded silica gel catalyst.

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Abstract

The invention discloses a preparation method of a lithium-loaded silica gel catalyst, which is prepared by gelling silicic acid hydrosol and lithium chloride powder. The invention disperses and fixes the catalytic lithium on the silica gel carrier, and compared with the prior art, the catalytic efficiency is higher, the required catalytic conditions are milder, and it is beneficial to industrial production.

Description

technical field [0001] The invention belongs to the field of metal catalysts, and in particular relates to a preparation method of a lithium-loaded silica gel catalyst. Background technique [0002] Low-carbon olefins such as ethylene and propylene are the most basic raw materials in the petrochemical industry. Taking ethylene as an example, about 75% of petrochemical products are produced from ethylene, which is mainly used to produce polyethylene, polyvinyl chloride, ethylene oxide / ethylene glycol, dichloroethane, styrene, polystyrene, Ethanol, vinyl acetate and other important organic chemical products, in fact, ethylene production has become a symbol to measure the development level of a country's petrochemical industry. [0003] Statistics show that from 1990 to 2003, my country's ethylene equivalent consumption increased by an average of 12% per year, and the growth rate thereafter was even more astonishing. In 2003, my country's ethylene equivalent consumption was 13...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/04
Inventor 贾东新焦德华何玲丽
Owner PURESCI ENVIRONMENTAL TECH CO LTD
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