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Dechlorination catalyst and application thereof

A catalyst and dechlorination technology, applied in the fields of organic chemistry, bulk chemical production, chemical instruments and methods, etc., can solve the problems of low catalytic efficiency and harsh catalytic conditions, and achieve the goal of being beneficial to industrial production, mild catalytic conditions, and scalable Effect of contact area

Inactive Publication Date: 2016-02-03
PURESCI ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a dechlorination catalyst to solve the problems of low catalytic efficiency and harsh catalytic conditions in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation of embodiment 1 catalyst

[0029] Preparation:

[0030] (1) Dissolve anhydrous sodium metasilicate in dimethyl sulfoxide, pass hydrogen chloride gas into dimethyl sulfoxide under the condition of nitrogen protection, and react on a shaker at 40° C. for 3 hours;

[0031] (2) Maintain nitrogen protection conditions, add palladium nitrate and aluminum chloride to the mixed system obtained in step (1), and react for 5 hours at 75° C. on a shaker;

[0032] (3) Add polyacrylamide to the mixed system obtained in step (2), fully mix, and get the gel after the sol is complete;

[0033] (4) Rinse the gel obtained in step (3) with deionized water for 2 to 3 times, dry with sodium sulfite, and finally roast at 750° C. for 2 hours to obtain a dechlorination catalyst.

[0034] In steps (1)-(3), the reagents used are all anhydroused.

[0035] In step (1), the weight ratio of anhydrous sodium metasilicate to organic solvent is 1:380.

[0036] In step (1), the molar ...

Embodiment 2

[0044] The dechlorination catalysts prepared in Example 1, Comparative Example 1 and Comparative Example 2 were used in the dechlorination and degradation reaction of 3-chlorophenol. According to the conversion of the reaction rate, the catalytic efficiency of the dechlorination catalyst in Example 1 is set to 1, the catalytic efficiency in Comparative Example 1 is 0.82, and the catalytic efficiency in Comparative Example 2 is 0.67.

Embodiment 3

[0046] The dechlorination catalyst prepared in Example 1 and the existing palladium-aluminum catalyst (according to the document "the dechlorination degradation of 3-chlorophenol by palladium / aluminum bimetallic system" ("Journal of Environmental Engineering", 2012, the second phase: 381-384)) in the method preparation) for the dechlorination degradation reaction of 3-chlorophenol. According to the conversion of the reaction rate, the catalytic efficiency of the dechlorination catalyst in Example 1 is assumed to be 1, and the catalytic efficiency of commercially available Raney nickel is 0.79.

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PUM

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Abstract

The invention discloses a dechlorination catalyst. The dechlorination catalyst is prepared by a reaction of sodium metasilicate and a metal source in an organic phase environment. Compared with the existing dechlorination catalyst, the dechlorination catalyst provided by the invention can dispersedly fix palladium and aluminum with catalysis effects to a silica gel carrier so that a contact area of the catalysis ingredients and a reaction substrate is increased. Compared with the existing dechlorination catalyst, the dechlorination catalyst provided by the invention has higher catalysis efficiency, needs mild catalysis conditions and is conducive to industrial production. The catalysis method utilizing the dechlorination catalyst is finished under the pure organic phase condition. Compared with the common water-containing condition, the pure organic phase condition improves dechlorination catalyst catalysis efficiency.

Description

technical field [0001] The invention belongs to the field of catalysts, and in particular relates to a dechlorination catalyst and its application. 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 13.5 million tons, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/44C07C39/04C07C37/00
CPCY02P20/52
Inventor 贾东新焦德华何玲丽
Owner PURESCI ENVIRONMENTAL TECH CO LTD
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