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Mercury-free catalyst for synthesizing vinyl chloride through renewable reaction and preparation method of mercury-free catalyst

A technology for reacting vinyl chloride and mercury catalysts, which is applied in the direction of catalyst activation/preparation, hydrogen halide addition preparation, chemical instruments and methods, etc., which can solve the problems of high production costs, reduce production costs, save production funds, and facilitate large-scale investment The effect of using

Inactive Publication Date: 2021-12-31
XINHUANG XINZHONG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing mercury-free catalyst has a certain deactivation rate, and the production cost is high, so we propose a mercury-free catalyst for the synthesis of renewable reaction vinyl chloride and its preparation method to overcome the above problems

Method used

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Examples

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Effect test

specific Embodiment 1

[0023] The preparation method of the mercury-free catalyst for the synthesis of renewable reaction vinyl chloride provided by the first embodiment of the present invention comprises the following steps:

[0024] (1) Add 1 mol / L copper salt into the hydrochloric acid solution, and stir evenly to obtain impregnation solution a;

[0025] (2) Add the Schiff base compound ligand solution to the impregnating liquid a obtained in (1), the impregnating time is 10h, maintain the impregnating temperature at a constant temperature of 50°C in the water bath, and then uniformly stir and mix it to obtain the impregnating liquid b;

[0026] (3) Immerse the impregnating liquid b obtained in (2) into the carrier. After the impregnation is completed, filter it, wash it with deionized water until it is neutral, and then dry it. Be nitrogen, finally obtain catalyst;

[0027] (4) After the prepared catalyst is deactivated, keep it at an oxygen volume space velocity of 400, stabilize at 200°C, ke...

specific Embodiment 2

[0029] The preparation method of the mercury-free catalyst for the synthesis of renewable reaction vinyl chloride provided by the second embodiment of the present invention comprises the following steps:

[0030] (1) Add 5 mol / L copper salt into the hydrochloric acid solution, and after stirring evenly, obtain the impregnation solution a;

[0031] (2) Add the Schiff base compound ligand solution to the impregnating liquid a obtained in (1), the impregnating time is 15 hours, maintain the impregnating temperature at a constant temperature of 55°C in a water bath, and then uniformly stir and mix it to obtain the impregnating liquid b;

[0032] (3) Immerse the impregnating liquid b obtained in (2) into the carrier. After the impregnation is completed, filter it, wash it with deionized water until it is neutral, and then dry it. Be nitrogen, finally obtain catalyst;

[0033] (4) After the prepared catalyst is deactivated, keep it at an oxygen volume space velocity of 400-1500, s...

specific Embodiment 3

[0035] The preparation method of the mercury-free catalyst for the synthesis of renewable reaction vinyl chloride provided by the third embodiment of the present invention comprises the following steps:

[0036] (1) Add 9mol / L copper salt into the hydrochloric acid solution, and after stirring evenly, obtain the impregnation solution a;

[0037] (2) Add the Schiff base compound ligand solution to the immersion solution a obtained in (1), the immersion time is 28 hours, maintain the immersion temperature at a constant temperature of 60°C in the water bath, and then uniformly stir and mix it to obtain the immersion solution b;

[0038] (3) Immerse the impregnating liquid b obtained in (2) into the carrier. After the impregnation is completed, filter it, wash it with deionized water until it is neutral, and then dry it. Be nitrogen, finally obtain catalyst;

[0039] (4) After the prepared catalyst is deactivated, it is kept at an oxygen volume space velocity of 1100, stabilized...

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Abstract

The invention discloses a mercury-free catalyst for synthesizing vinyl chloride through renewable reaction and a preparation method of the mercury-free catalyst. The preparation method comprises the steps that: copper salt is added into a hydrochloric acid solution, and after uniform stirring, an impregnation liquid a is obtained; a ligand solution is added into the obtained impregnation liquid a, impregnation is conducted for 10-48 h, the impregnation temperature is kept at the constant water bath temperature of 50-80 DEG C, the materials are evenly stirred and mixed, and an impregnation liquid b is obtained; a carrier is impregnated with the obtained impregnation liquid b, filtering is carried out after impregnation is completed, the carrier is cleaned with deionized water until the carrier is neutral, and then the carrier are dried and roasted to finally obtain the catalyst; and after the prepared catalyst is inactivated, the catalyst is kept at the oxygen volume space velocity of 400-1500, and high-temperature reduction regeneration is carried out in an oxygen-containing oxidation atmosphere. The catalyst prepared by the preparation method is environment-friendly and simple in process flow, the production cost of the mercury-free catalyst is effectively reduced, the manufacturing fund is saved, the inactivation and regeneration of the catalyst can be realized, and the catalyst is convenient to put into use.

Description

technical field [0001] The invention relates to the technical field of catalysts in organic synthesis, in particular to a mercury-free catalyst for the synthesis of renewable reaction vinyl chloride and a preparation method thereof. Background technique [0002] Polyvinyl chloride, referred to as PVC in English, is a polymer formed by the polymerization of vinyl chloride monomer (VCM) in peroxides, azo compounds and other initiators or under the action of light and heat according to the mechanism of free radical polymerization. . Polyvinyl chloride (PVC) has good physical, chemical and mechanical properties, and is widely used in fields such as agriculture, industry, construction and daily life, and is one of the top five thermoplastic synthetic resins in the world. Vinyl chloride homopolymers and vinyl chloride copolymers are collectively referred to as vinyl chloride resins. PVC is a white powder with an amorphous structure, with a small degree of branching, a glass tran...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J37/02B01J37/08B01J38/02B01J38/14C07C17/08C07C21/06
CPCB01J27/24B01J38/02B01J38/14B01J37/0203B01J37/0213B01J37/0209B01J37/084B01J37/088B01J37/082C07C17/08C07C21/06Y02P20/584
Inventor 吴云和曾诚
Owner XINHUANG XINZHONG CHEM
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