Catalyst for preparing vinylidene chloride by trichloroethane gas-phase catalytic cracking and preparation method thereof

A catalytic cracking, trichloroethane technology, applied in physical/chemical process catalysts, dehydrohalogenation preparation, chemical instruments and methods, etc., can solve problems such as unsatisfactory selectivity, achieve difficult surface area carbon deactivation, and prolong life. Effect
CN101816945AInactive Publication Date: 2010-09-01EAST CHINA UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
EAST CHINA UNIV OF SCI & TECH
Publication Date
2010-09-01
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a catalyst for preparing vinylidene chloride by trichloroethane gas-phase catalytic cracking and a preparation method thereof. The catalyst comprises a carrier and active ingredients loaded on the carrier, wherein, the active ingredients are more than one of cesium chloride, potassium chloride or rubidium chloride. The catalyst obtained by the method can be applied to preparing the vinylidene chloride by 1,1,2-trichloroethane or 1,1,1-trichloroethane gas-phase catalytic cracking, wherein, when the 1,1,2-trichloroethane is taken as a cracking reaction raw material, the conversion rate can reach up to over 23.8%, and the selectivity can reach up to over 87.7%; and when the 1,1,1-trichloroethane is taken as a cracking reaction raw material, the conversion rate can reach up to over 19.2%, and the selectivity can reach up to over 99.5%, thus meeting the industrialization need.
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Description

technical field

[0001] The invention relates to a method for preparing vinylidene chloride by gas-phase catalytic cracking of trichloroethane, in particular to a catalyst. Background technique

[0002] Vinylidene chloride (VDC) is a very important basic chemical raw material with a wide range of applications. Vinylidene chloride can be used to produce polyvinylidene chloride as well as various copolymers. Vinylidene chloride is also widely used in the production of Freon substitutes. In summary, vinylidene chloride has broad market application prospects, and it is of great significance to vigorously develop the production technology of vinylidene chloride.

[0003] The traditional production process of vinylidene chloride is the saponification method of trichloroethane. The production of vinylidene chloride by this method will produce a large amount of saline organic wastewater, which does not meet the requirements of environmental protection. 1,1,2-Trichloroethane gas-ph...

Claims

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