Gas distributor in chloroethylene synthesis fluidized bed and chloroethylene synthetic method

A technology of gas distributor and synthesis method, which is applied in the fields of chemical instruments and methods, organic chemistry, hydrogen halide addition preparation, etc., can solve problems such as inflexibility, difficulty in effective evacuation, difficulty in dealing with sudden accidents, etc., and achieve Flexible control, extended continuous operation cycle, and stable effect

Inactive Publication Date: 2008-12-24
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the operation process finds that because these inventions all adopt a gas distributor at the bottom of the fluidized bed, if the gas temperature is too low, it is unfavorable for reaction; The above reaction is exothermic violently), this state is for large-scale operation, and flexibility is not strong, is difficult to deal with sudden accident, still exists under extreme conditions, such as all power outages of the factory, the heat of reaction of the residual material in the reactor is not easy Possibility of Effective Withdrawal

Method used

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  • Gas distributor in chloroethylene synthesis fluidized bed and chloroethylene synthetic method
  • Gas distributor in chloroethylene synthesis fluidized bed and chloroethylene synthetic method
  • Gas distributor in chloroethylene synthesis fluidized bed and chloroethylene synthetic method

Examples

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Effect test

Embodiment 1

[0040] figure 1 It is a schematic diagram of a fluidized bed in the form of a plate distributor and a set of gas (liquid) nozzles. A plate gas distributor 2a is arranged at the bottom of the fluidized bed F, and eight gas (liquid) nozzles 2b are arranged above it to connect with the tube wall of the fluidized bed F; a gas inlet 1a and a catalyst are arranged on the tube wall at the bottom of the fluidized bed F Outlet 3, a catalyst inlet 6 is set on the upper tube wall of the fluidized bed; a heat exchange tube 4, a component 5 and a cyclone separator 7 are set in the fluidized bed F; a gas outlet 8 is set on the tube wall at the top of the fluidized bed F and Connected with cyclone separator 7.

[0041] The active components of the catalyst are 10wt% mercuric chloride, 2wt% tin chloride and 0.1wt% lanthanum chloride, and the rest is carrier activated carbon. The catalyst is made by ball milling method, with a particle size of 0.1mm and a specific surface area of ​​600m 2 / g...

Embodiment 2

[0047] figure 2 A schematic diagram of a fluidized bed in the form of a plate distributor and a tube distributor. A plate gas distributor 2a is arranged at the bottom of the fluidized bed F, and a tube distributor 2b is arranged above it to be connected with the tube wall of the fluidized bed F; a gas inlet 1a and a catalyst outlet 3 are arranged on the tube wall at the bottom of the fluidized bed F, and A catalyst inlet 6 is set on the upper tube wall of the fluidized bed; a heat exchange tube 4, a member 5 and a cyclone separator 7 are set in the fluidized bed F; a gas outlet 8 is set on the tube wall at the top of the fluidized bed F and connected with the cyclone separator 7 connected.

[0048] The active components of the catalyst are 8wt% mercuric chloride, 5wt% zinc chloride and 0.1wt% barium chloride, and the rest is carrier activated carbon. The catalyst is made by ball milling method, with a particle size of 0.05mm and a specific surface area of ​​1000m 2 / g, the ...

Embodiment 3

[0054] image 3 It is a schematic diagram of a fluidized bed in the form of a tube distributor and a set of gas (liquid) nozzles. A tubular gas distributor 2a is arranged at the bottom of the fluidized bed F, and 20 gas (liquid) nozzles 2b are arranged above it to be connected with the tube wall of the fluidized bed F; a gas inlet 1a and a gas inlet 1a are arranged on the tube wall at the bottom of the fluidized bed F Catalyst outlet 3, catalyst inlet 6 is set on the upper tube wall of the fluidized bed; heat exchange tube 4, component 5 and cyclone separator 7 are set in the fluidized bed F; gas outlet 8 is set on the tube wall at the top of the fluidized bed F And be connected with cyclone separator 7.

[0055] The active components of the catalyst are 14wt% mercuric chloride and 0.1wt% manganese chloride, and the rest is the carrier silica-alumina molecular sieve. The catalyst is made by ball milling method, the particle size is 0.3mm, and the specific surface area is 200m...

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Abstract

The invention particularly relates to a gas distributor of the vinyl chloride synthesis fluidized bed and a synthesis method of vinyl chloride belonging to the field of chemical equipment and technology. Double distributors or one distributor and one group of gas(liquid) nozzles are arranged on the bottom of the fluidized bed. The invention also discloses a method for preparing vinyl chloride by reacting hydrogen chloride with acetylene in a fluidized bed reactor containing the distributor, which comprises controlling the feed temperature, the ratio of composition and flow of the double distributors or one distributor and a group of gas(liquid) nozzles, adjusting the temperature of the gas distributor area by of the cold shock principle of the low temperature gas(liquid). The method of the invention has advantages that the temperature control is sensitive and convenient, the highest and average temperature of the gas distributor area are reduced, the active component loss on the catalyst is inhibited and the coke on the catalyst is reduced, thereby prolonging the catalyst service life, improving the purity of the vinyl chloride product and simplifying the product exhaust post treatment with a low cost.

Description

technical field [0001] The invention belongs to the field of chemical material preparation technology and manufacturing equipment, and in particular relates to a gas distributor in a vinyl chloride synthesis fluidized bed and a vinyl chloride synthesis method. Background technique [0002] Vinyl chloride is a monomer for preparing polyvinyl chloride, and it is a very important chemical intermediate. With the wide application of polyvinyl chloride materials in packaging materials and other fields, the output of vinyl chloride and polyvinyl chloride has increased rapidly, and the annual demand in China is about 8 to 10 million tons. [0003] At present, there are three methods for industrial production of vinyl chloride, that is, to prepare vinyl chloride by reacting acetylene, ethylene or ethane with hydrogen chloride respectively. The source of ethylene is mainly the oil refining industry. Due to the rapid rise in crude oil prices in recent years, the price of ethylene has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C21/06C07C17/08B01J8/18
Inventor 骞伟中魏飞罗国华金涌汪展文
Owner TSINGHUA UNIV
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