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Catalyst used for vinyl chloride preparation, its preparation method and application

A catalyst, vinyl chloride technology, used in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of weak carrier bonding, coarse catalyst crystals, catalytic effect and catalytic stability. It is difficult to achieve industrial application And other issues

Active Publication Date: 2012-05-09
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in the simulated industrial operation, it was found that the crystals of the catalyst prepared by the ordinary soaking method were coarse, unevenly distributed, weakly combined with the carrier, and easy to fall off, and the catalytic effect and catalytic stability were difficult to meet the requirements of industrial applications.

Method used

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  • Catalyst used for vinyl chloride preparation, its preparation method and application
  • Catalyst used for vinyl chloride preparation, its preparation method and application

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preparation example Construction

[0027] The preparation method of the catalyst for preparing vinyl chloride provided by the invention comprises the following steps:

[0028] 1) The water-soluble compound of barium, the water-soluble compound of phosphorus and the water-based polymer monomer are mixed with water to prepare solution A or emulsion A;

[0029] In step 1), the water-soluble compound of barium can be selected from barium chloride, etc., and its aqueous solution concentration is 0.3-30% (preferably 1-20%); the water-soluble compound of phosphorus can be selected from phosphoric acid etc., the concentration of its aqueous solution is 0-10% (preferably 0.5-10%); the water-based polymer monomer can be a compound that can be polymerized into a water-based glue, and the compound that can be polymerized into a water-based glue can be selected from acrylic compounds , vinyl ester compound, acrylamide, urea and formaldehyde, phenol and formaldehyde, melamine and formaldehyde, waterborne polyurethane monomer...

Embodiment 1

[0046] Prepare sample 1

[0047] 1. Dissolve 5g of barium chloride, 2g of phosphoric acid and 3g of acrylic acid in 100g of water to make a solution.

[0048] 2. Add 50g of activated carbon into the above solution for soaking, preferably in a vacuum state, so that the solution can fully penetrate into the activated carbon. The soaking temperature is 40°C, and the soaking time is 1h.

[0049]3. Take out the soaked activated carbon and dry it with a centrifuge.

[0050] 4. The dried activated carbon is irradiated with ultraviolet rays to initiate the polymerization of acrylic acid.

[0051] 5. Heat the activated carbon loaded with water-based polymer under the protection of inert gas to dehydrate it and decompose and carbonize the polymer. The temperature is controlled at 400°C.

[0052] 6. Activate the carbonized activated carbon and its load with nitrogen, the activation temperature is 1000°C, and the activation time is 0.5h.

[0053] Sample 1 was prepared by the above ste...

Embodiment 2

[0055] Prepare sample 2

[0056] 1. 10g of barium chloride, 5g of phosphoric acid, 5g of vinyl acetate, 0.1g of sodium alkylbenzenesulfonate and 100g of water are prepared into an emulsion.

[0057] 2. Add 50g of activated carbon into the above emulsion for soaking, preferably in a vacuum state, so that the emulsion can fully penetrate into the activated carbon. The soaking temperature is 60°C, and the soaking time is 5 hours.

[0058] 3. Take out the soaked activated carbon and dry it with a centrifuge.

[0059] 4. Spray 5 g of a solution containing 1% ammonium persulfate and 1% sodium bisulfite onto activated carbon to polymerize vinyl acetate.

[0060] 5. Heat the activated carbon loaded with water-based polymer under the protection of inert gas to dehydrate it and decompose and carbonize the polymer. The temperature is controlled at 500°C.

[0061] 6. Activate the carbonized activated carbon and its load with carbon dioxide gas, the activation temperature is 800°C, and ...

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Abstract

The invention discloses a catalyst used for vinyl chloride preparation, its preparation method and application. The catalyst used for vinyl chloride preparation adopts activated carbon as a carrier, which is loaded with a barium compound and a phosphorus compound. By mass, the barium compound accounts for 0.2%-20% of the total mass of the catalyst, and the phosphorus compound accounts for 0%-10% of the total mass of the catalyst. The preparation method of the catalyst comprises: adding water into a water-soluble barium compound, a water-soluble phosphorus compound and an aqueous polymer monomer so as to prepare a solution or emulsion A; adding activated carbon into the solution or emulsion A for immersion; taking the well immersed activated carbon out and subjecting it to spin drying, then making monomer polymerization; heating the well polymerized activated carbon, dehydrating it, and decomposing and carbonizing the polymer; activating the carbonized catalyst, thus obtaining the catalyst used for vinyl chloride preparation.

Description

technical field [0001] The invention relates to a catalyst, in particular to a catalyst for producing vinyl chloride from acetylene dichloroethane and a preparation method thereof. Background technique [0002] Polyvinyl chloride is one of the five general-purpose plastics, widely used in industrial and agricultural production and daily life. [0003] At present, there are two main production methods of polyvinyl chloride: one is the acetylene method, that is, acetylene is used as a raw material to react with hydrogen chloride to synthesize vinyl chloride monomer under the action of mercuric chloride catalyst. Due to the use of mercuric chloride as a catalyst in this method, there is a problem of mercury pollution, and this process has been basically eliminated abroad. Another method is the ethylene method, which uses vinyl chloride to directly chlorinate and oxychloride to produce dichloroethane, and dichloroethane to produce vinyl chloride monomer by thermal cracking. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/18B01J23/02B01J37/00C07C21/06C07C17/08C07C17/25
Inventor 姜标钟劲光
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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