Method for preparing vinyl chloride by reaction between acetylene and dichloroethane

A technology of ethylene dichloride and vinyl chloride, applied in the field of vinyl chloride preparation, can solve the problems of low energy utilization rate, low catalyst activity, insufficient satisfaction, etc., and achieves a significant improvement in industrial application value, excellent catalytic performance, and a solution to the problem. The effect of environmental pressure

Pending Publication Date: 2020-07-28
SHANGHAI INST OF ORGANIC CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, the current nitrogen-doped catalysts are all based on activated carbon as a carrier, which is obtained by impregnating the activated carbon carrier in a nitrogen-containing impregnating solution, and then calcining at a high temperature. Activated carbon is a black porous solid carbon. Forming or using uniform coal particles through carbonization and activation production, so it can be classified as a nitrogen-doped coal-based catalyst. It is inevitable that a large amount of non-renewable coal will be used in the preparation process, resulting in waste of resources. Low, not enough to meet the needs of actual production
[0008] Bio-based is a sustainable renewable resource with low price. my country is rich in biomass resources, but the energy utilization rate is low

Method used

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  • Method for preparing vinyl chloride by reaction between acetylene and dichloroethane
  • Method for preparing vinyl chloride by reaction between acetylene and dichloroethane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Example 1: Preparation of biomass-based nitrogen-doped carbon catalyst

Embodiment 11

[0041] 1) Wash, dry, and crush the bamboo processing waste to 20 mesh, and set aside;

[0042] 2) Mix 10g of bamboo powder, 10g of acrylamide and 10g of zinc chloride, add an equal volume of water and stir evenly, vacuum impregnate for 10 hours, then concentrate the impregnation system under reduced pressure, and dry the concentrate at 120°C to obtain impregnated modified sex;

[0043] 3) Carbonize the impregnated modified product at 1000°C for 2 hours in a nitrogen gas atmosphere, cool to room temperature, and wash the cooled carbonized product with 10% dilute hydrochloric acid (to remove excess zinc chloride, wash into the carbonized product Zinc ion concentration is lower than 100ppm), washed with deionized water until neutral, and then dried at 120°C to obtain the biomass-based nitrogen-doped carbon catalyst, abbreviated as C-1.

Embodiment 12

[0045] 1) Wash, dry, and crush the wood processing waste to 20 meshes, and set aside;

[0046] 2) Mix 10g of wood powder, 5g of urea and 15g of zinc chloride, add an equal volume of water and stir evenly, vacuum impregnate for 10 hours, then concentrate the impregnation system under reduced pressure, and dry the concentrate at 120°C to obtain impregnation modification thing;

[0047] 3) Carbonize the impregnated modified product at 800°C for 4 hours in a nitrogen gas atmosphere, cool to room temperature, and wash the cooled carbonized product with 10% dilute hydrochloric acid (to remove excess zinc chloride, wash into the carbonized product The concentration of zinc ions is lower than 100ppm), washed with deionized water until neutral, and then dried at 120° C. to obtain the biomass-based nitrogen-doped carbon catalyst, abbreviated as C-2.

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Abstract

The invention discloses a method for preparing vinyl chloride by a reaction between acetylene and dichloroethane, comprisingthe following steps of: reacting between acetylene and dichloroethane to prepare vinyl chloride under the action of a biomass-based nitrogen-doped carbon catalyst, wherein the biomass-based nitrogen-doped carbon catalyst is prepared by carbonizing biomass or a mixture of biomass and a nitrogen source at 400-1000 DEG C, and the biomass is selected from at least one of bamboo processing leftovers, wood processing leftovers, plant straws, plant leaves, cereals, beans, cerealprocessing leftovers, bean processing leftovers and livestock manure. The method disclosed by the invention has the advantages of simple preparation process, easily available raw materials, low cost,strong process controllability, easiness in large-scale production, energy conservation, environmental protection and the like.

Description

technical field [0001] The invention relates to a method for preparing vinyl chloride, in particular to a method for preparing vinyl chloride by reacting acetylene and ethylene dichloride, and belongs to the technical field of vinyl chloride preparation. Background technique [0002] Vinyl chloride is a very important chemical raw material, mainly used in the production of polyvinyl chloride resin (PVC). PVC is one of the world's top five engineering plastics and is widely used in industrial and agricultural production. As of 2016, the world's PVC production has reached 40 million tons. my country is the world's largest PVC producer, with an output of 25 million tons. The market demand is still growing at a rate of 5% every year. Therefore, the development of vinyl chloride has always been concerned by people. important topic. [0003] The preparation methods of vinyl chloride mainly include acetylene hydrochlorination and ethylene oxychlorination. The acetylene hydrochlori...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C17/08C07C17/25C07C21/06B01J27/24
CPCB01J27/24C07C17/08C07C17/25C07C21/06
Inventor 姜标沈兆兵刘悦邢萍
Owner SHANGHAI INST OF ORGANIC CHEM CHINESE ACAD OF SCI
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