Catalyst for preparing vinyl chloride by acetylene hydrochlorination and preparation method thereof

A technology of acetylene hydrochlorination and catalyst, which is applied in the direction of physical/chemical process catalyst, molecular sieve catalyst, hydrogen halide addition preparation, etc. It can solve the problems of environment and its biological toxicity, pollution of downstream products, and affecting the quality of PVC products, etc.

Inactive Publication Date: 2014-07-16
XINJIANG ZHONGTAI CHEM CO LTD
View PDF3 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a catalyst for the preparation of vinyl chloride by acetylene hydrochlorination and a preparation method thereof, which overcomes the deficiencies in the prior art above, and can effectively Solve the problems that the existing HgCl 2 catalyst is easily deactivated, affects the quality of PVC products, and causes toxicity to the environment and its organisms

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1, the catalyst used for the preparation of vinyl chloride by acetylene hydrochlorination is obtained by the following preparation method: in the first step, an appropriate amount of granular catalyst carrier is taken; in the second step, the water absorption rate of the granular catalyst carrier is 1 to 3 times An equal volume of deionized water is taken, and the active component containing bismuth metal is weighed by 5% to 30% of the mass of the granular catalyst carrier, and the active component containing bismuth metal is added to the deionized water and mixed to obtain an impregnation solution; the third The first step is to add an inorganic acid equal to the molarity of metal bismuth in the impregnating solution and mix to obtain a mixed solution. Put the granular catalyst carrier in the mixed solution and soak for 12h to 24h. After the granular catalyst carrier is impregnated, it is dried to obtain Catalyst for the production of vinyl chloride.

Embodiment 2

[0020] Embodiment 2, the catalyst for the preparation of vinyl chloride by acetylene hydrochlorination is obtained by the following preparation method: the first step, take an appropriate amount of granular catalyst carrier; the second step, according to 1 times or 3 times the water absorption rate of the granular catalyst carrier Take deionized water in an equal volume, weigh the active component containing bismuth metal by 5% or 30% of the mass of the granular catalyst carrier, add the active component containing bismuth metal in the deionized water and mix to obtain the impregnation solution; the third The first step is to add an inorganic acid equal to the molarity of metal bismuth in the impregnating solution and mix to obtain a mixed solution. Put the granular catalyst carrier in the mixed solution and soak for 12h or 24h. After the granular catalyst carrier is impregnated, it is dried to obtain Catalyst for the production of vinyl chloride.

Embodiment 3

[0021] Embodiment 3, as the optimization of above-mentioned embodiment, granular catalyst carrier is granular SiO in embodiment 3 2 Or granular MCM-41 or granular HZSM-5.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
particle size (mesh)aaaaaaaaaa
Login to view more

Abstract

The invention relates to a catalyst for preparing vinyl chloride by acetylene hydrochlorination and a preparation method thereof, belonging to the technical fields of catalysts and preparation thereof. The preparation method comprises the following steps: 1. taking a right amount of granulated catalyst support; and 2. measuring deionized water which is 1-3 times of water absorptivity of the granulated catalyst support by volume, weighing a bismuth-containing active component which accounts for 5-30 wt% of the granulated catalyst support, adding the bismuth-containing active component into the deionized water, and evenly mixing to obtain an impregnation liquid. The catalyst provided by the invention is equivalent to the industrial HgCl2 catalyst in the prior art, has the same selectivity for vinyl chloride as the industrial HgCl2 catalyst in the prior art, can not influence the quality of the PVC (polyvinyl chloride) product, and can not damage the environment. The deactivated catalyst can be regenerated and reutilized.

Description

technical field [0001] The invention relates to the technical field of catalysts and their preparation, and relates to a catalyst used for acetylene hydrochlorination to prepare vinyl chloride and a preparation method thereof. Background technique [0002] Vinyl chloride (VCM) monomer is mainly used in the synthesis of polyvinyl chloride (PVC). Our country has more coal, less oil and less gas, comprehensive cost, process and other factors, the acetylene hydrochlorination method is still the main process of PVC production in my country for a long period of time. [0003] The acetylene hydrochlorination method currently used in my country is to use HgCl loaded on activated carbon in a fixed bed reactor. 2 Catalysts undergo gas-solid phase reactions. Due to the use of HgCl 2 / AC catalyst, HgCl 2 The sublimation of the catalyst will easily cause the deactivation of the catalyst in the reaction, and it will also pollute the downstream products and affect the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/10B01J27/25B01J27/053B01J27/186B01J29/78B01J29/48C07C21/06C07C17/08
CPCY02P20/584
Inventor 赵永禄高歌王雅玲殷杰
Owner XINJIANG ZHONGTAI CHEM CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap