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Supported mercury-free catalyst, preparation method thereof and application of supported mercury-free catalyst in preparation of vinyl chloride through ethyne hydrochlorination

A mercury catalyst and a supported technology are applied in the field of supported mercury-free catalysts and their preparation to achieve the effects of reducing pollution and potential safety hazards and having good stability

Inactive Publication Date: 2017-02-22
XINJIANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The invention provides a supported mercury-free catalyst and its preparation method and its application in the preparation of vinyl chloride by hydrochlorination of acetylene, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problem that there is no related metal-organic framework porous material as a catalyst. Issues related to the application of catalyst supports in the hydrochlorination of acetylene

Method used

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  • Supported mercury-free catalyst, preparation method thereof and application of supported mercury-free catalyst in preparation of vinyl chloride through ethyne hydrochlorination

Examples

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Effect test

Embodiment 1

[0021] Embodiment 1, this load-type mercury-free catalyst obtains by following preparation method: the first step, the chloride of active component or the nitrate of active component or the sulfate of active component or the phosphate of active component are used After the solvent is dissolved, the precursor solution of the active component is obtained; in the second step, the metal-organic framework porous material is added to the precursor solution of the active component for impregnation according to the equal-volume impregnation method or the over-volume impregnation method, and after impregnation, it is dried, After calcining and tableting under the protection of nitrogen, a supported mercury-free catalyst is obtained. Metal-organic framework porous materials are currently known and public. Metal-organic framework porous materials include MOF-5, HKUST-1, UIO series, ZIF series, MIL series, IRMOF series and MOF-53, etc.; metal-organic framework porous materials can use solv...

Embodiment 2

[0022] Embodiment 2, as the optimization of above-mentioned embodiment, active component is Bi or Cu or Sn or Co or Au or Pd or Pt or Ru or Ir or wherein more than one; Or / and, active in the load-type mercury-free catalyst The mass percentage loading of the components is 0.5% to 30%.

Embodiment 3

[0023]Example 3, as an optimization of the above example, the solvent is deionized water or acetonitrile; or / and, the metal organic framework porous material and the precursor solution of the active component are mixed in a volume ratio of 1:1 to 1:3.

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Abstract

The invention relates to the technical field of catalysts, and provides a supported mercury-free catalyst, a preparation method thereof and an application of the supported mercury-free catalyst in preparation of vinyl chloride through ethyne hydrochlorination. The supported mercury-free catalyst is prepared through steps as follows: step one, preparing a precursor solution of active components; step two, supporting the active components on a metal-organic framework porous material with an isovolumetric or an over-volumetric impregnation method to obtain the green and environment-friendly supported mercury-free catalyst. The supported mercury-free catalyst is good in stability, and under the same technological condition, activity and selectivity of the supported mercury-free catalyst are higher or equal to those of a conventional industrial mercury catalyst; meanwhile, the application of the supported mercury-free catalyst prepared from the metal-organic framework porous material as a supporter in preparation of vinyl chloride through ethyne hydrochlorination is proposed for the first time, and vinyl chloride monomers can be prepared in a diversified and environment-friendly manner, so that the environmental pollution and the potential safety hazard caused by the industrial mercury catalyst are greatly reduced.

Description

technical field [0001] The invention relates to the technical field of catalysts, and relates to a supported mercury-free catalyst, a preparation method thereof and an application in the preparation of vinyl chloride by hydrochlorination of acetylene. Background technique [0002] Polyvinyl chloride (PVC) is one of the five general-purpose engineering plastics in the world. The synthesis technology of vinyl chloride monomer (VCM) is very critical. At present, there are three main methods for synthesizing VCM: acetylene method, ethane method, and ethylene method. Based on my country's current shortage of oil resources and relatively abundant coal resources, the acetylene method is mainly used to produce VCM, and it will still be the main production process of VCM in my country for a long period of time in the future. At present, the acetylene hydrochlorination reaction of VCM produced by the acetylene method is carried out in a fixed-bed reactor with activated carbon supporte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/26B01J31/28C07C17/08C07C21/06
CPCB01J31/26B01J31/28B01J2231/32B01J2531/16B01J2531/26B01J2531/31C07C17/08C07C21/06
Inventor 高歌闫磊
Owner XINJIANG UNIVERSITY
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