Metal-free catalyst for acetylene hydrochlorination reaction and preparation method and application thereof

Through the magnesium thermal reduction reaction, doping silicon oxide in the mixture of carbon dioxide and nitrogen gas, a composite carbon-based catalyst with porous carbon-nitrogen coated silicon oxide was prepared, which solved the problems of low activity and poor stability of metal-free catalysts, and achieved efficient acetylene hydrogen chlorination reaction and carbon emission reduction.

CN116510763BActive Publication Date: 2025-03-21鄂尔多斯市瀚博科技有限公司 +1
3 Cites 0 Cited by

Patent Information

Application Number
CN202310258221.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-03-17
Publication Date
2025-03-21
Estimated Expiration
2043-03-17

AI Technical Summary

Technical Problem

The existing metal-free catalysts have low activity and poor stability in the acetylene hydrochlorination reaction, and it is difficult for traditional nitrogen doping methods to achieve uniform distribution of nitrogen and high mechanical strength of the material.

Method used

The magnesium thermal reduction reaction is used to dopant silicon oxide in the mixture of carbon dioxide and nitrogen to prepare a composite carbon-based catalyst with porous carbon-nitrogen coated silicon oxide, and the high specific surface area and rich mesoporous structure of the catalyst are achieved by regulating the process conditions.

Benefits of technology

The catalytic activity and stability of the catalyst are significantly improved, and excellent acetylene conversion and vinyl chloride selectivity are shown in the acetylene hydrochlorination reaction, while achieving carbon emission reduction and high-value utilization of carbon dioxide.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The present invention provides a metal-free catalyst for acetylene hydrochlorination reaction, and a preparation method and application thereof, which belongs to the technical field of catalyst preparation. The catalyst is a composite carbon-based catalyst of porous carbon-nitrogen-coated silicon oxide. The preparation method of the catalyst is as follows: magnesium powder and silicon-containing oxide are fully mixed and placed in a tubular furnace, the tubular furnace is heated to a specified temperature under an inert gas, and then a mixture of carbon dioxide and nitrogen is introduced for reaction, and after a certain period of time, the inert gas is switched and the temperature is lowered to obtain a black powder; the black powder is soaked in an acidic solution, and then washed with deionized water to neutrality, and then dried to obtain the metal-free catalyst. The metal-free catalyst of the present invention has a high specific surface area, rich pore structure and strong mechanical strength, and uses carbon dioxide as a carbon source, thereby achieving carbon emission reduction and high-value utilization of carbon dioxide.
Need to check novelty before this filing date? Find Prior Art