Catalyst for acetylene hydrochlorination reaction and preparation method thereof

Abstract

The invention discloses a catalyst for acetylene hydrochlorination reaction and a preparation method thereof. The catalyst comprises a carrier and a metal chloride active component loaded on the carrier, the carrier is silicon carbide, the specific surface area of the silicon carbide is not less than 20 m < 2 > / g; the metal chloride active component comprises noble metal chloride and common metal chloride; the noble metal chloride is selected from any one of AuCl3, RuCl3, PtCl4 or PdCl2; and the common metal chloride is selected from any one of SnCl4, CsCl, CuCl2 or CeCl3. The preparation method comprises the following steps: (1) dissolving the noble metal chloride to obtain a solution A; (2) adding the common metal chloride into the solution A to obtain a solution B; (3) adding a solvent into the solution B to obtain a solution C; (4) adding silicon carbide into the solution C, carrying out ultrasonic treatment, and removing a solvent to obtain a pre-product; and (4) drying the pre-product to obtain the catalyst for acetylene hydrochlorination reaction. The preparation method is simple, the prepared catalyst is used for preparing vinyl chloride through acetylene hydrochlorination, and the acetylene conversion rate is high.

Description

technical field [0001] The invention relates to the technical field of industrial catalysts, in particular to a catalyst for acetylene hydrochlorination and a preparation method thereof. Background technique [0002] Hydrochlorination of acetylene is an important method for preparing vinyl chloride monomer. At present, HgCl is mainly used in industry. 2 catalyst. HgCl 2 It is very easy to lose during the reaction process, which not only reduces the activity of the catalyst, but also causes serious environmental problems. Therefore, environmentally friendly mercury-free catalysts have attracted widespread attention (Qiao Xianliang et al., Chinese Science and Chemistry, 2019, 49: 1385-1400). Chinese patent (application number 201910112597.1) discloses an Au heteroatom complex catalyst for acetylene hydrochlorination, the carrier is activated carbon, and the active component is formed by central atom Au and ligands containing N, P or O heteroatoms Complexes. Chinese patent...

AI Technical Summary

Problems solved by technology

Chinese patent (Application No. 201310217096.2) discloses a silicon carbide-supported Pd-Au catalyst for the hydrogenation of nitrobenzene. The metal component in the catalyst exists in the form of a simple substance, which is not suitable for the acetylene hydrochlorination process.