Mercury-free catalyst with low bullion content for acetylene hydrochlorination and application thereof

Abstract

The invention discloses a mercury-free catalyst with low bullion content for acetylene hydrochlorination and application thereof and belongs to the technical field of a catalyst for the acetylene hydrochlorination and a preparation technique and a reaction process thereof. The catalyst comprises a noble metal element which accounts for 0.05 to 0.5 weight percent of the total weight of the catalyst, a common metal element which accounts for 0.1 to 5 weight percent of the total weight of the catalyst, and a carrier, wherein the noble metal element and the noble metal element exist in the form of metallic compounds. The noble metal element content of the catalyst is reduced greatly, the loading amount of a cocatalyst metallic element is also low, and the cost of the catalyst is reduced greatly; and the catalyst can replace the highly toxic mercury catalyst and is applied to the industrial production of the acetylene hydrochlorination.

Description

technical field [0001] The invention belongs to the technical field of catalysts for acetylene hydrochlorination and its preparation technology and reaction technology, and in particular relates to a low-precious-metal-content mercury-free catalyst for acetylene hydrochlorination and its application. Background technique [0002] Polyvinyl chloride is one of the most widely used plastics in the world due to its excellent physical properties and stable chemical properties. It is also the synthetic resin plastic with the largest output and consumption in my country. It is mainly used in building materials, electronic and electrical products, furniture, and medicine. and other fields. The monomer raw material of polyvinyl chloride is vinyl chloride monomer. Although most countries in the world currently use ethylene as the synthetic raw material for vinyl chloride monomer, due to the national conditions of more coal and less oil in my country and the technology of coal-to-acetyl...

AI Technical Summary

Problems solved by technology

Deng Guocai of Nankai University and others have studied the catalysts of common metal chlorides such as tin chloride as active components. Although they have high activity and good selectivity, the active components are lost rapidly and the catalyst deactivates quickly. Industrial application It is more difficult; the British scholar Hutings et al. have carried out a series of studies on noble metals such as Au, Pd, Pt and their combinations. They have proved that noble metals have a certain catalytic effect on acetylene hydrochlorination. Relatively speaking, Au as Catalysts have high catalytic activity for acetylene hydrochlorination, and deactivation is slow, but the catalysts prepared by them have a high proportion of noble metal loading and low catalyst activity, which makes the cost of industrial application high; South China University of Technology Wang Shengjie et al. proposed Au- Cu / C catalyst has good activity and stability, but its Au content is still relatively high, so it is difficult to apply to industrial production