Environment-friendly mercury-free catalyst for synthesizing vinyl chloride and preparation method thereof

Abstract

The invention discloses a mercury-free catalyst for synthesizing vinyl chloride and a preparation method thereof. The mercury-free catalyst comprises an active component, a first auxiliary agent, a second auxiliary agent and a carrier, the active component is a copper salt, the first auxiliary agent is a tin salt, and the second auxiliary agent is a platinum salt; the carrier is coal-based activated carbon; and according to the mass percentage, the active component accounts for 10%-30% of the mass of the catalyst, the first auxiliary agent accounts for 1%-10% of the mass of the catalyst, and the second auxiliary agent accounts for 0.01%-0.1% of the mass of the catalyst. According to the catalyst, metal copper is used as a main active component, tin and platinum are used as the auxiliary agents, the three components interact with each other, the activity of the catalyst can be effectively improved, the stability of the catalyst is improved, mercury pollution is reduced, the preparation mode is simple, and industrialization is easy to achieve.

Description

technical field [0001] The invention belongs to the field of catalysts, and in particular relates to a mercury-free catalyst used in the synthesis process of vinyl chloride and a preparation method thereof. Background technique [0002] Polyvinyl chloride (commonly known as PVC) is one of the top five general-purpose plastics in the world. Polyvinyl chloride is the only variety covering soft and hard applications, and its application range is very wide. Due to my country's unique resource structure of "rich coal, poor oil and little gas", the calcium carbide method accounts for more than 80% of the total production capacity of PVC in China, and has become the most important production method of PVC in China. [0003] However, the main catalyst used in the production of PVC by the calcium carbide method is still mercuric chloride catalyst, making it the industry with the largest amount of mercury in my country and an important source of mercury pollution to the environment. ...

AI Technical Summary

Problems solved by technology

Although the domestic industrial chain characteristics of the calcium carbide method process route itself, vigorously promote the development strategy of circular economy, comprehensively utilize the waste gas and waste residue emitted by the calcium carbide method production, and strive to reduce the environmental pollution caused by the calcium carbide method production, but the environmental pollution problem has been constrained Development and Growth of Calcium Calcium Calcium PVC Production Enterprises

At present, the research on the latest mercury-free catalysts is mostly limited to the research results obtained in the laboratories of major scientific research institutes, and has not yet achieved industrial application.

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