Preparation method for coal-based vinyl acetate carrier carbon

Abstract

The invention provides coal-based vinyl acetate carrier carbon and a preparation method. The raw materials of coal-based vinyl acetate carrier carbon comprise the following substances in parts by weight: 100 parts of anthracite, 5-10 parts of water, 30-40 parts of coal tar and 4-10 parts of coal tar pitch, wherein the anthracite is pulverized anthracite powder with particle size D90 being smallerthan 75 mu m, and contains less than 3.5wt% of ash and less than 9wt% of volatiles; the coal tar comprises less than 0.5wt% of ash and less than 50wt%-60wt% of pitch; the coal tar pitch comprises lessthan 1wt% of ash and has softening temperature being 95-120 DEG C. The preparation method comprises the following steps: kneading layering, carbonizing, primary activation, secondary activation, washing and drying. Coal-based vinyl acetate carrier carbon has high strength and high adsorption capacity to zinc acetate; the preparation method can increase activation yield and improve product performance.

Description

technical field [0001] The invention belongs to the field of material preparation, in particular to a preparation method of coal-based vinyl acetate carrier carbon. Background technique [0002] The synthesis of vinyl acetate in my country is mainly based on the acetylene method. In this method, acetylene is prepared by calcium carbide, zinc acetate is supported on solid support carbon, and acetylene and acetic acid are catalyzed by zinc acetate to generate vinyl acetate. Activated carbon has the characteristics of high specific surface area, special electronic properties, adjustable surface functional groups, and can accommodate active metals and additives. Various supported metal catalysts can be prepared by using activated carbon (AC) as a carrier, and a variety of catalyst-supported carbons can be prepared. The application in the field of catalysis shows a growing trend. However, catalyst-supported carbon needs to have the characteristics of low ash, high specific surf...

AI Technical Summary

Problems solved by technology

At present, coconut shells, fruit shells, wood chips, etc. are generally used as raw materials to produce solid carrier carbon in industry. The process is mature, but the cost is high and the catalyst consumption is large.

However, ordinary coal-based activated carbon cannot meet the aforementioned requirements for catalyst carrier carbon, and because coal-based activated carbon is difficult to activate compared with wood-based activated carbon, the prepared carbon has low wear resistance and acetic acid adsorption, and the loss during use is relatively large.

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