Preparation method of coal-based vinyl acetate carrier carbon

Abstract

The invention provides a coal-based vinyl acetate carrier carbon and a preparation method. The raw material for preparing coal-based vinyl acetate carrier carbon includes the following parts by weight: anthracite 100, water 5-10, coal tar 30-40, coal tar pitch 4-10; anthracite is anthracite coal powder after grinding, and its particle size is D90<75μm, ash content<3.5wt%, volatile matter<9wt%; in coal tar, ash content<0.5wt%, asphalt content is 50-60wt%; in coal tar pitch, ash content<1wt%, softening temperature is 95-120℃ . The preparation method comprises the following steps: kneading and pressing strips, carbonization, primary activation, secondary activation, washing and drying. The coal-based vinyl acetate carrier carbon has high strength and high adsorption capacity for zinc acetate; the preparation method can improve activation yield and 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 from calcium carbide, zinc acetate is supported on solid carrier 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 types of supported metal catalysts can be prepared by using activated carbon (AC) as a carrier, and a variety of catalyst carrier carbons can be prepared. In recent years Applications in the field of catalysis are on the rise. However, the catalyst carrier carbon needs to have the characteristics of low ash, ...

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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