Method for producing powdery composite mercury catalyst

Abstract

The invention discloses a method for producing powder composite mercury catalyst, which comprises the following steps: employing the nutshell powder active carbon as a carrier, impregnating the carrier in the HgCl mixed solution to obtain a wet catalyst which is then dried and sieved to produce the powder composite mercury catalyst containing 5-12.5% HgCl, 1-5% BaCl2, 1-5% NaCl and 2-4% rare earth chloride. HgCl content in the catalyst is relatively low, and thanks to that the manufacturers utilizing the powder mercury catalyst of the invention combine self corresponding processing techniques, the activity and stability of the catalyst are greatly improved to be 5%-12%, the dosage of the catalyst is reduced and service life prolonged and the changing time of the catalyst is saved, thus reducing the production cost of the vinyl chloride. Besides the small consumption and loss of the catalyst, the impregnated mixed solution can be continuously used after re-adjustment, re-preparation and purification, which will not pollute the environment. The production technology of the catalyst is characterized by short flow, low energy consumption, easy control of technology conditions and low production cost. In sum, the method has good economic benefit and environmental benefit.

Description

technical field [0001] The invention relates to a mercury catalyst method, in particular to a production method of a multi-component powder composite mercury catalyst used for the synthesis of vinyl chloride by addition reaction of hydrogen chloride and acetylene. Background technique [0002] In the existing technology, the catalysts used by domestic enterprises to synthesize vinyl chloride by addition reaction of hydrogen chloride and acetylene are mostly prepared by traditional process methods, that is, the impregnation method. This method is to prepare a solution of mercuric chloride into a certain concentration, and the carrier Activated carbon is impregnated in it to make mercuric chloride adsorbed in the carrier activated carbon; the carrier activated carbon used is a columnar activated carbon with a diameter of 3.5-4 mm and a length of 6-9 mm, and then dried with hot air at a temperature of 60-90 °C as a mercury chloride catalyst. Finally, the water content of the me...

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Problems solved by technology

[0003] The purpose of the present invention is in order to overcome above-mentioned shortcoming and deficiency of prior art, and provide a kind of process flow short, efficient high, the production method of the powdery composite mercury catalyst that does not have three wastes pollution, thereby avoided the large energy consumption of traditional technology The problem