Production method of dearsenic agent

Abstract

A process for preparing the de-arsenic agent includes such steps as preparing the filtered wet C-Cu cake from the aqueous solution of sodium carbonate and the aqueous solution of copper sulfate, proportionally mixing it with zinc carbonate, alumina and water, press filtering to obtain filtered wet cake, drying, pulverizing, calcining, grinding, mixing it with CMC solution and sodium metaluminate, stirring, extruding out, and calcining in rotary furnace.

Description

technical field [0001] The invention relates to a production method of a chemical preparation, in particular to a production method of an arsenic-removing agent. Background technique [0002] The arsenic removal agent is a new type of purification agent widely used in the global petrochemical industry in recent years. This product is mainly used in the removal of arsine from propylene, ethylene and other materials to protect the subsequent polymerization catalysts and other deep processing catalysts, especially It is suitable for precise removal of arsenic in catalytic dry gas and ethylene enriched material of catalytic dry gas. With the continuous improvement of environmental protection requirements and standards in various countries in the world, the use of arsenic removal agents is expanding, but the traditional arsenic removal agents used in my country are far from meeting the requirements of international purification indicators. Although large-scale petrochemical plan...

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Problems solved by technology

[0004] 1. The arsenic removal rate of traditional arsenic removal agents is generally below 2%, especially at room temperature, it is less than 1%

[0005] 2. The arsenic content in the raw material gas as the object of arsenic removal is limited to less than 500ppb and the service life is short. For the raw material gas with high arsenic content, the arsenic removal effect of traditional arsenic removal agents will be greatly reduced

[0007] 4. Since the production of traditional arsenic removal agents uses a large amount of precious metal raw materials such as Ni and Cu, the manufacturing cost is very high, and the cost advantage in sales and exports is lost

[0008] 5. The specific gravity of the finished product of the traditional arsenic removal agent is generally above 1.1kg / L, resulting in an increase in the one-time filling cost of the product

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