Method for extracting cobalt-manganese metal compound from active sludge

A technology of activated sludge and compounds, which is applied in the field of manganese metal compounds and cobalt extraction, to achieve the effects of high recovery rate of cobalt and manganese, high product purity and low production cost

Inactive Publication Date: 2007-09-19
YIZHENG MAORUI CHEM
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  • Abstract
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Problems solved by technology

[0003] The purpose of this invention is to provide a kind of method that extracts cobalt, manganese metal compound from activated sludge, solves the pollution that a large amount of waste materials that discharge in the existing PTA production can't handle and pile up and its malodorous gas causes, realize resource recycling, have Conducive to environmental protection and improve economic efficiency

Method used

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Embodiment Construction

[0006] The present invention is further described in conjunction with the examples. The present invention uses advanced rotary kiln drying technology to dry and dehydrate the sludge at 300°C to remove 80% of the water in the sludge, so that the sludge is dried from the original colloidal state into particles with a water content of about 10%. . Sludge contains a large amount of organic matter. When the temperature reaches 500°C, the organic matter will spontaneously ignite, and the heat released by the spontaneous combustion can ignite the material. Basically, no coal is needed, which can save a lot of energy and reduce the treatment cost. Taking advantage of this feature, we have designed and built a suitable incinerator, which can dry and incinerate about 100 tons of sludge every day. In the ash after incineration, the content of cobalt and manganese is enriched from about 0.2% to about 10%, and then dissolved with acid, combined with the beating wastewater from which benzoi...

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Abstract

The present invention relates to a method of extracting metallic compound of cobalt and manganese from activated sludge, which belongs to the technique field of environmental protection comprehensive treatment and utilization. In the present invention, the activated sludge is subjected to drying, incinerating, acid-dissolution and relative adsorption, and extraction technology so as to obtain cobaltous sulfate and manganess sulfate. The rate of recovery of cobalt and manganese is more than 90%; the cost is low, the processing cost of metallic cobalt is only 50 thousand yuan per tone; the purity is high, the purity of cobaltous sulfate and manganese sulfate can meet the relative standard. The present invention has obvious economic benefits and social benefits, which can not only solve the sludge pollution caused by chemical fiber industry, but also obtain economic interest during the harnesing of sludge pollution.

Description

technical field [0001] The invention relates to a method for extracting cobalt and manganese metal compounds from activated sludge, and belongs to the technical field of environmental protection comprehensive treatment and utilization. Background technique [0002] With the development of my country's chemical fiber industry, the annual production capacity of my country's existing PTA devices has reached more than 8 million tons. The treatment of chemical production wastewater and sludge has always been a difficult problem in environmental protection. In the PTA production process, the wastewater produced contains a large amount of In addition to organic compounds such as benzoic acid, terephthalic acid, and isophthalic acid, it also contains inorganic compounds such as cobalt and manganese salts. Among them, cobalt acetate and manganese acetate are catalysts in the production of terephthalic acid. After the catalyst is used for a period of time, its catalytic activity weaken...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/10C01G45/10C02F11/00C02F11/12C02F11/06
CPCY02W10/40
Inventor 李锋铎丁明生陈长征
Owner YIZHENG MAORUI CHEM
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