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New technology of recycling ammonium bicarbonate during production of cobaltosic oxide

A technology of tricobalt tetroxide and ammonium bicarbonate, which is applied in the direction of cobalt oxide/cobalt hydroxide, products, chemical instruments and methods, etc., can solve the problem that ammonia nitrogen resources have not been used most economically and rationally, so as to improve labor efficiency and reduce production cost, emission reduction effect

Active Publication Date: 2014-11-19
GANZHOU TENGYUAN COBALT INDAL
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] 3. Ammonia nitrogen resources have not been utilized most economically and rationally;
[0017] 4. Need to dissolve solid ammonium bicarbonate process

Method used

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  • New technology of recycling ammonium bicarbonate during production of cobaltosic oxide

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Embodiment Construction

[0054] The present invention is described in detail with examples below.

[0055] 1. Synthesis of cobalt carbonate

[0056] 2CoCl 2 +5NH 4 HCO 3 = 2CoCO 3 ↓+4NH 4 Cl(L)+3CO 2 ↑+3H 2 O+NH 3 ↑ --------①

[0057] In the cobalt carbonate synthesis process, the reaction equation is unchanged from the old process, and the cobalt chloride solution and the technical indicators of the synthesis process control are also the same as the old process, but the source of ammonium bicarbonate is different. The ammonium bicarbonate in the old process comes from the purchased solid ammonium bicarbonate, which needs to be dissolved in water to meet the concentration required by the process index; the ammonium bicarbonate in the new process comes from the ammonium bicarbonate solution produced in the wastewater treatment process, and the concentration can be adjusted according to needs. There is no solid ammonium bicarbonate to dissolve this process.

[0058] 2. Cobalt carbonate calcin...

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Abstract

A new technology of recycling ammonium bicarbonate during production of cobaltosic oxide is characterized in that weak aqua ammonia generated by treating waste water containing ammonia nitrogen absorbs carbon dioxide generated when cobaltosic oxide is roasted by cobalt carbonate to synthesize an ammonium bicarbonate solution, and the ammonium bicarbonate solution is recycled in a synthesis process of cobalt carbonate. The technology can effectively realize resource recycling of ammonium bicarbonate, lowers the production cost, is energy-saving and environment-friendly, can effectively reduce the labor intensity of related workers, improves the labor efficiency and has better social and economic benefits.

Description

technical field [0001] The invention belongs to the resource comprehensive utilization technology in the field of chemical raw material preparation, and specifically relates to a new process for recycling ammonium bicarbonate in the production process of cobalt tetroxide in the production of cobalt tetroxide by using cobalt carbonate as a raw material. Background technique [0002] Cobalt tetroxide powder has a wide range of uses, including piezoresistors, gas sensor sensitive components, magnetic materials, supercapacitors, catalysts, optical materials, lithium-ion battery cathode materials, etc. [0003] There are many preparation methods of tricobalt tetroxide, among them, in the wet precipitation-solid phase pyrolysis method, the cobalt carbonate precursor is prepared by precipitating cobalt chloride solution with ammonium bicarbonate and then calcined to prepare tricobalt tetroxide production process, because this method has mild reaction conditions and simple process ,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/62C01G51/04
CPCY02P20/151
Inventor 谢福标蒋光勤吴阳红
Owner GANZHOU TENGYUAN COBALT INDAL