CN102963937B - A kind of refining method of by-product Manganse Dioxide - Google Patents

A kind of refining method of by-product Manganse Dioxide Download PDF

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Publication number
CN102963937B
CN102963937B CN201210426958.8A CN201210426958A CN102963937B CN 102963937 B CN102963937 B CN 102963937B CN 201210426958 A CN201210426958 A CN 201210426958A CN 102963937 B CN102963937 B CN 102963937B
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China
Prior art keywords
mno
manganse dioxide
product
refining method
crude product
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Expired - Fee Related
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CN201210426958.8A
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Chinese (zh)
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CN102963937A (en
Inventor
张红英
周大明
王明祥
张后云
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TONGLING CITY XIANGYING ZINC INDUSTRY Co Ltd
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TONGLING CITY XIANGYING ZINC INDUSTRY Co Ltd
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Abstract

The invention discloses a kind of refining method of by-product Manganse Dioxide, concrete steps are as follows: first use 15-20% dilute sulphuric acid process crude product MnO 2, then add strong oxidizer ammonium persulphate oxide treatment aforesaid liquid, be heated to 45-50 DEG C, stir 20-30min, filter, wash, dry and obtain product purification Manganse Dioxide.The present invention effectively can utilize the MnO in production 2?waste material, by dissolve and its transformation of crystal is urged in the measure such as oxidation, increase that it is active, do utilization of waste material, turn waste into wealth, there is not secondary pollution, both added benefit, purified again environment.

Description

A kind of refining method of by-product Manganse Dioxide
Technical field
The present invention relates to a kind of refining method of by-product Manganse Dioxide, belong to chemical technology field.
Background technology
The zinc subcarbonate demanganization stage can produce a large amount of Manganse Dioxide by-product, and Manganse Dioxide is a kind of well novel battery positive electrode material.In order to carry out utilization of waste material, my company develops Manganse Dioxide refining method.
Summary of the invention
The object of the invention is to the Manganse Dioxide by-product making full use of the generation of zinc subcarbonate demanganization, provide a kind of refining method of by-product Manganse Dioxide, for cell positive material.
The technical solution used in the present invention is as follows:
A refining method for by-product Manganse Dioxide, comprises the following steps:
(1) with 15-20% dilute sulphuric acid process crude product MnO 2, be wherein mingled in MnO 2mnCO 3or the solubilized such as MnO generates MnSO 4, crude product MnO simultaneously 2in a small amount of α, beta crystal to γ type transition, thus improve MnO 2activity and purity;
(2) oxide treatment aforesaid liquid, processed in the liquid containing Manganse Dioxide to step (1) and added 2-3% strong oxidizer ammonium persulphate, be heated to 45-50 DEG C, stirred 20-30min, the Mn in solution 2+change into MnO 2;
(3) solution step (2) processed filters, wash, dry and obtain product purification Manganse Dioxide.
Described dilute sulphuric acid and crude product MnO 2mol ratio be 1:3-4.
Aforesaid method reaction equation is as follows:
MnCO 3+H 2SO 4----→MnSO 4+H 2O+CO 2↑
MnO+H 2SO 4----→MnSO 4+H 2O
Mn 2O 3+H 2SO 4----→MnSO 4+MnO 2+H 2O
Mn 3O 4+H 2SO 4-----→MnO 2+MnSO 4+H 2O
MnSO 4+(NH 4) 2S 2O 8+H 2O-----→MnO 2+H 2SO 4+(NH 4) 2SH 4
Beneficial effect of the present invention:
The present invention effectively can utilize the MnO in production 2waste material, by dissolve and its transformation of crystal is urged in the measure such as oxidation, increase that it is active, do utilization of waste material, turn waste into wealth, there is not secondary pollution, both added benefit, purified again environment.
Embodiment
Embodiment
A refining method for by-product Manganse Dioxide, comprises the following steps:
(1) with 20% dilute sulphuric acid process crude product MnO 2, be wherein mingled in MnO 2mnCO 3or the solubilized such as MnO generates MnSO 4, crude product MnO simultaneously 2in a small amount of α, beta crystal to γ type transition, thus improve MnO 2activity and purity;
(2) oxide treatment aforesaid liquid, processed in the liquid containing Manganse Dioxide to step (1) and added 2% strong oxidizer ammonium persulphate, be heated to 50 DEG C, stirred 30min, the Mn in solution 2+change into MnO 2;
(3) solution step (2) processed filters, wash, dry and obtain product purification Manganse Dioxide.
Wherein, described dilute sulphuric acid and crude product MnO 2mol ratio be 1:4.
After testing, the Manganse Dioxide content after refining is 99.95%, meets national standard.

Claims (2)

1. a refining method for by-product Manganse Dioxide, is characterized in that comprising the following steps:
(1) with 15-20% dilute sulphuric acid process crude product MnO 2, be wherein mingled in MnO 2mnCO 3or MnO solubilized generates MnSO 4, crude product MnO simultaneously 2in a small amount of α, beta crystal to γ type transition, thus improve MnO 2activity and purity;
(2) oxide treatment aforesaid liquid, processed in the liquid containing Manganse Dioxide to step (1) and added 2-3% strong oxidizer ammonium persulphate, be heated to 45-50 DEG C, stirred 20-30min, the Mn in solution 2+change into MnO 2;
(3) solution step (2) processed filters, wash, dry and obtain product purification Manganse Dioxide.
2. the refining method of by-product Manganse Dioxide according to claim 1, is characterized in that, described dilute sulphuric acid and crude product MnO 2mol ratio be 1:3-4.
CN201210426958.8A 2012-10-31 2012-10-31 A kind of refining method of by-product Manganse Dioxide Expired - Fee Related CN102963937B (en)

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CN102963937B true CN102963937B (en) 2015-12-09

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105914380B (en) * 2016-04-15 2018-07-27 广东工业大学 A kind of metal-air battery oxygen electrode active material and its preparation method and application
CN114275819B (en) * 2021-12-16 2024-03-01 湖南化工研究院有限公司 Efficient recovery method of active manganese dioxide
CN114974910B (en) * 2022-06-06 2024-03-22 安徽信息工程学院 Electrode material and preparation method thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102040248A (en) * 2010-12-01 2011-05-04 湖南汇通科技有限责任公司 Preparation method of active manganese dioxide

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Publication number Priority date Publication date Assignee Title
JPH07289906A (en) * 1994-04-25 1995-11-07 Daicel Chem Ind Ltd Activation and oxidation of manganese dioxide

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102040248A (en) * 2010-12-01 2011-05-04 湖南汇通科技有限责任公司 Preparation method of active manganese dioxide

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
天然轻质二氧化锰直接活化制备活性二氧化锰;袁明亮等;《矿产保护与利用》;20000831(第4期);第46-48页 *
湿法制取活性氧化锌与化学二氧化锰新工艺研究（上）;唐华雄等;《中国锰业》;19931231;第11卷(第6期);第26-30页 *
湿法制取活性氧化锌与化学二氧化锰新工艺研究（下）;唐华雄等;《中国锰业》;19941231;第12卷(第1期);第38-41页 *

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