CN1045193C - Production technique of cobaltous oxide - Google Patents
Production technique of cobaltous oxide Download PDFInfo
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- CN1045193C CN1045193C CN 96117017 CN96117017A CN1045193C CN 1045193 C CN1045193 C CN 1045193C CN 96117017 CN96117017 CN 96117017 CN 96117017 A CN96117017 A CN 96117017A CN 1045193 C CN1045193 C CN 1045193C
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- cobalt
- cobaltous oxide
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Abstract
The present invention relates to a cobaltous oxide production technology which orderly comprises the steps of acidolysis, purification and deferrization, dehydration, drying, calcination, etc. Cobaltous oxide produced by the technology is used as a catalyst of a rechargeable nickel-hydrogen battery. Compared with cobalt powder with the cobalt content of over 99 %, the present invention has the advantages of less raw material and production cost, good activity, strong catalytic power and increased nickelous hydroxide utilization ratio.
Description
The present invention relates to the production technique of cobaltous oxide, especially be used as the production technique of the cobaltous oxide of nickel metal hydride battery catalyzer.
At present, in the battery production, generally use the catalyzer of cobalt powder as the rechargeable type nickel metal hydride battery.Because the content higher (up to more than 99%) of cobalt in the cobalt powder, not only waste raw material, the production cost height, and because its poor activity causes the utilization ratio of nickel hydroxide very low.
The object of the present invention is to provide a kind of production technique of cobaltous oxide, with the cobaltous oxide that this technology is made, it is low, active good to contain the cobalt amount, and alternative cobalt powder is as the catalyzer of rechargeable type nickel metal hydride battery, can improve the utilization ratio of nickel hydroxide, reduce production costs greatly.
Technical solution of the present invention may further comprise the steps successively: earlier cobalt ingot (or cobalt button) is inserted in the reactive tank, add ionized water and nitric acid, and be heated to 50~100 ℃ slowly and make its reaction, acidolysis becomes cobalt nitrate solution; Afterwards, cobalt nitrate solution is pumped in the reactor, and be heated to 50~100 ℃, when evenly stirring, add neutralizing agent slowly, transfer its pH value to 3.5~5.4,, remove scum through press filtration.The cobalt nitrate solution that to remove scum again pumps in the reactor, and it is heated to 50~100 ℃, when evenly stirring, adds soda ash solution and makes the cobalt precipitation, obtains cobaltous carbonate.At last, through dehydration, oven dry, cobaltous oxide is made in roasting under 350~600 ℃ of temperature, in inert or the little reducing atmosphere.
The cobaltous oxide that adopts technology of the present invention to make, after tested, containing the cobalt amount only is 77~81.5%.As the catalyzer of rechargeable type nickel metal hydride battery, be that cobalt powder more than 99% is compared with containing the cobalt amount, not only economize in raw materials, also can reduce production costs greatly.On probation through Shenzhen BYD Industry Co., Ltd, can reduce cost more than 6%, and also active good, catalytic capability is strong, can make the utilization ratio of nickel hydroxide improve 2~4%.
Below by embodiment the present invention is described in further detail:
Earlier the cobalt ingot (or cobalt button) of 400kg is inserted in the reactive tank, add the ionized water of 500L and the nitric acid of 100L more successively, be heated to 90 ℃ slowly with steam, after treating its intense reaction, stop heating, allow it react voluntarily, become and contain the cobalt nitrate solution that the cobalt amount is 60~90g/L, pour out.Afterwards, cobalt nitrate solution is pumped in the reactor, and be heated to 90 ℃, when evenly stirring, add neutralizing agent slowly, make its pH value transfer to 4.5,, remove scum through press filtration.Neutralizing agent wherein is that concentration is 6% ammoniacal liquor.Again, add ionized water and dilute, make its cobalt contents reduce to 35~40g/L.Again the cobalt nitrate solution after the dilution is pumped in the reactor, and be heated to 83 ℃, when evenly stirring, add temperature slowly and be 60 ℃ soda ash solution, make its pH value transfer to 8.0, obtain cobaltous carbonate.At last, use centrifuge dewatering successively, be 100 ℃ baking oven baking and pulverizer pulverizing with temperature, and on two-tube reduction furnace, carry out roasting, make cobaltous oxide of the present invention under inert or the little reducing atmosphere, at 350~600 ℃.Wherein said inert or little reducing atmosphere are meant nitrogen or carbon monoxide, carbonic acid gas.
The concentration of the soda ash solution in the foregoing description is 10%.
Claims (2)
1, the production technique of cobaltous oxide is characterized in that may further comprise the steps successively:
Earlier cobalt is inserted in the reactive tank, the ratio that adds 125l ionized water and 25l nitric acid in every 100kg cobalt adds ionized water and nitric acid, and it is heated to 90 ℃, after treating its intense reaction, stop heating, it is reacted voluntarily, and acidolysis becomes to contain the cobalt nitrate solution that the cobalt amount is 60~90g/l, and wherein: the concentration of nitric acid is 98%;
Afterwards, cobalt liquor is pumped in the reactor, and be heated to 50~100 ℃, when evenly stirring, add neutralizing agent slowly, transfer its pH value to 3.5~5.4, remove scum through press filtration; Neutralizing agent wherein is that concentration is 6% ammoniacal liquor;
The cobalt nitrate solution that to remove scum again pumps in the reactor, and it is heated to 50~100 ℃, when evenly stirring, by cobalt nitrate solution: the equivalent ratio adding soda ash solution of soda ash solution=1: 1, cobalt is precipitated fully, obtain cobaltous carbonate;
At last, through dehydration, oven dry, again under 350~600 ℃ of temperature, roasting 30~60 minutes in inert atmosphere or the little reducing atmosphere, make cobaltous oxide.
2, production technique according to claim 1, the concentration that it is characterized in that said soda ash solution is 10%.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 96117017 CN1045193C (en) | 1996-07-11 | 1996-07-11 | Production technique of cobaltous oxide |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 96117017 CN1045193C (en) | 1996-07-11 | 1996-07-11 | Production technique of cobaltous oxide |
Publications (2)
Publication Number | Publication Date |
---|---|
CN1144773A CN1144773A (en) | 1997-03-12 |
CN1045193C true CN1045193C (en) | 1999-09-22 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CN 96117017 Expired - Fee Related CN1045193C (en) | 1996-07-11 | 1996-07-11 | Production technique of cobaltous oxide |
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CN (1) | CN1045193C (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100368305C (en) * | 2005-07-08 | 2008-02-13 | 中南大学 | Method for preparing nano cobaltous oxide |
CN100425538C (en) * | 2006-10-31 | 2008-10-15 | 山东师范大学 | Synthesis method of cobaltous oxide nano-tube |
CN101200309B (en) * | 2007-12-11 | 2010-06-09 | 周红阳 | Method for producing cobaltous oxide |
CN101244845B (en) * | 2008-03-07 | 2012-07-04 | 宁波雁门新能源有限公司 | Method for manufacturing cobalt protoxide used as secondary battery catalyst |
CN104624191A (en) * | 2013-11-11 | 2015-05-20 | 中国科学院大连化学物理研究所 | CoO/C catalyst and preparation method thereof |
CN105152230B (en) * | 2015-09-07 | 2017-01-18 | 无锡中经金属粉末有限公司 | Process and equipment of preparing high-power-type cobalt oxide |
CN105084429A (en) * | 2015-09-07 | 2015-11-25 | 无锡中经金属粉末有限公司 | Method for producing nanoscale cobalt (II) oxide |
CN106976917B (en) * | 2017-03-03 | 2018-06-01 | 陕西科技大学 | Sheet cobalt black-two-dimensional layer carbonization titanium composite material and its two-step preparation |
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1996
- 1996-07-11 CN CN 96117017 patent/CN1045193C/en not_active Expired - Fee Related
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Publication number | Publication date |
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CN1144773A (en) | 1997-03-12 |
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