CN104250023A - Method for removing impurities from nickel sulfate - Google Patents
Method for removing impurities from nickel sulfate Download PDFInfo
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- CN104250023A CN104250023A CN201410079340.8A CN201410079340A CN104250023A CN 104250023 A CN104250023 A CN 104250023A CN 201410079340 A CN201410079340 A CN 201410079340A CN 104250023 A CN104250023 A CN 104250023A
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- nickel salt
- single nickel
- described step
- salt according
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Abstract
The invention relates to a method for removing impurities from nickel sulfate. The method includes: mixing nickel sulfate with water to obtain a nickel sulfate solution, then adding ammonium fluoride under stirring, and then after a period of time, conducting filtration treatment, standing, cooling, crystallization and spin-drying to obtain a finished product. According to the invention, ammonium fluoride is employed to react with the impurities calcium and magnesium in nickel sulfate so as to obtain calcium fluoride and magnesium fluoride precipitates in the solution, and the precipitates are removed by filtration, and then the pH value of the solution are adjusted to remove ammonium ions.
Description
Technical field
The present invention relates to a kind of single nickel salt and go deimpurity method, particularly relate to a kind of method that the metal such as calcium, magnesium removed by single nickel salt
Background technology
Single nickel salt is mainly used in electroplating industry, can for the production of nickel-cadmium cell, higher for the single nickel salt purity requirement in battery, very strict to the content requirement of the impurity such as calcium, magnesium, therefore must refine single nickel salt.The method now commercially adopted is inorganic salt chemical precipitation method and extraction process mainly, although inorganic salt chemical precipitation method removes the effective ways of calcium, magnesium, this method often brings new foreign ion into; Although adopt extraction process can remove clean by calcium magnesium, there is very large problem when back extraction, this solubleness mainly due to calcium sulfate is low.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of single nickel salt to go deimpurity method, and the method can easily solve calcium, magnesium addition in single nickel salt.
In order to solve the problem, technical scheme of the present invention is that a kind of single nickel salt goes deimpurity method, and its step is as follows:
1) add water in a kettle., add single nickel salt mix and blend subsequently and form nickel sulfate solution, the proportion adding water and single nickel salt is 1:2.3;
2) in nickel sulfate solution, add ammonium fluoride, in adition process, adopt limit edged alr mode;
3), after for some time, mixed solution is left standstill cooling, then mixed solution is filtered;
4) the solution oven dry after filtration, cooling, crystallization, drying are obtained finished product;
Further, described step 2) in the proportion of ammonium fluoride and single nickel salt be 1:75 ~ 80.
Further, described step 2) in temperature of reaction should reach 80 DEG C ~ 90 DEG C.
Further, described step 2) in reaction times be 1t ~ 1.5t.
Further, affiliated step 2) in pH value be 5.5 ~ 6.
Further, leaving standstill cooling time in described step 3) is 3t ~ 5t.
Further, treatment step of being milled by finished product in addition after described step 4), obtains pulverous single nickel salt finished product.
Compared with prior art, the present invention adopts impurity calcium in Neutral ammonium fluoride and single nickel salt, reactive magnesium obtains Calcium Fluoride (Fluorspan) and magnesium fluoride is deposited in solution, adopts the method for filtering to remove throw out, removes ammonium radical ion in the pH value of regulator solution.
Embodiment
A kind of single nickel salt goes deimpurity method, and step is as follows:
1) add water in a kettle., add single nickel salt mix and blend subsequently and form nickel sulfate solution, the proportion adding water and single nickel salt is 1:2.3;
2) in nickel sulfate solution, add ammonium fluoride, in adition process, adopt limit edged alr mode, the ammonium fluoride added and the proportion of single nickel salt are 1:75, and temperature of reaction is 85 DEG C, and the solution ph in reaction process is 5.5, and the reaction times is 1.5t.
3) after for some time, mixed solution is left standstill cooling, then filtered by mixed solution, the time left standstill is 4t.
4) the solution oven dry after filtration, cooling, crystallization, drying are obtained finished product;
5) milled processed is carried out to finished product, obtain single nickel salt finished product.
Above one embodiment of the present of invention have been described in detail, but described content being only the preferred embodiment of the invention, the practical range for limiting the invention can not being considered to.All equalizations done according to the invention application range change and improve, and still all should belong to patent covering scope of the present invention.
Claims (8)
1. single nickel salt goes a deimpurity method, it is characterized in that: its step is as follows:
1) add water in a kettle., add single nickel salt mix and blend subsequently and form nickel sulfate solution;
2) in nickel sulfate solution, add ammonium fluoride, in adition process, adopt limit edged alr mode;
3), after for some time, mixed solution is left standstill cooling, then mixed solution is filtered;
4) the solution oven dry after filtration, cooling, crystallization, drying are obtained finished product.
2. single nickel salt according to claim 1 goes deimpurity method, it is characterized in that: the water in described step 1) in reactor and the proportion of single nickel salt are 1:2 ~ 2.5.
3. single nickel salt according to claim 2 goes deimpurity method, it is characterized in that: described step 2) in the proportion of ammonium fluoride and single nickel salt be 1:75 ~ 80.
4. single nickel salt according to claim 3 goes deimpurity method, it is characterized in that: described step 2) in temperature of reaction should reach 80 DEG C ~ 90 DEG C.
5. single nickel salt according to claim 4 goes deimpurity method, it is characterized in that: described step 2) in reaction times be 1t ~ 1.5t.
6. single nickel salt according to claim 5 goes deimpurity method, it is characterized in that: affiliated step 2) in pH value be 5.5 ~ 6.
7. single nickel salt according to claim 6 goes deimpurity method, it is characterized in that: leaving standstill cooling time in described step 3) is 3t ~ 5t.
8. single nickel salt according to claim 7 goes deimpurity method, it is characterized in that: treatment step of being milled by finished product in addition after described step 4), obtains single nickel salt finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410079340.8A CN104250023A (en) | 2014-03-05 | 2014-03-05 | Method for removing impurities from nickel sulfate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410079340.8A CN104250023A (en) | 2014-03-05 | 2014-03-05 | Method for removing impurities from nickel sulfate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104250023A true CN104250023A (en) | 2014-12-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410079340.8A Pending CN104250023A (en) | 2014-03-05 | 2014-03-05 | Method for removing impurities from nickel sulfate |
Country Status (1)
| Country | Link |
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| CN (1) | CN104250023A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104591304A (en) * | 2015-01-13 | 2015-05-06 | 江西赣锋锂业股份有限公司 | Method for treating waste material containing nickel sulfate |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102627333A (en) * | 2012-04-24 | 2012-08-08 | 中南大学 | Method for refined nickel sulfate |
| CN103224259A (en) * | 2013-05-15 | 2013-07-31 | 大冶有色金属有限责任公司 | Method for refining crude nickel sulphate and recycling valuable metals |
-
2014
- 2014-03-05 CN CN201410079340.8A patent/CN104250023A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102627333A (en) * | 2012-04-24 | 2012-08-08 | 中南大学 | Method for refined nickel sulfate |
| CN103224259A (en) * | 2013-05-15 | 2013-07-31 | 大冶有色金属有限责任公司 | Method for refining crude nickel sulphate and recycling valuable metals |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104591304A (en) * | 2015-01-13 | 2015-05-06 | 江西赣锋锂业股份有限公司 | Method for treating waste material containing nickel sulfate |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20141231 |
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| RJ01 | Rejection of invention patent application after publication |