CN111847497A - Method for separating manganese and zinc by liquid alkali - Google Patents
Method for separating manganese and zinc by liquid alkali Download PDFInfo
- Publication number
- CN111847497A CN111847497A CN202010617146.6A CN202010617146A CN111847497A CN 111847497 A CN111847497 A CN 111847497A CN 202010617146 A CN202010617146 A CN 202010617146A CN 111847497 A CN111847497 A CN 111847497A
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- Prior art keywords
- zinc
- manganese
- liquid
- mixed solution
- precipitate
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- 239000007788 liquid Substances 0.000 title claims abstract description 74
- 239000011701 zinc Substances 0.000 title claims abstract description 48
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 239000003513 alkali Substances 0.000 title claims abstract description 34
- 229910052748 manganese Inorganic materials 0.000 title claims abstract description 34
- 239000011572 manganese Substances 0.000 title claims abstract description 34
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 229910052725 zinc Inorganic materials 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 18
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 45
- 239000011259 mixed solution Substances 0.000 claims abstract description 39
- 239000002244 precipitate Substances 0.000 claims abstract description 32
- WJZHMLNIAZSFDO-UHFFFAOYSA-N manganese zinc Chemical compound [Mn].[Zn] WJZHMLNIAZSFDO-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000003756 stirring Methods 0.000 claims abstract description 23
- 238000001914 filtration Methods 0.000 claims abstract description 18
- 235000011121 sodium hydroxide Nutrition 0.000 claims abstract description 15
- 239000002699 waste material Substances 0.000 claims abstract description 15
- 229910021511 zinc hydroxide Inorganic materials 0.000 claims abstract description 15
- UGZADUVQMDAIAO-UHFFFAOYSA-L zinc hydroxide Chemical compound [OH-].[OH-].[Zn+2] UGZADUVQMDAIAO-UHFFFAOYSA-L 0.000 claims abstract description 12
- 229940007718 zinc hydroxide Drugs 0.000 claims abstract description 12
- 230000002572 peristaltic effect Effects 0.000 claims abstract description 11
- 238000000967 suction filtration Methods 0.000 claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 229910052751 metal Inorganic materials 0.000 claims abstract description 4
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 claims abstract description 4
- 229910000368 zinc sulfate Inorganic materials 0.000 claims abstract description 4
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 239000000243 solution Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000007832 Na2SO4 Substances 0.000 claims description 3
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 3
- 229940099596 manganese sulfate Drugs 0.000 claims description 3
- 239000011702 manganese sulphate Substances 0.000 claims description 3
- 235000007079 manganese sulphate Nutrition 0.000 claims description 3
- SQQMAOCOWKFBNP-UHFFFAOYSA-L manganese(II) sulfate Chemical compound [Mn+2].[O-]S([O-])(=O)=O SQQMAOCOWKFBNP-UHFFFAOYSA-L 0.000 claims description 3
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 3
- 239000011686 zinc sulphate Substances 0.000 claims description 3
- 238000000926 separation method Methods 0.000 abstract description 2
- 239000003054 catalyst Substances 0.000 abstract 1
- 239000012535 impurity Substances 0.000 abstract 1
- 230000001376 precipitating effect Effects 0.000 abstract 1
- 229960001763 zinc sulfate Drugs 0.000 abstract 1
- 238000005406 washing Methods 0.000 description 13
- 239000000047 product Substances 0.000 description 4
- 238000000151 deposition Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000010808 liquid waste Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 150000003751 zinc Chemical class 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G9/00—Compounds of zinc
- C01G9/02—Oxides; Hydroxides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
Abstract
The invention provides a method for separating manganese and zinc by liquid alkali, which comprises the steps of selecting waste liquid after workshop production, detecting the content of metal elements in the waste liquid by an ICP emission spectrometer, adopting manganese and zinc liquid containing 19-22 g/L, Zn 5-7 g/L of manganese in the waste liquid, slowly adding 32% of liquid alkali into the manganese and zinc liquid through a peristaltic pump to form mixed solution, continuously stirring for 15min after the liquid alkali is added, and stirring the mixed solution; pouring the mixed solution into a filter screen for filtering, carrying out suction filtration on the mixed solution on the upper side of the filter screen for three times to obtain zinc hydroxide precipitate with the purity of more than 95%, and realizing the purpose of manganese-zinc separation; according to the invention, the liquid caustic soda is directly used for precipitating the zinc sulfate, and no catalyst is required to be additionally added, so that the introduction of impurities is avoided; simple process and short flow.
Description
Technical Field
The invention belongs to the technical field of separation by a precipitation method, and particularly relates to a method for separating manganese and zinc by liquid alkali.
Background
Takes manganese zinc liquid as raw material to recover zinc hydroxide to the maximum extent, the chemical formula is Zn (OH)2It is an amorphous white powder, mainly used for zinc oxide and zinc salts, and also used in rubber manufacturing and pharmaceutical industry. Manganese-zinc liquid is generated in the workshop process production process, unnecessary waste is caused if the manganese-zinc liquid is discarded, and in order to save the company cost, a research and development center tries to separate manganese and zinc so as to achieve the purpose of changing waste into valuable.
Disclosure of Invention
According to the technical problem, the invention provides a method for separating manganese and zinc by liquid alkali, which comprises the following steps:
step 1, selecting waste liquid after workshop production, detecting the content of metal elements in the waste liquid through an ICP emission spectrometer, adopting manganese-zinc liquid containing 19-22 g/L, Zn5 g/L-Zn 7g/L of manganese in the waste liquid, slowly adding 32% of liquid alkali into the manganese-zinc liquid through a peristaltic pump to form mixed solution, continuing stirring for 15min after the liquid alkali is added, and stirring the mixed solution;
and 2, pouring the mixed solution into a filter screen for filtering, carrying out suction filtration on the mixed solution on the upper side of the filter screen for three times to obtain zinc hydroxide precipitate with the purity of more than 95%, and realizing the purpose of separating manganese and zinc.
And filtering the mixed solution on the upper side of the filter screen, filtering out the precipitate in the filter screen, standing the obtained precipitate for slurrying for 0.5 hour, adding clear water into the precipitate, stirring and washing the precipitate, and washing manganese sulfate carried in the precipitate to obtain zinc hydroxide precipitate with the purity of more than 95%, so as to realize the purpose of separating manganese from zinc.
The reaction temperature of the solution is 70-80 ℃.
The rotating speed of the peristaltic pump is set to be 6 r/min.
The molar ratio of sodium hydroxide in the liquid caustic soda to Zn in the manganese-zinc liquid is 1: 1.
The reaction principle of the step 1 is as follows: adding liquid alkali into the manganese-zinc liquid to precipitate Zn:
ZnSO4+NaOH＝＝Na2SO4+Zn(OH)2↓。
the invention has the beneficial effects that: the invention provides a method for separating manganese and zinc by liquid alkali, wherein the liquid waste contains 19-22 g/L, Zn5 g/L-Zn 7g/L manganese and zinc liquid, 32% liquid alkali is slowly added into the manganese and zinc liquid by a peristaltic pump to form a mixed solution, the mixed solution is produced by taking the liquid alkali as a raw material, and a zinc hydroxide product is obtained by filtering; the invention has simple process and short flow, avoids unnecessary waste and saves the cost of companies.
Description of the drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed description of the preferred embodiments
Example 1
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
As shown in figure 1, the method for separating manganese and zinc by liquid alkali comprises the following steps:
step 1, selecting waste liquid after workshop production, detecting the content of metal elements in the waste liquid through an ICP emission spectrometer, adopting manganese-zinc liquid containing 19-22 g/L, Zn5 g/L-Zn 7g/L of manganese in the waste liquid, slowly adding 32% of liquid alkali into the manganese-zinc liquid through a peristaltic pump to form mixed solution, continuing stirring for 15min after the liquid alkali is added, and stirring the mixed solution;
And 2, pouring the mixed solution into a filter screen for filtering, carrying out suction filtration on the mixed solution on the upper side of the filter screen for three times to obtain zinc hydroxide precipitate with the purity of more than 95%, and realizing the purpose of separating manganese and zinc.
And filtering the mixed solution on the upper side of the filter screen, filtering out the precipitate in the filter screen, standing the obtained precipitate for slurrying for 0.5 hour, adding clear water into the precipitate, stirring and washing the precipitate, and washing manganese sulfate carried in the precipitate to obtain zinc hydroxide precipitate with the purity of more than 95%, so as to realize the purpose of separating manganese from zinc.
The reaction temperature of the solution is 70-80 ℃.
The speed of the peristaltic pump was set at 6 r/min.
The molar ratio of sodium hydroxide in the liquid caustic soda to Zn in the manganese-zinc liquid is 1: 1.
The reaction principle of the step 1 is as follows: adding liquid alkali into the manganese-zinc liquid to precipitate Zn:
ZnSO4+NaOH＝＝Na2SO4+Zn(OH)2↓。
example 2
a. Depositing zinc
Detecting manganese-zinc liquid containing 20.2g/L manganese and 6.93g/L Zn, slowly adding 32% of liquid alkali into the manganese-zinc liquid at the reaction temperature of 70-80 ℃ by using a peristaltic pump, adding 26.65g of the liquid alkali into the liquid alkali when the molar ratio of sodium hydroxide in the liquid alkali to Zn in the manganese-zinc liquid is 1:1 to form mixed solution, continuously stirring the mixed solution for 15min, and stirring the mixed solution to finish the stirring.
b. Washing slag
Pouring the mixed solution into a filter screen for filtering, and performing suction filtration on the mixed solution on the upper side of the filter screen for three times of washing and suction filtration;
filtering the mixed solution on the upper side of the filter screen, filtering out internal precipitate, standing the obtained precipitate for slurrying for 0.5 hour, and adding clear water into the precipitate while stirring and washing;
after the completion, the zinc hydroxide product contains 55.82% of zinc and 1.81% of manganese by detection of precipitation.
Example 2
a. Depositing zinc
Detecting a manganese-zinc solution containing 21.6g/L of manganese and 6.24g/L of Zn, slowly adding 32% of liquid alkali into the manganese-zinc solution at the reaction temperature of 70-80 ℃ by using a peristaltic pump, wherein the molar ratio of sodium hydroxide in the liquid alkali to Zn in the manganese-zinc solution is 1:1, adding 24.00g of the liquid alkali to form a mixed solution, continuously stirring the mixed solution for 15min, and stirring the mixed solution to finish the stirring.
b. Washing slag
Pouring the mixed solution into a filter screen for filtering, and performing suction filtration on the mixed solution on the upper side of the filter screen for three times of washing and suction filtration;
filtering the mixed solution on the upper side of the filter screen, filtering out internal precipitate, standing the obtained precipitate for slurrying for 0.5 hour, and adding clear water into the precipitate while stirring and washing;
After the completion, the zinc hydroxide product contains 56.39% of zinc and 1.61% of manganese by detection of precipitation.
Example 4
a. Depositing zinc
Detecting a manganese-zinc solution containing 19.55g/L of manganese and 6.07g/L of Zn, slowly adding 32% of liquid alkali into the manganese-zinc solution at the reaction temperature of 70-80 ℃ by using a peristaltic pump, wherein the molar ratio of sodium hydroxide in the liquid alkali to Zn in the manganese-zinc solution is 1:1, adding 23.35g of the liquid alkali to form a mixed solution, continuously stirring the mixed solution for 15min, and stirring the mixed solution to finish the stirring.
b. Washing slag
Pouring the mixed solution into a filter screen for filtering, and performing suction filtration on the mixed solution on the upper side of the filter screen for three times of washing and suction filtration;
filtering the mixed solution on the upper side of the filter screen, filtering out internal precipitate, standing the obtained precipitate for slurrying for 0.5 hour, and adding clear water into the precipitate while stirring and washing;
after the completion, the zinc hydroxide product contains 56.14% of zinc and 1.50% of manganese by detection of the precipitate.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention. It should be noted that other equivalent modifications can be made by those skilled in the art in light of the teachings of the present invention, and all such modifications can be made as are within the scope of the present invention.
Claims (6)
1. The invention provides a method for separating manganese and zinc by liquid alkali, which comprises the following steps:
step 1, selecting waste liquid after workshop production, detecting the content of metal elements in the waste liquid through an ICP emission spectrometer, adopting manganese-zinc liquid containing 19-22 g/L, Zn5 g/L-Zn 7g/L of manganese in the waste liquid, slowly adding 32% of liquid alkali into the manganese-zinc liquid through a peristaltic pump to form mixed solution, continuing stirring for 15min after the liquid alkali is added, and stirring the mixed solution;
and 2, pouring the mixed solution into a filter screen for filtering, carrying out suction filtration on the mixed solution on the upper side of the filter screen for three times to obtain zinc hydroxide precipitate with the purity of more than 95%, and realizing the purpose of separating manganese and zinc.
2. The method for separating manganese and zinc through liquid alkali as claimed in claim 1, wherein the mixed solution is filtered at the upper side of a filter screen, the internal precipitate is filtered out, the obtained precipitate is placed for slurrying for 0.5 hour, then clear water is added into the precipitate, the precipitate is washed with stirring, manganese sulfate carried in the precipitate is washed, zinc hydroxide precipitate with the purity of more than 95% is obtained, and the purpose of separating manganese and zinc is achieved.
3. The method for separating manganese and zinc by liquid alkali according to claim 1, wherein the reaction temperature of the solution is 70-80 ℃.
4. The method for separating manganese and zinc through liquid caustic soda as claimed in claim 1, wherein the rotation speed of the peristaltic pump is set to 6 r/min.
5. The method for separating manganese and zinc by liquid caustic soda as claimed in claim 1, wherein the molar ratio of sodium hydroxide in the liquid caustic soda to Zn in the manganese-zinc liquid is 1: 1.
6. The method for separating manganese and zinc by liquid alkali according to claim 1, wherein the reaction principle of the step 1 is as follows: adding liquid alkali into the manganese-zinc liquid to precipitate Zn: ZnSO4+NaOH＝＝Na2SO4+Zn(OH)2↓。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010617146.6A CN111847497A (en) | 2020-06-30 | 2020-06-30 | Method for separating manganese and zinc by liquid alkali |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010617146.6A CN111847497A (en) | 2020-06-30 | 2020-06-30 | Method for separating manganese and zinc by liquid alkali |
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| Publication Number | Publication Date |
|---|---|
| CN111847497A true CN111847497A (en) | 2020-10-30 |
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| CN202010617146.6A Pending CN111847497A (en) | 2020-06-30 | 2020-06-30 | Method for separating manganese and zinc by liquid alkali |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101973572A (en) * | 2010-10-25 | 2011-02-16 | 王嘉兴 | Method for preparing zinc hydroxide and co-producing manganese sulfate and ferrous hydroxide by using waste residue obtained by producing lithopone |
| CN103227337A (en) * | 2013-04-11 | 2013-07-31 | 安徽理工大学 | Waste zinc-manganese dry battery recovery system based on jigger sorting |
| CN104803530A (en) * | 2015-04-14 | 2015-07-29 | 焦伟祥 | Technology for sodium sulfate wastewater treatment and salt purification recycling |
| CN111041248A (en) * | 2019-12-24 | 2020-04-21 | 湖南邦普循环科技有限公司 | Method for recovering valuable metals in chlorine-containing waste liquid |
-
2020
- 2020-06-30 CN CN202010617146.6A patent/CN111847497A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101973572A (en) * | 2010-10-25 | 2011-02-16 | 王嘉兴 | Method for preparing zinc hydroxide and co-producing manganese sulfate and ferrous hydroxide by using waste residue obtained by producing lithopone |
| CN103227337A (en) * | 2013-04-11 | 2013-07-31 | 安徽理工大学 | Waste zinc-manganese dry battery recovery system based on jigger sorting |
| CN104803530A (en) * | 2015-04-14 | 2015-07-29 | 焦伟祥 | Technology for sodium sulfate wastewater treatment and salt purification recycling |
| CN111041248A (en) * | 2019-12-24 | 2020-04-21 | 湖南邦普循环科技有限公司 | Method for recovering valuable metals in chlorine-containing waste liquid |
Non-Patent Citations (4)
| Title |
|---|
| RAFFAELE MOLINARI ET AL.: "Selective removal of Cu2+ versus Ni2+, Zn2+ and Mn2+ by using a new carrier in a supported liquid membrane", 《JOURNAL OF MEMBRANE SCIENCE》 * |
| 柏景方主编: "《污水处理技术 2006年7月第1版》", 31 July 2006, 哈尔滨工业大学出版社 * |
| 王静静等: "氨法从氯化铜锰锌钴废液中选择性分离锰", 《有色金属科学与工程》 * |
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Application publication date: 20201030 |