CN101691229B - Method for desorbing potassium, sodium, lithium and boron absorbed by magnesium hydrate precipitate by using hydrocarbonate - Google Patents
Method for desorbing potassium, sodium, lithium and boron absorbed by magnesium hydrate precipitate by using hydrocarbonate Download PDFInfo
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- CN101691229B CN101691229B CN2009101643549A CN200910164354A CN101691229B CN 101691229 B CN101691229 B CN 101691229B CN 2009101643549 A CN2009101643549 A CN 2009101643549A CN 200910164354 A CN200910164354 A CN 200910164354A CN 101691229 B CN101691229 B CN 101691229B
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- lithium
- potassium
- sodium
- boron
- magnesium
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention relates to a method for desorbing potassium, sodium, lithium and boron absorbed by a magnesium hydrate precipitate by using hydrocarbonate. In a process of the conversion of magnesium into a magnesium hydroxide precipitate by a method of precipitation by the addition of an alkali in the extraction of potassium, sodium, lithium, boron and other products from bitter, the magnesium hydroxide precipitate absorbs lots of potassium, sodium, lithium, boron and other precious substances. The method is characterized in that the desorption of the potassium, sodium, lithium, boron and other precious substances from the magnesium hydroxide precipitate is completed by processing the magnesium hydroxide precipitate with the steps of size mixing, stirring, reaction and solid-liquid separation. And the method has the advantages that: the desorption effect is desirable; the cost is low; equipment is simple; the operability is high; over 90 percent of potassium, sodium, lithium and boron absorbed by the magnesium hydroxide precipitate are desorbed; the overall yield of the potassium, sodium and lithium from the bitter is improved by 3 to 4 percent; particularly, the yield of boron is improved by over 10 percent; the utilization rate of the resource is improved effectively; and good economic and social benefits are created.
Description
(1) technical field
The present invention relates to the method for a kind of potassium that is adsorbed by magnesium hydrate precipitate with the supercarbonate desorb, sodium, lithium, boron, multiplexly utilizing salt lake brine to extract the multiple products such as potassium, sodium, lithium, boron, with adding that the alkali settling process changes into magnesium hydrate precipitate with magnesium and the desorb of having adsorbed the precious materials such as potassium a large amount of in the bittern, sodium, lithium, boron belongs to the salt chemical engineering technical field.
(2) background technology
In the process of utilizing salt lake brine extraction multiple product, the demagging operation is arranged, generally be with adding the alkali settling process magnesium to be changed into magnesium hydrate precipitate, but the magnesium hydrate precipitate water content is large, has carried again the useful matteies such as a part of potassium, sodium, lithium, boron in the solution when separating out secretly.Because magnesium hydrate precipitate is difficult to washing, generally just magnesium hydrate precipitate is used as waste residue and abandons it, had a strong impact on the yield of potassium, sodium, lithium, boron, caused the loss of these materials.
(3) summary of the invention
The objective of the invention is the method for a kind of potassium that is adsorbed by magnesium hydrate precipitate with the supercarbonate desorb that the yield that improves the elements such as potassium, sodium, lithium, boron in the salt lake brine designs, sodium, lithium, boron.
The technical process that realizes the technical scheme of the object of the invention is: magnesium hydrate precipitate through size mixing, stirring reaction, solid-liquid separation finish desorb:
Size mixing is to be that 1: 1～10 ratio is disperseed the furnishing slip in mass ratio with magnesium hydrate precipitate and water;
Stirring reaction is the process that magnesium hydrate precipitate is changed into the basic carbonate magnesium precipitate, namely stirs the magnesium hydroxide slip under 10～40 ℃ temperature, is to add supercarbonate at 1～2: 1 by the mol ratio of supercarbonate and magnesium hydroxide, reacts 15 to 120 minutes;
Solid-liquid separation process is the basic carbonate magnesium precipitate that the stirring reaction operation produces directly to be separated with solution or heated solution to 40 ℃～100 ℃ of solid-liquid separation after 15 minutes.
Preferred processing condition are:
The mass ratio of magnesium hydrate precipitate and water is 1: 2～4 in the operation of sizing mixing.
The temperature that stirs magnesium hydrate precipitate in the stirring reaction is 15～30 ℃.
The reaction times of supercarbonate and magnesium hydroxide is 30～60 minutes in the stirring reaction.
The mol ratio of supercarbonate and magnesium hydroxide is 1～1.5 in the stirring reaction: 1 is better.
The supercarbonate that adds in the stirring reaction is NaHCO
3Or NH
4HCO
3Or NaHCO
3And NH
4HCO
3Mixture.
Solution is heated to 80～100 ℃ in the solid-liquid separation process.
Present method cost is low, equipment is simple, easily control, strong operability, desorption effect is good, and potassium, sodium, lithium, the boron overwhelming majority of being adsorbed by magnesium hydrate precipitate are desorbed out, and the comprehensive yield of potassium, sodium, lithium can improve 3～4% in the bittern, the yield of boron can improve more than 10%, effectively raises the utilization ratio of resource.
(4) embodiment
Embodiment 1: the magnesium hydrate precipitate that absorption is had potassium, sodium, lithium, boron is to size mixing at 2: 1 by the mass ratio of water and magnesium hydrate precipitate, stirs the magnesium hydroxide slip in the time of 25 ℃, and presses NaHCO
3With the mol ratio of magnesium hydroxide be that 1: 1 ratio adds NaHCO
3, reacting 45 minutes, magnesium hydrate precipitate is converted into the basic carbonate magnesium precipitate, and question response is finished post-heating solution to 60 ℃, solid-liquid separation, the element such as the about 93% former potassium that is adsorbed by magnesium hydrate precipitate, sodium, lithium, boron enters in the solution and is desorbed out.
Embodiment 2: the magnesium hydrate precipitate that absorption is had potassium, sodium, lithium, boron is to size mixing at 10: 1 by the mass ratio of water and magnesium hydrate precipitate, stirs slip when 38 ℃ of temperature, and presses NaHCO
3And NH
4HCO
3Mixture (both approximately respectively for half) and the mol ratio of the magnesium hydroxide ratio adding NaHCO that is 2: 1
3And NH
4HCO
3Mixture, reacted 120 minutes, magnesium hydrate precipitate is converted into the basic carbonate magnesium precipitate, and question response is finished post-heating solution to 40 ℃, solid-liquid separation, the element such as the about 95% former potassium that is adsorbed by magnesium hydrate precipitate, sodium, lithium, boron enter in the solution and are desorbed out.
Claims (7)
1. the method for a potassium that is adsorbed by magnesium hydrate precipitate with the supercarbonate desorb, sodium, lithium, boron is characterized in that: magnesium hydrate precipitate through size mixing, stirring reaction, solid-liquid separation finish desorb:
1), sizing mixing is to be that 1: 1～10 ratio is disperseed the furnishing slip in mass ratio with magnesium hydrate precipitate and water;
2), stirring reaction is the process that magnesium hydrate precipitate is changed into the basic carbonate magnesium precipitate, namely under 10～40 ℃ temperature, stir the magnesium hydroxide slip, mol ratio by supercarbonate and magnesium hydroxide is 1～2: 1 adding supercarbonate, reacts 15 to 120 minutes;
3), solid-liquid separation process is the basic carbonate magnesium precipitate that the stirring reaction operation produces directly to be separated with solution or heated solution to 40 ℃～100 ℃ of solid-liquid separation after 15 minutes.
2. the method for a kind of potassium that is adsorbed by magnesium hydrate precipitate with the supercarbonate desorb according to claim 1, sodium, lithium, boron, it is characterized in that: the mass ratio of magnesium hydrate precipitate and water is 1: 2～4 in the operation of sizing mixing.
3. the method for a kind of potassium that is adsorbed by magnesium hydrate precipitate with the supercarbonate desorb according to claim 1, sodium, lithium, boron, it is characterized in that: the temperature that stirs magnesium hydrate precipitate in the stirring reaction is 15～30 ℃.
4. the method for a kind of potassium that is adsorbed by magnesium hydrate precipitate with the supercarbonate desorb according to claim 1, sodium, lithium, boron, it is characterized in that: the reaction times of supercarbonate and magnesium hydroxide is 30～60 minutes in the stirring reaction.
5. the method for a kind of potassium that is adsorbed by magnesium hydrate precipitate with the supercarbonate desorb according to claim 1, sodium, lithium, boron, it is characterized in that: the mol ratio of supercarbonate and magnesium hydroxide is 1～1.5: 1 in the stirring reaction.
6. the method for a kind of potassium that is adsorbed by magnesium hydrate precipitate with the supercarbonate desorb according to claim 1, sodium, lithium, boron, it is characterized in that: the supercarbonate that adds in the stirring reaction is NaHCO
3Or NH
4HCO
3Or NaHCO
3And NH
4HCO
3Mixture.
7. the method for a kind of potassium that is adsorbed by magnesium hydrate precipitate with the supercarbonate desorb according to claim 1, sodium, lithium, boron, it is characterized in that: solution is heated to 80～100 ℃ in the solid-liquid separation process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101643549A CN101691229B (en) | 2009-09-02 | 2009-09-02 | Method for desorbing potassium, sodium, lithium and boron absorbed by magnesium hydrate precipitate by using hydrocarbonate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101643549A CN101691229B (en) | 2009-09-02 | 2009-09-02 | Method for desorbing potassium, sodium, lithium and boron absorbed by magnesium hydrate precipitate by using hydrocarbonate |
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| Publication Number | Publication Date |
|---|---|
| CN101691229A CN101691229A (en) | 2010-04-07 |
| CN101691229B true CN101691229B (en) | 2013-02-13 |
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| CN2009101643549A Expired - Fee Related CN101691229B (en) | 2009-09-02 | 2009-09-02 | Method for desorbing potassium, sodium, lithium and boron absorbed by magnesium hydrate precipitate by using hydrocarbonate |
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| CN107890621B (en) * | 2017-10-18 | 2020-02-18 | 华南理工大学 | Harmless treatment method for toxic solid waste containing hexavalent chromium |
| CN114538482B (en) * | 2022-03-10 | 2023-08-01 | 中国科学院过程工程研究所 | Method for preparing lithium carbonate by purifying lithium-containing solution through adsorption-pressure desorption method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101024502A (en) * | 2007-01-30 | 2007-08-29 | 西部矿业集团有限公司 | Method for combined extracting boron, magnesium and lithium from salt lake bittern |
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2009
- 2009-09-02 CN CN2009101643549A patent/CN101691229B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101024502A (en) * | 2007-01-30 | 2007-08-29 | 西部矿业集团有限公司 | Method for combined extracting boron, magnesium and lithium from salt lake bittern |
Non-Patent Citations (2)
| Title |
|---|
| C.COLINET,et al.EXPERIMENTAL AND CALCULATED ENTHALPIES OF FORMATION OF RARE EARTH-TIN ALLOYS.《Journal of the Less-Common Metals》.1984,第102卷第167-177页. * |
| 徐徽等.高镁锂比盐湖卤水镁锂分离工艺.《中南大学学报(自然科学版)》.2009,第40卷(第1期),第36-40页. * |
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