CN101659425B - Method for desorbing potassium, sodium, lithium and boron absorbed by magnesium hydroxide precipitate by CO2 - Google Patents
Method for desorbing potassium, sodium, lithium and boron absorbed by magnesium hydroxide precipitate by CO2 Download PDFInfo
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- CN101659425B CN101659425B CN 200910164355 CN200910164355A CN101659425B CN 101659425 B CN101659425 B CN 101659425B CN 200910164355 CN200910164355 CN 200910164355 CN 200910164355 A CN200910164355 A CN 200910164355A CN 101659425 B CN101659425 B CN 101659425B
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- Prior art keywords
- lithium
- potassium
- sodium
- boron
- magnesium
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 title claims abstract description 54
- 239000002244 precipitate Substances 0.000 title claims abstract description 50
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 title claims abstract description 34
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 title claims abstract description 34
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 34
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 229910052796 boron Inorganic materials 0.000 title claims abstract description 34
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 34
- 229910052700 potassium Inorganic materials 0.000 title claims abstract description 34
- 239000011591 potassium Substances 0.000 title claims abstract description 34
- 229910052708 sodium Inorganic materials 0.000 title claims abstract description 34
- 239000011734 sodium Substances 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 32
- 229910001862 magnesium hydroxide Inorganic materials 0.000 title claims abstract description 20
- 239000000347 magnesium hydroxide Substances 0.000 title claims abstract description 20
- 238000006243 chemical reaction Methods 0.000 claims abstract description 17
- 238000003756 stirring Methods 0.000 claims abstract description 17
- 238000002156 mixing Methods 0.000 claims abstract description 13
- 238000000926 separation method Methods 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims abstract description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 24
- 239000007789 gas Substances 0.000 claims description 21
- 239000003513 alkali Substances 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 229910001868 water Inorganic materials 0.000 claims description 13
- 238000003795 desorption Methods 0.000 claims description 11
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000004513 sizing Methods 0.000 claims description 4
- 239000002002 slurry Substances 0.000 claims description 2
- 229910001854 alkali hydroxide Inorganic materials 0.000 claims 1
- 150000008044 alkali metal hydroxides Chemical class 0.000 claims 1
- 238000001556 precipitation Methods 0.000 claims 1
- 238000002360 preparation method Methods 0.000 claims 1
- 239000011777 magnesium Substances 0.000 abstract description 6
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052749 magnesium Inorganic materials 0.000 abstract description 4
- 239000000047 product Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 239000012267 brine Substances 0.000 abstract 3
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 abstract 3
- 239000000126 substance Substances 0.000 abstract 2
- 238000004062 sedimentation Methods 0.000 abstract 1
- 241001131796 Botaurus stellaris Species 0.000 description 7
- 239000000463 material Substances 0.000 description 4
- 239000000084 colloidal system Substances 0.000 description 3
- 239000000284 extract Substances 0.000 description 3
- OGWLTJRQYVEDMR-UHFFFAOYSA-F tetramagnesium;tetracarbonate Chemical compound [Mg+2].[Mg+2].[Mg+2].[Mg+2].[O-]C([O-])=O.[O-]C([O-])=O.[O-]C([O-])=O.[O-]C([O-])=O OGWLTJRQYVEDMR-UHFFFAOYSA-F 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 2
- 238000003889 chemical engineering Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to a method for desorbing potassium, sodium, lithium and boron absorbed by magnesium hydroxide precipitate by CO2. When multiple products such as potassium, sodium, lithium, boron and the like are extracted from brine, in the working procedure of using an alkalifying sedimentation method to lead magnesium to be transformed to be the magnesium hydroxide precipitate, the magnesium hydroxide precipitate absorbs more valuable substances such as potassium, sodium, lithium, boron and the like from the brine; the method leads the magnesium hydroxide precipitate to be processed by the working procedures of size mixing, stirring for reaction and solid-liquid separation, thus desorbing the valuable substances such as potassium, sodium, lithium, boron and the like from the magnesium hydroxide precipitate. The method has the advantages of good desorbing effect, low cost, simple equipment and strong operability; furthermore, more than 90% of potassium, sodium, lithium and boron which are absorbed by magnesium hydroxide precipitate can be desorbed, the integrated yield of potassium, sodium and lithium in the brine can be improved by 3-4%, and especially the yield of boron can be improved more than 10%. Therefore, the utilization rate of resources is effectively improved, and the economic and social benefits are good.
Description
(1) technical field
The present invention relates to a kind of CO of using
2The method of the potassium that desorption of gases is adsorbed by magnesium hydrate precipitate, sodium, lithium, boron, multiplexly utilizing bittern 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 bittern, sodium, lithium, boron belongs to the salt chemical engineering technical field.
(2) background technology
In the process of utilizing bittern extraction multiple product, the demagging operation is arranged, generally with adding the alkali settling process, magnesium to be changed into magnesium hydrate precipitate, but the magnesium hydrate precipitate water content is large, the useful matteies such as a part of potassium, sodium, lithium, boron in solution have been carried when separating out secretly, and magnesium hydrate precipitate is difficult to washing, the magnesium hydrate precipitate that generally just will carry the useful matteies such as potassium, sodium, lithium, boron secretly is used as waste residue and is abandoned it, cause the loss of these precious materials, had a strong impact on the yield that extracts potassium, sodium, lithium, boron from bittern.
(3) summary of the invention
The object of the present invention is to provide a kind of CO of using
2The method of the potassium that desorption of gases is adsorbed by magnesium hydrate precipitate, sodium, lithium, boron, thus the yield that extracts the materials such as potassium, sodium, lithium, boron from bittern improved.
The technical scheme that realizes the object of the invention is:
To utilize during bittern extracts the process of multiple product, with add magnesium hydrate precipitate that the alkali settling process changes into magnesium through size mixing, stirring reaction, solid-liquid separation process complete magnesium hydrate precipitate to the desorb of the materials such as potassium, sodium, lithium, boron:
The operation of sizing mixing is with magnesium hydrate precipitate and the water process by 1: 1～10 the loose furnishing slurry of mass ratio;
The stirring reaction operation is the process of basic carbonate magnesium precipitate that magnesium hydrate precipitate is converted into: i.e. the size mixing slip to 25 that operation makes～100 ℃ of heating passes into CO
2Gas or at logical CO
2Add part alkali in the time of gas, be adjusted to the pH=7 of slip～12, then add alkali, make magnesium hydrate precipitate change into the basic carbonate magnesium precipitate, it adds the total amount of alkali and the mol ratio of magnesium hydroxide is 0.1～1: 1.Pass into CO
2Preferably add alkali during gas, make magnesium hydrate precipitate be converted into the basic carbonate magnesium precipitate more thorough;
Solid-liquid separation process is basic carbonate magnesium precipitate that the stirring reaction operation is produced and the process of solution separating, as settlement separate, filtering separation etc.
As preferably:
In the operation of sizing mixing, magnesium hydrate precipitate and water are sized mixing by 1: 1～5.
Stirring reaction operation slip is heated to 40～60 ℃.
The alkali that adds in the stirring reaction operation is NaOH or Ca (OH)
2, be more preferably NaOH.
Pass into CO in the stirring reaction operation
2The pH=7 of rear control slip～9.
In the stirring reaction operation, the alkali that adds and the mol ratio of magnesium hydroxide are 0.1～0.5: 1.
The CO that passes in the stirring reaction operation
2, can be pure CO
2, can be also CO
2Mixture with air.
Magnesium hydroxide is in the process that transforms to magnesium basic carbonate, and magnesium hydroxide colloid destructurized discharges planar water, the elements such as the potassium that contains in planar water, sodium, lithium, boron are entered in solution and is desorbed out.
Use CO
2Gas comes the method desorption effect of potassium that desorb adsorbed by magnesium hydrate precipitate, sodium, lithium, boron good, potassium more than 90%, sodium, lithium, boron are desorbed out, cost is low, equipment is simple, strong operability, in bittern, the comprehensive yield of potassium, sodium, lithium can improve 3～4%, and especially the yield of boron can improve more than 10%, has effectively improved 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 4: 1 by the mass ratio of water and magnesium hydrate precipitate, and heating magnesium hydrate precipitate slip to 60 ℃ passes into CO
2Gas.CO
2The terminal point of gas carbonization magnesium hydroxide is controlled at the pH=7.5 of slip～7.8, and NaOH is pressed NaOH and Mg (OH)
2Mol ratio be that the ratio of 0.4: 1 adds, make magnesium hydrate precipitate be converted into the basic carbonate magnesium precipitate, pH value of solution after question response is completed=8～9.Magnesium hydroxide is in the process that transforms to magnesium basic carbonate, magnesium hydroxide colloid destructurized, discharge planar water, the elements such as the potassium that contains in planar water, sodium, lithium, boron are entered in solution and be desorbed out, then solid-liquid separation becomes the basic carbonate magnesium precipitate and contains the solution of lithium, sodium, potassium, boron.
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, and heating magnesium hydroxide slip to 80 ℃ passes into CO
2Gas.CO
2Gas volume fraction is 40% (all the other is air), CO
2The terminal point of gas carbonization magnesium hydroxide is controlled at the pH=8 of slip～9, and NaOH is pressed NaOH and Mg (OH)
2Mol ratio be that the ratio of 0.8: 1 adds, make magnesium hydrate precipitate be converted into the basic carbonate magnesium precipitate, pH value of solution after question response is completed=10～11.Magnesium hydroxide is in the process that transforms to magnesium basic carbonate, magnesium hydroxide colloid destructurized, discharge planar water, the elements such as the potassium that contains in planar water, sodium, lithium, boron are entered in solution and be desorbed out, then solid-liquid separation becomes the basic carbonate magnesium precipitate and contains the solution of lithium, sodium, potassium, boron.
Claims (7)
1. use CO for one kind
2The method of the potassium that desorption of gases is adsorbed by magnesium hydrate precipitate, sodium, lithium, boron is characterized in that: magnesium hydrate precipitate through size mixing, stirring reaction, solid-liquid separation process complete desorb: the operation of sizing mixing is with magnesium hydrate precipitate and the water process by 1: 1～10 the loose furnishing slurry of mass ratio;
The stirring reaction operation is the process of basic carbonate magnesium precipitate that magnesium hydrate precipitate is converted into: i.e. the size mixing slip to 25 that operation makes～100 ℃ of heating passes into CO
2Gas or at logical CO
2Add alkali during gas, be adjusted to the pH=7 of slip～12, then add alkali, it adds the total amount of alkali and the mol ratio of magnesium hydroxide is 0.1～1: 1;
Solid-liquid separation process is with the precipitation of stirring reaction operation generation and the process of solution separating.
2. a kind of CO that uses according to claim 1
2The method of the potassium that desorption of gases is adsorbed by magnesium hydrate precipitate, sodium, lithium, boron is characterized in that: in the operation of sizing mixing, magnesium hydrate precipitate and water are sized mixing by 1: 1～5.
3. a kind of CO that uses according to claim 1
2The method of the potassium that desorption of gases is adsorbed by magnesium hydrate precipitate, sodium, lithium, boron is characterized in that: stirring reaction operation slip is heated to 40～60 ℃.
4. a kind of CO that uses according to claim 1
2The method of the potassium that desorption of gases is adsorbed by magnesium hydrate precipitate, sodium, lithium, boron is characterized in that: the alkali that adds in the stirring reaction operation is NaOH or Ca (OH)
2
5. a kind of CO that uses according to claim 1
2The method of the potassium that desorption of gases is adsorbed by magnesium hydrate precipitate, sodium, lithium, boron is characterized in that: pass into CO in the stirring reaction operation
2The pH=7 of rear control slip～9.
6. a kind of CO that uses according to claim 1
2The method of the potassium that desorption of gases is adsorbed by magnesium hydrate precipitate, sodium, lithium, boron is characterized in that: in the stirring reaction operation, the total amount that adds alkali is 0.1～0.5: 1 preparation by the mol ratio of alkali and magnesium hydroxide.
7. a kind of CO that uses according to claim 4
2The method of the potassium that desorption of gases is adsorbed by magnesium hydrate precipitate, sodium, lithium, boron is characterized in that: the alkali that adds in the stirring reaction operation is NaOH.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910164355 CN101659425B (en) | 2009-09-02 | 2009-09-02 | Method for desorbing potassium, sodium, lithium and boron absorbed by magnesium hydroxide precipitate by CO2 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910164355 CN101659425B (en) | 2009-09-02 | 2009-09-02 | Method for desorbing potassium, sodium, lithium and boron absorbed by magnesium hydroxide precipitate by CO2 |
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| Publication Number | Publication Date |
|---|---|
| CN101659425A CN101659425A (en) | 2010-03-03 |
| CN101659425B true CN101659425B (en) | 2013-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910164355 Expired - Fee Related CN101659425B (en) | 2009-09-02 | 2009-09-02 | Method for desorbing potassium, sodium, lithium and boron absorbed by magnesium hydroxide precipitate by CO2 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102190345B (en) * | 2010-03-10 | 2014-08-20 | 中国科学院福建物质结构研究所 | Method for enriching low-concentration heavy metal in water by recyclable magnesium hydroxide adsorbent |
| CN110182821B (en) * | 2019-06-27 | 2023-07-07 | 吉林大学 | CO utilization 2 Method for separating lithium, potassium and boron from carbonate type salt lake brine |
| CN114538482B (en) * | 2022-03-10 | 2023-08-01 | 中国科学院过程工程研究所 | A kind of method that absorption-pressure desorption method purifies lithium-containing solution and prepares lithium carbonate |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1074297A2 (en) * | 1999-08-06 | 2001-02-07 | Air Products And Chemicals, Inc. | Carbon dioxide adsorbents containing magnesium oxide suitable for use at high temperatures |
| US7247242B1 (en) * | 2001-10-10 | 2007-07-24 | Sandia Corporation | Arsenic removal from water |
| CN101327942A (en) * | 2008-07-29 | 2008-12-24 | 国家海洋局天津海水淡化与综合利用研究所 | Method for preparing light magnesium carbonate and magnesium oxide from dolomite sea water bittern |
-
2009
- 2009-09-02 CN CN 200910164355 patent/CN101659425B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1074297A2 (en) * | 1999-08-06 | 2001-02-07 | Air Products And Chemicals, Inc. | Carbon dioxide adsorbents containing magnesium oxide suitable for use at high temperatures |
| US7247242B1 (en) * | 2001-10-10 | 2007-07-24 | Sandia Corporation | Arsenic removal from water |
| CN101327942A (en) * | 2008-07-29 | 2008-12-24 | 国家海洋局天津海水淡化与综合利用研究所 | Method for preparing light magnesium carbonate and magnesium oxide from dolomite sea water bittern |
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| CN101659425A (en) | 2010-03-03 |
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