CN102320643B - Method for separating strontium chloride from calcium chloride - Google Patents
Method for separating strontium chloride from calcium chloride Download PDFInfo
- Publication number
- CN102320643B CN102320643B CN 201110125792 CN201110125792A CN102320643B CN 102320643 B CN102320643 B CN 102320643B CN 201110125792 CN201110125792 CN 201110125792 CN 201110125792 A CN201110125792 A CN 201110125792A CN 102320643 B CN102320643 B CN 102320643B
- Authority
- CN
- China
- Prior art keywords
- chloride
- strontium
- calcium chloride
- strontium chloride
- calcium
- Prior art date
- 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.)
- Expired - Fee Related
Links
- 229910001631 strontium chloride Inorganic materials 0.000 title claims abstract description 52
- AHBGXTDRMVNFER-UHFFFAOYSA-L strontium dichloride Chemical compound [Cl-].[Cl-].[Sr+2] AHBGXTDRMVNFER-UHFFFAOYSA-L 0.000 title claims abstract description 52
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 title claims abstract description 32
- 229910001628 calcium chloride Inorganic materials 0.000 title claims abstract description 31
- 239000001110 calcium chloride Substances 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 37
- 238000000926 separation method Methods 0.000 claims abstract description 34
- 239000007788 liquid Substances 0.000 claims abstract description 15
- CJICRDOFESUSLQ-UHFFFAOYSA-L [Cl-].[Ca+2].[Cl-].[Sr+2] Chemical compound [Cl-].[Ca+2].[Cl-].[Sr+2] CJICRDOFESUSLQ-UHFFFAOYSA-L 0.000 claims description 60
- 239000000203 mixture Substances 0.000 claims description 19
- 239000000843 powder Substances 0.000 claims description 12
- 239000007787 solid Substances 0.000 claims description 12
- 238000009835 boiling Methods 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 4
- 229910052712 strontium Inorganic materials 0.000 abstract description 10
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 abstract description 10
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract 1
- 229910052791 calcium Inorganic materials 0.000 abstract 1
- 239000011575 calcium Substances 0.000 abstract 1
- 238000005191 phase separation Methods 0.000 abstract 1
- 239000012065 filter cake Substances 0.000 description 20
- 238000011084 recovery Methods 0.000 description 10
- 238000000967 suction filtration Methods 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- BDAGIHXWWSANSR-NJFSPNSNSA-N hydroxyformaldehyde Chemical compound O[14CH]=O BDAGIHXWWSANSR-NJFSPNSNSA-N 0.000 description 4
- 229910000018 strontium carbonate Inorganic materials 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000005660 chlorination reaction Methods 0.000 description 3
- 238000002386 leaching Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- IRERQBUNZFJFGC-UHFFFAOYSA-L azure blue Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[S-]S[S-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-] IRERQBUNZFJFGC-UHFFFAOYSA-L 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 229910052667 lazurite Inorganic materials 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 description 1
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 241001131796 Botaurus stellaris Species 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- VAWSWDPVUFTPQO-UHFFFAOYSA-N calcium strontium Chemical compound [Ca].[Sr] VAWSWDPVUFTPQO-UHFFFAOYSA-N 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Landscapes
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The invention relates to a method for separating strontium chloride from calcium chloride, which comprises the following steps: (1) strontium chloride and calcium chloride solution to be separated is vaporized under ebullience condition so that finally water in strontium chloride and calcium chloride compound is between 0.77 multiplied by (0.2270M plus 1.1392N) and 1.28 multiplied by (0.2270M plus 1.1392N) kilograms; and (2) solid-liquid separation is carried out on the strontium chloride and calcium chloride compound which is obtained in the step (1) at 32 DEG C to 80 DEG C so that the solidstrontium chloride is obtained. The method for separating the strontium chloride from the calcium chloride has the advantages of simple process and low cost. Strontium chloride with higher purity is obtained by a strontium and calcium system with high strontium content through phase separation.
Description
Technical field
The present invention relates to the strontium chloride production technique, relate in particular to a kind of strontium chloride calcium chloride separation method.
Background technology
Utilizing lazurite to produce the most ripe technology of Strontium carbonate powder is carbon reduction method, and this technology is fit to scale operation, and is widely used, and national carbon reduction method Strontium carbonate powder output is above 200,000 tons.1 ton of Strontium carbonate powder of the every production of this technology produces 2.5 tons waste residue approximately, and strontium content is higher than 8% in the waste residue.With this waste residue of hydrochloric acid leaching, obtain the solution of strontium chloride calcium chloride, the ratio of strontium chloride calcium chloride is different because of leaching technology and raw material difference in the solution, but ratio need be separated strontium chloride calcium chloride acquisition strontium chloride product generally greater than 1: 2.United States Patent (USP) 1831251 has proposed a kind of separation method of strontium, and patent is described accordingly, and this method can be settled out a large amount of calcium chloride at the strontium of minute quantity in the content of strontium less relatively situation, particularly bittern in the strontium chloride enrichment, and purity is lower.United States Patent (USP) 3498758 has also been analyzed patent No. 1831251, thinks to be settled out a large amount of calcium chloride simultaneously.
Summary of the invention
Technical problem to be solved by this invention provides a kind of simple and easy to do strontium chloride calcium chloride separation method.
For addressing the above problem, a kind of strontium chloride calcium chloride separation method of the present invention may further comprise the steps:
(1) strontium chloride calcium chloride solution to be separated is evaporated under boiling state, make the water yield in the final strontium chloride calcium chloride mixture in 0.77 * (0.2270M+1.1392N)～1.28 * (0.2270M+1.1392N) kilograms of scopes, wherein M is the strontium chloride total mass, the unit kilogram, N is the calcium chloride total mass, the unit kilogram, M/N＞0.2;
(2) the strontium chloride calcium chloride mixture with described step (1) gained carries out solid-liquid separation under 32～80 ℃ of temperature, obtains the solid strontium chloride.
Replace above-mentioned steps (1) with following preparation method: strontium chloride calcium chloride solution to be separated is mixed with anhydrous strontium chloride-calcium chloride solid, make the water yield in the final strontium chloride calcium chloride mixture in 0.77 * (0.2270M+1.1392N)～1.28 * (0.2270M+1.1392N) kilograms of scopes, wherein M is the strontium chloride total mass, the unit kilogram, N is the calcium chloride total mass, the unit kilogram, M/N＞0.2.
Replace the above step (1) with following preparation method: strontium chloride calcium chloride solution to be separated is mixed with the Calcium Chloride Powder Anhydrous solid, make the water yield in the final strontium chloride calcium chloride mixture in 0.77 * (0.2270M+1.1392N)～1.28 * (0.2270M+1.1392N) kilograms of scopes, wherein M is the strontium chloride total mass, the unit kilogram, N is the calcium chloride total mass, the unit kilogram, M/N＞0.2.
The solid-liquid separation temperature is 60～80 ℃ in the described step (2).
The present invention compared with prior art has the following advantages:
1, the present invention is not too low strontium calcium system to content of strontium, and the manipulated variable of water has targetedly been determined in experiment, and has obtained the higher strontium chloride of purity under than the high temperature of No. 1831251 patents of the U.S. by being separated.
2, technology of the present invention is simple, and is with low cost.
Embodiment
1 one kinds of strontium chloride calcium chloride of embodiment separation method may further comprise the steps:
(1) contains calcium chloride 70.0 grams, strontium chloride 58.0 grams, water 500 grams, the butt purity 45.3% of this solution chlorination strontium in the strontium chloride calcium chloride solution to be separated.
Strontium chloride calcium chloride solution to be separated is evaporated under boiling state, and making the water yield in the final strontium chloride calcium chloride mixture is 72.2 grams, i.e. water yield control is at 0.77* (0.2270M+1.1392N).
(2) the strontium chloride calcium chloride mixture with step (1) gained carries out solid-liquid separation at 32 ℃ of following suction filtrations, obtains filter cake, the butt purity 69.2% of strontium chloride in the filter cake, the rate of recovery 72.5% of strontium chloride.
2 one kinds of strontium chloride calcium chloride of embodiment separation method may further comprise the steps:
(1) contains calcium chloride 50.1 grams, strontium chloride 63.5 grams, water 500 grams, the butt purity 55.9% of this solution chlorination strontium in the strontium chloride calcium chloride solution to be separated.
Strontium chloride calcium chloride solution to be separated is evaporated under boiling state, and to the water yield 91.9 grams, i.e. water yield control is at 1.28* (0.2270M+1.1392N) with this solution evaporation.
(2) strontium chloride calcium chloride mixture suction filtration under 80 ℃ of temperature of step (1) gained is carried out solid-liquid separation and obtain filter cake, the butt purity 87.0% of strontium chloride in the filter cake, the rate of recovery 77% of strontium chloride.
3 one kinds of strontium chloride calcium chloride of embodiment separation method may further comprise the steps:
(1) contain in the strontium chloride calcium chloride solution to be separated calcium chloride 62.0 grams, strontium chloride 52.0 grams,, water 500 grams, the butt purity 45.6% of this solution chlorination strontium.
Strontium chloride calcium chloride solution to be separated is evaporated under boiling state, and to the water yield 86 grams, i.e. water yield control is at 1.04* (0.2270M+1.1392N) with this solution evaporation.
(2) the strontium chloride calcium chloride mixture suction filtration under 50 ℃ of temperature with step (1) gained carries out solid-liquid separation, obtains filter cake, the butt purity 83.8% of strontium chloride in the filter cake, the rate of recovery 85% of strontium chloride.
4 one kinds of strontium chloride calcium chloride of embodiment separation method may further comprise the steps:
(1) the strontium chloride calcium chloride solution to be separated that will contain calcium chloride 62.0 grams, strontium chloride 52.4 grams, water 135 grams mixes with 46.0 gram Calcium Chloride Powder Anhydrous solids, under 100～120 ℃ of temperature, stirred 30 minutes, because of beaker not airtight, constantly add moisture to keep the water yield constant, i.e. water yield control is at 1.0* (0.2270M+1.1392N).
(2) the strontium chloride calcium chloride mixture suction filtration under 60 ℃ of temperature with step (1) gained carries out solid-liquid separation, obtains filter cake, the butt purity 86.8% of strontium chloride in the filter cake, the rate of recovery 81.7% of strontium chloride.
5 one kinds of strontium chloride calcium chloride of embodiment separation method may further comprise the steps:
(1) the strontium chloride calcium chloride solution to be separated that will contain calcium chloride 62.0 grams, strontium chloride 52.4 grams, water 135 grams mixes with 46.0 gram Calcium Chloride Powder Anhydrous solids, under 100～120 ℃ of temperature, stirred 30 minutes, because of beaker not airtight, constantly add moisture to keep the water yield constant, i.e. water yield control is at 1.0* (0.2270M+1.1392N).
(2) the strontium chloride calcium chloride mixture suction filtration under 70 ℃ of temperature with step (1) gained carries out solid-liquid separation, obtains filter cake, the butt purity 86.3% of strontium chloride in the filter cake, the rate of recovery 81.1% of strontium chloride.
6 one kinds of strontium chloride calcium chloride of embodiment separation method may further comprise the steps:
(1) the strontium chloride calcium chloride solution to be separated that will contain calcium chloride 62.0 grams, strontium chloride 52.4 grams, water 135 grams mixes with 46.0 gram Calcium Chloride Powder Anhydrous solids, under 100～120 ℃ of temperature, stirred 30 minutes, because of beaker not airtight, constantly add moisture to keep the water yield constant, i.e. water yield control is at 1.0* (0.2270M+1.1392N).
(2) the strontium chloride calcium chloride mixture suction filtration under 80 ℃ of temperature with step (1) gained carries out solid-liquid separation, obtains filter cake, the butt purity 86.7% of strontium chloride in the filter cake, the rate of recovery 80.9% of strontium chloride.
7 one kinds of strontium chloride calcium chloride of embodiment separation method may further comprise the steps:
(1) the strontium chloride calcium chloride solution to be separated that will contain calcium chloride 62.0 grams, strontium chloride 35.7 grams, water 135 grams mixes with 46.0 gram Calcium Chloride Powder Anhydrouss, 16.7 gram anhydrous strontium chloride solids, under 100～120 ℃ of temperature, stirred 30 minutes, because of beaker not airtight, constantly add moisture to keep the water yield constant, i.e. water yield control is at 1.0* (0.2270M+1.1392N).
(2) the strontium chloride calcium chloride mixture suction filtration under 60 ℃ of temperature with step (1) gained carries out solid-liquid separation, obtains filter cake, the butt purity 86.9% of strontium chloride in the filter cake, the rate of recovery 81.9% of strontium chloride.
8 one kinds of strontium chloride calcium chloride of embodiment separation method may further comprise the steps:
(1) the strontium chloride calcium chloride solution to be separated that will contain calcium chloride 62.0 grams, strontium chloride 35.7 grams, water 135 grams mixes with 46.0 gram Calcium Chloride Powder Anhydrouss, 16.7 gram anhydrous strontium chloride solids, under 100～120 ℃ of temperature, stirred 30 minutes, because of beaker not airtight, constantly add moisture to keep the water yield constant, i.e. water yield control is at 1.0* (0.2270M+1.1392N).
(2) the strontium chloride calcium chloride mixture suction filtration under 70 ℃ of temperature with step (1) gained carries out solid-liquid separation, obtains filter cake, the butt purity 86.4% of strontium chloride in the filter cake, the rate of recovery 81.3% of strontium chloride.
9 one kinds of strontium chloride calcium chloride of embodiment separation method may further comprise the steps:
(1) the strontium chloride calcium chloride solution to be separated that will contain calcium chloride 62.0 grams, strontium chloride 35.7 grams, water 135 grams mixes with 46.0 gram Calcium Chloride Powder Anhydrouss, 16.7 gram anhydrous strontium chloride solids, under 100～120 ℃ of temperature, stirred 30 minutes, because of beaker not airtight, constantly add moisture to keep the water yield constant, i.e. water yield control is at 1.0* (0.2270M+1.1392N).
(2) the strontium chloride calcium chloride mixture suction filtration under 80 ℃ of temperature with step (1) gained carries out solid-liquid separation, obtains filter cake, the butt purity 87.1% of strontium chloride in the filter cake, the rate of recovery 81% of strontium chloride.
10 1 kinds of strontium chloride calcium chloride of embodiment separation method may further comprise the steps:
(1) product of waste residue behind hydrochloric acid leaching that lazurite reduction with carbon method production Strontium carbonate powder is obtained got 1000ml, analysis knows that wherein calcium chloride is 120.4 grams, strontium chloride 68.6 grams, being evaporated to the water yield under boiling state is 153 grams, i.e. water yield control is at 1.0* (0.2270M+1.1392N).
(2) the strontium chloride calcium chloride mixture suction filtration under 69 ℃ of temperature with step (1) gained carries out solid-liquid separation, obtains filter cake, the butt purity 85.1% of strontium chloride in the filter cake, the rate of recovery 78% of strontium chloride.
Should be appreciated that embodiment discussed here and embodiment can propose various improvement and variation just in order to illustrate to the people who is familiar with this field, these improvement and variation will be included in the application's spirit and scope and the appended claim scope.
Claims (4)
1. strontium chloride calcium chloride separation method may further comprise the steps:
(1) strontium chloride calcium chloride solution to be separated is evaporated under boiling state, make the water yield in the final strontium chloride calcium chloride mixture in 0.77 * (0.2270M+1.1392N)～1.28 * (0.2270M+1.1392N) kilograms of scopes, wherein M is the strontium chloride total mass, the unit kilogram, N is the calcium chloride total mass, the unit kilogram, M/N＞0.2;
(2) the strontium chloride calcium chloride mixture with described step (1) gained carries out solid-liquid separation under 32～80 ℃ of temperature, obtains the solid strontium chloride.
2. a kind of strontium chloride calcium chloride separation method as claimed in claim 1, it is characterized in that: replace step described in the claim 1 (1) with following preparation method: strontium chloride calcium chloride solution to be separated is mixed with anhydrous strontium chloride-calcium chloride solid, make the water yield in the final strontium chloride calcium chloride mixture in 0.77 * (0.2270M+1.1392N)～1.28 * (0.2270M+1.1392N) kilograms of scopes, wherein M is the strontium chloride total mass, the unit kilogram, N is the calcium chloride total mass, the unit kilogram, M/N＞0.2.
3. a kind of strontium chloride calcium chloride separation method as claimed in claim 1, it is characterized in that: replace step described in the claim 1 (1) with following preparation method: strontium chloride calcium chloride solution to be separated is mixed with the Calcium Chloride Powder Anhydrous solid, make the water yield in the final strontium chloride calcium chloride mixture in 0.77 * (0.2270M+1.1392N)～1.28 * (0.2270M+1.1392N) kilograms of scopes, wherein M is the strontium chloride total mass, the unit kilogram, N is the calcium chloride total mass, the unit kilogram, M/N＞0.2.
4. a kind of strontium chloride calcium chloride separation method as claimed in claim 1 is characterized in that: the solid-liquid separation temperature is 60～80 ℃ in the described step (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110125792 CN102320643B (en) | 2011-05-13 | 2011-05-13 | Method for separating strontium chloride from calcium chloride |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110125792 CN102320643B (en) | 2011-05-13 | 2011-05-13 | Method for separating strontium chloride from calcium chloride |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102320643A CN102320643A (en) | 2012-01-18 |
| CN102320643B true CN102320643B (en) | 2013-10-02 |
Family
ID=45448523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110125792 Expired - Fee Related CN102320643B (en) | 2011-05-13 | 2011-05-13 | Method for separating strontium chloride from calcium chloride |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102320643B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1831251A (en) * | 1927-08-29 | 1931-11-10 | Dow Chemical Co | Method of obtaining strontium from mixed solutions |
| US3495953A (en) * | 1968-06-17 | 1970-02-17 | Dow Chemical Co | Method of separating strontium chloride from mixed solutions using ethanol |
| US3498758A (en) * | 1968-06-17 | 1970-03-03 | Dow Chemical Co | Method of recovering strontium chloride |
| DD290863A5 (en) * | 1989-12-27 | 1991-06-13 | Veb Agrochemie Piesteritz,De | METHOD FOR SEPARATING STRONTIUM CHLORIDE CONCENTRATE FROM CALCIUM CHLORIDE SOLUTIONS |
-
2011
- 2011-05-13 CN CN 201110125792 patent/CN102320643B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1831251A (en) * | 1927-08-29 | 1931-11-10 | Dow Chemical Co | Method of obtaining strontium from mixed solutions |
| US3495953A (en) * | 1968-06-17 | 1970-02-17 | Dow Chemical Co | Method of separating strontium chloride from mixed solutions using ethanol |
| US3498758A (en) * | 1968-06-17 | 1970-03-03 | Dow Chemical Co | Method of recovering strontium chloride |
| DD290863A5 (en) * | 1989-12-27 | 1991-06-13 | Veb Agrochemie Piesteritz,De | METHOD FOR SEPARATING STRONTIUM CHLORIDE CONCENTRATE FROM CALCIUM CHLORIDE SOLUTIONS |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102320643A (en) | 2012-01-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20220194796A1 (en) | Method for producing lithium compound | |
| CN102126738B (en) | Method for producing nitrophosphate fertilizer and co-producing gypsum through decomposing phosphorite with nitric acid | |
| KR101803380B1 (en) | Manufacturing method of lithium carbonate from lithium salt | |
| CN103072963B (en) | Method for producing potassium dihydrogen phosphate through wet-process phosphoric acid | |
| CN101456545B (en) | Method for producing triple superphosphate and co-producing calcium chloride by middle-low grade phosphate rock | |
| WO2017181759A1 (en) | Method for manufacturing anhydrous lithium chloride using lithium-containing wastewater | |
| CN113120875B (en) | Production method of low-impurity wet-process phosphoric acid and high-quality alpha-hemihydrate gypsum | |
| CN103011122B (en) | Method for producing water-soluble potassium ammonium phosphate from wet-process phosphoric acid | |
| JP2019526523A (en) | Method for producing lithium chloride and method for producing lithium carbonate | |
| CN102126740A (en) | Method for producing byproduct gypsum of niter-sulfur-based compound fertilizer by decomposing phosphorite with nitric acid | |
| CN107814370A (en) | Prepare environment-friendly cycle process of phosphorus concentrate and products thereof and application | |
| CN110127731A (en) | A method of battery-level lithium carbonate is directly prepared by lithium phosphate | |
| CN101838006A (en) | Novel method for separating strontium carbonate waste slag acid leaching slurry | |
| CN111732507B (en) | Method for producing L-malic acid and coproducing succinic acid | |
| CN106586990B (en) | With the method for Wet-process Phosphoric Acid Production potassium dihydrogen phosphate | |
| CN102320643B (en) | Method for separating strontium chloride from calcium chloride | |
| CN103910366A (en) | Method for preparing high-purity magnesium oxide by utilizing serpentinite | |
| CN1376635A (en) | Process for preparing phosphoric acid from waste sulfuric acid as by-product of titanium oxide powder by wet method | |
| CN103159195A (en) | Method for preparing potassium dihydrogen phosphate from low-concentration wet-process phosphoric acid | |
| CN104262421B (en) | The technique extracting salicoside from Populus euphratica fallen leaves | |
| CN110272339A (en) | A kind of method of separation and Extraction high-purity malic acid | |
| CN102051481A (en) | Method for separating calcium and magnesium in hydrochloric acid soluble salt system | |
| CN104386659B (en) | A method for producing hypophosphorous acid from phosphorus chemical waste | |
| CN104401953B (en) | Di-ammonium phosphate produced by wet process phosphoric acid and production method of di-ammonium phosphate | |
| CN108299538B (en) | Method for removing isoursodesoxycholic acid in duck bile |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131002 Termination date: 20140513 |