CN110980781A - Method for preparing high-purity magnesium sulfate - Google Patents
Method for preparing high-purity magnesium sulfate Download PDFInfo
- Publication number
- CN110980781A CN110980781A CN201911278071.7A CN201911278071A CN110980781A CN 110980781 A CN110980781 A CN 110980781A CN 201911278071 A CN201911278071 A CN 201911278071A CN 110980781 A CN110980781 A CN 110980781A
- Authority
- CN
- China
- Prior art keywords
- magnesium sulfate
- purity
- phosphoric acid
- magnesium oxide
- purity magnesium
- 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.)
- Pending
Links
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 title claims abstract description 108
- 235000019341 magnesium sulphate Nutrition 0.000 title claims abstract description 54
- 229910052943 magnesium sulfate Inorganic materials 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 18
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 24
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 17
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 17
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000006243 chemical reaction Methods 0.000 claims abstract description 13
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 13
- 238000003756 stirring Methods 0.000 claims description 11
- 238000002425 crystallisation Methods 0.000 claims description 9
- 230000008025 crystallization Effects 0.000 claims description 9
- 239000012153 distilled water Substances 0.000 claims description 9
- 239000000706 filtrate Substances 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000012752 auxiliary agent Substances 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims 1
- 239000002994 raw material Substances 0.000 abstract description 8
- 238000002360 preparation method Methods 0.000 abstract description 2
- 239000003153 chemical reaction reagent Substances 0.000 abstract 1
- 238000009776 industrial production Methods 0.000 abstract 1
- 238000005580 one pot reaction Methods 0.000 abstract 1
- 238000007670 refining Methods 0.000 abstract 1
- 238000001914 filtration Methods 0.000 description 10
- 239000012535 impurity Substances 0.000 description 7
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 6
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 6
- 229910001424 calcium ion Inorganic materials 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 238000001816 cooling Methods 0.000 description 5
- 239000003814 drug Substances 0.000 description 5
- 235000013305 food Nutrition 0.000 description 5
- 238000005406 washing Methods 0.000 description 5
- 239000011575 calcium Substances 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 239000006260 foam Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 3
- 229910052785 arsenic Inorganic materials 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- WRUGWIBCXHJTDG-UHFFFAOYSA-L magnesium sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Mg+2].[O-]S([O-])(=O)=O WRUGWIBCXHJTDG-UHFFFAOYSA-L 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 206010003119 arrhythmia Diseases 0.000 description 2
- 230000006793 arrhythmia Effects 0.000 description 2
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 2
- 159000000007 calcium salts Chemical class 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- -1 iron ions Chemical class 0.000 description 2
- 229940061634 magnesium sulfate heptahydrate Drugs 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 206010002383 Angina Pectoris Diseases 0.000 description 1
- 206010004663 Biliary colic Diseases 0.000 description 1
- 206010007559 Cardiac failure congestive Diseases 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 241000208011 Digitalis Species 0.000 description 1
- 206010019280 Heart failures Diseases 0.000 description 1
- 208000031226 Hyperlipidaemia Diseases 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- 240000004808 Saccharomyces cerevisiae Species 0.000 description 1
- 206010039897 Sedation Diseases 0.000 description 1
- 206010043376 Tetanus Diseases 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000001773 anti-convulsant effect Effects 0.000 description 1
- 239000001961 anticonvulsive agent Substances 0.000 description 1
- 229960003965 antiepileptics Drugs 0.000 description 1
- 201000009361 ascariasis Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000036772 blood pressure Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000001506 calcium phosphate Substances 0.000 description 1
- 229910000389 calcium phosphate Inorganic materials 0.000 description 1
- 235000011010 calcium phosphates Nutrition 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 230000035568 catharsis Effects 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 239000008845 cholagoga Substances 0.000 description 1
- 229940124571 cholagogue Drugs 0.000 description 1
- 201000001352 cholecystitis Diseases 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001784 detoxification Methods 0.000 description 1
- 235000015872 dietary supplement Nutrition 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 229910052564 epsomite Inorganic materials 0.000 description 1
- 235000013373 food additive Nutrition 0.000 description 1
- 239000002778 food additive Substances 0.000 description 1
- 230000000887 hydrating effect Effects 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 238000001990 intravenous administration Methods 0.000 description 1
- 238000010253 intravenous injection Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000013332 literature search Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- LPUQAYUQRXPFSQ-DFWYDOINSA-M monosodium L-glutamate Chemical compound [Na+].[O-]C(=O)[C@@H](N)CCC(O)=O LPUQAYUQRXPFSQ-DFWYDOINSA-M 0.000 description 1
- 235000013923 monosodium glutamate Nutrition 0.000 description 1
- 239000004223 monosodium glutamate Substances 0.000 description 1
- 208000010125 myocardial infarction Diseases 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000035935 pregnancy Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000036280 sedation Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F5/00—Compounds of magnesium
- C01F5/40—Magnesium sulfates
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
本发明公开了一种制备高纯度硫酸镁的方法。该方法以氧化镁和硫酸为原料，以磷酸为去杂试剂，经一步反应制得高纯度硫酸镁，省去了精制环节。本发明提供的制备方法所用原料廉价易得，操作简单，反应条件温和，无苛刻反应条件，所得产品收率和纯度均很高，适合工业化生产。The invention discloses a method for preparing high-purity magnesium sulfate. In the method, magnesium oxide and sulfuric acid are used as raw materials, and phosphoric acid is used as an impurity-removing reagent, and high-purity magnesium sulfate is prepared by one-step reaction, and the refining process is omitted. The raw materials used in the preparation method provided by the invention are cheap and easy to obtain, the operation is simple, the reaction conditions are mild, no harsh reaction conditions are required, and the obtained product has high yield and purity, and is suitable for industrial production.
Description
Technical Field
The invention belongs to the field of food and medicine, and particularly relates to application of high-purity magnesium sulfate in the field of food and medicine.
Background
Magnesium sulfate is commonly referred to as magnesium sulfate heptahydrate, also known as thiopicrin, bitter salt, epsomite. It can be widely applied to the fields of food, medicine and the like. In the food field, magnesium sulfate is used for producing products such as monosodium glutamate, yeast, salt and the like; can also be used as food additive as nutritional supplement. In clinical application, magnesium sulfate can be used for catharsis, detoxification, cholagogue, and treatment of cholecystitis and biliary colic. When used as magnesium ion supplement in vivo, it can be used for preventing and treating toxic arrhythmia and other arrhythmia of digitalis; can be used for treating hyperlipidemia, congestive heart failure, angina pectoris, and myocardial infarction; can be used for sedation, anticonvulsant and lowering blood pressure; intravenous injection or intravenous drip can be used for treating biliary ascariasis, tetanus, preterm pregnancy, etc.
The quality index of the industrial grade magnesium sulfate is that the magnesium sulfate is more than or equal to 99.5 percent, the pH (5w/v percent solution) is between 5 and 9, and the content of iron is not more than 0.0015 percent; the chlorine content (Cl) is not more than 0.015 percent; heavy metal (Pb) no more than 0.0008%; the arsenic content (As) is not more than 0.0002%; the calcium content (Ca) is not more than 0.05%; the water-insoluble matter is not more than 0.01%. The high-purity magnesium sulfate is a substance with the content of the magnesium sulfate of more than 99.9 percent, the quality index is far higher than that of industrial-grade magnesium sulfate, the application range is wider than that of the industrial-grade magnesium sulfate, and the magnesium sulfate used in the field of food and medicine is often the high-purity magnesium sulfate. In the process of preparing the high-purity magnesium sulfate, metal substances such as iron ions, lead ions, arsenic ions and the like are relatively easy to remove, and calcium and magnesium are homologous elements and have very similar chemical properties, so that in the purification process, impurity calcium salt is difficult to remove from a finished product, and the content of calcium in the product exceeds the standard. Especially, the calcium ion content of magnesium sulfate used in medicine is not more than 0.02%.
The literature search shows that the high-purity magnesium sulfate is generally prepared by reacting industrial magnesium oxide or high-purity magnesium oxide with sulfuric acid and then removing impurities by different methods; or the industrial-grade magnesium sulfate is purified to obtain the high-purity magnesium sulfate. For example, the Chinese patent publication CN101885498A controls the purity of magnesium sulfate by reacting high-purity magnesium oxide with sulfuric acid, adjusting pH, and concentrating the filtrate to a certain relative density. Chinese patent publication CN107935003A provides a method for preparing high purity magnesium sulfate from magnesium sulfate waste. The method mainly comprises the steps of roasting magnesium sulfate waste at high temperature, hydrating, and then concentrating and crystallizing twice to prepare the high-purity magnesium sulfate. Chinese patent publication CN103058235A uses hydrofluoric acid to precipitate calcium ions in magnesium sulfate as impurities, and obtains high-purity magnesium sulfate. In addition, the high-purity magnesium sulfate is prepared by adopting multi-stage series equipment such as a majun and the like through multi-step recrystallization, decoloration and washing; the method is characterized in that the high-purity magnesium sulfate is produced by using industrial magnesium sulfate heptahydrate, and the high-purity magnesium sulfate is obtained by adding an alkaline auxiliary agent, activated carbon and the like to remove impurities and decolor.
The method related to the patent literature has a complex preparation process, and the problem of calcium salt impurities in the prepared magnesium sulfate is not effectively solved. Chinese patent publication CN103058235A uses hydrofluoric acid to precipitate calcium ions in magnesium sulfate as impurities to obtain high-purity magnesium sulfate, but hydrofluoric acid belongs to a highly corrosive liquid and has great danger in the processes of production, storage and use.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the method for preparing the high-purity magnesium sulfate, which has the advantages of simple process and mild reaction conditions, and can effectively reduce the content of calcium ions in the magnesium sulfate product.
In order to achieve the purpose of the invention, the invention adopts the following technical scheme:
adding a certain proportion of magnesium oxide and distilled water into a reactor, stirring, and slowly dropwise adding concentrated sulfuric acid to obtain a magnesium sulfate solution with the pH value of 5-6; then heating to 70-80 ℃; adding phosphoric acid and active carbon in proportion, keeping the temperature, stirring and reacting for 0.5-2 hours; filtering; and cooling the filtrate, crystallizing, and filtering to obtain the high-purity magnesium sulfate.
In the technical scheme, the mass ratio of the magnesium oxide to the distilled water is 1: 4-6; the mass ratio of the magnesium oxide to the phosphoric acid is 20-30: 1. Compared with the prior art, the invention has the following advantages:
1) the solubility of calcium phosphate in water is very low, the pKsp value is 28.68, and the solubility product Ksp is 2.07 x 10-29In the technical scheme of the invention, a proper amount of phosphoric acid is added into the reaction system, which is beneficial to forming precipitate and separating out calcium ions from the reaction system. The finished magnesium sulfate prepared by the technical scheme meets the quality standard of magnesium sulfate collected in the 2015 edition of Chinese pharmacopoeia, and particularly, the content of calcium ions is lower than the limit of the quality standard.
2) The invention relates to a method for preparing high-purity magnesium sulfate, wherein the used raw material magnesium oxide does not need to have high-purity grade, and the content of the magnesium oxide in the raw material is higher than 92.0%.
3) The invention relates to a method for preparing high-purity magnesium sulfate, which has simple reaction impurity removal steps and mild reaction conditions and is particularly suitable for industrial scale production. And meanwhile, nontoxic carbon dioxide is released in the reaction process, and the waste liquid is mother liquid containing magnesium sulfate, so that the waste liquid can be repeatedly used, and the requirements of energy conservation and emission reduction are met.
Detailed Description
The present invention is further illustrated by the following specific examples, which are intended to be illustrative, not limiting and are not intended to limit the scope of the invention.
Example 1
Adding 2 kg of raw material magnesium oxide into a reactor, adding 10 liters of distilled water, starting stirring, slowly dripping concentrated sulfuric acid after the materials are dispersed into paste, and controlling the adding speed to avoid foam overflow. And when the pH value of the reaction system is 5, stopping adding sulfuric acid, heating to 80 ℃, adding 67 g of phosphoric acid and 60 g of activated carbon, stirring for reacting for 0.5 hour, filtering while hot, naturally cooling the filtrate for crystallization, filtering for crystallization, washing with water, and drying to obtain the high-purity magnesium sulfate.
Example 2
Adding 2 kg of raw material magnesium oxide into a reactor, adding 12 liters of distilled water, starting stirring, slowly dripping concentrated sulfuric acid after the materials are dispersed into paste, and controlling the adding speed to avoid foam overflow. And when the pH value of the reaction system is 5, stopping adding sulfuric acid, heating to 70 ℃, adding 77 g of phosphoric acid and 60 g of activated carbon, stirring for reacting for 1 hour, filtering while hot, naturally cooling the filtrate for crystallization, filtering for crystallization, washing with water, and drying to obtain the high-purity magnesium sulfate.
Example 3
Adding 2 kg of raw material magnesium oxide into a reactor, adding 8 liters of distilled water, starting stirring, slowly dripping concentrated sulfuric acid after the materials are dispersed into paste, and controlling the adding speed to avoid foam overflow. And when the pH value of the reaction system is 5, stopping adding sulfuric acid, heating to 80 ℃, adding 87 g of phosphoric acid and 60 g of activated carbon, stirring for reacting for 1.5 hours, filtering while hot, naturally cooling the filtrate for crystallization, filtering for crystallization, washing with water, and drying to obtain the high-purity magnesium sulfate.
Example 4
Adding 2 kg of raw material magnesium oxide into a reactor, adding 12 liters of distilled water, starting stirring, slowly dripping concentrated sulfuric acid after the materials are dispersed into paste, and controlling the adding speed to avoid foam overflow. And when the pH value of the reaction system is 6, stopping adding the sulfuric acid, heating to 70 ℃, adding 100 g of phosphoric acid and 60 g of activated carbon, stirring for reacting for 2 hours, filtering while hot, naturally cooling the filtrate for crystallization, filtering for crystallization, washing with water, and drying to obtain the high-purity magnesium sulfate.
The result of the detection
The magnesium sulfate finished product of the embodiment of the invention is detected according to a detection method of magnesium sulfate in the second part of Chinese pharmacopoeia 2015 edition. The detection results are as follows:
| detecting items | Chinese pharmacopoeia 2015 edition | Example 1 | Example 2 | Example 3 | Example 4 |
| Traits | Colorless crystals | Qualified | Qualified | Qualified | Qualified |
| Content (wt.) | 99.50％ | 99.60％ | 99.70％ | 99.80％ | 99.70％ |
| pH value | Should comply with the regulations | Qualified | Qualified | Qualified | Qualified |
| Clarity test | Should comply with the regulations | Qualified | Qualified | Qualified | Qualified |
| Chloride compound | 0.01％ | 0.01％ | 0.01％ | 0.01％ | 0.00％ |
| Iron | 0.00％ | 0.00％ | 0.00％ | 0.00％ | 0.00％ |
| Calcium carbonate | 0.02％ | 0.01％ | 0.01％ | 0.01％ | 0.01％ |
| Zinc | Should comply with the regulations | Qualified | Qualified | Qualified | Qualified |
| Heavy metals | 0.00％ | 0.00％ | 0.00％ | 0.00％ | 0.00％ |
| Arsenic (As) | 0.00％ | 0.00％ | 0.00％ | 0.00％ | 0.00％ |
| Ignition weightlessness | 48.0-52.0％ | 51.10％ | 48.90％ | 49.60％ | 50.60％ |
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911278071.7A CN110980781A (en) | 2019-12-12 | 2019-12-12 | Method for preparing high-purity magnesium sulfate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911278071.7A CN110980781A (en) | 2019-12-12 | 2019-12-12 | Method for preparing high-purity magnesium sulfate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110980781A true CN110980781A (en) | 2020-04-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911278071.7A Pending CN110980781A (en) | 2019-12-12 | 2019-12-12 | Method for preparing high-purity magnesium sulfate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110980781A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102115060A (en) * | 2010-12-30 | 2011-07-06 | 何云 | Method for preparing phosphate and mixed product of sodium phosphate and magnesium sulfate with manganese-containing waste liquid |
| CN103058235A (en) * | 2013-01-22 | 2013-04-24 | 天津市科密欧化学试剂有限公司 | Method of removing calcium with magnesium sulfate and high-purity magnesium sulfate |
| CN107364879A (en) * | 2017-06-29 | 2017-11-21 | 中国恩菲工程技术有限公司 | The method that magnesium elements and calcium constituent are reclaimed from Adlerika |
| CN107739042A (en) * | 2017-11-22 | 2018-02-27 | 中国科学院青海盐湖研究所 | The method that high-purity magnesium sulfate is prepared by magnesium sulfate discarded object |
| CN109867297A (en) * | 2017-12-05 | 2019-06-11 | 南风化工集团股份有限公司 | A method of with calcium and magnesium in phosphate removal sodium sulphate type bittern |
-
2019
- 2019-12-12 CN CN201911278071.7A patent/CN110980781A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102115060A (en) * | 2010-12-30 | 2011-07-06 | 何云 | Method for preparing phosphate and mixed product of sodium phosphate and magnesium sulfate with manganese-containing waste liquid |
| CN103058235A (en) * | 2013-01-22 | 2013-04-24 | 天津市科密欧化学试剂有限公司 | Method of removing calcium with magnesium sulfate and high-purity magnesium sulfate |
| CN107364879A (en) * | 2017-06-29 | 2017-11-21 | 中国恩菲工程技术有限公司 | The method that magnesium elements and calcium constituent are reclaimed from Adlerika |
| CN107739042A (en) * | 2017-11-22 | 2018-02-27 | 中国科学院青海盐湖研究所 | The method that high-purity magnesium sulfate is prepared by magnesium sulfate discarded object |
| CN109867297A (en) * | 2017-12-05 | 2019-06-11 | 南风化工集团股份有限公司 | A method of with calcium and magnesium in phosphate removal sodium sulphate type bittern |
Non-Patent Citations (1)
| Title |
|---|
| 傅希贤等编: "《大学化学：少学时》", 30 September 2015, 天津大学出版社 * |
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