CN112850760A - Method for producing high-purity magnesium oxide from high-concentration seawater - Google Patents
Method for producing high-purity magnesium oxide from high-concentration seawater Download PDFInfo
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- CN112850760A CN112850760A CN202110218195.7A CN202110218195A CN112850760A CN 112850760 A CN112850760 A CN 112850760A CN 202110218195 A CN202110218195 A CN 202110218195A CN 112850760 A CN112850760 A CN 112850760A
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- magnesium oxide
- hot air
- concentration seawater
- producing high
- magnesium
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- 239000000395 magnesium oxide Substances 0.000 title claims abstract description 51
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 title claims abstract description 51
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 title claims abstract description 51
- 239000013535 sea water Substances 0.000 title claims abstract description 39
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229940050906 magnesium chloride hexahydrate Drugs 0.000 claims abstract description 24
- DHRRIBDTHFBPNG-UHFFFAOYSA-L magnesium dichloride hexahydrate Chemical compound O.O.O.O.O.O.[Mg+2].[Cl-].[Cl-] DHRRIBDTHFBPNG-UHFFFAOYSA-L 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000001035 drying Methods 0.000 claims abstract description 23
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 10
- 229960002337 magnesium chloride Drugs 0.000 claims abstract description 10
- 229910001629 magnesium chloride Inorganic materials 0.000 claims abstract description 10
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910000041 hydrogen chloride Inorganic materials 0.000 claims abstract description 9
- 239000013078 crystal Substances 0.000 claims abstract description 6
- 238000001914 filtration Methods 0.000 claims description 5
- 239000012065 filter cake Substances 0.000 claims description 3
- 238000004537 pulping Methods 0.000 claims description 3
- 238000001354 calcination Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 4
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 8
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 8
- 150000003839 salts Chemical class 0.000 description 7
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 6
- 239000001095 magnesium carbonate Substances 0.000 description 6
- 235000014380 magnesium carbonate Nutrition 0.000 description 6
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 6
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 5
- 239000011777 magnesium Substances 0.000 description 5
- 229910052749 magnesium Inorganic materials 0.000 description 5
- 229940091250 magnesium supplement Drugs 0.000 description 5
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 4
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 4
- 235000019341 magnesium sulphate Nutrition 0.000 description 4
- 239000011780 sodium chloride Substances 0.000 description 4
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 3
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 3
- 229910052794 bromium Inorganic materials 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000018044 dehydration Effects 0.000 description 3
- 238000006297 dehydration reaction Methods 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 235000011114 ammonium hydroxide Nutrition 0.000 description 2
- 239000012267 brine Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 2
- 239000000347 magnesium hydroxide Substances 0.000 description 2
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000001103 potassium chloride Substances 0.000 description 2
- 235000011164 potassium chloride Nutrition 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 1
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 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 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 235000012538 ammonium bicarbonate Nutrition 0.000 description 1
- 239000001099 ammonium carbonate Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000013064 chemical raw material Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000002036 drum drying Methods 0.000 description 1
- -1 enamels Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 159000000003 magnesium salts Chemical class 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002351 wastewater 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
- C01F5/02—Magnesia
-
- 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
- C01F5/02—Magnesia
- C01F5/06—Magnesia by thermal decomposition of magnesium compounds
-
- 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 discloses a method for producing high-purity magnesium oxide by high-concentration seawater, which comprises the following steps: drying magnesium chloride hexahydrate separated from high-concentration seawater by adopting anticorrosive drying equipment, and introducing steam along with hot air to remove crystal water from the magnesium chloride hexahydrate and generate basic magnesium chloride; then the magnesium oxide and the hydrochloric acid are produced by decomposing with hot air in an anticorrosive rotary kiln. By adopting the method, the crystal water and the hydrogen chloride in the magnesium chloride hexahydrate are respectively removed by controlling the process parameters to obtain the magnesium oxide, so that the corrosivity of decomposition products can be effectively reduced, the production requirement can be met by adopting the existing anticorrosive material, and the magnesium oxide with higher purity can be obtained. In order to obtain the magnesium oxide with higher purity, the magnesium oxide obtained by calcination is pulped, washed, filtered and then calcined for the second time, so that the magnesium oxide with the purity of more than 99 percent can be obtained.
Description
Technical Field
The invention belongs to the field of resource utilization of high-concentration seawater, and particularly relates to a method for producing high-purity magnesium oxide from high-concentration seawater.
Background
The information in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
Seawater contains rich elements necessary for human life: potassium, sodium, magnesium, bromine, chlorine and the like, wherein sodium chloride is a necessity of human life, and a large part of sodium chloride comes from salt drying in the sun by seawater. In the initial stage of the 21 st century, along with the expansion of the chlor-alkali industry, the demand of raw salt is increased sharply, the price of bromine in the later stage is increased sharply, the yield is also improved greatly, the brine balance is broken after the salt and bromine co-production, and a large amount of brine after the salt is dried is discharged outside, thereby causing serious damage to the offshore ecology.
China is a country seriously lack of water resources, particularly the economic development of coastal cities is seriously limited by fresh water resources, seawater is an important component of the water resources, and the effective utilization of the seawater is one of important measures for solving the water resource crisis in China. With the implementation of large-scale seawater desalination engineering, the by-product of the method discharges a large amount of high-salt and high-concentration seawater, and the influence on the seawater ecology is also obvious.
Magnesium oxide is an important chemical raw material, and is mainly used in the industries of ceramics, enamels, refractory materials and silicon steel and for producing various magnesium salts. In industry, the production process is different according to different requirements of magnesium oxide, for example, the magnesium oxide is produced by calcining magnesite, namely light-burned magnesium, the content of the magnesium oxide is only 80-90%, and the magnesium oxide is mainly used for producing magnesium sulfate, desulfurizing smoke, producing magnesium gel materials and magnesite with lower content. The purity of magnesite produced by using seawater as a raw material can reach more than 96 percent, and various salts are mixed together due to large amount of waste water, so that the magnesite is difficult to treat and has serious environmental pollution.
The existing technology for producing magnesium oxide by using high-concentration seawater is to add liquid alkali or ammonia water into the high-concentration seawater to produce magnesium hydroxide, and then to produce magnesium oxide by filtering, washing and calcining. Or adding ammonium bicarbonate and ammonia water into high-concentration seawater to generate basic magnesium carbonate, and then filtering, washing and calcining to produce the magnesium oxide. In the two processes, the filtrate obtained after filtering the magnesium hydroxide or the basic magnesium carbonate is waste liquor of mixed salt, and is difficult to separate and high in cost.
The magnesium resource in the seawater is rich, and the magnesium content in the seawater is as high as 50kg/m especially in high-concentration seawater3In the form of magnesium chloride or magnesium sulfate, the magnesium chloride hexahydrate has been separated from high-concentration seawater in the prior art, the yield is high, and the magnesium chloride hexahydrate can generate magnesium oxide through pyrolysis. However, because hydrogen chloride is generated in the decomposition process of magnesium chloride hexahydrate and simultaneously crystallized water is separated into free water, the hydrogen chloride-containing water vapor has strong corrosivity at high temperature, and the corrosion resistance of general materials is difficult to meet the production requirement, the process has low cost but has no large-scale industrial production.
Disclosure of Invention
Aiming at the problems, the invention provides a method for producing high-purity magnesium oxide by using high-concentration seawater.
To solve the above technical problem, one or more of the following embodiments of the present invention provide the following technical solutions:
a method for producing high-purity magnesium oxide by high-concentration seawater comprises the following steps:
drying magnesium chloride hexahydrate separated from high-concentration seawater by adopting anticorrosive drying equipment, and introducing a proper amount of steam along with hot air to remove crystal water from the magnesium chloride hexahydrate and generate basic magnesium chloride; then the magnesium oxide and the hydrochloric acid are produced by decomposing with hot air in an anticorrosive rotary kiln.
Compared with the prior art, one or more technical schemes of the invention have the following beneficial effects:
by adopting the method, the crystal water and the hydrogen chloride in the magnesium chloride hexahydrate are respectively removed by controlling the process parameters to obtain the magnesium oxide, so that the corrosivity of decomposition products can be effectively reduced, the production requirement can be met by adopting the existing anticorrosive material, the magnesium oxide with higher purity can be obtained, and the quality of the magnesium oxide product is effectively improved.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
A method for producing high-purity magnesium oxide by high-concentration seawater comprises the following steps:
drying magnesium chloride hexahydrate separated from high-concentration seawater by adopting anticorrosive drying equipment, and introducing steam along with hot air to remove crystal water from the magnesium chloride hexahydrate and generate basic magnesium chloride; then the magnesium oxide and the hydrochloric acid are produced by decomposing with hot air in an anticorrosive rotary kiln.
In some embodiments, the corrosion-resistant drying apparatus is a corrosion-resistant ebullated fluidized bed or drum drying apparatus.
In some embodiments, during the drying process, steam is introduced into the drying apparatus in an amount of 5% to 30% of the amount of magnesium chloride hexahydrate.
In some embodiments, the magnesium chloride hexahydrate is dried in hot air at 250-300 ℃ for 1-2 hours.
And in the drying process, the step of intermittently introducing steam into the drying equipment, wherein a proper amount of steam is introduced along with hot air to ensure that the magnesium chloride is decomposed into basic magnesium chloride and water required by hydrogen chloride.
In some embodiments, the decomposition temperature is 600-900 ℃, and the time of hot air decomposition is 2-3 h.
The purity of the obtained magnesium oxide is more than 90 percent.
Further, hydrogen chloride obtained by the hot air decomposition is absorbed by water to produce hydrochloric acid.
In some embodiments, the method further comprises the steps of pulping the magnesium oxide obtained by the primary hot air decomposition by using water, filtering, removing soluble salt impurities, and secondarily decomposing the filter cake in hot air at the temperature of 500-750 ℃ to further purify the magnesium oxide. The purity of the prepared magnesium oxide can reach more than 99 percent.
Furthermore, the mass ratio of the magnesium oxide to the water is 1:1-1: 5.
Example 1
10000 parts of high-concentration seawater (containing 1400 parts of magnesium chloride, 750 parts of magnesium sulfate, 200 parts of potassium chloride and 750 parts of sodium chloride) and obtaining 3280 parts of magnesium chloride hexahydrate by separation.
Magnesium chloride hexahydrate is dehydrated by hot air at 280-350 ℃, 150 parts of steam is introduced into drying equipment along with hot air in the hot air dehydration process, the dehydrated water enters a spray tower for cooling and absorption, and water and a small amount of decomposed hydrogen chloride produce hydrochloric acid.
And (3) introducing 750-800 ℃ hot air into the dehydrated basic magnesium chloride in an anticorrosive rotary kiln, staying for 2 hours, and discharging the hot air into a magnesium chloride hexahydrate drying system through an outlet. 625 parts of magnesium oxide with a purity of 93.62% were produced.
Example 2
20000 parts of high-concentration seawater (containing 2700 parts of magnesium chloride, 1530 parts of magnesium sulfate, 412 parts of potassium chloride and 1430 parts of sodium chloride) are separated to obtain 6058 parts of magnesium chloride hexahydrate.
Dehydrating magnesium chloride hexahydrate by hot air at 250-340 ℃ for 2 hours, introducing 270 parts of steam twice along with the hot air, cooling and absorbing the dehydrated water by a spray tower, and producing dilute hydrochloric acid by water and a small amount of decomposed hydrogen chloride.
Introducing hot air with the temperature of 800 ℃ of 700-. 1232 parts of magnesium oxide is produced.
2000 portions of water are used for pulping, washing and filter pressing, and the filter cake is calcined for 1.5 hours in a rotary kiln at 800 ℃ and 600 to obtain 1126 portions of magnesium oxide with the purity of 99.16 percent.
Example 3
The feeding and operation were the same as in example 1, and steam was not introduced into the hot air during the dehydration and drying of magnesium chloride hexahydrate, thereby obtaining 685 parts of magnesium oxide with a purity of 84.56%.
Example 4
The feeding and operation were the same as in example 2, and steam was not introduced into the hot air during the dehydration of the magnesium chloride hexahydrate to obtain 1048 parts of magnesium oxide with a purity of 99.07%.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A method for producing high-purity magnesium oxide by high-concentration seawater is characterized by comprising the following steps: the method comprises the following steps:
drying magnesium chloride hexahydrate separated from high-concentration seawater by adopting anticorrosive drying equipment, and introducing steam along with hot air to remove crystal water from the magnesium chloride hexahydrate and generate basic magnesium chloride; then the magnesium oxide and the hydrochloric acid are produced by decomposing with hot air in an anticorrosive rotary kiln.
2. The method for producing high purity magnesium oxide from high concentration seawater according to claim 1, wherein: the anticorrosive drying equipment is anticorrosive fluidized bed or roller drying equipment.
3. The method for producing high purity magnesium oxide from high concentration seawater according to claim 2, wherein: the magnesium chloride hexahydrate is dried in hot air at the temperature of 250-350 ℃.
4. The method for producing high purity magnesium oxide from high concentration seawater according to claim 3, wherein: in the drying process, the drying time is 1-2 h.
5. The method for producing high purity magnesium oxide from high concentration seawater according to claim 4, wherein: in the drying process, the amount of the steam introduced into the drying equipment is 5 to 30 percent of the amount of the magnesium chloride hexahydrate.
6. The method for producing high purity magnesium oxide from high concentration seawater according to claim 1, wherein: the temperature of the hot air decomposition is 600-900 ℃.
7. The method for producing high purity magnesium oxide from high concentration seawater according to claim 6, wherein: the time for decomposing the hot air is 2-3 h.
8. The method for producing high purity magnesium oxide from high concentration seawater according to claim 6, wherein: the hydrogen chloride obtained by the decomposition of the hot air is absorbed by water to produce hydrochloric acid.
9. The method for producing high purity magnesium oxide from high concentration seawater according to claim 1, wherein: also comprises the steps of pulping the magnesium oxide obtained by the primary hot air decomposition by water, filtering, secondarily decomposing a filter cake in hot air at the temperature of 500-750 ℃, and further purifying the magnesium oxide.
10. The method for producing high purity magnesium oxide from high concentration seawater according to claim 8, wherein: the mass ratio of the magnesium oxide to the water is 1:1-1: 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110218195.7A CN112850760A (en) | 2021-02-26 | 2021-02-26 | Method for producing high-purity magnesium oxide from high-concentration seawater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110218195.7A CN112850760A (en) | 2021-02-26 | 2021-02-26 | Method for producing high-purity magnesium oxide from high-concentration seawater |
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|---|---|
| CN112850760A true CN112850760A (en) | 2021-05-28 |
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| CN202110218195.7A Pending CN112850760A (en) | 2021-02-26 | 2021-02-26 | Method for producing high-purity magnesium oxide from high-concentration seawater |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1431908A (en) * | 1973-03-12 | 1976-04-14 | Leipzig Chemieanlagen | Process for obtaining hydrogen chloride and magnesium oxide |
| CN101117225A (en) * | 2007-07-17 | 2008-02-06 | 陈兆华 | Process for producing high-purity magnesium oxide and lithium salt by using salt lake old brine |
| CN101624198A (en) * | 2009-08-07 | 2010-01-13 | 华东理工大学 | Method for preparing basic magnesium chloride and magnesium oxide by pyrolyzing bischofite |
| CN104773744A (en) * | 2014-01-15 | 2015-07-15 | 中国科学院过程工程研究所 | Method for preparing high purity magnesium oxide from old brine |
| CN110015671A (en) * | 2019-04-12 | 2019-07-16 | 常州工学院 | A kind of preparation method of high purity magnesium oxide |
-
2021
- 2021-02-26 CN CN202110218195.7A patent/CN112850760A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1431908A (en) * | 1973-03-12 | 1976-04-14 | Leipzig Chemieanlagen | Process for obtaining hydrogen chloride and magnesium oxide |
| CN101117225A (en) * | 2007-07-17 | 2008-02-06 | 陈兆华 | Process for producing high-purity magnesium oxide and lithium salt by using salt lake old brine |
| CN101624198A (en) * | 2009-08-07 | 2010-01-13 | 华东理工大学 | Method for preparing basic magnesium chloride and magnesium oxide by pyrolyzing bischofite |
| CN104773744A (en) * | 2014-01-15 | 2015-07-15 | 中国科学院过程工程研究所 | Method for preparing high purity magnesium oxide from old brine |
| CN110015671A (en) * | 2019-04-12 | 2019-07-16 | 常州工学院 | A kind of preparation method of high purity magnesium oxide |
Non-Patent Citations (1)
| Title |
|---|
| 宋明礼等: "热解法由察尔汉盐湖水氯镁石制取氧化镁及盐酸", 《盐湖科技资料》 * |
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