CN103708509B - A kind of spray-drying process produces the method for magnesium sulfate monohydrate - Google Patents
A kind of spray-drying process produces the method for magnesium sulfate monohydrate Download PDFInfo
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- CN103708509B CN103708509B CN201310715085.7A CN201310715085A CN103708509B CN 103708509 B CN103708509 B CN 103708509B CN 201310715085 A CN201310715085 A CN 201310715085A CN 103708509 B CN103708509 B CN 103708509B
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- magnesium sulfate
- monohydrate
- drying
- rotating disk
- tower
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- LFCFXZHKDRJMNS-UHFFFAOYSA-L magnesium;sulfate;hydrate Chemical compound O.[Mg+2].[O-]S([O-])(=O)=O LFCFXZHKDRJMNS-UHFFFAOYSA-L 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 38
- 229940076230 magnesium sulfate monohydrate Drugs 0.000 title claims abstract description 34
- 238000001694 spray drying Methods 0.000 title claims abstract description 18
- 238000001035 drying Methods 0.000 claims abstract description 52
- 238000001816 cooling Methods 0.000 claims abstract description 41
- 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 claims abstract description 29
- 229940061634 magnesium sulfate heptahydrate Drugs 0.000 claims abstract description 29
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 10
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000006243 chemical reaction Methods 0.000 claims abstract description 10
- 238000002425 crystallisation Methods 0.000 claims abstract description 7
- 239000006227 byproduct Substances 0.000 claims abstract description 5
- 238000009413 insulation Methods 0.000 claims abstract description 5
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 5
- 239000000843 powder Substances 0.000 claims abstract description 5
- 238000003756 stirring Methods 0.000 claims abstract description 5
- 239000000126 substance Substances 0.000 claims abstract description 5
- 238000007710 freezing Methods 0.000 claims description 8
- 230000008014 freezing Effects 0.000 claims description 8
- 238000010792 warming Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000002860 competitive effect Effects 0.000 abstract description 3
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 6
- 239000011777 magnesium Substances 0.000 description 6
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 229910052749 magnesium Inorganic materials 0.000 description 4
- 229940091250 magnesium supplement Drugs 0.000 description 4
- 102000004190 Enzymes Human genes 0.000 description 3
- 108090000790 Enzymes Proteins 0.000 description 3
- 239000003337 fertilizer Substances 0.000 description 3
- 229960003390 magnesium sulfate Drugs 0.000 description 3
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 3
- 235000019341 magnesium sulphate Nutrition 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- 229930002875 chlorophyll Natural products 0.000 description 2
- 235000019804 chlorophyll Nutrition 0.000 description 2
- ATNHDLDRLWWWCB-AENOIHSZSA-M chlorophyll a Chemical compound C1([C@@H](C(=O)OC)C(=O)C2=C3C)=C2N2C3=CC(C(CC)=C3C)=[N+]4C3=CC3=C(C=C)C(C)=C5N3[Mg-2]42[N+]2=C1[C@@H](CCC(=O)OC\C=C(/C)CCC[C@H](C)CCC[C@H](C)CCCC(C)C)[C@H](C)C2=C5 ATNHDLDRLWWWCB-AENOIHSZSA-M 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 102000004169 proteins and genes Human genes 0.000 description 2
- 108090000623 proteins and genes Proteins 0.000 description 2
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 239000002671 adjuvant Substances 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 150000001413 amino acids Chemical class 0.000 description 1
- 150000001720 carbohydrates Chemical class 0.000 description 1
- 235000014633 carbohydrates Nutrition 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000003608 fece Anatomy 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000010871 livestock manure Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 235000012054 meals Nutrition 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 230000000050 nutritive effect Effects 0.000 description 1
- 230000029553 photosynthesis Effects 0.000 description 1
- 238000010672 photosynthesis Methods 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 239000000273 veterinary drug Substances 0.000 description 1
Landscapes
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The present invention relates to the production field of magnesium sulfate monohydrate, particularly relate to a kind of method that spray-drying process produces magnesium sulfate monohydrate, comprise the following steps: chemical byproduct sulfuric acid and magnesia powder are evenly joined successively lower stirring reaction in reaction mixer, obtain thick magnesium sulfate heptahydrate; Being filtered by thick magnesium sulfate heptahydrate delivers in drying tower, in drying tower, blast warm air at twice, and the rotating speed of the temperature controlled respectively in drying tower and rotating disk carries out drying, obtains crude monohydrate magnesium sulfate; Crude monohydrate magnesium sulfate is delivered to crystallisation by cooling in cooling tower, adopt gradient cooling, insulation, gradient increased temperature, continue gradient cooling method and crude monohydrate magnesium sulfate is lowered the temperature step by step, until the temperature in cooling tower is 30 ~ 35 DEG C, obtain the magnesium sulfate monohydrate refined.Method of the present invention shortens the time of drying of magnesium sulfate monohydrate, reduces labour intensity, produces a kind of superior in quality stable, cheap, the commercially magnesium sulfate monohydrate of competitive superiority.
Description
Technical field
The present invention relates to the production field of magnesium sulfate monohydrate, particularly relate to a kind of method that spray-drying process produces magnesium sulfate monohydrate.
Background technology
Magnesium sulfate is a kind of two nutrient fertilizer, and sulphur, magnesium, as the moderate-element of crop, are the 5th, the 6th liang of large nutritive elements of crop, can are not only crop increase yield, but also can improve the taste of fruit.Magnesium is the component of chlorophyll and pigment, and be metallic element unique in chlorophyll molecule, magnesium can promote photosynthesis, promotes the formation of carbohydrate, protein, fat.Magnesium is the activator of hundreds of enzyme, also participates in the formation of some enzymes, promotes the metabolism done in object.Sulphur is that synthesizing amino acid in crop, protein, Mierocrystalline cellulose and enzyme are necessary.Magnesium sulfate, as fertilizer, can directly be used as base manure, topdress and foliage fertilizer use, can be used alone, also can be used as the blending of one of component and use.
On market, commodity magnesium sulfate mostly is magnesium sulfate heptahydrate (MgSO
47H
2o), Mg content low (only having 9.7%), product easy caking stored for a long time, not easily mixes with unclassified stores, so use magnesium sulfate monohydrate (MgSO in a lot of occasion
4h
2o), magnesium sulfate monohydrate Mg content higher (17.6%), meal, does not stored for a long timely lump, and easily mix with unclassified stores, current magnesium sulfate monohydrate has replaced the material such as glucose, starch to be widely used in veterinary drug adjuvant, wide market.The production technique of existing magnesium sulfate monohydrate has two kinds, and one is that high temperature (80 DEG C) exsiccation is dried; Two is dry with magnesium sulfate heptahydrate direct heating.These two kinds explained hereafter cost is high, labour intensity is large, the production cycle is long.
Summary of the invention
For above-mentioned technical problem, the present invention has designed and developed a kind of method that spray-drying process produces magnesium sulfate monohydrate, and object is the time of drying shortening magnesium sulfate monohydrate, reduce labour intensity, produce a kind of superior in quality stable, cheap, the commercially magnesium sulfate monohydrate of competitive superiority.
Technical scheme provided by the invention is:
Spray-drying process produces a method for magnesium sulfate monohydrate, comprises the following steps:
Step one, chemical byproduct sulfuric acid and magnesia powder are evenly joined successively in reaction mixer, at 85 ~ 100 DEG C, stirring reaction 2 ~ 5 hours, obtains thick magnesium sulfate heptahydrate;
Step 2, described thick magnesium sulfate heptahydrate filtered and delivers in drying tower, in drying tower with flow velocity for 20 ~ 25m
3/ s blasts warm air, and the temperature controlled in drying tower is 320 ~ 350 DEG C, and the rotating speed of the rotating disk in drying tower is 6 ~ 8 revolutions per seconds, after dry 1 ~ 3 hour, regulate the temperature in drying tower to be 170 ~ 180 DEG C, the rotating speed of rotating disk is 2 ~ 4 revolutions per seconds, and blast flow velocity is 5 ~ 10m simultaneously
3the warm air of/s, dry 30 ~ 50min, obtains crude monohydrate magnesium sulfate;
Step 3, described crude monohydrate magnesium sulfate is delivered to crystallisation by cooling in cooling tower, adopt gradient cooling method to lower the temperature step by step to crude monohydrate magnesium sulfate, in 20min cooling tower, temperature reduces by 50 DEG C, simultaneously in cooling tower with flow velocity for 15 ~ 18m
3/ s blasts freezing air, and when the temperature in cooling tower is down to 100 DEG C, insulation 20 ~ 30min, then is warming up to 180 DEG C with the temperature rise rate of 2 DEG C/min, then reduces by 5 DEG C every 10min, simultaneously in cooling tower with flow velocity for 10 ~ 15m
3/ s blasts freezing air, until the temperature in cooling tower reaches 30 ~ 35 DEG C, obtains the magnesium sulfate monohydrate refined.
Preferably, described spray-drying process is produced in the method for magnesium sulfate monohydrate, one transport unit is installed in described drying tower, described transport unit is made up of chain and sprocket wheel, the upper and lower of chain are separately installed with a rotating disk and micromachine, rotate under the control of the micromachine that described rotating disk is arranged on chain, thick magnesium sulfate heptahydrate is placed on described rotating disk and carries out Rotary drying, when first time blasts warm air, micromachine controls rotating disk and turns clockwise, when second time blasts warm air, micromachine controls rotating disk and is rotated counterclockwise, the top of described drying tower and bottom are respectively provided with a gas blower, drying is carried out to the thick magnesium sulfate heptahydrate in upper and lower two-layer rotating disk simultaneously.
Preferably, described spray-drying process is produced in the method for magnesium sulfate monohydrate, described rotating disk is set to multiple fan-shaped blade and combines, one end of described fan-shaped blade is articulated on the turning axle of described rotating disk, each fan-shaped blade height is crisscross arranged, each fan-shaped blade is set to the groove-like that centre is low, surrounding is high, and thick magnesium sulfate heptahydrate is placed in the centre of fan-shaped blade.
Preferably, described spray-drying process is produced in the method for magnesium sulfate monohydrate, and the travelling speed of described sprocket wheel is 3 ~ 6m/s.
Spray-drying process of the present invention is produced in the method for magnesium sulfate monohydrate, deliver in drying tower dry after the thick magnesium sulfate heptahydrate obtained is filtered, the top of described drying tower and bottom are respectively provided with a gas blower, two gas blowers carry out forced air drying to the two-layer thick magnesium sulfate heptahydrate on chain simultaneously, and under chain-driving, two-layer thick magnesium sulfate heptahydrate switch carries out cyclic drying, and drying efficiency is high.While cyclic drying, the micromachine that chain is installed drives rotating disk first to carry out turning clockwise being rotated counterclockwise again, and the rotating speed of the temperature controlled respectively in the warm air flow velocity of twice air blast, drying tower and rotating disk, the groove of the fan-shaped blade of the rotating disk that height is crisscross arranged is placed in due to thick magnesium sulfate heptahydrate, when Rotary drying, thick magnesium sulfate heptahydrate both can not fly out from rotating disk, obtained abundant drying simultaneously, shortened time of drying.Described crude monohydrate magnesium sulfate delivers to crystallisation by cooling in cooling tower, gradient cooling method is adopted to lower the temperature step by step to crude monohydrate magnesium sulfate, and in temperature-fall period, adopt the measure being incubated again gradient increased temperature gradient cooling then, make the refining magnesium sulfate monohydrate that obtains superior in quality stable, commercially there is certain competitive edge.
Accompanying drawing explanation
Fig. 1 is the method flow diagram that spray-drying process of the present invention produces magnesium sulfate monohydrate.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail, can implement according to this with reference to specification sheets word to make those skilled in the art.
The invention provides a kind of method that spray-drying process produces magnesium sulfate monohydrate, comprise the following steps:
Embodiment 1
Step one, chemical byproduct sulfuric acid and magnesia powder are evenly joined successively in reaction mixer, at 85 DEG C, stirring reaction 2 hours, obtains thick magnesium sulfate heptahydrate;
Step 2, to be filtered by described thick magnesium sulfate heptahydrate and deliver in drying tower, be 20m with flow velocity in drying tower
3/ s blasts warm air, and the temperature controlled in drying tower is 320 DEG C, and the rotating speed of the rotating disk in drying tower is 6 revolutions per seconds, and after dry 1 hour, regulate the temperature in drying tower to be 170 DEG C, the rotating speed of rotating disk is 2 revolutions per seconds, and blast flow velocity is 5m simultaneously
3the warm air of/s, dry 30min, obtains crude monohydrate magnesium sulfate, and dry raw magnesium sulfate heptahydrate is conducive to the stable of crystal formation at twice, and the quality product obtained is better, and Rotary drying is conducive to the abundant volatilization of moisture, and shorten time of drying, working efficiency is high;
Step 3, described crude monohydrate magnesium sulfate is delivered to crystallisation by cooling in cooling tower, adopt gradient cooling method to lower the temperature step by step to crude monohydrate magnesium sulfate, in 20min cooling tower, temperature reduces by 50 DEG C, is 15m in cooling tower with flow velocity simultaneously
3/ s blasts freezing air, when the temperature in cooling tower is down to 100 DEG C, and insulation 20min, then be warming up to 180 DEG C with the temperature rise rate of 2 DEG C/min, then reduce by 5 DEG C every 10min, be 10m with flow velocity simultaneously in cooling tower
3/ s blasts freezing air, until the temperature in cooling tower reaches 30 DEG C, obtains the magnesium sulfate monohydrate refined.
Embodiment 2
Step one, chemical byproduct sulfuric acid and magnesia powder are evenly joined successively in reaction mixer, at 100 DEG C, stirring reaction 5 hours, obtains thick magnesium sulfate heptahydrate;
Step 2, to be filtered by described thick magnesium sulfate heptahydrate and deliver in drying tower, be 25m with flow velocity in drying tower
3/ s blasts warm air, and the temperature controlled in drying tower is 350 DEG C, and the rotating speed of the rotating disk in drying tower is 8 revolutions per seconds, and after dry 3 hours, regulate the temperature in drying tower to be 180 DEG C, the rotating speed of rotating disk is 4 revolutions per seconds, and blast flow velocity is 10m simultaneously
3the warm air of/s, dry 50min, obtains crude monohydrate magnesium sulfate, and dry raw magnesium sulfate heptahydrate is conducive to the stable of crystal formation at twice, and the quality product obtained is better, and Rotary drying is conducive to the abundant volatilization of moisture, and shorten time of drying, working efficiency is high;
Step 3, described crude monohydrate magnesium sulfate is delivered to crystallisation by cooling in cooling tower, adopt gradient cooling method to lower the temperature step by step to crude monohydrate magnesium sulfate, in 20min cooling tower, temperature reduces by 50 DEG C, is 18m in cooling tower with flow velocity simultaneously
3/ s blasts freezing air, when the temperature in cooling tower is down to 100 DEG C, and insulation 30min, then be warming up to 180 DEG C with the temperature rise rate of 2 DEG C/min, then reduce by 5 DEG C every 10min, be 15m with flow velocity simultaneously in cooling tower
3/ s blasts freezing air, until the temperature in cooling tower reaches 35 DEG C, obtains the magnesium sulfate monohydrate refined.
Described spray-drying process is produced in the method for magnesium sulfate monohydrate, one transport unit is installed in described drying tower, described transport unit is made up of chain and sprocket wheel, the upper and lower of chain are separately installed with a rotating disk and micromachine, rotate under the control of the micromachine that described rotating disk is arranged on chain, thick magnesium sulfate heptahydrate is placed on described rotating disk and carries out Rotary drying, when first time blasts warm air, micromachine controls rotating disk and turns clockwise, when second time blasts warm air, micromachine controls rotating disk and is rotated counterclockwise, the thick magnesium sulfate heptahydrate being placed in rotating disk obtains sufficient drying when rotating disk rotates with different directions, be conducive to rapid crystallization to dehydrate, the top of described drying tower and bottom are respectively provided with a gas blower, drying is carried out to the thick magnesium sulfate heptahydrate in upper and lower two-layer rotating disk simultaneously.
Described spray-drying process is produced in the method for magnesium sulfate monohydrate, described rotating disk is set to multiple fan-shaped blade and combines, one end of described fan-shaped blade is articulated on the turning axle of described rotating disk, each fan-shaped blade height is crisscross arranged, each fan-shaped blade is set to the groove-like that centre is low, surrounding is high, and thick magnesium sulfate heptahydrate is placed in the centre of fan-shaped blade.
Described spray-drying process is produced in the method for magnesium sulfate monohydrate, and the travelling speed of described sprocket wheel is 3 ~ 6m/s.
Although embodiment of the present invention are open as above, but it is not restricted to listed in specification sheets and embodiment utilization, it can be applied to various applicable the field of the invention completely, for those skilled in the art, can easily realize other amendment, therefore do not deviating under the universal that claim and equivalency range limit, the present invention is not limited to specific details and illustrates here and the legend described.
Claims (3)
1. spray-drying process produces a method for magnesium sulfate monohydrate, it is characterized in that, comprises the following steps:
Step one, chemical byproduct sulfuric acid and magnesia powder are evenly joined successively in reaction mixer, at 85 ~ 100 DEG C, stirring reaction 2 ~ 5 hours, obtains thick magnesium sulfate heptahydrate;
Step 2, described thick magnesium sulfate heptahydrate filtered and delivers in drying tower, in drying tower with flow velocity for 20 ~ 25m
3/ s blasts warm air, and the temperature controlled in drying tower is 320 ~ 350 DEG C, and the rotating speed of the rotating disk in drying tower is 6 ~ 8 revolutions per seconds, after dry 1 ~ 3 hour, regulate the temperature in drying tower to be 170 ~ 180 DEG C, the rotating speed of rotating disk is 2 ~ 4 revolutions per seconds, and blast flow velocity is 5 ~ 10m simultaneously
3the warm air of/s, dry 30 ~ 50min, obtains crude monohydrate magnesium sulfate;
Step 3, described crude monohydrate magnesium sulfate is delivered to crystallisation by cooling in cooling tower, adopt gradient cooling method to lower the temperature step by step to crude monohydrate magnesium sulfate, in 20min cooling tower, temperature reduces by 50 DEG C, simultaneously in cooling tower with flow velocity for 15 ~ 18m
3/ s blasts freezing air, and when the temperature in cooling tower is down to 100 DEG C, insulation 20 ~ 30min, then is warming up to 180 DEG C with the temperature rise rate of 2 DEG C/min, then reduces by 5 DEG C every 10min, simultaneously in cooling tower with flow velocity for 10 ~ 15m
3/ s blasts freezing air, until the temperature in cooling tower reaches 30 ~ 35 DEG C, obtains the magnesium sulfate monohydrate refined;
Wherein, one transport unit is installed in described drying tower, described transport unit is made up of chain and sprocket wheel, the upper and lower of chain are separately installed with a rotating disk and micromachine, rotate under the control of the micromachine that described rotating disk is arranged on chain, thick magnesium sulfate heptahydrate is placed on described rotating disk and carries out Rotary drying, when first time blasts warm air, micromachine controls rotating disk and turns clockwise, when second time blasts warm air, micromachine controls rotating disk and is rotated counterclockwise, the top of described drying tower and bottom are respectively provided with a gas blower, drying is carried out to the thick magnesium sulfate heptahydrate in upper and lower two-layer rotating disk simultaneously.
2. spray-drying process as claimed in claim 1 produces the method for magnesium sulfate monohydrate, it is characterized in that, described rotating disk is set to multiple fan-shaped blade and combines, one end of described fan-shaped blade is articulated on the turning axle of described rotating disk, each fan-shaped blade height is crisscross arranged, each fan-shaped blade is set to the groove-like that centre is low, surrounding is high, and thick magnesium sulfate heptahydrate is placed in the centre of fan-shaped blade.
3. spray-drying process as claimed in claim 2 produces the method for magnesium sulfate monohydrate, and it is characterized in that, the travelling speed of described sprocket wheel is 3 ~ 6m/s.
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| CN105621460A (en) * | 2015-12-31 | 2016-06-01 | 王丰登 | Production method of anhydrous magnesium salt |
| CN107162028A (en) * | 2017-05-23 | 2017-09-15 | 常州联慧资源环境科技有限公司 | A kind of preparation method of magnesium sulfate monohydrate |
| CN110844924B (en) * | 2019-12-04 | 2022-06-10 | 新疆森田物流有限公司 | Method for producing food-grade and feed-grade anhydrous magnesium sulfate |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102583459A (en) * | 2012-02-22 | 2012-07-18 | 化工部长沙设计研究院 | Process for preparing magnesium sulfate monohydrate by using water-containing magnesium sulfate heptahydrate |
| CN202415186U (en) * | 2011-12-23 | 2012-09-05 | 中节能六合天融环保科技有限公司 | Device for preparing magnesium sulfate monohydrate by dehydrating magnesium sulfate heptahydrate |
| CN103387248A (en) * | 2013-07-29 | 2013-11-13 | 中国科学院青海盐湖研究所 | Method and fluidized-bed plant for preparing magnesium sulfate monohydrate by using magnesium sulfate heptahydrate |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202415186U (en) * | 2011-12-23 | 2012-09-05 | 中节能六合天融环保科技有限公司 | Device for preparing magnesium sulfate monohydrate by dehydrating magnesium sulfate heptahydrate |
| CN102583459A (en) * | 2012-02-22 | 2012-07-18 | 化工部长沙设计研究院 | Process for preparing magnesium sulfate monohydrate by using water-containing magnesium sulfate heptahydrate |
| CN103387248A (en) * | 2013-07-29 | 2013-11-13 | 中国科学院青海盐湖研究所 | Method and fluidized-bed plant for preparing magnesium sulfate monohydrate by using magnesium sulfate heptahydrate |
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Address after: The Guangxi Zhuang Autonomous Region Beihai Road, Taiwan Road, Northeast China Electronics Beihai Industrial Park incubator building, room, 3rd floor, Room 302 Patentee after: Yang Haiji Address before: 530021 the Guangxi Zhuang Autonomous Region Nanning Qingxiu District Taoyuan Road Patentee before: Yang Haiji |
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Effective date of registration: 20200513 Address after: Qinliu village, Gaoyi County, Shijiazhuang City, Hebei Province Patentee after: Hebei best Pharmaceutical Co., Ltd Address before: The Guangxi Zhuang Autonomous Region Beihai Road, Taiwan Road, Northeast China Electronics Beihai Industrial Park incubator building, room, 3rd floor, Room 302 Patentee before: Yang Haiji |