CN103922379A - Preparation method of bunch-shaped calcium sulphate dihydrate - Google Patents
Preparation method of bunch-shaped calcium sulphate dihydrate Download PDFInfo
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- CN103922379A CN103922379A CN201410126408.3A CN201410126408A CN103922379A CN 103922379 A CN103922379 A CN 103922379A CN 201410126408 A CN201410126408 A CN 201410126408A CN 103922379 A CN103922379 A CN 103922379A
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- calcium sulfate
- preparation
- bouquet
- sulfate dihydrate
- calcium
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- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 title abstract description 23
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000011575 calcium Substances 0.000 claims abstract description 16
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 16
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims abstract description 11
- 239000001110 calcium chloride Substances 0.000 claims abstract description 7
- 229910001628 calcium chloride Inorganic materials 0.000 claims abstract description 7
- 239000008367 deionised water Substances 0.000 claims abstract description 7
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 7
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 73
- 239000012065 filter cake Substances 0.000 claims description 26
- 238000003756 stirring Methods 0.000 claims description 16
- 238000005406 washing Methods 0.000 claims description 16
- -1 Calcium halide Chemical class 0.000 claims description 15
- GNHOJBNSNUXZQA-UHFFFAOYSA-J potassium aluminium sulfate dodecahydrate Chemical compound O.O.O.O.O.O.O.O.O.O.O.O.[Al+3].[K+].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O GNHOJBNSNUXZQA-UHFFFAOYSA-J 0.000 claims description 6
- 238000001556 precipitation Methods 0.000 claims description 5
- 239000002562 thickening agent Substances 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 4
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 2
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 2
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims 3
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 claims 1
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 claims 1
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 6
- 239000007864 aqueous solution Substances 0.000 abstract description 2
- 229910010272 inorganic material Inorganic materials 0.000 abstract description 2
- 239000011147 inorganic material Substances 0.000 abstract description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract 1
- 229940103272 aluminum potassium sulfate Drugs 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- GRLPQNLYRHEGIJ-UHFFFAOYSA-J potassium aluminium sulfate Chemical compound [Al+3].[K+].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O GRLPQNLYRHEGIJ-UHFFFAOYSA-J 0.000 abstract 1
- 239000002994 raw material Substances 0.000 abstract 1
- 238000003786 synthesis reaction Methods 0.000 abstract 1
- 235000011132 calcium sulphate Nutrition 0.000 description 17
- 239000010440 gypsum Substances 0.000 description 14
- 229910052602 gypsum Inorganic materials 0.000 description 14
- 239000013078 crystal Substances 0.000 description 10
- 239000000243 solution Substances 0.000 description 10
- 238000005033 Fourier transform infrared spectroscopy Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 4
- 238000001000 micrograph Methods 0.000 description 4
- 238000000634 powder X-ray diffraction Methods 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 230000008719 thickening Effects 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 239000011507 gypsum plaster Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 150000004683 dihydrates Chemical class 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 238000005649 metathesis reaction Methods 0.000 description 2
- 235000019832 sodium triphosphate Nutrition 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 239000001828 Gelatine Substances 0.000 description 1
- 241001079660 Phanes Species 0.000 description 1
- 101710194948 Protein phosphatase PhpP Proteins 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 238000007385 chemical modification Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- HWGNBUXHKFFFIH-UHFFFAOYSA-I pentasodium;[oxido(phosphonatooxy)phosphoryl] phosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O HWGNBUXHKFFFIH-UHFFFAOYSA-I 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- UNXRWKVEANCORM-UHFFFAOYSA-I triphosphate(5-) Chemical compound [O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O UNXRWKVEANCORM-UHFFFAOYSA-I 0.000 description 1
Landscapes
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
一种花束状二水硫酸钙制备方法，属于材料化学无机材料制备技术领域。由下述方法制得：以0.1-0.5M氯化钙提供钙源，0.05-0.25M硫酸铝钾提供硫酸根，在低浓度（0.1-0.5wt%）CMC水溶液中25-80℃下合成，反应0.5h后以乙醇和去离子水为淋洗液室温洗涤，过滤，50-80℃干燥3-10小时后得到花束状二水硫酸钙。该方法所选原材料价格低廉，合成路线简单，操作方便，具有广泛的应用前景。
The invention discloses a preparation method of bouquet-shaped calcium sulfate dihydrate, which belongs to the technical field of material chemistry inorganic material preparation. It is prepared by the following method: 0.1-0.5M calcium chloride provides calcium source, 0.05-0.25M aluminum potassium sulfate provides sulfate radical, and it is synthesized in low concentration (0.1-0.5wt%) CMC aqueous solution at 25-80°C, After reacting for 0.5h, wash with ethanol and deionized water at room temperature, filter, and dry at 50-80°C for 3-10 hours to obtain a bouquet-like calcium sulfate dihydrate. The raw materials selected by the method are cheap, the synthesis route is simple, the operation is convenient, and the method has wide application prospects.
Description
Technical field
The invention belongs to materials chemistry inorganic materials preparing technical field, more specifically to a kind of preparation method of bouquet shape terra alba.
Background technology
The structure of crystal is controlled in crystal engineering research and is full of challenge, and causes different field scientific worker's broad interest always.
Terra alba, claims again gypsum.As the time-honored mineral starting material of one, unique and be easy to processing to eco-friendly, physicals because of it, more and more there is wide exploitation and application prospect in fields such as environment, health, buildings.The nearly more than ten years, gypsum is mainly concentrated on to crystal transition and stabilization research aspect both at home and abroad, by the aquation process of doping metals inorganic salt, inorganic molecules or organic polymer molecular Control plaster of Paris, and then the impact of its hardenite microstructure change of research gypsum intensity.M.M.Rashad has studied the spectrum change that organic/inorganic additive forms gypsum crystal in phosphoric acid solution simulated environment; St é phane Veesler has studied in dissimilar carboxylic acid environment semi-hydrated gypsum to the transforming relationship of dihydrate gypsum; Peng Jiahui studies the impact of plaster of Paris aquation process with gelatine, tripoly phosphate sodium STPP etc., has proposed the slow setting mechanism of additive to plaster of Paris; Yuan Zhitao is proposing the adsorption of stablizer to whisker surface aspect double water crystal whisker of gypsum stabilization treatment of research plurality of stable agent.But, so far, about in the aqueous solution, introduce lower concentration thickening material on dihydrate gypsum mineralising after the report of crystal morphology impact little.
As the fine etherate of a kind of carboxymethyl cellulose of obtaining through chemical modification, Xylo-Mucine (CMC) has than other thickening material and the more excellent performance of stablizer, has a wide range of applications in fields such as food, health, medicine, daily use chemicals.As everyone knows, the influence factor of gypsum product performance has grade of gypsum, time of coagulation, demould time, adulterant kind etc.Different varieties Additive can cause the microstructure change of gypsum, and then affects the performance of plastering.Therefore select the adulterant of adapted varieties to prepare the gypsum of special appearance particularly important.
Summary of the invention
For solving prior art problem, the invention provides a kind of bouquet shape terra alba preparation method.From the replacement(metathesis)reaction of calcium halide and vitriol, and then the synthetic calcium sulfate that contains two crystal water, be finally prepared into a kind of bouquet shape terra alba, synthetic route is simple, easy to operate, and productive rate is higher, the kind that further increases gypsum product, is expected to as building material product.
The technical solution adopted in the present invention is as follows:
A preparation method for bouquet shape terra alba, it comprises following steps:
A. calcium halide solution preparation: thickening material is stirred in the reactor adding containing deionized water to stirring, ultrasonic to dissolving; Then add calcium halide, be stirred to dissolving.
B. terra alba preparation: vitriol is stirred and is added in steps A calcium halide solution, continue to be stirred to precipitation and occur, filter and obtain terra alba filter cake;
C. washing: filter the terra alba filter cake obtaining directly with ethanol and water washing, or directly add ethanol and water washing after drying;
D. dry: the terra alba of ethanol and water washing is dried to obtain bouquet shape terra alba.
The calcium halide solution that described steps A obtains refers to that in concentration be the preferred 0.2-0.4wt% of 0.1-0.5wt%() thickener soln in add equivalent concentration calcium halide, calcium halide concentration 0.1-0.5M, 25-80 DEG C stir 0.5 hour.
Described thickening material refers to Xylo-Mucine (CMC).
Described calcium halide refers to calcium chloride.
Described vitriol refers to Potassium aluminum sulfate dodecahydrate.
The washing of described step C refers to that filtering the calcium sulfate filter cake that obtains adds under ethanol and hydroecium temperature and filter drip washing, or filters after the 50-80 DEG C of oven dry of calcium sulfate filter cake obtaining and add under ethanol and hydroecium temperature and filter drip washing.
The dry of described step D refers to that washed calcium sulfate filter cake obtains bouquet shape terra alba for 3-10 hour through 50-80 DEG C of oven dry.
Specific embodiment of the invention process is:
The deionized water of certain volume is mixed with to Xylo-Mucine (CMC) solution of concentration 0.1-0.5wt%, ultrasonic at 25-80 DEG C, stirring adds the calcium chloride of equivalent concentration 0.1-0.5M after 0.5 hour, at 25-80 DEG C, continue to stir 0.5 hour, then the Potassium aluminum sulfate dodecahydrate of equivalent concentration 0.05-0.25M is stirred and is added in calcium chloride solution, at 25-80 DEG C, continue to stir 0.5 hour, filter and obtain terra alba filter cake.The calcium sulfate filter cake that filtration obtains adds under ethanol and hydroecium temperature and filters drip washing, or filters after the 50-80 DEG C of oven dry of calcium sulfate filter cake obtaining and add under ethanol and hydroecium temperature and filter drip washing.Washed calcium sulfate filter cake is dried 3-10 hour to obtain bouquet shape terra alba through 50-80 DEG C.
A kind of bouquet shape terra alba preparation method of the present invention, from the replacement(metathesis)reaction of calcium halide and vitriol, and then the synthetic calcium sulfate that contains two crystal water, finally make a kind of bouquet shape sulfate dihydrate calcium material, synthetic route is simple, easy to operate, productive rate is higher, and the bouquet shape sulfate dihydrate calcium material of gained is fan-shaped bouquet shape.
Brief description of the drawings
In order more to express to clear and definite the technical scheme of this inventive embodiments, below embodiment is described in the accompanying drawing that uses be briefly described.Obviously, the accompanying drawing in below describing is only some embodiments of the present invention, for this field those of ordinary skill, under the prerequisite of not paying creative work, also can obtain according to this type of accompanying drawing other accompanying drawing.
Fig. 1 is the whole synthetic route chart of a kind of bouquet shape of the present invention terra alba;
Fig. 2 is the electron scanning micrograph of a kind of bouquet shape of the present invention terra alba;
Fig. 3 is the X-ray powder diffraction pattern of a kind of bouquet shape of the present invention terra alba;
Fig. 4 is the Fourier transform infrared spectroscopy figure of a kind of bouquet shape of the present invention terra alba;
Fig. 5 is the transmission electron microscope picture of a kind of bouquet shape of the present invention terra alba.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
Embodiment 1
The deionized water of 500mL is mixed with to Xylo-Mucine (CMC) solution of 0.2wt%, ultrasonic at 30 DEG C, stir the calcium chloride that adds equivalent concentration 0.1M after 0.5 hour, continue to stir 0.5 hour at 30 DEG C; Then the Potassium aluminum sulfate dodecahydrate of equivalent concentration 0.05M is stirred and is added in calcium chloride solution, continue to be stirred to precipitation at 30 DEG C to occur, filter and obtain terra alba filter cake; The calcium sulfate filter cake obtaining adds under ethanol and hydroecium temperature and filters drip washing, or filters after the 60 DEG C of oven dry of calcium sulfate filter cake that obtain and add under ethanol and hydroecium temperature and filter drip washing; Washed calcium sulfate filter cake is dried 5 hours to obtain bouquet shape terra alba through 50 DEG C.
The above-mentioned a kind of bouquet shape terra alba thing preparing is carried out to Measurement and analysis mutually, obtain electron scanning micrograph as shown in Figure 2, as shown in Figure 2: the calcium sulphate dihydrate obtaining is bouquet shape pattern.
Fig. 3 is the X-ray powder diffraction pattern of this kind of bouquet shape terra alba, as shown in Figure 3: bouquet shape Crystallization of Gypsum degree is higher.
Fig. 4 is the Fourier transform infrared spectroscopy figure of this kind of bouquet shape terra alba, as shown in Figure 4: 3522cm
-1with 3399cm
-1near absorption band belongs to the stretching vibration of bouquet shape terra alba hydroxyl and crystal water, 1619cm
-1near absorption band belongs to the flexural vibration of bouquet shape terra alba hydroxyl, 1103cm
-1, 667cm
-1with 598cm
-1near absorption band belongs to stretching vibration and the flexural vibration of bouquet shape terra alba sulfate radical.
Fig. 5 is the transmission electron microscope picture of this kind of bouquet shape terra alba, as shown in Figure 5: bouquet shape terra alba is single crystalline structure, and preferential (021) and (041) crystal face of exposing.
Embodiment 2
The deionized water of 1000mL is mixed with to Xylo-Mucine (CMC) solution of 0.4wt%, ultrasonic at 50 DEG C, stir after 0.5 hour and add equivalent concentration 0.3M calcium chloride, continue to stir 0.5 hour at 50 DEG C; Then the Potassium aluminum sulfate dodecahydrate of equivalent concentration 0.15M is stirred and is added in calcium chloride solution, continue to be stirred to precipitation at 50 DEG C to occur, filter and obtain terra alba filter cake; The calcium sulfate filter cake obtaining adds under ethanol and hydroecium temperature and filters drip washing, or filters after the 70 DEG C of oven dry of calcium sulfate filter cake that obtain and add under ethanol and hydroecium temperature and filter drip washing; Washed calcium sulfate filter cake is dried 8 hours to obtain bouquet shape terra alba through 80 DEG C.
The above-mentioned a kind of bouquet shape terra alba thing preparing is carried out to Measurement and analysis mutually, obtain similar electron scanning micrograph as shown in Figure 2, similar X-ray powder diffraction pattern as shown in Figure 3, similar Fourier transform infrared spectroscopy figure as shown in Figure 4, similar transmission electron microscope picture as shown in Figure 5.
Embodiment 3
The deionized water of 5000mL is mixed with to Xylo-Mucine (CMC) solution of 0.5wt%, ultrasonic at 80 DEG C, stir after 0.5 hour and add equivalent concentration 0.5M calcium chloride, continue to stir 0.5 hour at 80 DEG C; Then the Potassium aluminum sulfate dodecahydrate of equivalent concentration 0.25M is stirred and is added in calcium chloride solution, continue to be stirred to precipitation at 80 DEG C to occur, filter and obtain terra alba filter cake; The calcium sulfate filter cake obtaining adds under ethanol and hydroecium temperature and filters drip washing, or filters after the 80 DEG C of oven dry of calcium sulfate filter cake that obtain and add under ethanol and hydroecium temperature and filter drip washing; Washed calcium sulfate filter cake is dried 10 hours to obtain bouquet shape terra alba through 60 DEG C.
The above-mentioned a kind of bouquet shape terra alba thing preparing is carried out to Measurement and analysis mutually, obtain similar electron scanning micrograph as shown in Figure 2, similar X-ray powder diffraction pattern as shown in Figure 3, similar Fourier transform infrared spectroscopy figure as shown in Figure 4, similar transmission electron microscope picture as shown in Figure 5.
The foregoing is only the present invention and be described further, and unrestricted the present invention, all in spiritual principles of the present invention, any amendment of making, be equal to and replace or improvement etc., all should be included in protection scope of the present invention.
Claims (9)
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410126408.3A CN103922379B (en) | 2014-03-31 | 2014-03-31 | A kind of bouquet shape terra alba preparation method |
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| CN201410126408.3A CN103922379B (en) | 2014-03-31 | 2014-03-31 | A kind of bouquet shape terra alba preparation method |
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| CN103922379A true CN103922379A (en) | 2014-07-16 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104556760A (en) * | 2014-12-28 | 2015-04-29 | 北京工业大学 | Method for preparing hollow rod-shaped semi-hydrated gypsum by using desulphurization stone |
| CN112429759A (en) * | 2020-12-07 | 2021-03-02 | 安徽六国化工股份有限公司 | Micron-sized flower-shaped alpha-CaSO4·0.5H2Method for producing O crystal |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4817531B1 (en) * | 1969-07-11 | 1973-05-30 | ||
| CN1911813A (en) * | 2006-08-24 | 2007-02-14 | 同济大学 | Preparation method of calcium sulfate nanometer material |
| CN101538059A (en) * | 2009-04-17 | 2009-09-23 | 北京工业大学 | Preparation method of superstructure aragonite calcium carbonate crystal |
| CN101586255A (en) * | 2009-06-08 | 2009-11-25 | 安徽工业大学 | A kind of preparation method of calcium sulfate dihydrate whisker |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4817531Y1 (en) * | 1967-07-28 | 1973-05-19 |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4817531B1 (en) * | 1969-07-11 | 1973-05-30 | ||
| CN1911813A (en) * | 2006-08-24 | 2007-02-14 | 同济大学 | Preparation method of calcium sulfate nanometer material |
| CN101538059A (en) * | 2009-04-17 | 2009-09-23 | 北京工业大学 | Preparation method of superstructure aragonite calcium carbonate crystal |
| CN101586255A (en) * | 2009-06-08 | 2009-11-25 | 安徽工业大学 | A kind of preparation method of calcium sulfate dihydrate whisker |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104556760A (en) * | 2014-12-28 | 2015-04-29 | 北京工业大学 | Method for preparing hollow rod-shaped semi-hydrated gypsum by using desulphurization stone |
| CN112429759A (en) * | 2020-12-07 | 2021-03-02 | 安徽六国化工股份有限公司 | Micron-sized flower-shaped alpha-CaSO4·0.5H2Method for producing O crystal |
| CN112429759B (en) * | 2020-12-07 | 2022-11-01 | 安徽六国化工股份有限公司 | A kind of preparation method of micron size flower-like α-CaSO4 0.5H2O crystal |
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