CN101885514B - Preparation for ultrafine anhydrous sulfate by a two-step method - Google Patents
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- CN101885514B CN101885514B CN2010102144748A CN201010214474A CN101885514B CN 101885514 B CN101885514 B CN 101885514B CN 2010102144748 A CN2010102144748 A CN 2010102144748A CN 201010214474 A CN201010214474 A CN 201010214474A CN 101885514 B CN101885514 B CN 101885514B
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- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract 9
- 238000002360 preparation method Methods 0.000 title abstract 3
- 230000018044 dehydration Effects 0.000 claims abstract description 35
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000013078 crystal Substances 0.000 claims abstract description 21
- 238000001035 drying Methods 0.000 claims abstract description 21
- 238000001354 calcination Methods 0.000 claims abstract description 9
- 229910017053 inorganic salt Inorganic materials 0.000 claims abstract description 6
- 241000220317 Rosa Species 0.000 claims description 20
- 238000010298 pulverizing process Methods 0.000 claims description 16
- 238000013459 approach Methods 0.000 claims description 15
- 229910000365 copper sulfate Inorganic materials 0.000 claims description 7
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 claims description 7
- 150000002815 nickel Chemical class 0.000 claims description 7
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 claims description 7
- 229910000368 zinc sulfate Inorganic materials 0.000 claims description 7
- 229960001763 zinc sulfate Drugs 0.000 claims description 7
- ZXAUZSQITFJWPS-UHFFFAOYSA-J zirconium(4+);disulfate Chemical compound [Zr+4].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZXAUZSQITFJWPS-UHFFFAOYSA-J 0.000 claims description 7
- 150000004688 heptahydrates Chemical group 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 4
- 229910021653 sulphate ion Inorganic materials 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 4
- 239000000654 additive Substances 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 208000005156 Dehydration Diseases 0.000 abstract 2
- 239000006185 dispersion Substances 0.000 abstract 1
- 238000005245 sintering Methods 0.000 abstract 1
- 239000010941 cobalt Substances 0.000 description 34
- 229910017052 cobalt Inorganic materials 0.000 description 34
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 34
- 241001465754 Metazoa Species 0.000 description 7
- 239000002245 particle Substances 0.000 description 6
- ASARMUCNOOHMLO-WLORSUFZSA-L cobalt(2+);[(2r,3s,4r,5s)-5-(5,6-dimethylbenzimidazol-1-yl)-4-hydroxy-2-(hydroxymethyl)oxolan-3-yl] [(2s)-1-[3-[(1r,2r,3r,4z,7s,9z,12s,13s,14z,17s,18s,19r)-2,13,18-tris(2-amino-2-oxoethyl)-7,12,17-tris(3-amino-3-oxopropyl)-3,5,8,8,13,15,18,19-octamethyl-2 Chemical compound [Co+2].[N-]([C@@H]1[C@H](CC(N)=O)[C@@]2(C)CCC(=O)NC[C@H](C)OP([O-])(=O)O[C@H]3[C@H]([C@H](O[C@@H]3CO)N3C4=CC(C)=C(C)C=C4N=C3)O)\C2=C(C)/C([C@H](C\2(C)C)CCC(N)=O)=N/C/2=C\C([C@H]([C@@]/2(CC(N)=O)C)CCC(N)=O)=N\C\2=C(C)/C2=N[C@]1(C)[C@@](C)(CC(N)=O)[C@@H]2CCC(N)=O ASARMUCNOOHMLO-WLORSUFZSA-L 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 241000282898 Sus scrofa Species 0.000 description 4
- 208000007502 anemia Diseases 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 210000004185 liver Anatomy 0.000 description 3
- 239000011573 trace mineral Substances 0.000 description 3
- 235000013619 trace mineral Nutrition 0.000 description 3
- 241000283690 Bos taurus Species 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 235000005911 diet Nutrition 0.000 description 2
- 230000037213 diet Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 102000039446 nucleic acids Human genes 0.000 description 2
- 108020004707 nucleic acids Proteins 0.000 description 2
- 150000007523 nucleic acids Chemical class 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 208000024891 symptom Diseases 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- 208000024172 Cardiovascular disease Diseases 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 241000287828 Gallus gallus Species 0.000 description 1
- 208000010412 Glaucoma Diseases 0.000 description 1
- 206010018498 Goitre Diseases 0.000 description 1
- 206010053759 Growth retardation Diseases 0.000 description 1
- FFEARJCKVFRZRR-BYPYZUCNSA-N L-methionine Chemical compound CSCC[C@H](N)C(O)=O FFEARJCKVFRZRR-BYPYZUCNSA-N 0.000 description 1
- 208000003926 Myelitis Diseases 0.000 description 1
- 241001494479 Pecora Species 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000006053 animal diet Substances 0.000 description 1
- 235000019728 animal nutrition Nutrition 0.000 description 1
- 230000002924 anti-infective effect Effects 0.000 description 1
- 230000036528 appetite Effects 0.000 description 1
- 235000019789 appetite Nutrition 0.000 description 1
- 235000015278 beef Nutrition 0.000 description 1
- 230000004071 biological effect Effects 0.000 description 1
- 230000008827 biological function Effects 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 230000023852 carbohydrate metabolic process Effects 0.000 description 1
- 235000021256 carbohydrate metabolism Nutrition 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- OEYIOHPDSNJKLS-UHFFFAOYSA-N choline Chemical compound C[N+](C)(C)CCO OEYIOHPDSNJKLS-UHFFFAOYSA-N 0.000 description 1
- 229960001231 choline Drugs 0.000 description 1
- 125000003346 cobalamin group Chemical group 0.000 description 1
- GVPFVAHMJGGAJG-UHFFFAOYSA-L cobalt dichloride Chemical compound [Cl-].[Cl-].[Co+2] GVPFVAHMJGGAJG-UHFFFAOYSA-L 0.000 description 1
- KTVIXTQDYHMGHF-UHFFFAOYSA-L cobalt(2+) sulfate Chemical compound [Co+2].[O-]S([O-])(=O)=O KTVIXTQDYHMGHF-UHFFFAOYSA-L 0.000 description 1
- ZOTKGJBKKKVBJZ-UHFFFAOYSA-L cobalt(2+);carbonate Chemical compound [Co+2].[O-]C([O-])=O ZOTKGJBKKKVBJZ-UHFFFAOYSA-L 0.000 description 1
- QAHREYKOYSIQPH-UHFFFAOYSA-L cobalt(II) acetate Chemical compound [Co+2].CC([O-])=O.CC([O-])=O QAHREYKOYSIQPH-UHFFFAOYSA-L 0.000 description 1
- 229910000001 cobalt(II) carbonate Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 201000008496 endemic goiter Diseases 0.000 description 1
- 239000004459 forage Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 210000003714 granulocyte Anatomy 0.000 description 1
- 231100000001 growth retardation Toxicity 0.000 description 1
- 230000011132 hemopoiesis Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 244000144972 livestock Species 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000002503 metabolic effect Effects 0.000 description 1
- 229930182817 methionine Natural products 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 229940029985 mineral supplement Drugs 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 201000006938 muscular dystrophy Diseases 0.000 description 1
- 230000003448 neutrophilic effect Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
Landscapes
- Coloring Foods And Improving Nutritive Qualities (AREA)
Abstract
The invention discloses preparation of ultrafine anhydrous sulfate by a two-step method. The sulfate is prepared by the following steps: calcinating and crushing sulfate crystal containing crystal water after the crystal is subjected to expansion drying and crushing at the temperature of 100-150 DEG C, and performing primary dehydration and crushing by using a drying and crushing combined machine invented by the inventor (China patent application number is 200920093766.3); and performing secondary drying and crushing by using a rotary kiln for uniform calcination of inorganic salt invented by the inventor (China patent application number is 200820072472.8). The preparation has better effect and higher efficiency, solves the problems that the sulfate crystal is easily hardened and caked, is difficult to crush and has long manufacture time, large granularity, hard control and high cost in the dehydration process of directly sintering the sulfate crystal; and the prepared ultrafine anhydrous sulfate has controllable granularity of between 2 and 10mu m on average, good dispersion, short production process, high yield and low cost; and when being used as feed or other additives, the ultrafine anhydrous sulfate should be mixed uniformly.
Description
Technical field
The invention belongs to chemical field, is raw material with the vitriol that contains crystal water specifically, prepares ultrafine anhydrous sulfate with two-step approach.
Sweden chemist Brandt has restored cobalt metal in 1735 from cobalt ore (CoAsS), Azary in 1879 points out cobalt, and hematopoiesis has superperformance to body.Filmer reported first in 1933 scarce cobalt animal can produce serious anaemia, nineteen thirty-five cobalt be trace element essential in people and the Animal nutrition certainly formally.
Cobalt is positioned at d district VIII family in the periodic table of elements, close the title iron group with iron, nickel, is the necessary trace element of human body, with the form performance physiological action of cobalamin, participates in synthetic and the fat and the carbohydrate metabolism of nucleic acid, choline, methionine(Met).When prevention and treatment endemic goiter, that cobalt and iodine associating result of use is better.Cobalt can also improve the biological activity of zinc, makes zinc be easy to absorb.Cobalt can be kept the homergy of nucleic acid, when it lacks, can disturb duplicating of DNA, makes it to produce error, causes some functional deterioration, the metabolic disturbance of cell even causes necrocytosis.Scarce cobalt can cause cardiovascular diseases, anaemia, myelitis and glaucoma etc.Cobalt is the micro-metals with special biological function that microorganism growth needs, and exists close interaction between itself and the mikrobe.Cobalt is participated in the composition of cobalamin and the symbiotic nitrogen fixation of mikrobe and plant.
Cobalt can promote the utilization of non-protein nitrogen(NPN), if diet lacks cobalt, synthesizing slowly of cobalamin influences the utilization of nitrogenous substances in the diet.Cobalt can promote to feed ox with non-pulse family hay to the utilization of urea with to cellulosic digestion, and can improve the speed of growth of ox.When the ruminating animal that grows up when feeding lacked the cobalt daily ration, the cobalamin of storing in the liver was enough kept several weeks.And the reserves of cobalamin are lower in children's ruminating animal liver in age, so they lack very sensitivity to cobalt.The early symptom that cobalt lacks is growth retardation, become thin, weightlessness.More serious symptom is a fat acid decomposition in the liver, the extreme anaemia, and anti-infection ability descends, and the neutrophilic granulocyte function is impaired.
Pig has adds the report that cobalt promotes growth and improves efficiency of feed utilization, also can utilize the report of cobalt composite part cobalamin relevant for the terminal mikrobe of swine alimentary canal.In feed, often allocate the cobalt of 0.1mg/kg into, the sure needs that satisfy pig.When ruminating animal diet cobalt is lower than 0.08mg/kg, poor appetite, poor growth, anaemia is like muscular dystrophy etc.Cobalt disease can appear lacking.When replenishing cobalt to ruminating animal, the injection cobalt has little effect; Must oral administration give.
Though cobalt is the low toxicity element to animal, contains cobalt 400mg/kg in the swine rations children piglet in age is poisoned; Milk cow and beef cattle maximum safety are per kilogram daily ration 10 1 20mg, and sheep then is 50mg, and chicken is responsive, is 4mg.Animal feedstuff contains abundant cobalt, the about 0.8-1.6mg/kg of content, and it is 0.1-0.25mg/kg that normal herbage contains the cobalt amount, and it is low that cereal seed feed contains the cobalt amount, and per kilogram is 0.06-0.09mg only.
Along with science and technology development; Livestock industry intensive culture scale is increasing; In order to reduce cost to greatest extent, forage compounding requires more and more stricter, the cobalt additive that in mixed feed, uses have rose vitriol (, powder blue, cobaltous carbonate, NSC 51149 and Cobaltous diacetate etc.But because its processing characteristics and price is different, use contains the rose vitriol of crystal water, the heptahydrate of widespread usage mostly.
Cobalt is a trace mineral supplement in daily ration, and addition is about 0.1mg/kg, because conventional rose vitriol is aqueous xln, particle size differs, and caking is difficult to mix easily, and the intake of animal individual has more lacks weak effect.
Anhydrous cobaltous sulfate is the mazarine cubic system, specific density 3.71 (25 ℃), and 735 ℃ of fusing points do not lump.Can make by 7 water rose vitriol calcination; If but direct calcination heptahydrate, the crystal dehydration is prone to caking, forms very hard block, is difficult to pulverize, and the time is long, granularity is big and be not easy control, and technology is loaded down with trivial details, the cost height.
Also there is same problem when producing anhydrous sulfate with other vitriol that contains crystal water.For example: single nickel salt (7 water or 6 water), copper sulfate (5 water), zinc sulfate (7 water), sal epsom (7 water) and zirconium sulfate (4 water).
Summary of the invention
The purpose of this invention is to provide two-step approach and prepare ultrafine anhydrous sulfate, it comprises:
Dehydration for the first time: the sulphate crystal body that will contain crystal water under temperature 100-150 ℃, expansion drying, pulverizing;
Dehydration for the second time: after expansion drying, the powder essence, roasting again, pulverizing;
Dehydration temperaturre for the second time: rose vitriol is 400-450 ℃;
Zinc sulfate, zirconium sulfate, single nickel salt temperature are 300-350 ℃;
Sal epsom is 200-250 ℃;
The dehydration temperaturre first time of copper sulfate is 100 ℃, and dehydration temperaturre is 160-200 ℃ for the second time;
The described dehydration first time, use Chinese patent drying and crushing all-in-one, application number: 200920093766.3, expansion drying, pulverizing;
The described dehydration second time, use a kind of inorganic salt uniform calcination rotary kiln of Chinese patent, application number: 200820072472.8, carry out roasting;
The described rose vitriol that contains crystal water is a heptahydrate;
Rose vitriol first dehydration temperaturre is 130-140 ℃.
Two-step approach of the present invention prepares ultrafine anhydrous sulfate; The vitriol that will contain crystal water is under temperature 100-150 ℃, after expansion drying, the pulverizing; Roast is pulverized again; Carry out twice dehydration and pulverize, dehydration is for the first time pulverized, and uses the drying and crushing all-in-one that the inventor develops voluntarily (one Chinese patent application number: 200920093766.3); Dehydration is for the second time pulverized, and (one Chinese patent application number: 200820072472.8), effect is better, efficient is higher to use a kind of inorganic salt uniform calcination rotary kiln that the inventor designs voluntarily.Solve the vitriol dehydration that direct calcination contains crystal water and be prone to caking, has formed very hard block, be difficult to pulverizing, and the problem that long processing time, granularity are not easy greatly to control, cost is high.The ultrafine anhydrous sulfate that makes, globule size is controlled, and mean particle size can reach 2-10 μ m, and good dispersivity during as feed or the use of other additive, mixes, and production process is short, and output is high, and cost is low.
Embodiment
Embodiment 1 two-step approach prepares super-fine anhydrous rose vitriol
Dehydration for the first time: the rose vitriol xln that will contain 1 crystal water under 100 ℃ of temperature, expansion drying, pulverizing;
Dehydration for the second time: after expansion drying, the pulverizing, under 450 ℃ of temperature, roasting is ground.
Embodiment 2 two-step approachs prepare super-fine anhydrous rose vitriol
Dehydration for the first time: the rose vitriol xln that will contain 7 crystal water under 150 ℃ of temperature, expansion drying, pulverizing;
Dehydration for the second time: after expansion drying, the pulverizing, under 400 ℃ of temperature, roasting is ground.
Embodiment 3 two-step approachs prepare super-fine anhydrous rose vitriol
Dehydration for the first time, the rose vitriol xln that will contain 7 crystal water under 140 ℃ of temperature, expansion drying, pulverizing;
Dehydration for the second time, after the oven dry powder essence, under 420 ℃ of temperature, roasting is ground.
Embodiment 4 two-step approachs prepare super-fine anhydrous rose vitriol
Dehydration for the first time: with Chinese patent, (application number: 200920093766.3), temperature transfers to 130-140 ℃ to the drying and crushing all-in-one, and feeder adds the rose vitriol xln that contains crystal water and pulverizes, dries;
Dehydration for the second time: with Chinese patent, (application number: 200820072472.8), temperature transfers to 400-450 ℃ to a kind of inorganic salt uniform calcination rotary kiln, pours the rose vitriol after pulverizing, drying into feeding mechanism, carries out roasting, and the rod milling system grinds.
The super-fine anhydrous rose vitriol that embodiment 1-4 makes, globule size is controlled, and uniform particles, mean particle size can reach 2-10 μ m, and cobalt contents is about 30%; Good dispersivity, cobalt contents are stablized.
Embodiment 5
Two-step approach prepares super-fine anhydrous single nickel salt, copper sulfate, zinc sulfate, sal epsom or zirconium sulfate, and for the first time dehydration temperaturre is specifically seen table 1 with dehydration temperaturre for the second time, and other repeats embodiment 4.
The super-fine anhydrous single nickel salt, copper sulfate, zinc sulfate, sal epsom or the zirconium sulfate that make, globule size is controlled, and uniform particles, mean particle size can reach 2-10 μ m, good dispersivity.
Table 1
| The inorganic salt title | Dehydration temperaturre expansion drying, pulverizing for the first time | Dry, the pulverizing of dehydration temperaturre roasting for the second time |
| Single nickel salt (7 water or 6 water) | 100-150 | 300-350 |
| Copper sulfate (5 water) | 100 | 160-200 |
| Zinc sulfate (7 water) | 100-150 | 300-350 |
| Sal epsom (7 water) | 100-150 | 200-250 |
| Zirconium sulfate (4 water) | 100-150 | 300-350 |
Claims (6)
1. two-step approach prepares the method for ultrafine anhydrous sulfate, and it comprises:
Dehydration for the first time: the sulphate crystal body that will contain crystal water under temperature 100-150 ℃, expansion drying, pulverizing;
Dehydration for the second time: after expansion drying, the powder essence, roasting again, pulverizing;
Get the anhydrous sulfate of granularity 2-10 μ m;
Described vitriol is rose vitriol, single nickel salt, copper sulfate, zinc sulfate, sal epsom or zirconium sulfate.
2. two-step approach according to claim 1 prepares the method for ultrafine anhydrous sulfate, it is characterized in that: dehydration temperaturre for the second time: rose vitriol is 400-450 ℃, and zinc sulfate, zirconium sulfate, single nickel salt are 300-350 ℃, and sal epsom is 200-250 ℃; The dehydration temperaturre first time of copper sulfate is 100 ℃, and dehydration temperaturre is 160-200 ℃ for the second time.
3. two-step approach according to claim 1 and 2 prepares the method for ultrafine anhydrous sulfate, it is characterized in that: dehydration for the first time, use Chinese patent drying and crushing all-in-one, application number: and 200920093766.3, expansion drying, pulverizing.
4. two-step approach according to claim 3 prepares the method for ultrafine anhydrous sulfate, it is characterized in that: dehydration for the second time, use a kind of inorganic salt uniform calcination rotary kiln of Chinese patent, application number: and 200820072472.8, carry out roasting.
5. two-step approach according to claim 4 prepares the method for ultrafine anhydrous sulfate, it is characterized in that: the rose vitriol that contains crystal water is a heptahydrate.
6. two-step approach according to claim 5 prepares the method for ultrafine anhydrous sulfate, it is characterized in that: the dehydration temperaturre first time of heptahydrate is 130-140 ℃.
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| CN2010102144748A CN101885514B (en) | 2010-07-01 | 2010-07-01 | Preparation for ultrafine anhydrous sulfate by a two-step method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3377273A (en) * | 1965-02-17 | 1968-04-09 | Atomic Energy Authority Uk | Process and apparatus for desalination of an aqueous solution containing calcium sulphate |
| CN1327949A (en) * | 2000-06-08 | 2001-12-26 | 徐万清 | Cool-hot fusion method for preparing anhydrous sodium sulfate and its hot-fusion tower |
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| CN1810728A (en) * | 2005-11-02 | 2006-08-02 | 大连爱思凯矿产有限公司 | Natural granular magnesium sulfate fertilizer and its prepn process |
| CN201289292Y (en) * | 2008-09-19 | 2009-08-12 | 吉林市弗兰达科技股份有限公司 | Rotary kiln for uniform calcination of inorganic salt |
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-
2010
- 2010-07-01 CN CN2010102144748A patent/CN101885514B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3377273A (en) * | 1965-02-17 | 1968-04-09 | Atomic Energy Authority Uk | Process and apparatus for desalination of an aqueous solution containing calcium sulphate |
| CN1327949A (en) * | 2000-06-08 | 2001-12-26 | 徐万清 | Cool-hot fusion method for preparing anhydrous sodium sulfate and its hot-fusion tower |
| CN1544331A (en) * | 2003-11-14 | 2004-11-10 | 天津市昌昊化工股份合作公司 | Magnesium sulfate production method using magnesium oxide and desulfurated waste fluid |
| CN1810728A (en) * | 2005-11-02 | 2006-08-02 | 大连爱思凯矿产有限公司 | Natural granular magnesium sulfate fertilizer and its prepn process |
| CN201289292Y (en) * | 2008-09-19 | 2009-08-12 | 吉林市弗兰达科技股份有限公司 | Rotary kiln for uniform calcination of inorganic salt |
| CN201413016Y (en) * | 2009-06-09 | 2010-02-24 | 吕文广 | Drying and crushing combined machine |
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| Title |
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| 栾昊.旋转闪蒸干燥技术在盐化工生产中的应用.《中国井矿盐》.2003,第34卷(第06期),32-35. * |
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| CN101885514A (en) | 2010-11-17 |
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