CN105217590B - 一种生产湿法磷酸副产α半水石膏和高纯度高白度α半水石膏的方法 - Google Patents
一种生产湿法磷酸副产α半水石膏和高纯度高白度α半水石膏的方法 Download PDFInfo
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- CN105217590B CN105217590B CN201510595122.4A CN201510595122A CN105217590B CN 105217590 B CN105217590 B CN 105217590B CN 201510595122 A CN201510595122 A CN 201510595122A CN 105217590 B CN105217590 B CN 105217590B
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- phosphoric acid
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- sulfuric acid
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- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 title claims abstract description 268
- 229910000147 aluminium phosphate Inorganic materials 0.000 title claims abstract description 134
- 239000010440 gypsum Substances 0.000 title claims abstract description 72
- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 71
- 238000000034 method Methods 0.000 title claims abstract description 67
- 230000008569 process Effects 0.000 title claims abstract description 28
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
- 239000006227 byproduct Substances 0.000 title claims abstract description 25
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 255
- 238000006243 chemical reaction Methods 0.000 claims abstract description 135
- 239000007787 solid Substances 0.000 claims abstract description 115
- 239000013078 crystal Substances 0.000 claims abstract description 40
- 238000000605 extraction Methods 0.000 claims abstract description 36
- 239000002367 phosphate rock Substances 0.000 claims abstract description 35
- 239000006210 lotion Substances 0.000 claims abstract description 32
- 238000005406 washing Methods 0.000 claims abstract description 32
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000011574 phosphorus Substances 0.000 claims abstract description 28
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 28
- 238000000926 separation method Methods 0.000 claims abstract description 28
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910001424 calcium ion Inorganic materials 0.000 claims abstract description 25
- 238000002386 leaching Methods 0.000 claims abstract description 25
- 239000003607 modifier Substances 0.000 claims abstract description 22
- 150000004683 dihydrates Chemical class 0.000 claims abstract description 13
- YYRMJZQKEFZXMX-UHFFFAOYSA-L calcium bis(dihydrogenphosphate) Chemical compound [Ca+2].OP(O)([O-])=O.OP(O)([O-])=O YYRMJZQKEFZXMX-UHFFFAOYSA-L 0.000 claims abstract description 10
- 235000019691 monocalcium phosphate Nutrition 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims description 74
- 239000000706 filtrate Substances 0.000 claims description 60
- 239000000203 mixture Substances 0.000 claims description 46
- 239000000047 product Substances 0.000 claims description 40
- 238000006396 nitration reaction Methods 0.000 claims description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 29
- 238000007865 diluting Methods 0.000 claims description 20
- 239000002253 acid Substances 0.000 claims description 18
- 239000000126 substance Substances 0.000 claims description 18
- 239000002002 slurry Substances 0.000 claims description 17
- DLYUQMMRRRQYAE-UHFFFAOYSA-N phosphorus pentoxide Inorganic materials O1P(O2)(=O)OP3(=O)OP1(=O)OP2(=O)O3 DLYUQMMRRRQYAE-UHFFFAOYSA-N 0.000 claims description 14
- 238000001035 drying Methods 0.000 claims description 13
- 229940062672 calcium dihydrogen phosphate Drugs 0.000 claims description 9
- 229910000389 calcium phosphate Inorganic materials 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 8
- -1 wherein Substances 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 6
- KRKNYBCHXYNGOX-UHFFFAOYSA-K Citrate Chemical compound [O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O KRKNYBCHXYNGOX-UHFFFAOYSA-K 0.000 claims description 5
- 229910019142 PO4 Inorganic materials 0.000 claims description 5
- 230000035484 reaction time Effects 0.000 claims description 5
- 238000012546 transfer Methods 0.000 claims description 5
- 206010013786 Dry skin Diseases 0.000 claims description 4
- 229910002651 NO3 Inorganic materials 0.000 claims description 3
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 3
- 239000010452 phosphate Substances 0.000 claims description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 3
- 150000002500 ions Chemical class 0.000 claims description 2
- 150000001335 aliphatic alkanes Chemical class 0.000 claims 1
- 239000000344 soap Substances 0.000 claims 1
- 238000009776 industrial production Methods 0.000 abstract description 4
- 230000009466 transformation Effects 0.000 abstract 4
- 239000001506 calcium phosphate Substances 0.000 abstract 1
- 229910000150 monocalcium phosphate Inorganic materials 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 45
- 230000008676 import Effects 0.000 description 44
- 238000010790 dilution Methods 0.000 description 42
- 239000012895 dilution Substances 0.000 description 42
- 239000002994 raw material Substances 0.000 description 21
- 239000000284 extract Substances 0.000 description 15
- 239000000843 powder Substances 0.000 description 11
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 8
- 239000005864 Sulphur Substances 0.000 description 8
- 239000001509 sodium citrate Substances 0.000 description 8
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 description 8
- 230000006835 compression Effects 0.000 description 7
- 238000007906 compression Methods 0.000 description 7
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 6
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 description 6
- VCJMYUPGQJHHFU-UHFFFAOYSA-N iron(3+);trinitrate Chemical compound [Fe+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VCJMYUPGQJHHFU-UHFFFAOYSA-N 0.000 description 6
- 229910000360 iron(III) sulfate Inorganic materials 0.000 description 6
- YIXJRHPUWRPCBB-UHFFFAOYSA-N magnesium nitrate Chemical compound [Mg+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O YIXJRHPUWRPCBB-UHFFFAOYSA-N 0.000 description 6
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 5
- 244000248349 Citrus limon Species 0.000 description 5
- 235000005979 Citrus limon Nutrition 0.000 description 5
- NJXVPIZBZLQQPB-UHFFFAOYSA-N N1=CC=CC2=CC=CC=C12.[Mo] Chemical compound N1=CC=CC2=CC=CC=C12.[Mo] NJXVPIZBZLQQPB-UHFFFAOYSA-N 0.000 description 5
- 229960005069 calcium Drugs 0.000 description 5
- 239000011575 calcium Substances 0.000 description 5
- 229910052791 calcium Inorganic materials 0.000 description 5
- 239000006071 cream Substances 0.000 description 5
- 238000001514 detection method Methods 0.000 description 5
- 150000002576 ketones Chemical class 0.000 description 5
- 238000000879 optical micrograph Methods 0.000 description 5
- 239000004575 stone Substances 0.000 description 5
- 239000000725 suspension Substances 0.000 description 5
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 description 4
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
- 238000011031 large-scale manufacturing process Methods 0.000 description 4
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000011505 plaster Substances 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- 229910052708 sodium Inorganic materials 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 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 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 125000000217 alkyl group Chemical group 0.000 description 2
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 description 2
- SNRUBQQJIBEYMU-UHFFFAOYSA-N dodecane Chemical compound CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000011268 mixed slurry Substances 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 239000004291 sulphur dioxide Substances 0.000 description 2
- 235000010269 sulphur dioxide Nutrition 0.000 description 2
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 2
- 241000132536 Cirsium Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 229910052925 anhydrite Inorganic materials 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000013064 chemical raw material Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- SEGLCEQVOFDUPX-UHFFFAOYSA-N di-(2-ethylhexyl)phosphoric acid Chemical compound CCCCC(CC)COP(O)(=O)OCC(CC)CCCC SEGLCEQVOFDUPX-UHFFFAOYSA-N 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 208000021302 gastroesophageal reflux disease Diseases 0.000 description 1
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 229930002839 ionone Natural products 0.000 description 1
- 150000002499 ionone derivatives Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000012066 reaction slurry Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 230000000192 social effect Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/26—Phosphates
- C01B25/32—Phosphates of magnesium, calcium, strontium, or barium
- C01B25/321—Methods for converting an alkaline earth metal ortho-phosphate into another ortho-phosphate
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/18—Phosphoric acid
- C01B25/22—Preparation by reacting phosphate-containing material with an acid, e.g. wet process
- C01B25/222—Preparation by reacting phosphate-containing material with an acid, e.g. wet process with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen
- C01B25/228—Preparation by reacting phosphate-containing material with an acid, e.g. wet process with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen one form of calcium sulfate being formed and then converted to another form
- C01B25/231—Dihydrate-hemihydrate process
-
- 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
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/46—Sulfates
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
Description
Claims (11)
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201510595122.4A CN105217590B (zh) | 2015-09-18 | 2015-09-18 | 一种生产湿法磷酸副产α半水石膏和高纯度高白度α半水石膏的方法 |
US15/760,822 US10696552B2 (en) | 2015-09-18 | 2016-08-26 | Method for producing wet-process phosphoric acid and by-producing alpha-hemihydrate gypsum and high-purity and high-whiteness alpha-hemihydrate gypsum |
EP16845633.3A EP3351507B1 (en) | 2015-09-18 | 2016-08-26 | Method for producing wet-process phosphoric acid and by-producing alpha-hemihydrate gypsum and high-purity and high-whiteness alpha-hemihydrate gypsum |
LTEP16845633.3T LT3351507T (lt) | 2015-09-18 | 2016-08-26 | Fosforo rūgšties šlapio gaminimo ir alfa himehidrato gipso ir grynojo, baltojo alfa hemihidrato gipso, kaip šalutinių produktų, gamybos būdas |
RU2018113282A RU2690358C1 (ru) | 2015-09-18 | 2016-08-26 | Способ производства экстракционной фосфорной кислоты с полученем в качестве побочного продукта альфа-полуводного гипса и альфа-полуводного гипса с высокой степенью чистоты и высокой степенью белизны |
PCT/CN2016/096923 WO2017045519A1 (zh) | 2015-09-18 | 2016-08-26 | 一种生产湿法磷酸副产α半水石膏和高纯度高白度α半水石膏的方法 |
CA2998905A CA2998905C (en) | 2015-09-18 | 2016-08-26 | Method for producing wet-process phosphoric acid and by-producing alpha-hemihydrate gypsum and high-purity and high-whiteness alpha-hemihydrate gypsum |
SA518391137A SA518391137B1 (ar) | 2015-09-18 | 2018-03-18 | طريقة لتحضير جبس شديد البياض وعالي النقاوة |
Applications Claiming Priority (1)
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CN201510595122.4A CN105217590B (zh) | 2015-09-18 | 2015-09-18 | 一种生产湿法磷酸副产α半水石膏和高纯度高白度α半水石膏的方法 |
Publications (2)
Publication Number | Publication Date |
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CN105217590A CN105217590A (zh) | 2016-01-06 |
CN105217590B true CN105217590B (zh) | 2017-05-10 |
Family
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Family Applications (1)
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CN201510595122.4A Active CN105217590B (zh) | 2015-09-18 | 2015-09-18 | 一种生产湿法磷酸副产α半水石膏和高纯度高白度α半水石膏的方法 |
Country Status (8)
Country | Link |
---|---|
US (1) | US10696552B2 (zh) |
EP (1) | EP3351507B1 (zh) |
CN (1) | CN105217590B (zh) |
CA (1) | CA2998905C (zh) |
LT (1) | LT3351507T (zh) |
RU (1) | RU2690358C1 (zh) |
SA (1) | SA518391137B1 (zh) |
WO (1) | WO2017045519A1 (zh) |
Families Citing this family (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105217590B (zh) * | 2015-09-18 | 2017-05-10 | 金正大诺泰尔化学有限公司 | 一种生产湿法磷酸副产α半水石膏和高纯度高白度α半水石膏的方法 |
CN105776303A (zh) * | 2016-01-30 | 2016-07-20 | 瓮福(集团)有限责任公司 | 一种α型半水石膏的生产方法 |
CN105883886B (zh) * | 2016-03-31 | 2018-03-20 | 武汉理工大学 | 一种利用盐化工副产物制备高纯α‑半水石膏粉的方法 |
CN105948009B (zh) * | 2016-04-28 | 2017-09-29 | 昆明川金诺化工股份有限公司 | 一种节能半水‑二水湿法磷酸联产白石膏的方法 |
CN106044826A (zh) * | 2016-05-26 | 2016-10-26 | 东南大学 | 一种用于生产α型高强石膏的转晶剂 |
CN106185853B (zh) * | 2016-07-19 | 2018-03-16 | 中化化肥有限公司成都研发中心 | 生产饲料级湿法净化磷酸联产高纯度高白度半水石膏的方法 |
CN106590065A (zh) * | 2017-01-17 | 2017-04-26 | 荆门市磊鑫石膏制品有限公司 | 一种复合钛白粉的制备方法 |
CN110240428B (zh) * | 2019-06-14 | 2022-03-11 | 武汉理工大学 | 一种利用电石渣改性磷矿制备α高强石膏的方法 |
CN110372236B (zh) * | 2019-08-14 | 2020-09-08 | 江苏一夫科技股份有限公司 | 一种脱硫灰制备α型半水石膏的方法及其产品 |
CN110528060A (zh) * | 2019-08-28 | 2019-12-03 | 三明学院 | 氟石膏渣生长硫酸钙晶须的方法及硫酸钙晶须 |
CN111392755A (zh) * | 2019-09-27 | 2020-07-10 | 黔南民族师范学院 | 一种磺化煤油煅烧法净化磷石膏的工艺 |
CN110777435B (zh) * | 2019-11-20 | 2020-11-13 | 四川康升晶须科技有限公司 | 一种电石渣净化制备死烧型硫酸钙晶须的方法 |
CN110902665B (zh) * | 2019-12-12 | 2022-11-15 | 昆明川金诺化工股份有限公司 | 一种提高半水磷酸浓度和洗涤率的方法 |
CN111533154B (zh) * | 2020-04-21 | 2023-06-02 | 贵州大学 | 一种硝酸分解磷矿酸解液除钙副产α高强石膏的方法 |
CN112279540B (zh) * | 2020-09-22 | 2022-05-03 | 湖北国创高新材料股份有限公司 | 一种利用磷石膏生产α-半水石膏的方法 |
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CN113185160B (zh) * | 2021-04-21 | 2022-03-29 | 中国五环工程有限公司 | 控制半水石膏粗大结晶的方法 |
CN113173566B (zh) * | 2021-04-21 | 2022-03-25 | 中国五环工程有限公司 | 一种高收率水合晶相重构湿法磷酸生产工艺 |
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CN114275803A (zh) * | 2022-01-28 | 2022-04-05 | 贵州大学 | 硝酸磷肥工艺冷冻酸解液深度除钙副产α高强石膏的方法 |
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CA2998905A1 (en) | 2017-03-23 |
RU2690358C1 (ru) | 2019-05-31 |
CN105217590A (zh) | 2016-01-06 |
EP3351507A4 (en) | 2019-03-27 |
EP3351507B1 (en) | 2020-06-10 |
SA518391137B1 (ar) | 2021-11-17 |
US10696552B2 (en) | 2020-06-30 |
LT3351507T (lt) | 2020-08-10 |
EP3351507A1 (en) | 2018-07-25 |
WO2017045519A1 (zh) | 2017-03-23 |
US20180273384A1 (en) | 2018-09-27 |
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