NO133266B - - Google Patents
Download PDFInfo
- Publication number
- NO133266B NO133266B NO740983A NO740983A NO133266B NO 133266 B NO133266 B NO 133266B NO 740983 A NO740983 A NO 740983A NO 740983 A NO740983 A NO 740983A NO 133266 B NO133266 B NO 133266B
- Authority
- NO
- Norway
- Prior art keywords
- stage
- evaporation
- concentration
- phosphoric acid
- mother liquor
- Prior art date
Links
- 238000000034 method Methods 0.000 claims description 44
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 42
- 239000012452 mother liquor Substances 0.000 claims description 32
- 238000001704 evaporation Methods 0.000 claims description 29
- 230000008020 evaporation Effects 0.000 claims description 29
- 239000011575 calcium Substances 0.000 claims description 26
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 21
- 238000004519 manufacturing process Methods 0.000 claims description 16
- 229910052698 phosphorus Inorganic materials 0.000 claims description 15
- 238000000576 coating method Methods 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 8
- 239000001506 calcium phosphate Substances 0.000 claims description 5
- 235000011010 calcium phosphates Nutrition 0.000 claims description 5
- ABTOQLMXBSRXSM-UHFFFAOYSA-N silicon tetrafluoride Chemical compound F[Si](F)(F)F ABTOQLMXBSRXSM-UHFFFAOYSA-N 0.000 claims description 5
- 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 claims description 5
- 229910004014 SiF4 Inorganic materials 0.000 claims description 3
- 229910000389 calcium phosphate Inorganic materials 0.000 claims description 2
- 239000000834 fixative Substances 0.000 abstract 1
- 239000000417 fungicide Substances 0.000 abstract 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 19
- 229910052791 calcium Inorganic materials 0.000 description 19
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 17
- 229910017604 nitric acid Inorganic materials 0.000 description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 13
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 12
- 229910052731 fluorine Inorganic materials 0.000 description 12
- 239000011737 fluorine Substances 0.000 description 12
- 239000007788 liquid Substances 0.000 description 10
- 229910019142 PO4 Inorganic materials 0.000 description 9
- 239000000203 mixture Substances 0.000 description 9
- 235000021317 phosphate Nutrition 0.000 description 9
- 230000029087 digestion Effects 0.000 description 7
- 238000002156 mixing Methods 0.000 description 7
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 6
- 229910002651 NO3 Inorganic materials 0.000 description 6
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 6
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 6
- 239000010452 phosphate Substances 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- 239000000377 silicon dioxide Substances 0.000 description 6
- 238000005406 washing Methods 0.000 description 6
- 239000007791 liquid phase Substances 0.000 description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- 150000002222 fluorine compounds Chemical class 0.000 description 4
- 239000011574 phosphorus Substances 0.000 description 4
- 238000001556 precipitation Methods 0.000 description 4
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 3
- 229910001868 water Inorganic materials 0.000 description 3
- ZHJGWYRLJUCMRT-UHFFFAOYSA-N 5-[6-[(4-methylpiperazin-1-yl)methyl]benzimidazol-1-yl]-3-[1-[2-(trifluoromethyl)phenyl]ethoxy]thiophene-2-carboxamide Chemical compound C=1C=CC=C(C(F)(F)F)C=1C(C)OC(=C(S1)C(N)=O)C=C1N(C1=C2)C=NC1=CC=C2CN1CCN(C)CC1 ZHJGWYRLJUCMRT-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 description 2
- IWOUKMZUPDVPGQ-UHFFFAOYSA-N barium nitrate Chemical compound [Ba+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O IWOUKMZUPDVPGQ-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 150000002823 nitrates Chemical class 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910021653 sulphate ion Inorganic materials 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- AYJRCSIUFZENHW-DEQYMQKBSA-L barium(2+);oxomethanediolate Chemical compound [Ba+2].[O-][14C]([O-])=O AYJRCSIUFZENHW-DEQYMQKBSA-L 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Inorganic materials [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 description 1
- YYRMJZQKEFZXMX-UHFFFAOYSA-N calcium;phosphoric acid Chemical compound [Ca+2].OP(O)(O)=O.OP(O)(O)=O YYRMJZQKEFZXMX-UHFFFAOYSA-N 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000010327 methods by industry Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011541 reaction mixture Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
- 239000002426 superphosphate Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 239000012808 vapor phase 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
- C01B25/18—Phosphoric acid
- C01B25/22—Preparation by reacting phosphate-containing material with an acid, e.g. wet process
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
- A23K20/00—Accessory food factors for animal feeding-stuffs
- A23K20/20—Inorganic substances, e.g. oligoelements
- A23K20/26—Compounds containing phosphorus
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S426/00—Food or edible material: processes, compositions, and products
- Y10S426/807—Poultry or ruminant feed
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S71/00—Chemistry: fertilizers
- Y10S71/03—Defluorination
Landscapes
- Chemical & Material Sciences (AREA)
- Polymers & Plastics (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Food Science & Technology (AREA)
- Zoology (AREA)
- Engineering & Computer Science (AREA)
- Animal Husbandry (AREA)
- Removal Of Specific Substances (AREA)
- Fuel Cell (AREA)
- Fertilizers (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Priority Applications (26)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO740983A NO133266C (de) | 1974-03-19 | 1974-03-19 | |
| GB10094/75A GB1499584A (en) | 1974-03-19 | 1975-03-11 | Process for manufacturing phosphoric acid |
| IE524/75A IE40770B1 (en) | 1974-03-19 | 1975-03-11 | Process for manufacturing phosphoric acid |
| IN479/CAL/1975A IN143137B (de) | 1974-03-19 | 1975-03-12 | |
| YU00617/75A YU61775A (en) | 1974-03-19 | 1975-03-13 | Process for preparing phosphoric acid |
| IL46826A IL46826A (en) | 1974-03-19 | 1975-03-13 | Process for the production of phosphoric acid containing calcium phosphates |
| AU79104/75A AU484510B2 (en) | 1974-03-19 | 1975-03-14 | Process for manufacturing of phosphoric acid |
| SE7502983A SE405963B (sv) | 1974-03-19 | 1975-03-17 | Forfarande for framstellning av kalciumfosfathaltig fosforsyra |
| EG137/75A EG11662A (en) | 1974-03-19 | 1975-03-17 | Process for manufacturing of phosphoric acid |
| IT48635/75A IT1032331B (it) | 1974-03-19 | 1975-03-17 | Procedimento per produrre acido fosforico |
| RO7581690A RO69799A (ro) | 1974-03-19 | 1975-03-18 | Procedeu de obtinere a acidului gosfor&c cu continut de fosfat de calciu |
| ES435727A ES435727A1 (es) | 1974-03-19 | 1975-03-18 | Un procedimiento para la obtencion de acido fosforico que contiene fosfatos de calcio. |
| TR18344A TR18344A (tr) | 1974-03-19 | 1975-03-18 | Fosforik asit imali icin usul |
| NLAANVRAGE7503210,A NL178861C (nl) | 1974-03-19 | 1975-03-18 | Werkwijze voor het bereiden van calciumfosfaten bevattend fosforzuur. |
| DK109475AA DK134899B (da) | 1974-03-19 | 1975-03-18 | Fremgangsmåde til fremstilling af calciumphophatholdig phosphorsyre. |
| CA222,443A CA1044437A (en) | 1974-03-19 | 1975-03-18 | Process for manufacturing of phosphoric acid |
| SU752115255A SU692554A3 (ru) | 1974-03-19 | 1975-03-18 | Способ получени фосфорной кислоты |
| HU75NO00000189A HU171316B (hu) | 1974-03-19 | 1975-03-18 | Sposob poluchenija fosfornoj kisloty soderzhahhej kal'cij putjom vyparivanija |
| DE752511801A DE2511801C3 (de) | 1974-03-19 | 1975-03-18 | Verfahren zur Herstellung von calciumphosphathaltiger Phosphorsäure |
| BR1597/75A BR7501597A (pt) | 1974-03-19 | 1975-03-18 | Processo para a producao de acido fosforico contendo fosfatos de calcio |
| FR7508456A FR2264773B1 (de) | 1974-03-19 | 1975-03-18 | |
| FI750783A FI58766C (fi) | 1974-03-19 | 1975-03-18 | Foerfarande foer framstaellning av en renad kalsiumfosfathaltig fosforsyra ur raosyra fraon odda-processen |
| US05/560,089 US4043789A (en) | 1974-03-19 | 1975-03-19 | Process for manufacturing of phosphoric acid |
| JP50032499A JPS511394A (de) | 1974-03-19 | 1975-03-19 | |
| BE154502A BE826880A (fr) | 1974-03-19 | 1975-03-19 | Procede de production d'acide phosphorique |
| DD184876A DD116204A5 (de) | 1974-03-19 | 1975-03-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO740983A NO133266C (de) | 1974-03-19 | 1974-03-19 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| NO740983L NO740983L (de) | 1975-09-22 |
| NO133266B true NO133266B (de) | 1975-12-29 |
| NO133266C NO133266C (de) | 1976-04-07 |
Family
ID=19881519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO740983A NO133266C (de) | 1974-03-19 | 1974-03-19 |
Country Status (25)
| Country | Link |
|---|---|
| US (1) | US4043789A (de) |
| JP (1) | JPS511394A (de) |
| BE (1) | BE826880A (de) |
| BR (1) | BR7501597A (de) |
| CA (1) | CA1044437A (de) |
| DD (1) | DD116204A5 (de) |
| DE (1) | DE2511801C3 (de) |
| DK (1) | DK134899B (de) |
| EG (1) | EG11662A (de) |
| ES (1) | ES435727A1 (de) |
| FI (1) | FI58766C (de) |
| FR (1) | FR2264773B1 (de) |
| GB (1) | GB1499584A (de) |
| HU (1) | HU171316B (de) |
| IE (1) | IE40770B1 (de) |
| IL (1) | IL46826A (de) |
| IN (1) | IN143137B (de) |
| IT (1) | IT1032331B (de) |
| NL (1) | NL178861C (de) |
| NO (1) | NO133266C (de) |
| RO (1) | RO69799A (de) |
| SE (1) | SE405963B (de) |
| SU (1) | SU692554A3 (de) |
| TR (1) | TR18344A (de) |
| YU (1) | YU61775A (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5650527A (en) * | 1979-09-29 | 1981-05-07 | Fujitsu Ltd | Semiconductor integrated circuit device |
| JPS6161468A (ja) * | 1984-08-31 | 1986-03-29 | Seiko Epson Corp | 静電気保護回路 |
| FR2825357B1 (fr) * | 2001-05-31 | 2004-04-30 | Cit Alcatel | Procede de dopage de la silice par du fluor |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2091898A (en) * | 1933-07-07 | 1937-08-31 | Dorr Co Inc | Crystallization |
| US2689175A (en) * | 1952-03-07 | 1954-09-14 | Chemical Construction Corp | Production of nitrogenous fertilizers |
| US3002812A (en) * | 1959-02-19 | 1961-10-03 | Int Minerals & Chem Corp | Manufacture of defluorinated phosphates |
| US3099530A (en) * | 1959-12-08 | 1963-07-30 | Int Minerals & Chem Corp | Manufacture of defluorinated phosphates |
| US3151941A (en) * | 1960-05-02 | 1964-10-06 | Smith Douglass Company Inc | Defluorination of peosphoric acid |
| US3205062A (en) * | 1962-03-12 | 1965-09-07 | St Paul Ammonia Products Inc | Nitric acid acidulation of phosphate rock |
| US3195980A (en) * | 1962-03-30 | 1965-07-20 | St Paul Ammonia Products Inc | Nitrate removal from phosphoric acid liquors |
| GB1057643A (en) * | 1963-03-14 | 1967-02-01 | Armour & Co | Concentrated phosphoric acid |
| US3416889A (en) * | 1964-06-22 | 1968-12-17 | Whiting Corp | Process and apparatus for manufacturing phosphoric acid |
| US3939248A (en) * | 1964-06-22 | 1976-02-17 | Whiting Corporation | Process and apparatus for manufacturing phosphoric acid |
| US3463609A (en) * | 1967-05-04 | 1969-08-26 | Raymond W Garris | Phosphoric acid production |
| US3528771A (en) * | 1967-10-10 | 1970-09-15 | Int Minerals & Chem Corp | Phosphoric acid clarification |
| US3620979A (en) * | 1968-04-24 | 1971-11-16 | Fmc Corp | Process of forming free-flowing, particulate mixtures of phosphates and silicates |
| US3615195A (en) * | 1968-12-11 | 1971-10-26 | Simplot Co J R | Fluosilic acid recovery |
| US3515534A (en) * | 1969-09-30 | 1970-06-02 | Tennessee Valley Authority | Recycling ammonium sulfate in nitric phosphate processing |
| US3802846A (en) * | 1971-05-21 | 1974-04-09 | Pullman Inc | Crystallizer apparatus |
-
1974
- 1974-03-19 NO NO740983A patent/NO133266C/no unknown
-
1975
- 1975-03-11 IE IE524/75A patent/IE40770B1/xx unknown
- 1975-03-11 GB GB10094/75A patent/GB1499584A/en not_active Expired
- 1975-03-12 IN IN479/CAL/1975A patent/IN143137B/en unknown
- 1975-03-13 YU YU00617/75A patent/YU61775A/xx unknown
- 1975-03-13 IL IL46826A patent/IL46826A/en unknown
- 1975-03-17 IT IT48635/75A patent/IT1032331B/it active
- 1975-03-17 EG EG137/75A patent/EG11662A/xx active
- 1975-03-17 SE SE7502983A patent/SE405963B/xx unknown
- 1975-03-18 HU HU75NO00000189A patent/HU171316B/hu not_active IP Right Cessation
- 1975-03-18 DE DE752511801A patent/DE2511801C3/de not_active Expired
- 1975-03-18 FI FI750783A patent/FI58766C/fi not_active IP Right Cessation
- 1975-03-18 BR BR1597/75A patent/BR7501597A/pt unknown
- 1975-03-18 TR TR18344A patent/TR18344A/xx unknown
- 1975-03-18 FR FR7508456A patent/FR2264773B1/fr not_active Expired
- 1975-03-18 ES ES435727A patent/ES435727A1/es not_active Expired
- 1975-03-18 CA CA222,443A patent/CA1044437A/en not_active Expired
- 1975-03-18 RO RO7581690A patent/RO69799A/ro unknown
- 1975-03-18 NL NLAANVRAGE7503210,A patent/NL178861C/xx not_active IP Right Cessation
- 1975-03-18 SU SU752115255A patent/SU692554A3/ru active
- 1975-03-18 DK DK109475AA patent/DK134899B/da unknown
- 1975-03-19 DD DD184876A patent/DD116204A5/xx unknown
- 1975-03-19 BE BE154502A patent/BE826880A/xx unknown
- 1975-03-19 US US05/560,089 patent/US4043789A/en not_active Expired - Lifetime
- 1975-03-19 JP JP50032499A patent/JPS511394A/ja active Pending
Also Published As
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4299804A (en) | Removal of magnesium and aluminum impurities from wet process phosphoric acid | |
| US5427757A (en) | Process for the production of phosphoric acid and hydrogen fluoride from phosphate rock and fluosilicic acid | |
| NO155038B (no) | Fremgangsmaate til fremstilling av et topisk preparat av 9- (2-hydroksy)-metyl guanin (acyclovir). | |
| US4062930A (en) | Method of production of anhydrous hydrogen fluoride | |
| US5165907A (en) | Method of production of high purity silica and ammonium fluoride | |
| US3273713A (en) | Removal of fluorine compounds from phosphoric acid | |
| US2905535A (en) | Phosphoric acid concentration | |
| US3005684A (en) | Process for making ammonium bifluoride | |
| US3494736A (en) | Process for removing silicon,aluminum and fluorine from wet process phosphoric acid | |
| US4292043A (en) | Process for working up effluent containing ammonium sulphate | |
| US2891856A (en) | Manufacture of fertilizer from wetprocess phosphoric acid and ammonia | |
| US5531975A (en) | Process for the production of phosphoric acid and calcium fluoride | |
| NO133266B (de) | ||
| US2141773A (en) | Recovery of fluorine compounds from water vapor containing volatile fluorine compounds | |
| US4965061A (en) | Process for removing fluoride from a wastewater and producing hydrofluoric acid therefrom | |
| TWI535662B (zh) | Method for recovering dihydrate gypsum from ammonium sulfate | |
| US3947499A (en) | Phosphoric acid purification | |
| US4062929A (en) | Production of hydrogen fluoride | |
| CN85100373B (zh) | 矿盐溶卤联产精盐和硫酸钠 | |
| US3363978A (en) | Process for recovering phosphoric acid from aqueous solutions containing nitric acid and phosphoric acid | |
| CN108946767B (zh) | 一种钠钾硫氯四元体系分离硫酸钾的方法 | |
| NO138526B (no) | Fremgangsmaate for rensning av fosforsyre | |
| US3205062A (en) | Nitric acid acidulation of phosphate rock | |
| US2148429A (en) | Production of alkali and alkaline earth metal nitrates | |
| US2385208A (en) | Process for recovering fluorine compounds |