IN153973B - - Google Patents
Info
- Publication number
- IN153973B IN153973B IN946/CAL/81A IN946CA1981A IN153973B IN 153973 B IN153973 B IN 153973B IN 946CA1981 A IN946CA1981 A IN 946CA1981A IN 153973 B IN153973 B IN 153973B
- Authority
- IN
- India
- Prior art keywords
- sub
- wash
- anhydrite
- gypsum
- liquor obtained
- Prior art date
Links
- 229910052925 anhydrite Inorganic materials 0.000 abstract 5
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 abstract 5
- 229910052602 gypsum Inorganic materials 0.000 abstract 5
- 239000010440 gypsum Substances 0.000 abstract 5
- 238000005406 washing Methods 0.000 abstract 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 abstract 2
- 239000013078 crystal Substances 0.000 abstract 2
- 230000029087 digestion Effects 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 abstract 1
- 238000010790 dilution Methods 0.000 abstract 1
- 239000012895 dilution Substances 0.000 abstract 1
- 239000002367 phosphate rock Substances 0.000 abstract 1
- 238000001953 recrystallisation Methods 0.000 abstract 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
- 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
- C01B25/2285—Dihydrate-anhydrite or hemihydrate-anhydrite process
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Paper (AREA)
- Removal Of Specific Substances (AREA)
- Catalysts (AREA)
- Materials For Medical Uses (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL8004058A NL8004058A (nl) | 1980-07-15 | 1980-07-15 | Werkwijze voor het bereiden van fosforzuur en calciumsulfaatanhydriet, alsmede fosforzuur en calciumsulfaatanhydriet verkregen volgens deze werkwijze. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| IN153973B true IN153973B (de) | 1984-09-08 |
Family
ID=19835625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IN946/CAL/81A IN153973B (de) | 1980-07-15 | 1981-08-25 |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US4362705A (de) |
| EP (1) | EP0044120B1 (de) |
| JP (1) | JPS5751108A (de) |
| AT (1) | ATE5646T1 (de) |
| DE (1) | DE3161703D1 (de) |
| ES (1) | ES503945A0 (de) |
| IN (1) | IN153973B (de) |
| NL (1) | NL8004058A (de) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4452770A (en) * | 1981-12-14 | 1984-06-05 | United States Gypsum Company | Phosphoanhydrite process |
| SE440069B (sv) * | 1982-12-22 | 1985-07-15 | Boliden Ab | Forfarande for omkristallisation av gips |
| SE8302591L (sv) * | 1983-05-06 | 1984-11-07 | Boliden Ab | Forfarande for framstellning av fibergips (ii) |
| SE8302590L (sv) * | 1983-05-06 | 1984-11-07 | Boliden Ab | Forfarande for framstellning av fibergips (i) |
| JPH0747902B2 (ja) * | 1986-07-09 | 1995-05-24 | レ アントルプリ−ズ トリツトン リミテ | ロツキングシ−ル |
| BR0114467B1 (pt) * | 2000-10-05 | 2010-11-03 | processo para reduzir um nìvel de radionúcleos em um material de fosfogesso tendo um contaminante radioativo. | |
| CN102976299B (zh) * | 2012-12-17 | 2014-10-15 | 四川大学 | 一种生产磷酸和洁净石膏的方法 |
| DE102020100249A1 (de) | 2020-01-08 | 2021-07-08 | Thyssenkrupp Ag | Integriertes Verfahren zur kommerziellen und industriellen Verwertung von Kalziumsulfat unter Gewinnung von Seltenen Erden aus der Phosphorsäureproduktion |
| DE102020100241A1 (de) | 2020-01-08 | 2021-07-08 | Thyssenkrupp Ag | Verfahren zur Herstellung von Phosphorsäure und Klinkerprozess-geeigneter Kalziumsulfatqualität zur kommerziellen und industriellen Verwertung von Kalziumsulfat |
| CN111732086A (zh) * | 2020-07-31 | 2020-10-02 | 天宝动物营养科技股份有限公司 | 一种半水-二水法制备磷酸联产高纯石膏工艺 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2531977A (en) * | 1948-01-22 | 1950-11-28 | Allied Chem & Dye Corp | Process for manufacture of phosphoric acid |
| BE756759A (fr) * | 1969-09-30 | 1971-03-29 | Pechiney Saint Gobain | Procede de fabrication d'acide phosphorique de voie humide et de sulfate de calcium de qualite amelioree |
| NL7812109A (nl) * | 1978-12-13 | 1980-06-17 | Stamicarbon | Werkwijze voor het bereiden van calciumsulfaat- anhydriet en calciumsulfaatanhydriet verkregen volgens deze werkwijze. |
-
1980
- 1980-07-15 NL NL8004058A patent/NL8004058A/nl not_active Application Discontinuation
-
1981
- 1981-07-14 DE DE8181200814T patent/DE3161703D1/de not_active Expired
- 1981-07-14 AT AT81200814T patent/ATE5646T1/de not_active IP Right Cessation
- 1981-07-14 ES ES503945A patent/ES503945A0/es active Granted
- 1981-07-14 EP EP81200814A patent/EP0044120B1/de not_active Expired
- 1981-07-15 US US06/283,723 patent/US4362705A/en not_active Expired - Fee Related
- 1981-07-15 JP JP56110643A patent/JPS5751108A/ja active Pending
- 1981-08-25 IN IN946/CAL/81A patent/IN153973B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| EP0044120B1 (de) | 1983-12-21 |
| US4362705A (en) | 1982-12-07 |
| EP0044120A3 (en) | 1982-01-27 |
| NL8004058A (nl) | 1982-02-16 |
| DE3161703D1 (en) | 1984-01-26 |
| EP0044120A2 (de) | 1982-01-20 |
| ES8206374A1 (es) | 1982-08-16 |
| JPS5751108A (en) | 1982-03-25 |
| ATE5646T1 (de) | 1984-01-15 |
| ES503945A0 (es) | 1982-08-16 |
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| IN153973B (de) | ||
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