BE796739A - Procede de fabrication de sulfate de calcium pur dans l'attaque humide a l'acide phosphorique - Google Patents
Procede de fabrication de sulfate de calcium pur dans l'attaque humide a l'acide phosphoriqueInfo
- Publication number
- BE796739A BE796739A BE128765A BE128765A BE796739A BE 796739 A BE796739 A BE 796739A BE 128765 A BE128765 A BE 128765A BE 128765 A BE128765 A BE 128765A BE 796739 A BE796739 A BE 796739A
- Authority
- BE
- Belgium
- Prior art keywords
- phosphoric acid
- calcium sulphate
- pure calcium
- manufacturing pure
- wet attack
- Prior art date
Links
Classifications
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/08—Compounds containing halogen
- C01B33/10—Compounds containing silicon, fluorine, and other elements
- C01B33/103—Fluosilicic acid; Salts thereof
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Silicates, Zeolites, And Molecular Sieves (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2218382A DE2218382C3 (de) | 1972-04-15 | 1972-04-15 | Verfahren zur Herstellung von reinem Calciumsulfat beim Phosphorsäurenaßaufschluß |
Publications (1)
Publication Number | Publication Date |
---|---|
BE796739A true BE796739A (fr) | 1973-07-02 |
Family
ID=5842129
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE128765A BE796739A (fr) | 1972-04-15 | 1973-03-14 | Procede de fabrication de sulfate de calcium pur dans l'attaque humide a l'acide phosphorique |
Country Status (6)
Country | Link |
---|---|
US (1) | US3949047A (fr) |
JP (1) | JPS4920093A (fr) |
BE (1) | BE796739A (fr) |
DE (1) | DE2218382C3 (fr) |
FR (1) | FR2180760B1 (fr) |
GB (1) | GB1378133A (fr) |
Families Citing this family (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4049866A (en) * | 1973-05-11 | 1977-09-20 | United States Gypsum Company | By-product gypsum fillers for mica-free joint compounds |
JPS5297389A (en) * | 1976-02-13 | 1977-08-16 | Toyo Soda Mfg Co Ltd | Removal of sulfate ion in extracted phosphoric acid |
US4055626A (en) * | 1976-06-15 | 1977-10-25 | Pennzoil Company | Method of producing fluoride-free phosphoric acid |
US4191734A (en) * | 1976-06-15 | 1980-03-04 | Pennzoil Company | Fluoride-free phosphate reactions |
US4060586A (en) * | 1976-06-15 | 1977-11-29 | Pennzoil Company | Recovery of fluorides from gypsum |
US4146568A (en) * | 1977-08-01 | 1979-03-27 | Olin Corporation | Process for reducing radioactive contamination in waste product gypsum |
JPS5718351Y2 (fr) * | 1977-08-24 | 1982-04-16 | ||
CA1115483A (fr) * | 1978-08-02 | 1982-01-05 | Erhart K. Drechsel | Obtention de phosphate monocalcique et d'acide phosphorique |
US4265862A (en) * | 1979-01-25 | 1981-05-05 | Eastman Kodak Company | Process for purifying rare-earth compositions using fractional sulfate precipitation |
US4374096A (en) * | 1979-08-01 | 1983-02-15 | Canadian Patents & Development Limited | Uranium ore processing |
US4328193A (en) * | 1980-02-27 | 1982-05-04 | Olin Corporation | Process for removing radium from monocalcium phosphate solutions by centrifugation |
US4282192A (en) * | 1980-02-27 | 1981-08-04 | Olin Corporation | Process for producing a calcium sulfate product containing low amounts of radium |
DE3021839A1 (de) * | 1980-06-11 | 1981-12-24 | Chemische Werke Hüls AG, 4370 Marl | Verfahren zur verminderung der radioaktivitaet von aus phosphoriten hergestelltem calciumsulfat |
CA1145487A (fr) * | 1980-08-22 | 1983-04-26 | Donald R. Weir | Extraction du radium en presence dans des solutions aqueuses de sulfate |
NL8006946A (nl) * | 1980-12-20 | 1982-07-16 | Stamicarbon | Werkwijze voor het winnen van praktisch radiumvrij calciumsulfaat, yttrium en lanthaniden, alsmede calciumsulfaat, yttrium en lanthaniden verkregen volgens deze werkwijze. |
US4388292A (en) * | 1981-12-14 | 1983-06-14 | United States Gypsum Company | Process for reducing radioactive contamination in phosphogypsum |
US4421731A (en) * | 1982-09-29 | 1983-12-20 | United States Gypsum Company | Process for purifying phosphogypsum |
NL8601846A (nl) * | 1986-07-15 | 1988-02-01 | Stamicarbon | Werkwijze voor het verwijderen van zware metalen uit zure fosfaathoudende waterige media. |
US5550313A (en) * | 1994-10-20 | 1996-08-27 | Institute Of Gas Technology | Treatment of norm-containing materials for minimization and disposal |
US6342284B1 (en) * | 1997-08-21 | 2002-01-29 | United States Gysum Company | Gypsum-containing product having increased resistance to permanent deformation and method and composition for producing it |
US6632550B1 (en) | 1997-08-21 | 2003-10-14 | United States Gypsum Company | Gypsum-containing product having increased resistance to permanent deformation and method and composition for producing it |
ID21641A (id) | 1997-08-21 | 1999-07-08 | United States Gypsum Co | Produk yang mengandung gypsum dengan peningkatan ketahanan terhadap deformasi tetap dan metode serta komposisi untuk memproduksinya |
MXPA03002981A (es) * | 2000-10-05 | 2004-12-06 | Pcs Nitrogen Fertilizer L P | Proceso de descontaminacion del yeso. |
BE1015840A3 (fr) * | 2003-12-24 | 2005-10-04 | Ecophos | Procede d'attaque de minerai de phosphate. |
US9896615B2 (en) | 2016-04-29 | 2018-02-20 | Fqe Chemicals Inc. | Composition for removing naturally occurring radioactive material (NORM) scale |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1154231A (en) * | 1914-12-30 | 1915-09-21 | Radium Therapy Corp | Process of concentrating radium ores and residues. |
US1522040A (en) * | 1922-01-07 | 1925-01-06 | William A J Bell | Art of extracting radium and other values from carnotite ores and the like |
US1487205A (en) * | 1922-01-07 | 1924-03-18 | Fed Phosphorus Co | Process for the removal of fluorine compounds from phosphoric acid |
US1554056A (en) * | 1925-04-24 | 1925-09-15 | George O Williams | Method for recovering and purifying radium compounds |
US1676556A (en) * | 1925-12-04 | 1928-07-10 | Grasselli Chemical Co | Process for the preparation of sodium phosphate |
US2531977A (en) * | 1948-01-22 | 1950-11-28 | Allied Chem & Dye Corp | Process for manufacture of phosphoric acid |
US2894804A (en) * | 1949-03-02 | 1959-07-14 | Carl W Sawyer | Process of extracting uranium and radium from ores |
NL97909C (fr) * | 1954-02-01 | |||
US2889217A (en) * | 1954-04-12 | 1959-06-02 | Int Minerals & Chem Corp | Process for producing defluorinated phosphate material |
US2883266A (en) * | 1956-06-29 | 1959-04-21 | Swift & Co | Production of sodium silico fluoride and fluorine-free phosphoric acid |
GB1081895A (en) * | 1965-11-09 | 1967-09-06 | Occidental Res & Eng | Improvements relating to the production of phosphoric acids |
US3619136A (en) * | 1968-11-12 | 1971-11-09 | Atlantic Richfield Co | Process for producing phosphoric acid |
-
1972
- 1972-04-15 DE DE2218382A patent/DE2218382C3/de not_active Expired
-
1973
- 1973-03-14 BE BE128765A patent/BE796739A/fr unknown
- 1973-04-11 FR FR7313105A patent/FR2180760B1/fr not_active Expired
- 1973-04-12 US US05/350,476 patent/US3949047A/en not_active Expired - Lifetime
- 1973-04-13 GB GB1794873A patent/GB1378133A/en not_active Expired
- 1973-04-16 JP JP48043039A patent/JPS4920093A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
US3949047A (en) | 1976-04-06 |
FR2180760A1 (fr) | 1973-11-30 |
DE2218382A1 (de) | 1973-10-25 |
FR2180760B1 (fr) | 1976-06-11 |
JPS4920093A (fr) | 1974-02-22 |
DE2218382C3 (de) | 1975-08-21 |
DE2218382B2 (de) | 1975-01-16 |
GB1378133A (en) | 1974-12-18 |
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