BG39465A3 - Method for purification of chemical gypsum - Google Patents
Method for purification of chemical gypsumInfo
- Publication number
- BG39465A3 BG39465A3 BG046178A BG4617880A BG39465A3 BG 39465 A3 BG39465 A3 BG 39465A3 BG 046178 A BG046178 A BG 046178A BG 4617880 A BG4617880 A BG 4617880A BG 39465 A3 BG39465 A3 BG 39465A3
- Authority
- BG
- Bulgaria
- Prior art keywords
- purification
- phosphogypsum
- chemical gypsum
- treatment
- ozone
- Prior art date
Links
- 238000000034 method Methods 0.000 title abstract 2
- 229910052602 gypsum Inorganic materials 0.000 title 1
- 239000010440 gypsum Substances 0.000 title 1
- 238000000746 purification Methods 0.000 title 1
- 239000000126 substance Substances 0.000 title 1
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 abstract 3
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 abstract 2
- 239000000725 suspension Substances 0.000 abstract 1
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
- C01F11/468—Purification of calcium sulfates
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Paper (AREA)
- Removal Of Specific Substances (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7900772A FR2446256A1 (fr) | 1979-01-12 | 1979-01-12 | Procede de purification du gypse chimique |
Publications (1)
Publication Number | Publication Date |
---|---|
BG39465A3 true BG39465A3 (en) | 1986-06-16 |
Family
ID=9220693
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BG046178A BG39465A3 (en) | 1979-01-12 | 1980-01-07 | Method for purification of chemical gypsum |
Country Status (19)
Country | Link |
---|---|
US (1) | US4344925A (lt) |
AT (1) | AT368987B (lt) |
BE (1) | BE880952A (lt) |
BG (1) | BG39465A3 (lt) |
BR (1) | BR8000193A (lt) |
CA (1) | CA1139079A (lt) |
DE (1) | DE2952571A1 (lt) |
ES (1) | ES487650A1 (lt) |
FI (1) | FI66332C (lt) |
FR (1) | FR2446256A1 (lt) |
GB (1) | GB2039269B (lt) |
IN (1) | IN153514B (lt) |
IT (1) | IT1145402B (lt) |
MA (1) | MA18684A1 (lt) |
NL (1) | NL8000116A (lt) |
PL (1) | PL119292B1 (lt) |
PT (1) | PT70680A (lt) |
SE (2) | SE434046B (lt) |
ZA (1) | ZA796744B (lt) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4533528A (en) * | 1983-07-15 | 1985-08-06 | United States Gypsum Company | Process for continuously calcining gypsum to low dispersed consistency stucco |
DE4242200C1 (de) * | 1992-12-15 | 1993-10-28 | Steag Ag | Verfahren zur Verbesserung des Weißgrades von Rohgips |
US6007620A (en) * | 1997-01-29 | 1999-12-28 | Folks; Timothy S. | Process to make interground, white, blended cement |
US6033468A (en) * | 1997-01-29 | 2000-03-07 | Folks; Timothy S. | Interground white blended cement |
CN102634843B (zh) * | 2012-04-27 | 2015-04-22 | 昆明理工大学 | 一种磷石膏制取微米级硫酸钙颗粒和晶须的方法 |
CN103496729B (zh) * | 2013-09-04 | 2015-09-30 | 贵州锦麟化工有限责任公司 | 提高磷酸生产过程中副产磷石膏质量的方法 |
CN103466577B (zh) * | 2013-09-04 | 2016-01-20 | 贵州锦麟化工有限责任公司 | 提高湿法磷酸品质的方法 |
CN115477485B (zh) * | 2022-09-06 | 2023-08-22 | 常州大学 | 一种利用偶氮染料硫酸废水制备α-半水石膏的方法 |
CN115504499A (zh) * | 2022-10-21 | 2022-12-23 | 广州市勃发环境科技有限公司 | 一种含硫酸及硫酸盐的化工废水精制石膏的方法 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA802105A (en) * | 1968-12-24 | Hayakawa Masashi | Process for preparing gypsum hemihydrate | |
US1548358A (en) * | 1924-05-26 | 1925-08-04 | Rumford Chemical Works | Plaster of paris and method of making the same |
GB339797A (lt) * | 1928-12-18 | 1930-12-18 | Rene Perdu | |
US2197003A (en) * | 1937-11-18 | 1940-04-16 | Glidden Co | Process for making pigments |
DE1467470C2 (de) * | 1963-10-28 | 1974-06-12 | Pluess-Staufer Ag, Oftringen, Aargau (Schweiz) | Verbesserung des Weiß grades von Kreide, Calcit oder Dolomit |
US3616900A (en) * | 1969-07-09 | 1971-11-02 | Engelhard Min & Chem | Method for bleaching gray kaolin clay |
US4113835A (en) * | 1972-07-06 | 1978-09-12 | Veba-Chemie Aktiengesellschaft | Process for preparing pure synthetic calcium sulfate semihydrate |
FR2201682A5 (lt) * | 1972-10-02 | 1974-04-26 | Cerphos | |
GB1394910A (en) * | 1972-10-23 | 1975-05-21 | Pluss Stauffer Ag | Process for the optical brightening of minerals |
SE417104B (sv) * | 1978-10-30 | 1981-02-23 | Supra Ab | Sett att rena respektive bleka fororenat kalciumsulfat avsedd att anvendas som pigment och/eller fyllmedel |
-
1979
- 1979-01-12 FR FR7900772A patent/FR2446256A1/fr active Granted
- 1979-12-12 GB GB7942864A patent/GB2039269B/en not_active Expired
- 1979-12-12 ZA ZA00796744A patent/ZA796744B/xx unknown
- 1979-12-12 SE SE7910257A patent/SE434046B/sv not_active IP Right Cessation
- 1979-12-12 SE SE7910257D patent/SE7910257L/xx not_active Application Discontinuation
- 1979-12-21 IN IN935/DEL/79A patent/IN153514B/en unknown
- 1979-12-26 MA MA18886A patent/MA18684A1/fr unknown
- 1979-12-28 DE DE19792952571 patent/DE2952571A1/de not_active Withdrawn
- 1979-12-28 BE BE0/198816A patent/BE880952A/fr not_active IP Right Cessation
- 1979-12-31 AT AT0821379A patent/AT368987B/de not_active IP Right Cessation
-
1980
- 1980-01-07 FI FI800041A patent/FI66332C/fi not_active IP Right Cessation
- 1980-01-07 BG BG046178A patent/BG39465A3/xx unknown
- 1980-01-08 NL NL8000116A patent/NL8000116A/nl not_active Application Discontinuation
- 1980-01-10 PT PT70680A patent/PT70680A/pt unknown
- 1980-01-10 PL PL1980221311A patent/PL119292B1/pl unknown
- 1980-01-11 IT IT47568/80A patent/IT1145402B/it active
- 1980-01-11 ES ES487650A patent/ES487650A1/es not_active Expired
- 1980-01-11 CA CA000343649A patent/CA1139079A/en not_active Expired
- 1980-01-11 BR BR8000193A patent/BR8000193A/pt unknown
-
1981
- 1981-01-15 US US06/225,232 patent/US4344925A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
PL119292B1 (en) | 1981-12-31 |
GB2039269B (en) | 1982-10-20 |
PL221311A1 (lt) | 1980-10-06 |
CA1139079A (en) | 1983-01-11 |
FI800041A (fi) | 1980-07-13 |
ATA821379A (de) | 1982-04-15 |
AT368987B (de) | 1982-11-25 |
SE434046B (sv) | 1984-07-02 |
PT70680A (fr) | 1980-02-01 |
FI66332C (fi) | 1984-10-10 |
NL8000116A (nl) | 1980-07-15 |
ES487650A1 (es) | 1980-06-16 |
IT1145402B (it) | 1986-11-05 |
BE880952A (fr) | 1980-04-16 |
BR8000193A (pt) | 1980-05-27 |
IT8047568A0 (it) | 1980-01-11 |
SE7910257L (sv) | 1980-07-13 |
FR2446256A1 (fr) | 1980-08-08 |
DE2952571A1 (de) | 1980-07-24 |
ZA796744B (en) | 1980-11-26 |
FI66332B (fi) | 1984-06-29 |
FR2446256B1 (lt) | 1983-05-27 |
MA18684A1 (fr) | 1980-07-01 |
GB2039269A (en) | 1980-08-06 |
US4344925A (en) | 1982-08-17 |
IN153514B (lt) | 1984-07-21 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
IT1122122B (it) | Mezzo ausiliario di filtraggio per trattare sospensioni,specialmente fanghi di comunita'industriali e altri fanghi per la successiva eliminazione dell'acqua | |
ES2039943T3 (es) | Procedimiento y aparato para la purificacion de agua empleando polipirrolidona. | |
DE3863254D1 (de) | Anlage zur aeroben biologischen reinigung von schadstoffhaltigem wasser. | |
DE3650647D1 (de) | Arzneimittel zur Behandlung von Anxietas | |
ATA231679A (de) | Reaktor zur kontinuierlichen thermischen behandlung von verunreinigten kohlenstoffhaltigen adsorptionsmitteln | |
FR2306939A1 (fr) | Procede de purification et d'augmentation de la blancheur de minerais naturels de calcite | |
BG39465A3 (en) | Method for purification of chemical gypsum | |
FR2432485B1 (fr) | Procede de denitrification des eaux par voie biologique | |
FR2433812B1 (fr) | Procede de purification d'eaux residuaires contaminees, contenant des agents tensio-actifs et detergents | |
FR2563208B1 (fr) | Procede de traitement des eaux par l'ozone | |
FR2547574B1 (fr) | Procede et installation d'epuration biologique aerobie des eaux residuaires en utilisant des micro-organismes libres et des micro-organismes fixes | |
DE3888525D1 (de) | Verwendung eines verfahrens zur behandlung des prozesswassers von aquakulturanlagen durch nitrifikation und sauerstoffanreicherung. | |
FR2619559B1 (fr) | Procede pour la regulation des installations d'epuration des eaux residuaires | |
BE891432A (fr) | Procede d'elimination du mercure des eaux residuaires industrielles | |
FR2527585B1 (fr) | Procede de traitement d'eaux usees industrielles par des boues activees | |
SU668884A1 (ru) | Способ очистки нефтесодержащего шлама | |
FR2511359B1 (fr) | Procede de traitement d'eaux usees par l'ozone | |
FR2597088B1 (fr) | Procede d'epuration des eaux residuaires et de traitement des boues | |
BE883306A (fr) | Procede d'elimination au moyen d'ozone des impuretes des eaux souterraines et superficielles | |
FR2667860B1 (fr) | Procede d'epuration biologique des eaux residuaires incluant la denitrification. | |
OA05770A (fr) | Procédé pour l'épuration des eaux usées et station d'épuration le mettant en oeuvre. | |
FR2608587B3 (fr) | Procede d'epuration d'effluents industriels par le " lithotamnium calcareum " | |
NO790520L (no) | Anlegg for behandling av avloepsvann efter den biologiske aktivslammetode | |
AT372061B (de) | Anlage zur mechanischen und biologischen behandlung von abwasser | |
FR2612915B1 (fr) | Procede d'epuration biologique des eaux residuaires contenant de la diethanolamine |