BE763473A - PROCESS FOR DECREASING THE FLUORINE CONTENT OF WASTE CALCIUM SULPHATE DIHYDRATE PRECIPITATED DURING THE PRODUCTION OF PHOSPHORIC ACID - Google Patents

PROCESS FOR DECREASING THE FLUORINE CONTENT OF WASTE CALCIUM SULPHATE DIHYDRATE PRECIPITATED DURING THE PRODUCTION OF PHOSPHORIC ACID

Info

Publication number: BE763473A
Authority: BE; Belgium
Prior art keywords: decreasing; production; phosphoric acid; fluorine content; calcium sulphate
Prior art date: 1970-02-25

Application number

BE763473A

Other languages

French (fr)

Inventor

W Binder

K Bogati

H Stich

W Gauster

J Hutter

Original Assignee

Oesterr Stickstoffwerke Ag

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1970-02-25

Filing date

1971-02-25

Publication date

1971-08-25

1971-02-25 Application filed by Oesterr Stickstoffwerke Ag filed Critical Oesterr Stickstoffwerke Ag

1971-08-25 Publication of BE763473A publication Critical patent/BE763473A/en

Links

NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 title 2
PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 title 1
229910000147 aluminium phosphate Inorganic materials 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 title 1
230000003247 decreasing effect Effects 0.000 title 1
229910052731 fluorine Inorganic materials 0.000 title 1
239000011737 fluorine Substances 0.000 title 1
239000002699 waste material Substances 0.000 title 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
- 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
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B11/00—Calcium sulfate cements
- C04B11/02—Methods and apparatus for dehydrating gypsum
- C04B11/024—Ingredients added before, or during, the calcining process, e.g. calcination modifiers
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B11/00—Calcium sulfate cements
- C04B11/26—Calcium sulfate cements strating from chemical gypsum; starting from phosphogypsum or from waste, e.g. purification products of smoke

Landscapes

Chemical & Material Sciences (AREA)
Organic Chemistry (AREA)
Engineering & Computer Science (AREA)
Ceramic Engineering (AREA)
Materials Engineering (AREA)
Structural Engineering (AREA)
Inorganic Chemistry (AREA)
Life Sciences & Earth Sciences (AREA)
Geology (AREA)
Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

BE763473A 1970-02-25 1971-02-25 PROCESS FOR DECREASING THE FLUORINE CONTENT OF WASTE CALCIUM SULPHATE DIHYDRATE PRECIPITATED DURING THE PRODUCTION OF PHOSPHORIC ACID BE763473A (en)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
AT170170A AT297041B (en)	1970-02-25	1970-02-25	Process for reducing the fluorine content of phosphoric acid waste gypsum
DE19702009647 DE2009647A1 (en)	1970-02-25	1970-03-02

Publications (1)

Publication Number	Publication Date
BE763473A true BE763473A (en)	1971-08-25

Family

ID=25596588

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
BE763473A BE763473A (en)	1970-02-25	1971-02-25	PROCESS FOR DECREASING THE FLUORINE CONTENT OF WASTE CALCIUM SULPHATE DIHYDRATE PRECIPITATED DURING THE PRODUCTION OF PHOSPHORIC ACID

Country Status (7)

Country	Link
AT (1)	AT297041B (en)
BE (1)	BE763473A (en)
BR (1)	BR7101106D0 (en)
DE (1)	DE2009647A1 (en)
GB (1)	GB1346933A (en)
NL (1)	NL7018582A (en)
ZA (1)	ZA71309B (en)

1970
- 1970-02-25 AT AT170170A patent/AT297041B/en not_active IP Right Cessation
- 1970-03-02 DE DE19702009647 patent/DE2009647A1/de not_active Withdrawn
- 1970-12-21 NL NL7018582A patent/NL7018582A/xx unknown
1971
- 1971-01-18 ZA ZA710309A patent/ZA71309B/en unknown
- 1971-02-18 BR BR1106/71A patent/BR7101106D0/en unknown
- 1971-02-25 BE BE763473A patent/BE763473A/en unknown
- 1971-04-19 GB GB2123771A patent/GB1346933A/en not_active Expired

Also Published As

Publication number	Publication date
ZA71309B (en)	1972-08-30
BR7101106D0 (en)	1973-06-14
AT297041B (en)	1972-03-10
NL7018582A (en)	1971-08-27
DE2009647A1 (en)	1971-12-02
GB1346933A (en)	1974-02-13

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