BE836714A - METHOD AND APPARATUS FOR THE PREPARATION OF CALCIUM SULPHATE ALPHA-HEMIHYDRATE - Google Patents

METHOD AND APPARATUS FOR THE PREPARATION OF CALCIUM SULPHATE ALPHA-HEMIHYDRATE

Info

Publication number: BE836714A
Authority: BE; Belgium
Prior art keywords: hemihydrate; preparation; calcium sulphate; sulphate alpha; alpha
Prior art date: 1974-12-18

Application number

BE162803A

Other languages

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.)

1974-12-18

Filing date

1975-12-17

Publication date

1976-06-17

1974-12-18 Priority claimed from DE19742459739 external-priority patent/DE2459739C3/en

1975-12-17 Application filed filed Critical

1976-06-17 Publication of BE836714A publication Critical patent/BE836714A/en

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
- C01F11/466—Conversion of one form of calcium sulfate to another
- 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
- C04B11/028—Devices therefor characterised by the type of calcining devices used therefor or by the type of hemihydrate obtained
- C04B11/032—Devices therefor characterised by the type of calcining devices used therefor or by the type of hemihydrate obtained for the wet process, e.g. dehydrating in solution or under saturated vapour conditions, i.e. to obtain alpha-hemihydrate

Landscapes

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

BE162803A 1974-12-18 1975-12-17 METHOD AND APPARATUS FOR THE PREPARATION OF CALCIUM SULPHATE ALPHA-HEMIHYDRATE BE836714A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
DE19742459739 DE2459739C3 (en)		1974-12-18	Process and plant for the production of calcium sulfate alpha hemihydrate

Publications (1)

Publication Number	Publication Date
BE836714A true BE836714A (en)	1976-06-17

Family

ID=5933662

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
BE162803A BE836714A (en)	1974-12-18	1975-12-17	METHOD AND APPARATUS FOR THE PREPARATION OF CALCIUM SULPHATE ALPHA-HEMIHYDRATE

Country Status (14)

Country	Link
AT (1)	AT340445B (en)
BE (1)	BE836714A (en)
BR (1)	BR7508349A (en)
CH (1)	CH618146A5 (en)
DK (1)	DK142026C (en)
FR (1)	FR2294985A1 (en)
GB (1)	GB1474839A (en)
IE (1)	IE42222B1 (en)
LU (1)	LU74027A1 (en)
NL (1)	NL172142C (en)
PL (1)	PL109429B1 (en)
RO (1)	RO67270A (en)
SE (1)	SE405844B (en)
SU (1)	SU805943A3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP0085382A1 (en) *	1982-02-01	1983-08-10	Quante, Heinrich	Installation for the production of alpha-calcium sulfate
CN111517355A (en) *	2020-05-05	2020-08-11	桂林理工大学	Method for preparing alpha hemihydrate gypsum from phosphogypsum under autoclaved condition

1975
- 1975-12-03 GB GB4965175A patent/GB1474839A/en not_active Expired
- 1975-12-12 CH CH1615975A patent/CH618146A5/en not_active IP Right Cessation
- 1975-12-12 RO RO7584191A patent/RO67270A/en unknown
- 1975-12-15 SU SU752199179A patent/SU805943A3/en active
- 1975-12-16 NL NLAANVRAGE7514656,A patent/NL172142C/en not_active IP Right Cessation
- 1975-12-16 LU LU74027A patent/LU74027A1/xx unknown
- 1975-12-17 PL PL1975185660A patent/PL109429B1/en unknown
- 1975-12-17 BR BR7508349*A patent/BR7508349A/en unknown
- 1975-12-17 AT AT958575A patent/AT340445B/en not_active IP Right Cessation
- 1975-12-17 IE IE2746/75A patent/IE42222B1/en unknown
- 1975-12-17 DK DK574175A patent/DK142026C/en active
- 1975-12-17 BE BE162803A patent/BE836714A/en not_active IP Right Cessation
- 1975-12-17 SE SE7514272A patent/SE405844B/en unknown
- 1975-12-18 FR FR7538905A patent/FR2294985A1/en active Granted

Also Published As

Publication number	Publication date
PL109429B1 (en)	1980-05-31
NL7514656A (en)	1976-06-22
SE7514272L (en)	1976-06-21
RO67270A (en)	1980-03-15
ATA958575A (en)	1977-04-15
AT340445B (en)	1977-12-12
NL172142B (en)	1983-02-16
CH618146A5 (en)	1980-07-15
LU74027A1 (en)	1976-12-31
DK574175A (en)	1976-06-19
NL172142C (en)	1983-07-18
BR7508349A (en)	1976-09-08
FR2294985A1 (en)	1976-07-16
DK142026B (en)	1980-08-11
SU805943A3 (en)	1981-02-15
FR2294985B1 (en)	1981-08-07
DE2459739A1 (en)	1976-07-01
IE42222B1 (en)	1980-07-02
DK142026C (en)	1981-01-05
IE42222L (en)	1976-06-18
GB1474839A (en)	1977-05-25
SE405844B (en)	1979-01-08
DE2459739B2 (en)	1976-11-18

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JPS5317501A (en)	1978-02-17	Dryyspraying method for 0*5 hydrate of calcium sulfate

Legal Events

Date

Code

Title

Description

1987-06-30

RE

Patent lapsed

Owner name: HOECHST A.G.

Effective date: 19861231