ZA735661B - Improvements in the calcination of gypsum - Google Patents

Improvements in the calcination of gypsum

Info

Publication number: ZA735661B
Authority: ZA; South Africa
Prior art keywords: calcination; gypsum
Prior art date: 1972-09-01

Application number

ZA735661A

Other languages

English (en)

Inventor

F Flood

C Court

N Mcloughlin

K Jones

Original Assignee

Bpb Industries Ltd

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.)

1972-09-01

Filing date

1973-08-20

Publication date

1974-07-31

1973-08-20 Application filed by Bpb Industries Ltd filed Critical Bpb Industries Ltd

1974-07-31 Publication of ZA735661B publication Critical patent/ZA735661B/xx

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
- C04B11/024—Ingredients added before, or during, the calcining process, e.g. calcination modifiers

Landscapes

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

ZA735661A 1972-09-01 1973-08-20 Improvements in the calcination of gypsum ZA735661B (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
GB4074872A GB1438632A (en)	1972-09-01	1972-09-01	Calcination of gypsum

Publications (1)

Publication Number	Publication Date
ZA735661B true ZA735661B (en)	1974-07-31

Family

ID=10416421

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
ZA735661A ZA735661B (en)	1972-09-01	1973-08-20	Improvements in the calcination of gypsum

Country Status (20)

Country	Link
US (1)	US3898316A (xx)
JP (1)	JPS4993410A (xx)
AT (1)	AT339806B (xx)
AU (1)	AU477312B2 (xx)
BE (1)	BE804162A (xx)
CA (1)	CA999118A (xx)
CH (1)	CH575352A5 (xx)
DE (1)	DE2343851A1 (xx)
DK (1)	DK148630C (xx)
ES (1)	ES418262A1 (xx)
FR (1)	FR2197817B1 (xx)
GB (1)	GB1438632A (xx)
IE (1)	IE38093B1 (xx)
IN (1)	IN140347B (xx)
IT (1)	IT995242B (xx)
LU (1)	LU68331A1 (xx)
NL (1)	NL7312078A (xx)
NO (1)	NO136146C (xx)
SE (1)	SE382627B (xx)
ZA (1)	ZA735661B (xx)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4744961A (en) *	1985-04-25	1988-05-17	United States Gypsum Company	Submerged combustion calcination
EP0294415B1 (de) *	1986-12-18	1990-10-03	GEBHARD, Georg, Dr.	Verfahren zur in-situ-gewinnung von calciumsulfathalbhydrat und/oder calciumsulfat (anhydrit) aus dem wäscher einer nassen rauchgasentschwefelungsanlage
DE3709393A1 (de) *	1987-03-21	1988-09-29	Saarbergwerke Ag	Verfahren zur umwandlung von calciumsulfatdihydrat in (alpha)-halbhydrat
MY150755A (en)	2006-12-20	2014-02-28	Nugyp Corp	Calcium sulfate hemihydrate treatment process
GB0708382D0 (en) *	2007-05-01	2007-06-06	Bpb Plc	Gypsum based compositions
US20150376063A1 (en) *	2014-06-27	2015-12-31	Boral Ip Holdings (Australia) Pty Limited	Ultra-Lightweight Gypsum Wallboard
CN113811405B (zh)	2019-03-29	2024-02-27	鼓德温公开有限公司	熔模粉末

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US1370581A (en) *	1920-03-08	1921-03-08	United States Gypsum Co	Process of aging calcined gypsum products and product thereof
US1960538A (en) *	1932-03-25	1934-05-29	Certain Teed Prod Corp	Process of producing cementitious material

1972
- 1972-09-01 GB GB4074872A patent/GB1438632A/en not_active Expired
1973
- 1973-08-16 CA CA178,929A patent/CA999118A/en not_active Expired
- 1973-08-16 IE IE1414/73A patent/IE38093B1/xx unknown
- 1973-08-20 ZA ZA735661A patent/ZA735661B/xx unknown
- 1973-08-24 AU AU59598/73A patent/AU477312B2/en not_active Expired
- 1973-08-27 ES ES418262A patent/ES418262A1/es not_active Expired
- 1973-08-28 US US392389A patent/US3898316A/en not_active Expired - Lifetime
- 1973-08-28 DK DK472673A patent/DK148630C/da not_active IP Right Cessation
- 1973-08-29 CH CH1238373A patent/CH575352A5/xx not_active IP Right Cessation
- 1973-08-29 BE BE135061A patent/BE804162A/xx not_active IP Right Cessation
- 1973-08-30 FR FR7331474A patent/FR2197817B1/fr not_active Expired
- 1973-08-30 SE SE7311825A patent/SE382627B/xx unknown
- 1973-08-30 DE DE19732343851 patent/DE2343851A1/de active Pending
- 1973-08-30 LU LU68331A patent/LU68331A1/xx unknown
- 1973-08-30 NO NO3416/73A patent/NO136146C/no unknown
- 1973-08-30 IT IT28403/73A patent/IT995242B/it active
- 1973-08-30 IN IN1995/CAL/73A patent/IN140347B/en unknown
- 1973-08-31 JP JP48098169A patent/JPS4993410A/ja active Pending
- 1973-08-31 NL NL7312078A patent/NL7312078A/xx active Search and Examination
- 1973-09-03 AT AT764673A patent/AT339806B/de not_active IP Right Cessation

Also Published As

Publication number	Publication date
NL7312078A (xx)	1974-03-05
NO136146C (no)	1977-07-27
SE382627B (sv)	1976-02-09
ES418262A1 (es)	1976-03-01
GB1438632A (en)	1976-06-09
CA999118A (en)	1976-11-02
FR2197817A1 (xx)	1974-03-29
IT995242B (it)	1975-11-10
US3898316A (en)	1975-08-05
IE38093L (en)	1974-03-01
FR2197817B1 (xx)	1980-01-11
CH575352A5 (xx)	1976-05-14
AT339806B (de)	1977-11-10
IN140347B (xx)	1976-10-23
DK148630B (da)	1985-08-19
JPS4993410A (xx)	1974-09-05
AU5959873A (en)	1975-02-27
BE804162A (fr)	1973-12-17
IE38093B1 (en)	1977-12-21
ATA764673A (de)	1977-02-15
DK148630C (da)	1986-01-20
AU477312B2 (en)	1976-10-21
LU68331A1 (xx)	1973-11-12
DE2343851A1 (de)	1974-03-21
NO136146B (no)	1977-04-18

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