FR2286795A1 - Procede pour preparer du sulfate de calcium hemihydrate de type a - Google Patents

Procede pour preparer du sulfate de calcium hemihydrate de type a

Info

Publication number: FR2286795A1
Authority: FR; France
Prior art keywords: sulphate; preparing type; calcium hemihydrate; hemihydrate; calcium
Prior art date: 1974-10-03
Legal status (The legal status 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 status listed.): Granted

Application number

FR7530419A

Other languages

English (en)

Other versions

FR2286795B1 (fr

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Taki Chemical Co Ltd

Original Assignee

Taki Chemical Co 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.)

1974-10-03

Filing date

1975-10-03

Publication date

1976-04-30

1975-10-03 Application filed by Taki Chemical Co Ltd filed Critical Taki Chemical Co Ltd

1976-04-30 Publication of FR2286795A1 publication Critical patent/FR2286795A1/fr

1978-04-07 Application granted granted Critical

1978-04-07 Publication of FR2286795B1 publication Critical patent/FR2286795B1/fr

Status Granted legal-status Critical Current

Links

OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 title 1
XZZZMRPZBYIFPN-UHFFFAOYSA-N O.OS(O)(=O)=O.OS(O)(=O)=O Chemical compound O.OS(O)(=O)=O.OS(O)(=O)=O XZZZMRPZBYIFPN-UHFFFAOYSA-N 0.000 title 1
229910052791 calcium Inorganic materials 0.000 title 1
239000011575 calcium Substances 0.000 title 1
238000004519 manufacturing process Methods 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

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)
Treating Waste Gases (AREA)
Paper (AREA)
Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

FR7530419A 1974-10-03 1975-10-03 Procede pour preparer du sulfate de calcium hemihydrate de type a Granted FR2286795A1 (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
JP49115006A JPS5140399A (en)	1974-10-03	1974-10-03	Aryusankarushiumuno shorihoho

Publications (2)

Publication Number	Publication Date
FR2286795A1 true FR2286795A1 (fr)	1976-04-30
FR2286795B1 FR2286795B1 (fr)	1978-04-07

Family

ID=14651944

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
FR7530419A Granted FR2286795A1 (fr)	1974-10-03	1975-10-03	Procede pour preparer du sulfate de calcium hemihydrate de type a

Country Status (5)

Country	Link
US (1)	US4069300A (fr)
JP (1)	JPS5140399A (fr)
DE (1)	DE2544017C3 (fr)
FR (1)	FR2286795A1 (fr)
GB (1)	GB1459379A (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE2708984C2 (de) *	1977-03-02	1984-12-06	Hölter, Heinz, Dipl.-Ing., 4390 Gladbeck	Verfahren zur Herstellung von Calciumsulfathalbhydrat
US4183908A (en) *	1977-06-24	1980-01-15	Southern California Edison Company	Crystalline calcium sulfate dihydrate and process for making same
DE3240317C2 (de) *	1982-10-30	1986-06-12	Gottfried Bischoff Bau kompl. Gasreinigungs- und Wasserrückkühlanlagen GmbH & Co KG, 4300 Essen	Verfahren zur Herstellung von Calciumsulfat-Dihydrat im Zuge der Entschwefelung von Rauchgasen aus Kraftwerkskesselfeuerungen
CA1258961A (fr) *	1984-09-17	1989-09-05	Yoshihiko Kudo	METHODE DE PREPARATION DE GYPSE SEMI-HYDRATE DE FORME .alpha.
CA2082957A1 (fr) *	1990-05-14	1991-11-15	Material-Concepts-Research Limited	Methode de preparation d'hydrogene et (ou) de sulfate de calcium avec une demi-molecule d'eau, a partir de sulfite de calcium
US5312609A (en) *	1992-12-31	1994-05-17	Dravo Lime Company	Method of sulfur dioxide removal from gaseous streams with α-hemihydrate gypsum product formation
US5562892A (en) *	1995-01-26	1996-10-08	Kirk; Donald W.	Process for the production of alpha hemihydrate calcium sulfate from flue gas sludge
CN100382873C (zh) *	2003-06-06	2008-04-23	浙江大学	常压盐溶液法制取α-半水脱硫石膏工艺
US20090208392A1 (en) *	2008-02-14	2009-08-20	Georgia-Pacific Gypsum, Llc	Process for producing alpha-hemihydrate gypsum

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2044942A (en) *		1936-06-23		Preparation of finely divided
USRE21631E (en)		1940-11-26		Process for removing and recover
US2086379A (en) *	1933-05-03	1937-07-06	Ici Ltd	Gas absorption process
DE1238374B (de) *	1965-04-24	1967-04-06	Giulini Ges Mit Beschraenkter	Verfahren zur Herstellung von alpha-Calciumsulfat-Halbhydrat
JPS5017318B1 (fr) *	1970-12-29	1975-06-19
JPS5223999B2 (fr) *	1972-03-18	1977-06-28

1974
- 1974-10-03 JP JP49115006A patent/JPS5140399A/ja active Granted
1975
- 1975-09-24 US US05/616,312 patent/US4069300A/en not_active Expired - Lifetime
- 1975-09-29 GB GB3981075A patent/GB1459379A/en not_active Expired
- 1975-10-02 DE DE2544017A patent/DE2544017C3/de not_active Expired
- 1975-10-03 FR FR7530419A patent/FR2286795A1/fr active Granted

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NEANT *

Also Published As

Publication number	Publication date
DE2544017A1 (de)	1976-04-15
JPS5215480B2 (fr)	1977-04-30
DE2544017C3 (de)	1980-09-18
JPS5140399A (en)	1976-04-05
US4069300A (en)	1978-01-17
FR2286795B1 (fr)	1978-04-07
DE2544017B2 (de)	1980-01-31
GB1459379A (en)	1976-12-22

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Legal Events

Date	Code	Title	Description
1987-08-21	ST	Notification of lapse