FR2286795A1 - Procede pour preparer du sulfate de calcium hemihydrate de type a - Google Patents
Procede pour preparer du sulfate de calcium hemihydrate de type aInfo
- Publication number
- FR2286795A1 FR2286795A1 FR7530419A FR7530419A FR2286795A1 FR 2286795 A1 FR2286795 A1 FR 2286795A1 FR 7530419 A FR7530419 A FR 7530419A FR 7530419 A FR7530419 A FR 7530419A FR 2286795 A1 FR2286795 A1 FR 2286795A1
- Authority
- FR
- France
- Prior art keywords
- sulphate
- preparing type
- calcium hemihydrate
- hemihydrate
- calcium
- Prior art date
- 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
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
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)
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USRE21631E (en) | 1940-11-26 | Process for removing and recover | ||
US2044942A (en) * | 1936-06-23 | Preparation of finely divided | ||
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)
Title |
---|
NEANT * |
Also Published As
Publication number | Publication date |
---|---|
JPS5215480B2 (fr) | 1977-04-30 |
FR2286795B1 (fr) | 1978-04-07 |
US4069300A (en) | 1978-01-17 |
GB1459379A (en) | 1976-12-22 |
JPS5140399A (en) | 1976-04-05 |
DE2544017C3 (de) | 1980-09-18 |
DE2544017A1 (de) | 1976-04-15 |
DE2544017B2 (de) | 1980-01-31 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |