GB1459379A - Process for producing a-type calcium sulphate hemihydrate - Google Patents

Process for producing a-type calcium sulphate hemihydrate

Info

Publication number
GB1459379A
GB1459379A GB3981075A GB3981075A GB1459379A GB 1459379 A GB1459379 A GB 1459379A GB 3981075 A GB3981075 A GB 3981075A GB 3981075 A GB3981075 A GB 3981075A GB 1459379 A GB1459379 A GB 1459379A
Authority
GB
United Kingdom
Prior art keywords
caso
suspension
salt
weight
producing
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.)
Expired
Application number
GB3981075A
Other languages
English (en)
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.)
Filing date
Publication date
Application filed by Taki Chemical Co Ltd filed Critical Taki Chemical Co Ltd
Publication of GB1459379A publication Critical patent/GB1459379A/en
Expired legal-status Critical Current

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)
  • Paper (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Treating Waste Gases (AREA)
GB3981075A 1974-10-03 1975-09-29 Process for producing a-type calcium sulphate hemihydrate Expired GB1459379A (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
GB1459379A true GB1459379A (en) 1976-12-22

Family

ID=14651944

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3981075A Expired GB1459379A (en) 1974-10-03 1975-09-29 Process for producing a-type calcium sulphate hemihydrate

Country Status (5)

Country Link
US (1) US4069300A (US06229276-20010508-P00022.png)
JP (1) JPS5140399A (US06229276-20010508-P00022.png)
DE (1) DE2544017C3 (US06229276-20010508-P00022.png)
FR (1) FR2286795A1 (US06229276-20010508-P00022.png)
GB (1) GB1459379A (US06229276-20010508-P00022.png)

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 (en) * 1984-09-17 1989-09-05 Yoshihiko Kudo PROCESS FOR PRODUCING .alpha.-FORM GYPSUM HEMIHYDRATE
EP0527831A1 (en) * 1990-05-14 1993-02-24 Materials-Concepts-Research Limited Process to produce hydrogen and/or hemihydrate calcium sulphate from calcium sulphite
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
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 (US06229276-20010508-P00022.png) * 1970-12-29 1975-06-19
JPS5223999B2 (US06229276-20010508-P00022.png) * 1972-03-18 1977-06-28

Also Published As

Publication number Publication date
JPS5140399A (en) 1976-04-05
US4069300A (en) 1978-01-17
DE2544017B2 (de) 1980-01-31
JPS5215480B2 (US06229276-20010508-P00022.png) 1977-04-30
DE2544017C3 (de) 1980-09-18
DE2544017A1 (de) 1976-04-15
FR2286795A1 (fr) 1976-04-30
FR2286795B1 (US06229276-20010508-P00022.png) 1978-04-07

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee