JPS5499098A - Production of satin spar gypsum or spherical gypsum formed from said gypsum - Google Patents
Production of satin spar gypsum or spherical gypsum formed from said gypsumInfo
- Publication number
- JPS5499098A JPS5499098A JP15945577A JP15945577A JPS5499098A JP S5499098 A JPS5499098 A JP S5499098A JP 15945577 A JP15945577 A JP 15945577A JP 15945577 A JP15945577 A JP 15945577A JP S5499098 A JPS5499098 A JP S5499098A
- Authority
- JP
- Japan
- Prior art keywords
- gypsum
- hemihydrate
- spherical
- spar
- production
- 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
Landscapes
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Inorganic Fibers (AREA)
Abstract
PURPOSE: To produce satin spar gypsum and spherical gypsum in a short time by adding hemihydrate gypsum or sol. anhydrous gypsum to a hydrothermal reaction system of an aq. slurry of raw gypsum at above a temp. at which hemihydrate gypsum terminates hydration.
CONSTITUTION: Water, an acidic aq. slon. or an org. solvent-contg. aq. slon. is added to gypsum and/or hemihydrate gypsum, and hydrothermal reaction is carried out with stirring and heating at 100W170, esp. 110W140°C. During this process, hemihydrate gypsum or sol. anhydrous gypsum is added to the reaction system in an amt. of 0.2W50, pref. 1W20 wt% to the amt. of the raw gypsum at above a temp. at which hemihydrate gypsum terminates hydration. The reaction product is optionally subjected to solid-liquid separation and then dried at about 60°C to obtain α-type hemihydrate satin spar gypsum, spherical gypsum formed from said gypsuym, or their intermediate aggregate. The resulting gypsum is small in diameter and very long.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15945577A JPS5499098A (en) | 1977-12-29 | 1977-12-29 | Production of satin spar gypsum or spherical gypsum formed from said gypsum |
GB8015586A GB2053874B (en) | 1977-12-29 | 1978-12-15 | Production of calcium sulphate |
GB7848753A GB2011363B (en) | 1977-12-29 | 1978-12-15 | Production of calcium sulphate |
CA318,237A CA1115025A (en) | 1977-12-29 | 1978-12-19 | Process for producing calcium sulfate |
DE2854722A DE2854722C2 (en) | 1977-12-29 | 1978-12-19 | Process for the production of fibrous and / or spherical α-calcium sulfate hemihydrate |
FR7836549A FR2413339B1 (en) | 1977-12-29 | 1978-12-27 | PROCESS FOR THE PREPARATION OF CALCIUM SULFATE |
IT52460/78A IT1158192B (en) | 1977-12-29 | 1978-12-27 | PROCEDURE FOR PRODUCING CALCIUM SULPHATE |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15945577A JPS5499098A (en) | 1977-12-29 | 1977-12-29 | Production of satin spar gypsum or spherical gypsum formed from said gypsum |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5499098A true JPS5499098A (en) | 1979-08-04 |
JPS6227007B2 JPS6227007B2 (en) | 1987-06-11 |
Family
ID=15694128
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15945577A Granted JPS5499098A (en) | 1977-12-29 | 1977-12-29 | Production of satin spar gypsum or spherical gypsum formed from said gypsum |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5499098A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013533195A (en) * | 2010-09-15 | 2013-08-22 | ベイジン ニュー ビルディング マテリアルズ パブリック リミティド カンパニー | Gypsum whisker, reinforced mineral wool sound absorbing plate including the gypsum whisker, and method for manufacturing the same |
-
1977
- 1977-12-29 JP JP15945577A patent/JPS5499098A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013533195A (en) * | 2010-09-15 | 2013-08-22 | ベイジン ニュー ビルディング マテリアルズ パブリック リミティド カンパニー | Gypsum whisker, reinforced mineral wool sound absorbing plate including the gypsum whisker, and method for manufacturing the same |
Also Published As
Publication number | Publication date |
---|---|
JPS6227007B2 (en) | 1987-06-11 |
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