JPS54151592A - Gypsum wisker and its manufacture - Google Patents
Gypsum wisker and its manufactureInfo
- Publication number
- JPS54151592A JPS54151592A JP6000578A JP6000578A JPS54151592A JP S54151592 A JPS54151592 A JP S54151592A JP 6000578 A JP6000578 A JP 6000578A JP 6000578 A JP6000578 A JP 6000578A JP S54151592 A JPS54151592 A JP S54151592A
- Authority
- JP
- Japan
- Prior art keywords
- wisker
- gypsum
- caso4
- solution
- crystallized
- 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
Abstract
PURPOSE:To manufacture gypsum wisker which is small in fiber diameter, great in aspect ratio, and excellent in breaking resistance with good efficiency by mixing CaSO4 and a solvent to lower the solubility of CaSO4 under a condition that alpha- type hemihydrate gypsum is crystallized. CONSTITUTION:When mixing with a bad solvent, a CaSO4 solution is preheated so that the temperature becomes more than the temperature at which alpha-type hemihydrate gypsum is crystallized and also regulated so that the solution becomes saturated solution at the crystallization temperature. Then, the CaSO4 solution is mixed with a bad solvent, e.g., methanol, ethanol, ethylene glycol, diethylene glycol, formic acid, acetic acid, DMF, etc., whereupon alpha-type hemihydrate gypsum wisker is crystallized abruptly to form a slurry. The slurry is subjected to solid-liquid separtion, and then the wisker is washed with methanol, etc., and dried at 60 to 80 deg.C., followed by a stabilization treatment, e.g., baking, etc., as needed, to manufacture a gypsum wisker of an average fiber diameter of less than 0.1 microns and an aspect ratio of more than 50.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6000578A JPS54151592A (en) | 1978-05-22 | 1978-05-22 | Gypsum wisker and its manufacture |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6000578A JPS54151592A (en) | 1978-05-22 | 1978-05-22 | Gypsum wisker and its manufacture |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54151592A true JPS54151592A (en) | 1979-11-28 |
JPS6245170B2 JPS6245170B2 (en) | 1987-09-25 |
Family
ID=13129532
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6000578A Granted JPS54151592A (en) | 1978-05-22 | 1978-05-22 | Gypsum wisker and its manufacture |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54151592A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013023585A1 (en) * | 2011-08-15 | 2013-02-21 | Wu Shandong | Continuous process for large-scale production of calcium sulfate whisker |
CN103014869A (en) * | 2012-12-28 | 2013-04-03 | 清华大学 | Controllable preparation method of ultrathin anhydrous calcium sulfate crystal whisker with high length-diameter ratio |
CN103288118A (en) * | 2013-05-24 | 2013-09-11 | 东莞上海大学纳米技术研究院 | Method for dissociating industrial by-product gypsum and crystallizing to grow calcium sulphate crystal whiskers |
CN104651944A (en) * | 2015-02-12 | 2015-05-27 | 湘潭大学 | Preparation method of calcium-sulfate-based calcium sulfate crystal whisker |
CN104947179A (en) * | 2015-06-18 | 2015-09-30 | 张灵芝 | Method for preparing calcium sulfate whiskers |
CN108265335A (en) * | 2018-01-19 | 2018-07-10 | 北京工业大学 | A kind of semi-hydrated gypsum whisker and preparation method thereof |
CN110965124A (en) * | 2019-12-20 | 2020-04-07 | 南京工业大学 | Method for preparing high-quality calcium sulfate whiskers and calcium oxide by using industrial byproduct gypsum |
CN111101191A (en) * | 2020-02-27 | 2020-05-05 | 武汉工程大学 | Method for preparing gypsum whisker by seed crystal method |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102618931B (en) * | 2012-04-06 | 2015-04-22 | 江苏省范群干燥设备厂有限公司 | Method for preparing calcium sulfate whiskers |
-
1978
- 1978-05-22 JP JP6000578A patent/JPS54151592A/en active Granted
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013023585A1 (en) * | 2011-08-15 | 2013-02-21 | Wu Shandong | Continuous process for large-scale production of calcium sulfate whisker |
CN103014869A (en) * | 2012-12-28 | 2013-04-03 | 清华大学 | Controllable preparation method of ultrathin anhydrous calcium sulfate crystal whisker with high length-diameter ratio |
CN103288118A (en) * | 2013-05-24 | 2013-09-11 | 东莞上海大学纳米技术研究院 | Method for dissociating industrial by-product gypsum and crystallizing to grow calcium sulphate crystal whiskers |
CN104651944A (en) * | 2015-02-12 | 2015-05-27 | 湘潭大学 | Preparation method of calcium-sulfate-based calcium sulfate crystal whisker |
CN104947179A (en) * | 2015-06-18 | 2015-09-30 | 张灵芝 | Method for preparing calcium sulfate whiskers |
CN108265335A (en) * | 2018-01-19 | 2018-07-10 | 北京工业大学 | A kind of semi-hydrated gypsum whisker and preparation method thereof |
CN110965124A (en) * | 2019-12-20 | 2020-04-07 | 南京工业大学 | Method for preparing high-quality calcium sulfate whiskers and calcium oxide by using industrial byproduct gypsum |
CN111101191A (en) * | 2020-02-27 | 2020-05-05 | 武汉工程大学 | Method for preparing gypsum whisker by seed crystal method |
Also Published As
Publication number | Publication date |
---|---|
JPS6245170B2 (en) | 1987-09-25 |
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