JPS54151592A - Gypsum wisker and its manufacture - Google Patents

Gypsum wisker and its manufacture

Info

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
Application number
JP6000578A
Other languages
Japanese (ja)
Other versions
JPS6245170B2 (en
Inventor
Toshiyuki Taku
Chikao Shiho
Susumu Shiraki
Mitsuo Hashimoto
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.)
Idemitsu Kosan Co Ltd
Original Assignee
Idemitsu Kosan 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 Idemitsu Kosan Co Ltd filed Critical Idemitsu Kosan Co Ltd
Priority to JP6000578A priority Critical patent/JPS54151592A/en
Publication of JPS54151592A publication Critical patent/JPS54151592A/en
Publication of JPS6245170B2 publication Critical patent/JPS6245170B2/ja
Granted legal-status Critical Current

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.
JP6000578A 1978-05-22 1978-05-22 Gypsum wisker and its manufacture Granted JPS54151592A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Cited By (8)

* Cited by examiner, † Cited by third party
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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