EP 0416089 A4 19910807 - PROCESS AND APPARATUS FOR PRODUCING CALCIUM SULFATE MICROFIBERS
Title (en)
PROCESS AND APPARATUS FOR PRODUCING CALCIUM SULFATE MICROFIBERS
Publication
Application
Priority
US 32485489 A 19890316
Abstract (en)
[origin: WO9011256A1] Process and apparatus for producing larger diameter, high aspect ratio, calcium sulfate microfibers are provided. The process involves passing a steam heated dilute aqueous slurry, containing about 1/2 %-15 % gypsum by weight, under pressure, first through a plug flow stage wherein slender, needle-like crystals are formed, and then through a stirred-flow stage wherein the crystals are grown both axially and radially. The implementing apparatus includes means for mixing the slurry with steam to rapidly raise the slurry temperature, and a plug-flow pipe reactor connected to a continuous stirred tank reactor.
IPC 1-7
IPC 8 full level
C30B 29/62 (2006.01); B01J 19/18 (2006.01); B01J 19/24 (2006.01); C01F 11/46 (2006.01); C04B 14/38 (2006.01); C30B 7/00 (2006.01)
CPC (source: EP)
B01J 19/18 (2013.01); B01J 19/243 (2013.01); C01F 11/466 (2013.01); C04B 14/38 (2013.01); C30B 7/00 (2013.01); C30B 29/10 (2013.01); C30B 29/62 (2013.01); B01J 2219/0002 (2013.01); B01J 2219/00768 (2013.01); B01J 2219/185 (2013.01); B01J 2219/1943 (2013.01); C01P 2004/10 (2013.01); C01P 2004/54 (2013.01); C01P 2004/61 (2013.01)
Citation (search report)
- [X] EP 0110128 A2 19840613 - BENCKISER GMBH JOH A [DE]
- [X] EP 0244722 A2 19871111 - BENCKISER GMBH JOH A [DE]
- GB 190403225 A 19040310 - OUVRARD CHARLES CALIXTE [FR]
- See references of WO 9011256A1
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB IT LI LU NL SE
DOCDB simple family (publication)
WO 9011256 A1 19901004; CA 2024146 A1 19900917; EP 0416089 A1 19910313; EP 0416089 A4 19910807; JP H03504596 A 19911009
DOCDB simple family (application)
US 9001406 W 19900314; CA 2024146 A 19900314; EP 90905820 A 19900314; JP 50548890 A 19900314