EP 2108061 A2 20091014 - CRYSTAL GROWTH IN A SOLUTION IN STATIONARY CONDITIONS
Title (en)
CRYSTAL GROWTH IN A SOLUTION IN STATIONARY CONDITIONS
Title (de)
ZIEHEN VON KRISTALLEN IN EINER LÖSUNG UNTER STATIONÄREN BEDINGUNGEN
Title (fr)
CROISSANCE CRISTALLINE EN SOLUTION DANS DES CONDITIONS STATIONNAIRES.
Publication
Application
Priority
- FR 2007001980 W 20071203
- FR 0655343 A 20061206
Abstract (en)
[origin: FR2909687A1] The process for preparing a potassium dihydrogen phosphate or deutrated potassium dihydrogen phosphate crystal (1), comprises producing a crystalline solution with a part of supersaturated solution of the compound, growing the crystal in a chamber maintained at 15-25[deg] C, making a continuous circulation of a solution to ultrasounds associated to heating or cooling of the solution between the crystallization and saturation chambers (10, 20) while maintaining a constant supersaturation (higher than 10%) in the crystallization chamber, and treating the solution. The process for preparing a potassium dihydrogen phosphate or deutrated potassium dihydrogen phosphate crystal (1), comprises producing a crystalline solution with a part of supersaturated solution of the compound, growing the crystal in a chamber maintained at 15-25[deg] C, making a continuous circulation of a solution to ultrasounds associated to heating or cooling of the solution between the crystallization and saturation chambers (10, 20) while maintaining a constant supersaturation (higher than 10%) in the crystallization chamber, and treating the solution to eliminate or inhibit the formation of aggregates. The crystallization chamber is in fluid communication with the saturation chamber having an excess of compound with a solid nourishing body and having a constant temperature. Solubility of the compound in the solution at saturation temperature is higher than solubility of the compound in the solution at crystallization temperature. The temperature difference between the saturation chamber and crystallization chamber is 2-30[deg] C. Independent claims are included for: (1) a deutrated potassium dihydrogen phosphate monocrystal; and (2) a device for preparing a deutrated potassium dihydrogen phosphate crystal.
IPC 8 full level
C30B 7/00 (2006.01); C30B 7/08 (2006.01); C30B 29/14 (2006.01); C30B 35/00 (2006.01)
CPC (source: EP US)
C30B 7/08 (2013.01 - EP US); C30B 29/14 (2013.01 - EP US); C30B 35/00 (2013.01 - EP US); Y10T 117/1024 (2015.01 - EP US)
Citation (search report)
See references of WO 2008081103A2
Citation (examination)
- US 2459869 A 19490125 - CHRISTENSEN CARL J, et al
- JP S623090 A 19870109 - KURODA HIROTO, et al
- LEIGH HAGENSON THOMPSON ET AL: "The rate enhancing e!ect of ultrasound by inducing supersaturation in a solid}liquid system", CHEMICAL ENGINEERING SCIENCE, 1 January 2000 (2000-01-01), pages 3085 - 3090, XP055609155, Retrieved from the Internet <URL:https://www.sciencedirect.com/science/article/pii/S0009250999004819/pdfft?md5=7c1ae4777f0ad112e7b327c8d516aead&pid=1-s2.0-S0009250999004819-main.pdf>
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
FR 2909687 A1 20080613; FR 2909687 B1 20090327; EP 2108061 A2 20091014; JP 2010511589 A 20100415; US 2011142741 A1 20110616; US 8771379 B2 20140708; WO 2008081103 A2 20080710; WO 2008081103 A3 20080912
DOCDB simple family (application)
FR 0655343 A 20061206; EP 07871782 A 20071203; FR 2007001980 W 20071203; JP 2009539776 A 20071203; US 51792807 A 20071203