Title:
PREFERENTIAL PRECIPITATION MEMBRANE SYSTEM AND METHOD
Document Type and Number:
WIPO Patent Application WO2004085040
Kind Code:
A8
Abstract:
A system and method for desalinating a feed solution containing a high level of sparingly soluble solutes, such as calcium sulfate, in which a high percentage of the water content of the feed solution is recovered as purified water. The method and system comprise introducing a sufficient quantity of nucleation crystals on the low pressure side of a first-pass membrane separation unit (33) so that the sparingly soluble solutes precipitate on the suspended nucleation crystals, instead of on the surface of the first-pass semi-permeable membrane barrier (5). The permeate (9) from the first-pass membrane separation unit (33) is then sent to the high pressure side of a second-pass membrane separation unit (34). The second-pass semi-permeable membrane barrier (11) rejects additional dissolved solutes, some of which can be recycled back to the first-pass membrane (5), so that permeate (14) with a low level of dissolved solutes is produced on the low pressure side of the second-pass membrane barrier.
More Like This:
| WO/2004/074811 | PROCESS FOR THE RECOVERY OF SULFURIC ACID USING POLYMERIC MEMBRANES |
| WO/2002/076588 | METHOD |
Inventors:
ENZWEILER RONALD J (US)
ALLAN PETER (US)
STRASSER JURGEN HEINZ (US)
ALLAN PETER (US)
STRASSER JURGEN HEINZ (US)
Application Number:
PCT/US2004/009055
Publication Date:
July 07, 2005
Filing Date:
March 24, 2004
Export Citation:
Assignee:
ITT MFG ENTERPRISES INC (US)
ENZWEILER RONALD J (US)
ALLAN PETER (US)
STRASSER JURGEN HEINZ (US)
ENZWEILER RONALD J (US)
ALLAN PETER (US)
STRASSER JURGEN HEINZ (US)
International Classes:
B01D61/02; B01D61/04; C02F1/44; (IPC1-7): B01D61/02; B01D61/58; B01D65/08
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