WIPO logo
Mobile | Deutsch | Español | Français | 日本語 | 한국어 | Português | Русский | 中文 | العربية |
PATENTSCOPE

Search International and National Patent Collections
World Intellectual Property Organization
Search
 
Browse
 
Translate
 
Options
 
News
 
Login
 
Help
 
Machine translation
1. (WO2002026362) HIGH RECOVERY REVERSE OSMOSIS PROCESS AND APPARATUS
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2002/026362    International Application No.:    PCT/US2001/030407
Publication Date: 04.04.2002 International Filing Date: 28.09.2001
Chapter 2 Demand Filed:    05.04.2002    
IPC:
B01D 61/04 (2006.01), B01D 61/58 (2006.01), B01D 65/02 (2006.01), B01D 65/06 (2006.01), C02F 1/44 (2006.01)
Applicants: IONICS, INCORPORATED [US/US]; 65 Grove Street Watertown, MA 02172-2882 (US) (For All Designated States Except US).
COSTA, Lawrence, C. [US/US]; (US) (For US Only).
MCCABE, Patrick, J. [US/US]; (US) (For US Only)
Inventors: COSTA, Lawrence, C.; (US).
MCCABE, Patrick, J.; (US)
Agent: SILVERSTEIN, David; Andover-IP-Law 44 Park Street, Suite 300 Andover, MA 01810 (US)
Priority Data:
60/236,942 29.09.2000 US
Title (EN) HIGH RECOVERY REVERSE OSMOSIS PROCESS AND APPARATUS
(FR) PROCEDE ET APPAREIL D'OSMOSE INVERSE A RECUPERATION ELEVEE
Abstract: front page image
(EN)Processes and apparatus are disclosed for producing clear reverse osmosis retentates having silica concentrations which are substantially supersaturated in silica from feedwaters having silica concentrations, without substantial formation of alkali-soluble scale having substantial silica content in the associated reverse osmosis apparatus, by adjusting the pH of such feedwaters to an acidic pH range prior to reverse osmosis in accordance with this invention. Also disclosed are related processes and apparatus for periodically removing minor amounts of alkali-soluble scale having substantial silica content from the apparatus.
(FR)L'invention concerne des procédés et un appareil destinés à produire des rétentats d'osmose inverse transparents possédant des concentrations de silice qui sont sensiblement supersaturées en silice par des eaux d'alimentation contenant des concentrations de silice, sans formation substantielle de tartre soluble dans un alcali possédant une teneur en silice substantielle dans l'appareil d'osmose inverse associé, par ajustage du pH des eaux d'alimentation à la gamme d'un pH acide avant l'osmose inverse. Cette invention concerne également des procédés et un appareil d'élimination périodique de quantités minimes de tartre soluble dans un alcali possédant une teneur en silice substantielle provenant de l'appareil.
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EE, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, TZ, UA, UG, US, UZ, VN, YU, ZA, ZW.
African Regional Intellectual Property Organization (GH, GM, KE, LS, MW, MZ, SD, SL, SZ, TZ, UG, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: English (EN)