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1. (WO2005065265) SELECTIVE FLUORIDE AND AMMONIA REMOVAL BY CHROMATOGRAPHIC SEPARATION OF WASTEWATER
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2005/065265 International Application No.: PCT/US2004/043259
Publication Date: 21.07.2005 International Filing Date: 22.12.2004
IPC:
C02F 1/42 (2006.01)
C CHEMISTRY; METALLURGY
02
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
F
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
1
Treatment of water, waste water, or sewage
42
by ion-exchange
Applicants:
THE BOC GROUP, INC. [US/US]; 575 Mountain Avenue Murray Hill, NJ 07974, US (AllExceptUS)
Inventors:
JANGBARWALA, Juzer; US
KRULIK, Gerald, Albert; US
Agent:
HEY, David, A.; The BOC Group, Inc. 575 Mountain Avenue Murray Hill, NJ 07974, US
Priority Data:
10/749,95431.12.2003US
Title (EN) SELECTIVE FLUORIDE AND AMMONIA REMOVAL BY CHROMATOGRAPHIC SEPARATION OF WASTEWATER
(FR) ELIMINATION SELECTIVE DE FLUORURE ET D'AMMONIAC PAR SEPARATION CHROMATOGRAPHIQUE DES EAUX USEES
Abstract:
(EN) A process of fluoride removal from wastewater streams produced during industrial operation for further industrial use or to comply with environmental regulations. The process segregates the removal of fluoride and fluorosilicate ions, from the totality of ions in the wastewater stream, thus improving treatment efficiency and reducing costs. Ion-exchange chromatography is used to remove the fluoride and fluorosilicate ions by passing the wastewater stream through one or more columns that contain a charge resin, which selectively binds cations/anions in the stream. The fluoride ions are washed from the column and then collected for removal or use in other processes.
(FR) L'invention concerne un procédé d'élimination du fluorure des flux d'eaux usées produites par des opérations industrielles à des fins de réutilisation industrielle future ou simplement par respect de la réglementation environnementale. Ce procédé consiste à séparer les ions de fluorure et de fluorosilicate éliminés de l'ensemble des ions contenus dans le flux d'eaux usées, de manière à améliorer l'efficacité du traitement et réduire les coûts. La chromatographie d'échange d'ions permet d'éliminer les ions de fluorure et de fluorosilicate. Les eaux usées traversent alors une ou plusieurs colonnes contenant une résine chargée, laquelle se lie sélectivement aux cations/anions du flux. Les ions de fluorure sont éliminés de la colonne par lavage, puis ils sont recueillis en vue d'opérations ultérieures.
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, 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, NA, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RU, SC, SD, SE, SG, SK, SL, SM, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, YU, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IS, IT, LT, LU, MC, NL, PL, PT, RO, SE, SI, SK, 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)
Also published as:
KR1020060114711IL176295EP1699540JP2007516835US20050145572CN1898000