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1. (WO2012094286) PHOSPHORIC ACID PRODUCTION GYPSUM FILTRATION FLOCCULANT PRE-DILUTION (MAKE DOWN) WITH POST-FILTRATION PHOSPHORIC ACID
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2012/094286    International Application No.:    PCT/US2012/020033
Publication Date: 12.07.2012 International Filing Date: 03.01.2012
IPC:
C07F 9/08 (2006.01), B01D 21/01 (2006.01), C07B 61/00 (2006.01)
Applicants: NALCO COMPANY [US/US]; 1601 W. Diehl Road Naperville, Illinois 60563-1198 (US) (For All Designated States Except US).
DAVIS, Ronald V. [US/US]; (US) (For US Only).
MOSS, Wayne L. [US/US]; (US) (For US Only).
STROMINGER, Michael G. [US/US]; (US) (For US Only).
RENZELLO, Randon [US/US]; (US) (For US Only).
FAIGL, Thomas A. [US/US]; (US) (For US Only).
HAY, Daniel N. T. [US/US]; (US) (For US Only)
Inventors: DAVIS, Ronald V.; (US).
MOSS, Wayne L.; (US).
STROMINGER, Michael G.; (US).
RENZELLO, Randon; (US).
FAIGL, Thomas A.; (US).
HAY, Daniel N. T.; (US)
Agent: BISHOP, Joshua D.; 1601 W. Diehl Road Napperville, Illinois 60563 (US)
Priority Data:
12/984,331 04.01.2011 US
Title (EN) PHOSPHORIC ACID PRODUCTION GYPSUM FILTRATION FLOCCULANT PRE-DILUTION (MAKE DOWN) WITH POST-FILTRATION PHOSPHORIC ACID
(FR) PRÉ-DILUTION D'UN FLOCULANT DE FILTRATION DE GYPSE POUR LA PRODUCTION D'ACIDE PHOSPHORIQUE AVEC POST-FILTRATION DE L'ACIDE PHOSPHORIQUE
Abstract: front page image
(EN)A method for minimizing the addition of water to a phosphoric acid production process is described. The method uses phosphoric acid to make down a flocculant that is added to the process in order to promote filtration or clarification of crude phosphoric acid. Preferably, the phosphoric acid is a crude, clarified phosphoric acid that is recycled from the phosphoric acid production process itself.
(FR)Cette invention concerne un procédé permettant de diminuer l'ajout d'eau à un procédé de production d'acide phosphorique. Le procédé utilise l'acide phosphorique pour diluer un floculant qui est ajouté au procédé pour favoriser la filtration ou la clarification de l'acide phosphorique brut. De préférence, l'acide phosphorique est un acide phosphorique brut, clarifié qui est recyclé depuis le procédé de production d'acide phosphorique lui-même.
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW.
African Regional Intellectual Property Organization (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, 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)