SG11201907502RA - Chlorination-assisted coagulation processes for water purification - Google Patents

Abstract

NO C (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 23 August 2018 (23.08.2018) WIPO I PCT 0111111010 0111 °nolo OH VIII VIII Immo oimIE (10) International Publication Number WO 2018/151975 Al (51) International Patent Classification: CO2F 1/463 (2006.01) CO2F 101/32 (2006.01) CO2F 1/461 (2006.01) CO2F 103/36 (2006.01) (21) International Application Number: PCT/US2018/017035 (22) International Filing Date: 06 February 2018 (06.02.2018) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 62/459,733 16 February 2017 (16.02.2017) US 15/791,731 24 October 2017 (24.10.2017) US (71) Applicant: SAUDI ARABIAN OIL COMPANY [SA/SA]; Post Office Box 5000, Dhahran, 31311 (SA). (71) Applicant (for AG only): ARAMCO SERVICES COM- PANY [US/US]; 9009 West Loop South, Houston, Texas 77096 (US). (72) Inventors: RAYNEL, Guillaume Robert Jean-Francois; c/o Saudi Arabian Oil Company, Post Office Box 5000, Dhahran, 31311 (SA). VILAGINES, Regis Didier Alain; c/o Saudi Arabian Oil Company, Post Office Box 5000, Dhahran, 31311 (SA). (74) Agent: WISECUP, Bryan C. et al.; Dinsmore & Shohl LLP, One South Main Street, Fifth Third Center, Suite 1300, Dayton, Ohio 45402 (US). (81) Designated States (unless otherwise indicated, for every kind of national protection available): AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, (54) Title: CHLORINATION-ASSISTED COAGULATION PROCESSES FOR WATER PURIFICATION (57) : Chlorination-assisted coagulation processes and systems are disclosed for removing organic and inorganic contaminants from aqueous compositions and streams such as produced water generated by petroleum production operations. The chlorination-as- sisted coagulation process includes converting at least a portion of chloride ions in the aqueous composition to hypochlorite ions or hypochlorous acid by passing an electric current through at least a portion of the aqueous composition under anaerobic conditions, the aqueous composition including the chloride ions, iron (II) compounds, and one or more organic compounds. The chlorination-as- sisted coagulation process further includes reacting at least a portion of the iron (II) compounds of the aqueous composition with the hypochlorite or hypochlorous acid to produce iron (III) ions, and coagulating the one or more organic compounds with the iron (III) ions to produce a plurality of insoluble solid particles in a treated aqueous composition. [Continued on next page] WO 2018/151975 Al MIDEDIMOMOIDEIREE31101101HOMOIMEN HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, 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. (84) Designated States (unless otherwise indicated, for every kind of regional protection available): ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (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), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG). Declarations under Rule 4.17: as to applicant's entitlement to apply for and be granted a patent (Rule 4.17(H)) as to the applicant's entitlement to claim the priority of the earlier application (Rule 4.17(iii)) Published: with international search report (Art. 21(3)) with amended claims (Art. 19(1))