Patent CA-3123530-A1 (CA)
Title: Production of high purity alumina and co-products from spent electrolyte of metal-air batteries
Inventor: WEAVER MARK
IPC: H01M6/52
Filed: 2020-04-05
Abstract: (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY  (PCT) (19) World Intellectual Property Organization International Bureau                             (10) International Publication Number (43) International Publication Date                WO 2020/212970 Al 22 October 2020 (22.10.2020)    WIPO I PCT (51) International Patent Classification:    (72) Inventor: WEAVER, Mark; 93 13 Willow Creek Drive, COJF 7/02 (2006.01)     HOEK 6/52 (2006.01)    Greenwell Springs, California 70739 (US). C22B 3/10 (2006.01)     HOEK 8/06 (2016.01) COJF 7/04 2006.01       HOEK 8/083 2016 0 (74) Agent: TAL, Ophir et al.; PEARL COHEN ZEDEK )                              . 1) (    ( LATZER BARATZ, P.O. Box 7198, 6 10712 1 Tel Aviv (21) International Application Number:    (114 (81) Designated States (unless otherwise indicated, for every (22) International Filing Date:    kind of national protection available): AE, AG, AL, AM, 05 April 2020 (05.04.2020)                   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, (25) Filing Language:                   English DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, (26) Publication Language:              English    HR, HU, 11), IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, =    KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, (30) Priority Data: MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, 62/834,417        16 April 2019 (16.04.2019)    US OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, (71) Applicant: PHINERGY LTD [IL/IL]; 2 Yodfat Street,    SC, SD, SE, SG, SK, SL, ST, SV, SY, TH, TJ, TM, TN, TR, P.0 Box 1290, 7 129 104 Lod (IL).            TT, TZ, UA, UG, US, UZ, VC, VN, WS, ZA, ZM, ZW. (54) Title: PRODUCTION OF HIGH PURITY ALUMINA AND CO-PRODUCTS FROM SPENT  ELECTROLYTE OF METAL-AIR  __  BATTERIES 100      Aluminum-air battery V90 Precipitated ATH from spent electrolyte 105        -7'212 Reactor(s) ____________________  ATH (with K/Na impurities) 1,110 210                                                      Pipework and containers __________________________________________ 'Strong acid H.- 130 125  _____________________ IFINa salt in solution 'L735 .220                                                        Ammonia and/ o Controller __________________________________________  Neutralization   .. chol tie base 230-r ________________________________________ ).1 Additional product Fertilizer and/or 1 Multiple      Precipitation                120    feed supplerneMi purification filtering, washi ; ng ,, _________________ I stages                       145 150 ATH with less K/Na contamination Figure 1              1High purity alumina (HPA) CZ (57) Abstract: Methods and systems are provided, which convert spent electrolyte from aluminum- air batteries into high purity alumina N (HP A) and useful co-products such as fertilizer(s) and/or feed supplement(s). Aluminum tri-hydroxide (ATH) having potassium (K) el and/or sodium (Na) impurities, e.g., from spent electrolyte, may be dissolved in strong acid to form an acidic ATH solution having 1-1 pH<4. Consecutively, the acidic ATH solution may be neutralized to pH>4 to precipitate ATH while retaining dissolved K/Na in the el neutralized solution. The dissolving and the neutralizing may then be repeated with the precipitated ATH until a specified purity level CAof the precipitated ATH is reached. Using appropriate bases to neutralize the acidic ATH solution, e.g., ammonia and/or choline, yields useful co-products such as ammonium nitrate (with nitric acid as the strong acid) and choline chloride (with hydrochloric acid as the el strong acid), respectively. [Continued on ner t page] Date Recue/Date Received 2021-06-16 (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). Published: ¨    with international search report (Art. 21(3)) Date Recue/Date Received 2021-06-16