SG11201809478YA - Recovery of oxalic acid from industrial ferrous oxalate - Google Patents

Abstract

INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property MD HIM 0 11101 HOE 3E1 0 01110110 Ell 01110111111IM OEN Organization International Bureau (10) International Publication Number (43) International Publication Date .....0\"\" WO 2018/047184 Al 15 March 2018 (15.03.2018) WIP0 I PCT (51) International Patent Classification: AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, C07C 55/06 (2006.01) CO7C 51/02 (2006.01) CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, C07C 51/48 (2006.01) DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, (21) International Application Number: HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, PCT/IL2017/051021 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, (22) International Filing Date: OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, 11 September 2017 (11.09.2017) 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. (25) Filing Language: English (26) Publication Language: English (84) Designated States (unless otherwise indicated, for every kind of regional protection available): ARIPO (BW, GH, (30) Priority Data: GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, 62/393,153 12 September 2016 (12.09.2016) US UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, (71) Applicant: GREEN FUTURE ENVIRONMENT LTD. EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, [IL/IL]; 50 Hacarmel Street, 7630550 Rehovot (IL). MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, (72) Inventor: SCHAPIRO, Reuben David; 50 Carmel Street, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, 7630550 Rehovot (IL). KM, ML, MR, NE, SN, TD, TG). (72) Inventor: BOIKO, Vladimir (deceased). Declarations under Rule 4.17: (72) Inventor: SHAPIRO, Lev; 31A/6 Hashalom Street, 84473 — of inventorship (Rule 4.17(iv)) Beer Sheva (IL). Published: = A gen t : LUZZATTO & LUZZATTO et al.; P.O. Box — with international search report (Art. 21 ( 3 )) = (74) 5352, 8415202 Beer Sheva (IL). (81) Designated States (unless otherwise indicated, for every kind of national protection available): AE, AG, AL, AM, = (54) Title: RECOVERY OF OXALIC ACID FROM INDUSTRIAL FERROUS OXALATE = FLOW DIAGRAM OF OXALIC ACID RECOVERY (57) : The invention provides a process for recovering oxalic acid used FROM FERROUS OXALATE DIHYDRA7E in ferrous metal pickling procedures, thereby reducing the total cost and environ- = \" 0 0 H2so. mental load of the pickling treatments. = FeC20 1=2H/0 DECOMPOSITION Recycled = 0 = FeS0,1120 = FILTRATION Flier I = = 0 ' COOLING = Reactor 2 - , = N' hata FILTRATION - 11 0 0 Saturated oxalic WASHING 7r GC 13 1 11 IN 7r © DRYING \.. 112CAT.2H20 la 11 © Fig. 1 r'l C