Patent SG-11201804414V-A (SG)
Title: A process for reducing sodium fluoride content in trona or soda ash
Inventor: DAPURKAR SUDHIR
IPC: C01D7/10
Filed: 2016-12-02
Abstract: INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property -' Organization International Bureau (43) International Publication Date ..... ..sr.1 8 June 2017 (08.06.2017) W I P0 1 PCT ID Hit (10) 1111111111111111111 WO International F11111111 2017/093960 Publication 111111111111111111111RIIIIIIIIIIIIIII Number Al (51) International Patent Classification: 412108 (IN). KUMAR, Anil; Tata Chemicals Ltd Innov- , COM 7/10 (2006.01) ation Centre, Ghotavde Phata, Pirangut Indus. Area, Gate No. 1139/1, Pune 412108 (IN). (21) International Application Number: PCT/IB2016/057301 (74) Agent: OBHAN, Essenese; Obhan & Associates, N - 94, Second Floor, Panchshila Park, New Delhi 110017 (IN). (22) International Filing Date: 2 December 2016 (02.12.2016) (81) Designated States (unless otherwise indicated, for every kind of national protection available): AE, AG, AL, AM, (25) Filing Language: English AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, (26) Publication Language: English 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, (30) Priority Data: HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KN, KP, KR, 4594/MUM/2015 4 December 2015 (04.12.2015) IN KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, (71) Applicant: TATA CHEMICALS LIMITED [IN/IN]; MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, Bombay House, 24 Homi Modi Street, Mumbai 400001 OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, (N). 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, (72) Inventors: DAPURKAR, Sudhir; Tata Chemicals Ltd., ZW. Innovation Centre, Ghotavde Phata, Pirangut Indus. Area, Gate No. 1139/1, Pune 412108 (IN). PALLPATRI, (84) Designated States (unless otherwise indicated, for every Shrinivas; Tata Chemicals Ltd, Innovation Centre, Ghota- kind of regional protection available): ARIPO (BW, GH, vde Phata, Pirangut Indus. Area, Gate No. 1139/1, Pune GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, 412108 (IN). CHAUDHARI, Pankaj; Tata Chemicals Ltd., Innovation Centre, Ghotavde Phata, Pirangut Indus. TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, Area, Gate No. 1139/1, Pune 412108 (IN). BALU, Hem- 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, alekha; Tata Chemicals Ltd Innovation Centre, Ghotavde , SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, Phata, Pirangut Indus. Area, Gate No. 1139/1, Pune GW, KM, ML, MR, NE, SN, TD, TG). 412108 NAKHALE, Chandrakant; Tata Chemicals (IN). Ltd., Innovation Centre, Ghotavde Phata, Pirangut Indus. Published: Area, Gate No. 1139/1, Pune 412108 (IN). KUMAR, — with international search report (Art 21(3)) Rajiv; Tata Chemicals Ltd Innovation Centre, Ghotavde , Phata, Pirangut Indus. Area, Gate No. 1139/1, Pune 1-1 .4t C::: , Cr \ M Cr \ C::: , IN 1-1 (54) Title: A PROCESS FOR REDUCING SODIUM FLUORIDE CONTENT IN TRONA OR SODA ASH 0 N (57) : A process for reducing sodium fluoride content in trona or soda ash, comprising mixing the trona or the soda ash ega ) with saline water comprising sodium chloride in a range of 1 to 10% by weight to precipitate the sodium fluoride present in the trona or the soda ash; and separating the precipitated sodium fluoride from the mixture to obtain a trona or soda ash solution having re - 5- duced sodium fluoride content.