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EP 3 962 644 A2

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(88) Date of publication A3: 10.12.2020 (43) Date of publication: 09.03.2022 Bulletin 2022/10 (21) Application number: 20799297.5 (22) Date of filing: 27.04.2020

(51) International Patent Classification (IPC):  B01J 29/06(2006.01) B01J 29/85(2006.01) B01J 37/04(2006.01) B01J 37/08(2006.01) B01D 53/56(2006.01) B01J 29/80(2006.01) B01J 37/30(2006.01) B01J 37/06(2006.01) B01J 37/10(2006.01) (52) Cooperative Patent Classification (CPC): B01J 29/723; B01J 29/7215; C01B 39/026 (86) International application number: PCT/IB2020/053927 (87) International publication number: WO 2020/222105 (05.11.2020 Gazette 2020/45)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 27.04.2019 IN 201921016803 (71) Applicant: Sud Chemie India Pvt. Ltd. 391340 Gujrat (IN)

(72) Inventors: LALLJEE, Arshia Altaf New Delhi 110017 (IN) SHETTI, Vasudev Nagesh Vadodara Gujrat 391340 (IN) BASRUR, Arun Gurudath Vadodara Gujrat 391340 (IN) PATEL, Rajeshkumar Manubhai Vadodara Gujrat 391340 (IN) NARKHEDE, Vijay Sopan Vadodara Gujrat 391340 (IN) SABDE, Dhananjay Prabhakar Vadodara Gujrat 391340 (IN) (74) Representative: Potter, Julian Mark  WP Thompson 138 Fetter Lane London EC4A 1BT London EC4A 1BT (GB)