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EP 2 019 730 A1

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(43) Date of publication: 04.02.2009 Bulletin 2009/06 (21) Application number: 06842729.3 (22) Date of filing: 29.08.2006

(51) International Patent Classification (IPC):  B01J 23/40(2006.01) B01D 53/44(2006.01) B01J 21/04(2006.01) (86) International application number: PCT/IN2006/000324 (87) International publication number: WO 2007/125539 (08.11.2007 Gazette 2007/45)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR Designated Extension States: AL BA HR MK RS (30) Priority: 02.05.2006 IN MU06842006 (71) Applicant: INDIAN PETROCHEMICALS CORPORATION LIMITED 391 346 Gujarat (IN)

(72) Inventors: GAJULA, Sreenivasa, Rao 391 346 Gujarat (IN) DONGARA, Rajeshwar 391 346 Gujarat (IN) PAVAGADA, Raghvendra, Char 391 346 Gujarat (IN) KONDA, Ramaswamy, Krishnamurthy 391 346 Gujarat (IN) HALGERI, Bhimarao, Anand 391 346 Gujarat (IN) SINGARAM, Mohan Mumbai 400 021 Maharashtra (IN) SINGH, Sudhir Mumbai 400 021 Maharashtra (IN) (74) Representative: Fairbairn, Angus Chisholm  Marks & Clerk 90 Long Acre London WC2E 9RA London WC2E 9RA (GB)