Int. Cl.: B01J 21/18, 23/24, 23/652, 23/85, 23/882, 37/02, 37/20, C10G 45/04, 45/08, B01J 23/28, 23/883, 35/10 ^(2006.01)

 [56] المراجع:

  -EP 1 577 007 A (COSMO OIL CO LTD [JP]) 21 September 2005
-US 2 880 171 A (FLINN RICHARD A ET AL) 31 March 1959
-US 5 538 930 A (SUDHAKAR CHAKKA [US] ET AL) 23 July 1996
-US 2 967 204 A (HAROLD BEUTHER ET AL) 3 January 1961
-US 4 082 695 A (ROSINSKI EDWARD J ET AL) 4 April 1978
-US 3 830 752 A (MICKELSON G) 20 August 1974
EP 0 341 893 A (UNION OIL CO [US]) 15 November 1989
-US 5 466 363 A (AUDEH COSTANDI A [US] ET AL) 14 November 1995
-US 4 762 814 A (PARROTT STEPHEN L [US] ET AL) 9 August 1988

 الفاحص: م. ابراهيم محمد القرشي