| 摘要 |
THE PRESENT INVENTION PROVIDES A CATALYST FOR THE OXIDATIVE DEHYDROGENATION OF A LOWER HYDROCARBON TO FORM AT LEAST ONE HIGHER HYDROCARBON AND/OR LOWER OLEFIN. IN ONE EMBODIMENT, THE CATALYST INCLUDES A NONSTOICHIOMETRIC RARE EARTH OXYCARBONATE OF THE FORMULA MX CY OZ HAVING A DISORDERED AND/OR DEFECT STRUCTURE, WHEREIN M IS AT LEAST ONE RARE EARTH ELEMENT SELECTED FROM THE GROUP CONSISTING OF LA, PR, ND SM,EU,GD,TB,DY,HO,ER,AND TM; X=2; Z=3+AY; A IS LESS THAN ABOUT 1.8, AND Y IS THE NUMBER OF CARBON ATOMS IN THE OXYCARBONATE. WHEN USED FOR THE OXIDATIVE DEHYDROGENATION OF ALOWER HYDROCARBON AT APRESSURE ABOVE ABOUT 100 PSING, THE CATALYST HAS A SELECTIVITY OF TA LEAST ABOUT 40 PERCENT TO AT LEAST ONE HIGHER HYDROCARBON AND/OR LOWER OLEFIN. METHODS FOR PREPARING CATALYSTS TAUGHT BY THE INVENTION AND PROCESSES FOR USING THA CATALYSTS FOR THE OXIDATIVE DEHYDROGENATION OF LOWER HYDROCARBONS ARE ALSO PROVIDED. |
