abstract |
OLEFINS ARE CONVERTED INTO OTHER OLEFINS HAVING DIFFERENT NUMBERS OF CARBON ATOMS BY CONTACT WITH A CATALYST, ACTIVE FOR DISPROPORTIONATING PROPYLENE INTO ETHYLENE AND BUTENE, COMPRISING ALUMINA PROMOTED WITH A COMPOUND OF MOLYBDENUM, TUNGSTEN OR RHENIUM AND FURTHER TREATED WITH A MODIFYING AMOUNT OF A COMPOUND OF AN ALKALI METAL OR AN ALKALINE EARTH METAL. |