POLYMERIZATION OF (ALFA)-OLEFINS IN THE GAS PHASE

摘要

(ALPHA)-OLEFINS ARE POLYMERIZED IN THE GAS PHASE AT FROM 30 TO 150°C AND A PRESSURE OF FROM 5 TO 80 BAR USING A CATALYST OR A CATALYST MIXTURE CONTAINING AS ANTISTATIC AGENT FROM 0.1 TO 5 BY WEIGHT OF ZNO AND/OR ANHYDROUS MG0, BASED ON THE TOTAL AMOUNT OF THE CATALYST MIXTURE, EXCEPT FOR A PROCESS IN WHICH THE CATALYST MIXTURE COMPRISES A CHROMIUM CATALYST AND MGO-SUPPORTED ZIEGLER CATALYST WHICH IS MODIFIED WITH AN ALKENE AND WITH ALKYLALUMINUM HYDRIDE AND ALSO COMPRISES FREE MGO AND THE TOTAL AMOUNT OF THE MGO IS NOT LESS THAN 2 BY WEIGHT OF THE CATALYST MIXTURE.