| abstract |
A 1,3-DIENE IS CAUSED TO CONTACT A CATALYST SYSTEM COMPRISING, IN COMBINATION: A TITANIUM COMPOUND TI(O-R-CL)NCL4-N (WHERE R IS AN ALKYLENE, CYCLOALKYLENE, CHLOROALKYLENE OR CHLOROCYLOALKYLENE GROUP OF C2 TO C15, AND N IS 1 OR 2); AN ORGANOALUMINUM COMPOUND AIR''MCL3-M (WHERE R'' IS AN ALKYL GROUP OF C1 TO C10, AND M IS 2 OR 1.5); AND AN ADDITIVE WHICH IS A SULFOXIDE SOR"2 (WHERE R" IS AN ALKYL OR ARALKYL GROUP OF C1 TO C10) OR A MIXTURE THEREOF AND A PHOSPHINE OXIDE POR''"3 (WHERE R" IS AN ALKYL, ARALKYL, OR ALKOXY GROUP OF C1 TO C10), THE 1,3-DIENE THERBY UNDERGOING CYCLIC TRIMERIZAYION WHEREBY A CYCLIC TRIMER OF LOW CONTENT OF HIGH POLYMERS IS PRODUCED AT HGIH REACTION VELOCITY AND WITH HIGH SELECTIVITY. |