Process for the oligomerization of ethylene

Details Process for the oligomerization of ethylene Process for the oligomerization of ethylene

C - Chemistry, Metallurgy

07

C

260/706.4

C07C 2/08 (2006.01) B01J 31/18 (2006.01) C07C 2/36 (2006.01) C07F 15/04 (2006.01) C08F 110/02 (2006.01)

Patent

CA 1161460

PROCESS FOR THE OLIGOMERIZATION OF ETHYLENE Abstract Of The Disclosure Ethylene is oligomerized by contacting ethylene under oligomerization conditions with a nickel ylide de- fined by the following Formula I: Image wherein R1, R2, R3, R4, R5, R6, R7 and R8 are either alike or different members selected from the group consisting of hydrogen, alkyl radicals having from about one to about 24 carbon atoms, preferably from about one to about 10 carbon atoms; aryl radicals having from about six to about 20 carbon atoms, preferably from about six to about 10 carbon atoms; alkenyl radicals having from about two to about 30 carbons atoms, preferably from about two to about 20 car- bon atoms; cycloalkyl radicals having from about three to about 40 carbon atoms, preferably from about three to about 30 carbon atoms; aralkyl and alkaryl radicals having from about six to about 40 carbon atoms, preferably from about six to about 30 carbon atoms; a halogen radical selected from the group consisting of fluorine, chlorine, bromine and iodine, preferably chlorine; a hydroxyl group; an alkoxy or aryloxy group; and a hydrocarbyl group, such as defined above, carrying halogen, hydroxyl or alkoxy or aryloxy; provided that at least one, preferably from about one to about four, of each of R1 to R8 is a sulfonato group (-SO3-) or an alkyl, aryl, alkenyl, cycloalkyl, aralkyl or alkaryl group carrying a sulfonato group; M is sulfur or oxygen, preferably oxygen; E is phosphorus, ar- senic, antimony or nitrogen, preferably phosphorus; and F is phosphorus, arsenic or antimony, preferably phosphorus. This process is characterized by a relatively high reac- tion rate at low temperatures and pressures and results in the production of relatively high proportions of desirable trimer, tetramer, pentamer, and higher olefinic products.

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