Selective dimerisation of conjugated diene - using catalyst system comprising Gp=VIII metal cpd. and in situ formed hydrogen donor
Номер патента: FR2437390A1
Опубликовано: 25-04-1980
Автор(ы): Igor Tkatchenko, Jean Rene Bernard, Jean Thivolle-Cazat
Принадлежит: Elf Union
Опубликовано: 25-04-1980
Автор(ы): Igor Tkatchenko, Jean Rene Bernard, Jean Thivolle-Cazat
Принадлежит: Elf Union
Реферат: Selective dimension of conjugated dienes is effected by introducing into an autoclave cooled at 0 degrees C and under an inert gas, (A) a catalyst system opt. contg. a solvent and comprising (1) a Gp. VIII metal cpd., (2) a 2-electron donating ligand and (3) and H-donating cpd. formed in situ by reacting an amine with an aldehyde, and (B) an amt. of diene such that the wt. ratio diene/metal cpd. is 250-450, and after closing the autoclave, heating for 1-20 hrs. with stirring at 20-120 (40-80) degrees C while keeping the reaction mixt. liquid, then cooling, condensing the non-converted diene and distilling the obtd. diene. Used for the dimenisation of butadiene, isoprene, dimethylbutadiene and piperylenes into octadienes. Process obviates the use of the expensive Pd or Pt as catalyst.
Liq. co polymers of conjugated dienes - prepd using catalyst contng. org. nickel cpd. and alkyl aluminium halide or an organometallic cpd. halo cpd. mixture
Номер патента: FR2212348A1. Автор: . Владелец: Sumitomo Chemical Co Ltd. Дата публикации: 1974-07-26.