Pe. Matkovskii et al., OPTIMIZATION OF HEXENE-1 YIELD IN THE COURSE OF OLIGOMERIZATION OF ETHYLENE ON ZIRCONIUM-CONTAINING COMPLEX CATALYSTS, Vysokomolekularnye soedinenia. Seria A, 35(2), 1993, pp. 207-211
Analysis of the kinetic model of ethylene oligomerization on zirconium
-containing complex catalysts was carried out. The dependence of the m
olar fraction of individual higher alpha-olefins N(i) on the number of
units in a molecule i of the product is described by the exponential
function N(i) = ab(i). The dependence of the mass fraction of hexene-1
(trimer W3) in the products of ethylene oligomerization on the probab
ility of chain growth b = k(p)/(k(p) + k(n)M) was found to be extreme,
and (W3)max cannot exceed 27 mass %. The dependences W(i) on b for an
y i > 3 are similar. The mass fraction of butene-1 (i = 2) increases m
onotonously from 0 to 100 mass %, as b decreases from 1 to 0. This mea
ns that the selective dimerization of ethylene to butene-1 can be perf
ormed. At the same time hexene-1 and other alpha-olefins cannot be obt
ained selectively by the methods of catalytic trimerization and oligom
erization of ethylene, respectively. Experimental data are present whi
ch confirm the theoretical estimations.