Diorganohydroxy borane preparation used as cocatalyst in olefin polymerization comprises hydrolyzing an organohaloborane in a hydrocarbon

摘要

Diorganohydroxy borane preparation comprises hydrolyzing an organohaloborane in a hydrocarbon. Preparation of a diorganohydroxy borane of formula (I) comprises: (a) reacting a compound of formula (II) with a compound of formula (III) at normal pressure to give a compound of formula (IV); (b) extracting (IV) with aprotic, aliphatic and/or aromatic hydrocarbons and optionally separating from remaining solids; (c) reacting (IV) with a nucleophile of formula (V) in an organic medium; and (d) separating off the organic medium and optionally further purifying (I). (C6R15)1+lM(XR9p)2-l (I) (C6R15)1+nMR23-n (II) BR3R4R5 (III) (C6R15)1+mMR8(3-m) (IV) H-XR9p (V) R1, R2 and R7 = H, halogen or 1-20C group; M = group III element; X = group V or VI element; R9 = H or 1-20C group; p = 1 or 2; l and m = 0 or 1; M1 = group IV element; n = 0-3; R3-R5 = H, halogen, 1-20C group, OR62 or one or more are NR72; R6 = 1-20C group; R8 = H or halogen; and m - 0 or 1.