Catalytic trimerization and tetramerization of olefinic monomers

• Main Authors: DE BOER ERIC JOHANNES MARIA, VAN DER HEIJDEN HARRY, VAN ZON ARIE, SMIT JOHAN PAUL, ON QUOC AN
• Format: Patent
• Language: Chinese; English
• Published: 22.10.2008
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

A catalyst precursor composition comprising: a) a source of chromium, molybdenum or tungsten; b) a first ligand having the general formula (I); (R ) (R ) P-X-P(R ) (R ) (I), wherein: X is a bivalent organic bridging group; R and R are independently selected from, hydrocarbyl, substituted hydrocarbyl, heterohydrocarbyl and substituted heterohydrocarbyl groups, with the proviso that when R and R are aromatic groups they do not contain a polar substituent at any of the ortho-positions; R and R are independently selected from optionally substituted aromatic groups, each R and R bearing a polar substituent on at least one of the ortho-positions; and c) a second ligand having the general formula (II) ; (R<1'>) (R<2'>)P-X'-P(R<3'>) (R<4'>) (II), wherein: X' is a bridging group of the formula -N(R<5'>)-, wherein R<5'> is selected from hydrogen, a hydrocarbyl group, a substituted hydrocarbyl group, a heterohydrocarbyl group, a substituted heterohydrocarbyl group, a silyl group or derivative thereof; and R<1'>, R<2'>,