摘要:
A process for the preparation of linear alpha olefins having 2n carbon atoms from linear alpha olefins having n carbon atoms comprising the steps of (a) dimerizing a linear alpha olefin having n carbon atoms in the presence of a dimerization catalyst to produce a linear internal olefin having 2n carbon atoms; (b)(i) reacting the linear internal olefin having 2n carbon atoms produced in step (a) with a trialkylaluminium compound in the presence of a catalytic amount of an isomerization/displacement catalyst in order to cause isomerization of the linear internal olefin and to displace alkyl group(s) from said trialkylaluminium compound to form an alkyl aluminium compound wherein at least one of the alkyl groups bound to aluminium is a linear alkyl which has been derived from the isomerization of said linear internal olefin; and (b)(ii) reacting said alkyl aluminium compound with an alpha olefin optionally in the presence of a displacement catalyst so as to displace said linear alkyl from said alkyl aluminium compound to form a linear alpha olefin having 2n carbon atoms.
摘要:
A process for the production of alpha-olefins comprising reacting ethylene under oligomerization conditions in the presence of a mixture comprising: (a) a metal salt based on Fe(II), Fe(III), Co(II) or Co(III); (b) a pyridine bis-imine ligand; and (c) a co-catalyst which is the reaction product of water with one or more organometallic aluminium compounds, wherein the one or more organometallic aluminium compounds is selected from: (i) βδ-branched compounds of formula (I): Al(CH2—CR1R2—CH2—CR4R5R6)xR3yHz; (ii) βγ-branched compounds of formula (II) Al(CH2—CR1R2—CR4R5R6)xR3yHz and mixtures thereof; wherein when the metal salt and the bis-arylimine pyridine ligand are mixed together they are soluble in aliphatic or aromatic hydrocarbon solvent.
摘要翻译:一种制备α-烯烃的方法,包括在低聚条件下,在混合物存在下使乙烯反应,所述混合物包含:(a)基于Fe(II),Fe(III),Co(II)或Co(III)的金属盐, ; (b)吡啶双亚胺配体; 和(c)作为水与一种或多种有机金属铝化合物的反应产物的助催化剂,其中所述一种或多种有机金属铝化合物选自:(i)式(I)的betadelta支化化合物:Al CH2-CR 1 R 2 -CH2-CR 4 R 5 R 6)xR 3Hz; (ⅱ)式(Ⅱ)bet ma ma ma branched branched branched)Hz Hz Hz Hz Hz Hz Hz Hz Hz Hz Hz Hz Hz Hz Hz Hz Hz Hz Hz;;;;;;;;;;;;;; 其中当将金属盐和双芳基亚胺吡啶配体混合在一起时,它们可溶于脂族或芳族烃溶剂。
摘要:
Mixed bis-imine pyridine ligands of formula (I), wherein Z1, which is different from Z2, is an optionally substituted aryl group; and Z2 comprises an optionally substituted heterohydrocarbyl moiety, or an optionally substituted aryl group in combination with a metal, said optionally substituted aryl group being π-co-ordinated to the metal; mixed bis-imine pyridine complexes comprising a ligand of formula (I); mixed ionic bis-imine pyridine complexes comprising a ligand of formula (I); and processes for the production of alpha olefins from ethylene, using said complexes.
摘要:
A catalyst precursor composition comprising a) a source of chromium, molybdenum or tungsten; b) a first ligand having the general formula (I); (R1)(R2)P—X—P(R3)(R4) (I) wherein X is a bivalent organic bridging group; R1 and R3 are independently selected from, hydrocarbyl, substituted hydrocarbyl, heterohydrocarbyl and substituted heterohydrocarbyl groups, with the proviso that when R1 and R3 are aromatic groups they do not contain a polar substituent at any of the ortho-positions; R2 and R4 are independently selected from optionally substituted aromatic groups, each R2 and R4 bearing a polar substituent on at least one of the ortho-positions; and c) a second ligand having the general formula (II); (R1′)(R2′)P—X′—P(R3′)(R4′) (II) wherein X′ is a bridging group of the formula —N(R5′)—, wherein R5′ 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 R1′, R2′, R3′ and R4′ are independently selected from hydrocarbyl, substituted hydrocarbyl, heterohydrocarbyl and substituted heterohydrocarbyl groups of which at least one of R1′, R2′, R3′ and R4′ is substituted with a polar substituent, or R1′, R2′, R3′ and R4′ are independently selected from hydrocarbyl, substituted hydrocarbyl, heterohydrocarbyl and substituted heterohydrocarbyl groups, wherein any substituents on one or more of R1′, R2′, R3′ and R4′ are non-polar. The present invention also relates to a catalyst system comprising the catalyst precursor composition of the present invention and a cocatalyst.
摘要:
Mixed bis-imine pyridine ligands of formula (I), wherein Z1, which is different from Z2, is an optionally substituted aryl group; and Z2 comprises an optionally substituted heterohydrocarbyl moiety, or an optionally substituted aryl group in combination with a metal, said optionally substituted aryl group being π-co-ordinated to the metal; mixed bis-imine pyridine complexes comprising a ligand of formula (I); mixed ionic bis-imine pyridine complexes comprising a ligand of formula (I); and processes for the production of alpha olefins from ethylene, using said complexes.
摘要:
Non-symmetrical ligands of formula (I); bis-aryliminepyridine MXn complexes comprising a non-symmetrical ligand of formula (I), wherein M is a metal selected from Fe or Co, n is 2 or 3, and X is halide, optionally substituted hydrocarbyl, alkoxide, amide, or hydride; [bis-aryliminepyridine MYp.Ln+][NC−]q complexes, comprising a non-symmetrical ligand of formula (I), wherein Y is a ligand which may insert an olefin, M is Fe or Co, NC− is a non-coordinating anion and p+q is 2 or 3, matching the formal oxidation of the metal atom M, L is a neutral Lewis donor molecule and n=0, 1, or 2; and processes for the production of alpha-olefins from ethylene, using said complexes.
摘要:
A catalyst precursor composition comprising a) a source of chromium, molybdenum or tungsten; b) a first ligand having the general formula (I): (R1)(R2)P—X—P(R3)(R4) (I) where X is a bivalent organic bridging group, R1 and R3 are hydrocarbyl groups, and R2 and R4 are aromatic groups; and c) a second ligand having the general formula (II): (R1′)(R2′)P—X′—P(R3′)(R4′) (II) where X′ is a bridging group containing nitrogen and R1′, R2″, R3′ and R4′ are hydrocarbyl groups. The present invention also relates to a catalyst system comprising the catalyst precursor composition of the present invention and a cocatalyst.
摘要:
A process for the simultaneous trimerization and tetramerization of olefinic monomers, wherein the process comprises contacting at least one olefinic monomer with a catalyst system comprising: a) a source of chromium, molybdenum or tungsten; b) a ligand having the general formula (I); (R1)2P-X-P(R1)m(R2)n (I) wherein: X is a bridging group of the formula —N(R3)—; the R1 groups are independently selected from an optionally substituted aromatic group bearing a polar substituent on at least one of the ortho-positions; and the R2 groups are independently selected from hydrocarbyl, substituted hydrocarbyl, heterohydrocarbyl and substituted heterohydrocarbyl groups with the proviso that when the group is aromatic it does not contain a polar substituent at any of the ortho-positions; and c) a cocatalyst.
摘要:
Mixed bis-imine pyridine ligands of formula (I), wherein Z1, which is different from Z2, is an optionally substituted aryl group; and Z2 comprises an optionally substituted heterohydrocarbyl moiety, or an optionally substituted aryl group in combination with a metal, said optionally substituted aryl group being π-co-ordinated to the metal; mixed bis-imine pyridine complexes comprising a ligand of formula (I); mixed ionic bis-imine pyridine complexes comprising a ligand of formula (I); and processes for the production of alpha olefins from ethylene, using said complexes.
摘要:
A process for production of higher linear alpha olefins and/or alkyl-branched alpha olefins, which comprises the co-oligomerisation of one or more alpha olefins with ethylene in the presence of a metal catalyst system employing one or more bis-aryliminepyridine MXa complexes and/or one or more [bis-aryliminepyridine MYp.Lb+][NC−]q complexes; and said process is carried out at an ethylene pressure of less than 2.5 MPa.