Alpha-olefins polymerization catalyst
AssigneeFormosa Plastics Corporation, U.S.A.
InventorsGuangxue Xu, Honglan Lu
Life of this patent
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Abstract
Methods and apparatus to form a catalyst precursor, comprising combining in a reactor magnesium, an alkoxysilane compound, a halogenized silicon compound, a halogenized transition metal compound, a substituted aromatic furan compound having a structural formula, and an alkyl halide or aromatic halide compound to obtain a solid catalyst precursor, wherein the alkoxysilane compound and halogenized silicon compound are combined prior to either being exposed to the halogenized transition metal compound, and wherein the alkyl halide or aromatic halide compound is introduced to the reactor as the final step.
Claims26
A catalyst precursor, prepared by a process comprising the steps of combining in a reactor:
- magnesium;
- a compound having the formula R1mSi(OR2)n,
- wherein R1 and R2 are independently C1-C20 hydrocarbyl, m is 0-3, n is 1-4, and m+n=4, and wherein each R1 and each R2 may be the same or different;
- a compound having the formula R3xSiXy,
- wherein R3 is C1-C20 hydrocarbyl, X is halogen, x is 0-3, y is 1-4, and x+y=4, and wherein each X and each R3 may be the same or different;
- a compound having the formula M(OR4)aX4-a,
- wherein M is a transition metal selected from the group consisting of Ti, Zr, Hf, and V,
- wherein R4 is C1-C20 hydrocarbyl, X is halogen, and 0<a≦4
- wherein each X and each R4 may be the same or different;
- a substituted aromatic furan compound having a structural formula,
- wherein R5 and R8 are independently C1-C20 hydrocarbons, and
- wherein R6 and R7 are independently hydrogen or C1-C20 hydrocarbons;
- and an alkyl halide or aromatic halide compound having the formula R9X,
- wherein R9 is an alkyl group containing from 3 to 20 carbon atoms or an aromatic group containing from 6 to 18 carbon atoms and X is halogen;
- wherein the compounds having the formulas R1mSi(OR2)n and R3xSiXy are combined prior to either being exposed to the compound having the formula M(OR4)aX4-a, and
- wherein the alkyl halide or aromatic halide compound having the formula R9X is introduced to the reactor after the addition of magnesium, the substituted aromatic furan, and the compounds having the formulas R1mSi(OR2)n, R3xSiXy, and M(OR4)aX4-a.
A catalyst precursor prepared by:
- (i) mixing a metallic magnesium powder with iodine, alkyl-alcohol, and alkylhalide;
- (ii) contacting a compound having the formula R1mSi(OR2)n with a compound having the formula R3xSiXy in the presence of the mixture of step (i);
- wherein R1 and R2 are independently C1-C20 hydrocarbyl, m is 0-3, n is 1-4, and m+n=4, and wherein each R1 and each R2 may be the same or different, and wherein R3 is C1-C20 hydrocarbyl, X is halogen, x is 0-3, y is 1-4, and x+y=4, and wherein each X and each R3 may be the same or different;
- (iii) contacting a compound having the formula M(OR4)aX4-a with the mixture of step (ii)
- wherein M is a transition metal selected from the group consisting of Ti, Zr, Hf, and V, R4 is C1-C20 hydrocarbyl, X is halogen, and 0<a≦4, and wherein each X and each R4 may be the same or different
- (iv) contacting the mixture of step (iii) with a substituted aromatic furan compound having a structural formula,
- wherein R5 and R8 are independently C1-C20 hydrocarbons, and
- wherein R6 and R7 are independently hydrogen or C1-C20 hydrocarbons;
- and
- (v) contacting the mixture of step (iv) with alkyl halide or aromatic halide compound having the formula R9X,
- wherein R9 is an alkyl group containing from 3 to 20 carbon atoms or an aromatic group containing from 6 to 18 carbon atoms and X is halogen,
- to yield a solid catalyst precursor.
Dependencies are inferred from the claim text.