Toluene Free Silica Supported Single-Site Metallocene Catalysts from In-Situ Supported MAO Formation in Aliphatic Solvents
AssigneeExxonMobil Chemical Patents Inc.
InventorsLubin Luo, Anupriya Jain, Charles J. Harlan
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Abstract
The present disclosure provides a method for preparing a catalyst system comprising contacting in an aliphatic solvent at a temperature of from less than 0° C. to −60° C. at least one support material having absorbed water and at least one hydrocarbyl aluminum compound to form a supported alumoxane (catalyst precursor) and contacting the supported alumoxane with at least one catalyst compound having a Group 3 through Group 12 metal atom or lanthanide metal atom. The supported alumoxane may be heated prior to contact with the catalyst compound.
Claims50
A method for preparing supported alumoxane comprising contacting in an aliphatic solvent at a temperature of from less than 0° C. to −60° C. at least one support material having absorbed water and at least one hydrocarbyl aluminum compound.
A continuous process for preparing supported alumoxane comprising contacting in an aliphatic solvent at a temperature of from less than 0° C. to −60° C. at least one support material having absorbed water and at least one hydrocarbyl aluminum compound to produce a silica supported alumoxane, separating the silica supported alumoxane from the aliphatic solvent and recycling the aliphatic solvent and any excess hydrocarbyl aluminum.
A method for preparing a catalyst system comprising contacting in an aliphatic solvent at a temperature of from less than 0° C. to −60° C. at least one support material having absorbed water and at least one hydrocarbyl aluminum compound to form a supported alumoxane and contacting the supported alumoxane with at least one catalyst compound having a Group 3 through Group 12 metal atom or lanthanide metal atom.
The method of 31, wherein the catalyst compound is represented by Formula (II) or Formula (III):
- wherein M is Hf, Zr, or Ti. X1, X2, R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, and Y are as defined for Formula (I). R11, R12, R13, R14, R15, R16, R17, R18, R19, R20, R21, R22, R23, R24, R25, R26, R27, and R28 is independently a hydrogen, C1-C40 hydrocarbyl, C1-C40 substituted hydrocarbyl, a functional group comprising elements from Groups 13 to 17, or two or more of R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, R16, R17, R18, R19, R20, R21, R22, R23, R24, R25, R26, R27, and R28 may independently join together to form a C4-C62 cyclic or polycyclic ring structure, or a combination thereof;
- R11 and R12 may join together to form a five- to eight-membered heterocycle;
- Q* is a group 15 or 16 atom;
- z is 0 or 1;
- J* is CR″ or N, and G* is CR″ or N, where R″ is C1-C20 hydrocarbyl or carbonyl-containing C1-C20 hydrocarbyl;
- and z=0 if Q* is a group 16 atom;
- and z=1 if Q* is a group 15 atom.
A method for preparing a catalyst system comprising contacting in an aliphatic solvent at a temperature of from less than 0° C. to −60° C. at least one support material having absorbed water and at least one hydrocarbyl aluminum compound to form a supported alumoxane, heating the supported alumoxane to at least 60° C. up to 140° C. and contacting the heated supported alumoxane with at least one catalyst compound having a Group 3 through Group 12 metal atom or lanthanide metal atom.
A method for preparing a catalyst system comprising contacting in an aliphatic solvent at a temperature of from less than 0° C. to −60° C. at least one support material having absorbed water and at least one hydrocarbyl aluminum compound to form a supported alumoxane, contacting the supported alumoxane with at least one catalyst compound having a Group 3 through Group 12 metal atom or lanthanide metal atom to form a supported catalyst system and heating the supported catalyst system to at least 60° C. up to 140° C.
A process of making a supported aluminoxane free of aromatic solvent comprising adding at least one support material having absorbed water as a solid form to a hydrocarbyl aluminum aliphatic solvent solution at a temperature of from less than 0° C. to about −60° C.
A process of making a supported aluminoxane free of aromatic solvent comprising adding an aliphatic solution of at least one support material having absorbed water to hydrocarbyl aluminum aliphatic solvent solution at a temperature of from about less than 0° C. to about −60° C.
Dependencies are inferred from the claim text.