A method of making an olefin polymerization catalyst carrier with a general structure formula of Mg(OR.sup.I).sub.n(OR.sup.II).sub.2-n, wherein: 0n2, and R.sup.I and R.sup.II can be the same or different and are each independently selected from a C.sub.1-C.sub.20 hydrocarbon group by reacting an alcohol with a metal magnesium powder under the protection of nitrogen in the presence of a halogen or a halogen-containing compound to obtain a first product, and subjecting the product to a treatment pressure of from 0.2 to 5.0 MPa at a treatment temperature of from 80 to 200 C. for a duration of between 2 minutes and 6 hours. Also provided is a method of making an olefin polymerization solid catalyst component which includes the catalyst carrier, a titanium compound, and at least one electron donor compound.

A method of making an olefin polymerization catalyst carrier with a general structure formula of Mg(OR.sup.I).sub.n(OR.sup.II).sub.2-n, wherein: 0n2, and R.sup.I and R.sup.II can be the same or different and are each independently selected from a C.sub.1-C.sub.20 hydrocarbon group by reacting an alcohol with a metal magnesium powder under the protection of nitrogen in the presence of a halogen or a halogen-containing compound to obtain a first product, and subjecting the product to a treatment pressure of from 0.2 to 5.0 MPa at a treatment temperature of from 80 to 200 C. for a duration of between 2 minutes and 6 hours. Also provided is a method of making an olefin polymerization solid catalyst component which includes the catalyst carrier, a titanium compound, and at least one electron donor compound.

The invention provides a metal alkoxide complex of Formula (I), wherein X, M, R1, R2, R3, m, n, y and z are as defined in the Description. The invention also provides a catalyst composition comprising the metal alkoxide complex and a hydroxy-containing compound, wherein the molar ratio of the metal alkoxide complex to the hydroxy-containing compound is 1:0.1-1000. The invention also provides a production method of poly--caprolactone or polyactide, wherein an -caprolactone monomer or a lactide monomer is reacted in the presence of the metal alkoxide complex or catalyst composition to obtain poly--caprolactone or polylactide. The metal alkoxide complex and the catalyst composition thereof can be used to catalyze the synthesis of poly--caprolactone or polylactide with a high efficiency. The molecular weight of polycaprolactone or polylactide can be controlled by the molar ratio of the metal alkoxide complex and the hydroxy-containing compound, and is adjustable in the range of 1000-600,000, and wherein the molecular weight distribution is from 1.03 to 1.50.
[X.sub.n-mM(OCR.sub.1R.sub.2R.sub.3).sub.m].sub.y.(organic solvent).sub.z (I)

The invention provides a metal alkoxide complex of Formula (I), wherein X, M, R1, R2, R3, m, n, y and z are as defined in the Description. The invention also provides a catalyst composition comprising the metal alkoxide complex and a hydroxy-containing compound, wherein the molar ratio of the metal alkoxide complex to the hydroxy-containing compound is 1:0.1-1000. The invention also provides a production method of poly--caprolactone or polyactide, wherein an -caprolactone monomer or a lactide monomer is reacted in the presence of the metal alkoxide complex or catalyst composition to obtain poly--caprolactone or polylactide. The metal alkoxide complex and the catalyst composition thereof can be used to catalyze the synthesis of poly--caprolactone or polylactide with a high efficiency. The molecular weight of polycaprolactone or polylactide can be controlled by the molar ratio of the metal alkoxide complex and the hydroxy-containing compound, and is adjustable in the range of 1000-600,000, and wherein the molecular weight distribution is from 1.03 to 1.50.
[X.sub.n-mM(OCR.sub.1R.sub.2R.sub.3).sub.m].sub.y.(organic solvent).sub.z (I)

The invention provides a metal alkoxide complex of Formula (I), wherein X, M, R1, R2, R3, m, n, y and z are as defined in the Description. The invention also provides a catalyst composition comprising the metal alkoxide complex and a hydroxy-containing compound, wherein the molar ratio of the metal alkoxide complex to the hydroxy-containing compound is 1:0.1-1000. The invention also provides a production method of poly--caprolactone or polyactide, wherein an -caprolactone monomer or a lactide monomer is reacted in the presence of the metal alkoxide complex or catalyst composition to obtain poly--caprolactone or polylactide. The metal alkoxide complex and the catalyst composition thereof can be used to catalyze the synthesis of poly--caprolactone or polylactide with a high efficiency. The molecular weight of polycaprolactone or polylactide can be controlled by the molar ratio of the metal alkoxide complex and the hydroxy-containing compound, and is adjustable in the range of 1000-600,000, and wherein the molecular weight distribution is from 1.03 to 1.50.
[X.sub.n-mM(OCR.sub.1R.sub.2R.sub.3).sub.m].sub.y.(organic solvent).sub.z (I)

A compound useful for the manufacture of a Group 5 metal oxide film is provided. The compound is a Group 5 metal oxo-alkoxo complex represented by the following formula (A), and after preparing a film-forming material solution containing the compound and an organic solvent, a Group 5 metal oxide film can be manufactured using the film-forming material solution:
M.sub.(.sub.4-O).sub.(.sub.3-O).sub.(-O).sub.(-OR.sup.A).sub.(OR.sup.A).sub.(R.sup.AOH).sub.X.sub.Y.sub..Math.(A)
(wherein M represents a niobium atom, etc.; R.sup.A represents an alkyl group; X represents an alkylenedioxy group; Y represents a carboxy group, etc.; represents an integer of 3 to 10; represents 0 or 1; represents an integer of 0 to 8; represents an integer of 2 to 9; represents an integer of 0 to 6; represents an integer of 6 to 16; represents an integer of 0 to 4; represents an integer of 0 to 2; and .Math. represents an integer of 0 to 6).

A compound useful for the manufacture of a Group 5 metal oxide film is provided. The compound is a Group 5 metal oxo-alkoxo complex represented by the following formula (A), and after preparing a film-forming material solution containing the compound and an organic solvent, a Group 5 metal oxide film can be manufactured using the film-forming material solution:
M.sub.(.sub.4-O).sub.(.sub.3-O).sub.(-O).sub.(-OR.sup.A).sub.(OR.sup.A).sub.(R.sup.AOH).sub.X.sub.Y.sub..Math.(A)
(wherein M represents a niobium atom, etc.; R.sup.A represents an alkyl group; X represents an alkylenedioxy group; Y represents a carboxy group, etc.; represents an integer of 3 to 10; represents 0 or 1; represents an integer of 0 to 8; represents an integer of 2 to 9; represents an integer of 0 to 6; represents an integer of 6 to 16; represents an integer of 0 to 4; represents an integer of 0 to 2; and .Math. represents an integer of 0 to 6).

The present invention relates to halogenated indium oxo alkoxides of the generic formula In.sub.7O.sub.2(OH)(OR).sub.12X.sub.4(ROH).sub.x where R=C1-C15-alkyl, C1-C15-alkenyl, C1-C15-alkynyl, C1-C15-alkoxyalkyl, C6-C15-aryl- or C7-C15-alkoxyaryl, XF, Cl, Br, I and x=0 to 10, to processes for preparation thereof and to use thereof.

The present invention relates to halogenated indium oxo alkoxides of the generic formula In.sub.7O.sub.2(OH)(OR).sub.12X.sub.4(ROH).sub.x where R=C1-C15-alkyl, C1-C15-alkenyl, C1-C15-alkynyl, C1-C15-alkoxyalkyl, C6-C15-aryl- or C7-C15-alkoxyaryl, XF, Cl, Br, I and x=0 to 10, to processes for preparation thereof and to use thereof.