Carrier for olefin polymerization catalyst, preparation method and application thereof

Patent metadata

Field	Value
Publication number	US-9321857-B2
Application number	US-201013501850-A
Country	US
Kind code	B2
Filing date	Oct 18, 2010
Priority date	Oct 16, 2009
Publication date	Apr 26, 2016
Grant date	Apr 26, 2016

Abstract

A spheric magnesium compound comprises a reaction product of at least the following components: (a) a magnesium halide having a formula of MgX 2-n R n , wherein X is independently chloride or bromide, R is a C 1 -C 14 alkyl, a C 6 -C 14 aryl, a C 1 -C 14 alkoxy, or a C 6 -C 14 aryloxy, and n is 0 or 1; (b) an alcohol compound; and (c) an epoxy compound having a general formula (I), wherein R 2 and R 3 are independently hydrogen, a C 1 -C 5 linear or branched alkyl, or a C 1 -C 5 linear or branched haloalkyl. The magnesium compound has characteristic DSC curve and X-ray diffraction pattern, and can be used as a carrier for olefin polymerization catalyst.

stereoregularity of polymer having high melt index, and low content of polymer fines.

First claim

What is claimed is:

1. A particulate spheric magnesium-containing carrier comprising solid particles directly formed in the reaction of at least the following components:
(a) a magnesium halide represented by a general formula of MgX 2-n R n , wherein X is independently chloride or bromide, R is a C 1 -C 14 alkyl, a C 6 -C 14 aryl, a C 1 -C 14 alkoxy, or a C 6 -C 14 aryloxy, and n is 0 or 1;
(b) an alcohol compound; and
(c) an epoxy compound represented by a general formula (I):

wherein R 2 and R 3 are independently hydrogen, a C 1 -C 5 linear or branched alkyl, or a C 1 -C 5 linear or branched haloalkyl.

2. The magnesium-containing carrier of claim 1 , wherein the alcohol compound is at least one represented by a general formula of R 1 OH, wherein R 1 is a C 1 -C 12 alkyl, a C 3 -C 10 cycloalkyl, a C 7 -C 12 aralkyl or a C 6 -C 10 aryl.

3. The magnesium-containing carrier of claim 2 , wherein R 1 is a C 1 -C 8 alkyl.

4. The magnesium-containing carrier of claim 1 , wherein the magnesium halide is magnesium dichloride.

5. The magnesium-containing carrier of claim 1 , wherein R 2 and R 3 , which are the same or different, represent hydrogen, a C 1 -C 3 alkyl or a C 1 -C 3 haloalkyl.

6. The magnesium-containing carrier of claim 1 , wherein in the formation of the magnesium compound, the amount of the component (2) used ranges from 4 to 40 moles, and the amount of the component (3) used ranges from 1 to 10 moles, relative to one mole of the magnesium halide.

7. The magnesium-containing carrier of claim 6 , wherein the amount of the component (2) used ranges from 6 to 20 moles, and the amount of the component (3) used ranges from 2 to 6 moles, relative to one mole of the magnesium halide.

8. The magnesium-containing carrier of claim 1 , which has a characteristic X-ray diffraction pattern characterized in that in a 2θ angle range of from 5° to 15°, there are at least two diffraction lines, wherein the intensest diffraction line appears at a diffraction angle 2θ of 10.0±0.4°, and the secondary intensest diffraction line appears at a diffraction angle 2θ of from 10.5 to 12.5°, and has an intensity of at least 0.2 times the intensity of the intensest diffraction line.

9. The magnesium-containing carrier of claim 8 , wherein the X-ray diffraction pattern of the magnesium compound is further characterized in that diffraction lines appeared in the 2θ angle range of from 5° to 15° other than the intensest and the secondary intensest diffraction lines have intensities of less than 0.2 times the intensity of the intensest diffraction line.

10. The magnesium-containing carrier of claim 8 , wherein the X-ray diffraction pattern of the magnesium compound is further characterized in that in a 2θ angle range of from 15 to 32°, there is a broad diffraction peak with a peak maximum in a 2θ angle range of from 20 to 21°.

11. The magnesium-containing carrier of claim 8 , wherein the X-ray diffraction pattern of the magnesium compound is further characterized in that in a 2θ angle range of from 15 to 32°, there is a broad diffraction peak with a peak maximum in a 2θ angle range of from 20 to 21° and at least one shoulder peak at a 2θ angle of 16.5±0.4° and/or 25.6±0.4°.

12. The magnesium-containing carrier of claim 8 , wherein the secondary intensest diffraction line appears at a diffraction angle 2θ of 11.5±0.4°.

13. The magnesium-containing carrier of claim 1 , which has a characteristic DSC profile characterized by having a distinct exothermal peak in a temperature range of from 70 to 250° C., said exothermal peak having a peak maximum at a temperature of from 100 to 220° C. and an associated exothermal enthalpy of larger than 40 J/g.

14. The magnesium-containing carrier of claim 13 , wherein the DSC profile of the magnesium compound is characterized in that the peak maximum of the exothermal peak appears at a temperature of from 100 to 200° C.

15. The magnesium-containing carrier of claim 13 , wherein the DSC profile of the magnesium compound is characterized in that the peak maximum of the exothermal peak appears at a temperature of from 130 to 210° C.

16. The magnesium-containing carrier of claim 13 , wherein the DSC profile of the magnesium compound is characterized in that the peak maximum of the exothermal peak appears at a temperature of from 130 to 200° C.

17. The magnesium-containing carrier of claim 13 , wherein the DSC profile of the magnesium compound is characterized in that the exothermal peak has an associated exothermal enthalpy of larger than 100 J/g.

18. A process for preparing a magnesium-containing carrier, comprising
a) mixing a magnesium halide of a general formula of MgX 2-n R n , an alcohol compound and an optional inert liquid medium in a vessel, heating the resultant mixture to a temperature of from 30 to 160° C. and allowing it to react, to form a magnesium halide-alcohol adduct solution; and
b) reacting the magnesium halide-alcohol adduct solution with an epoxy compound of the general formula (I):

at a temperature of from 30 to 160° C., to form a particulate spheric magnesium-containing carrier,
wherein R, X, R 2 and R 3 are as defined in claim 1 .

19. The process of claim 18 , having at least one of the following features:
in step a), the vessel is a closed vessel;
the alcohol compound is at least one represented by a general formula of R 1 OH, wherein R 1 is a C 1 -C 12 alkyl, a C 3 -C 10 cycloalkyl, a C 7 -C 12 aralkyl or a C 6 -C 10 aryl;
the magnesium halide is magnesium dichloride;
in the general formula (I), R 2 and R 3 , which are the same or different, represent hydrogen, a C 1 -C 3 alkyl or a C 1 -C 3 haloalkyl;
the inert liquid medium is used in step a), and the amount thereof is from ⅓ L to 20 L, relative to one mole of the magnesium halide; and
the amount of the alcohol compound used ranges from 4 to 40 moles, and the amount of the epoxy compound used ranges from 1 to 10 moles, relative to one mole of the magnesium halide.

20. The process of claim 18 , having at least one of the following features:
the inert liquid medium is used in step a), and the amount thereof is from ⅔ L to 10 L, relative to one mole of the magnesium halide; and
the amount of the alcohol compound used ranges from 6 to 20 moles, and the amount of the epoxy compound used ranges from 2 to 6 moles, relative to one mole of the magnesium halide.

Assignees

• Li Weili
• Xia Xianzhi
• Liu Yuexiang
• Zhang Jigui
• Qiao Suzhen
• Zhao Jin
• Gao Ping
• Wang Xinsheng
• Tan Yang
• Zhang Zhihui
• Yang Linna
• Duan Ruilin
• Peng Renqi
• China Petroleum & Chemical
• Beijing Res Inst Chem Ind

Inventors

• Li Weili
• Xia Xianzhi
• Liu Yuexiang
• Zhang Jigui
• Qiao Suzhen
• Zhao Jin
• Gao Ping
• Wang Xinsheng
• Tan Yang
• Zhang Zhihui
• Yang Linna
• Duan Ruilin
• Peng Renqi

Classifications

• C08F10/00 Primary

  Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond · CPC title

• C08F110/06

  Propene · CPC title

• C08F4/64

  Titanium, zirconium, hafnium or compounds thereof · CPC title

• C08F4/02 Primary

  Carriers therefor · CPC title

• C07F3/003

  without C-Metal linkages · CPC title