Magnesium alkoxide particle and application thereof

Patent metadata

Field	Value
Publication number	US-11332425-B2
Application number	US-201716345596-A
Country	US
Kind code	B2
Filing date	Oct 26, 2017
Priority date	Oct 26, 2016
Publication date	May 17, 2022
Grant date	May 17, 2022

Abstract

The magnesium alkoxide particle contains the reaction product of the following components: 1) a magnesium powder; 2) a mixed alcohol; 3) a halogenating agent; and 4) a titanate compound. The magnesium alkoxide particle is used for preparing a catalyst for olefin polymerization.

First claim

The invention claimed is:

1. An alkoxymagnesium particle, comprising a reaction product of a reaction mixture comprising reactants of 1) magnesium powder; 2) a mixed alcohol; 3) a halogenating agent; 4) a titanate compound; and optionally 5) a dispersing agent, wherein the alkoxymagnesium particle comprises titanium in an interior and on a surface thereof, the bulk density units should be changed from g/m 3 to g/cm 3
wherein a mass percentage of the titanate compound is 0.1-8.0 wt % of a total weight of the alkoxymagnesium particle, and
wherein the dispersing agent is selected from hexane, heptane, octane, decane, benzene, toluene, xylene, and mixtures thereof.

2. The alkoxymagnesium particle according to claim 1 , wherein the titanate compound has a structure of Formula I:
(R 1 O) a Ti(OR 2 ) b (OR 3 ) c X d   Formula I,

wherein R 1 , R 2 and R 3 are identical to or different from each other, and are independently H or an alkyl; X is selected from alkoxy, carboxyl, halogen, sulfonic acid group, phosphoric acid group, and sulfuric acid group; and each of a, b, c and d independently represents an integer number in a range of 0 to 4, and a+b+c+d=4.

3. The alkoxymagnesium particle according to claim 1 , wherein the halogenating agent is an elementary halogen and/or an inorganic halide, and the mixed alcohol is a linear or branched monohydric alcohol or polyhydric alcohol.

4. The alkoxymagnesium particle according to claim 1 , wherein a molar ratio of the halogenating agent to the magnesium powder measured by halogen atoms is (0.0002-0.2):1 and a molar ratio of the mixed alcohol to the magnesium powder is (2-50):1.

5. The alkoxymagnesium particle according to claim 1 , wherein the mixed alcohol is a mixture of ethanol and isooctanol and the halogenating agent is a mixture iodine and magnesium chloride.

6. The alkoxymagnesium particle according to claim 5 , wherein a molar ratio between the dispersion agent and the titanate compound is the reaction mixture used is 1.3 mol to 1.45 mmol to 1.3 mol to 17.6 mmol.

7. An alkoxymagnesium particle, comprising a titanate compound in the particle, wherein the titanate compound is distributed from an interior and to a surface of the alkoxymagnesium particle and has a bulk density in a range of 0.40 g/cm 3 to 0.47 g/cm 3 , and a mass percentage of the titanate compound is 0.1-8.0 wt % of a total weight of the alkoxymagnesium particle.

8. The alkoxymagnesium particle according to claim 7 , wherein the titanate compound has a structure as shown in formula I:
(R 1 O) a Ti(OR 2 ) b (OR 3 ) c X d   Formula I,

wherein, R 1 , R 2 and R 3 are identical to or different from each other, and are independently selected from a group consisting of H and alkyl; X is selected from a group consisting of alkoxy, carboxyl, halogen, sulfonic acid group, phosphoric acid group, and sulfuric acid group; and each of a, b, c and d independently represents an integer number in a range of 0 to 4, and a+b+c+d=4.

9. The alkoxymagnesium particle according to claim 7 , wherein a method for preparing the alkoxymagnesium particle comprises: providing a reaction mixture comprising reactants of 1) a magnesium powder, 2) a mixed alcohol, 3) a halogenating agent, and 4) the titanate compound, and carrying out a reaction in the reaction mixture to form the alkoxymagnesium particle.

10. The alkoxymagnesium particle according to claim 9 , wherein a weight ratio of the titanate compound to the magnesium powder is (0.01-5):1.

11. The alkoxymagnesium particle according to claim 9 , wherein a molar ratio of the halogenating agent to the magnesium powder measured by halogen atoms is (0.0002-0.2):1.

12. The alkoxymagnesium particle according to claim 9 , wherein the reaction mixture further comprises a dispersing agent, and the dispersing agent is an inert organic solvent.

13. A Ziegler-Natta catalyst component, comprising a reaction product of the alkoxymagnesium particle of claim 1 ,
a titanium-containing halide, and
an electron donor compound.

14. The catalyst component according to claim 13 , wherein the electron donor compound is selected from a carboxylate compound, a 2,3-di-non-linear alkyl-2-cyano disuccinate compound, an aliphatic ether compound, and mixtures thereof,
wherein the carboxylate compound is a mono benzoate compound or a phthalate compound as shown in Formula II

wherein, in Formula II, R 1 and R 2 are identical to or different from each other, and are independently selected from the group consisting of substituted or unsubstituted C 1 -C 8 alkyl, C 3 -C 10 cycloalkyl or C 6 -C 20 aryl; R 3 -R 6 are independently selected from the group consisting of hydrogen, halogen, C 1 -C 4 alkyl, and C 1 -C 4 alkoxy, and/or,
the 2,3-di-non-linear alkyl-2-cyano disuccinate compound has a structure of Formula III:

wherein, R 1 and R 2 are identical to or different from each other, and each is a linear alky of 1 to 10 carbon atoms, a branched alkyl or cycloalkyl of 3 to 10 carbon atoms, an aryl of 6 to 10 carbon atoms, an alkaryl or aralkyl of 7 to 10 carbon atoms, wherein a hydrogen atom on a carbon in said alkyl, cycloalkyl, aryl, alkaryl or aralkyl is unsubstituted or substituted by a halogen (hetero) atom, alkyl, or alkoxy, and a carbon atom on a main chain is unsubstituted or substituted by a hetero atom; and/or,
wherein the aliphatic ether compound is at least one selected from the group consisting of: 2,2′-di-n-propyl-1,3-dimethyl ether, 2,2′-diisopropyl-1,3-dimethyl ether, 2,2′-di-n-butyl-1,3-dimethyl ether, 2,2′-diisobutyl-1,3-dimethyl ether, 2,2′-di-n-pentyl-1,3-dimethyl ether, 2,2′-diisopentyl-1,3-dimethyl ether, 2,2′-di-n-hexyl-1,3-dimethyl ether, 2,2′-diisohexyl-1,3-diether, 2-n-propyl-2-isopropyl-1,3-dimethyl ether, 2-n-propyl-2-n-butyl-1,3-dimethyl ether, 2-n-propyl-2-isobutyl-1,3-dimethyl ether, 2-n-propyl-2-n-pentyl-1,3-dimethyl ether, 2-n-propyl-2-isopentyl-1,3-dimethyl ether, 2-n-propyl-2-n-hexyl-1,3-dimethyl ether, 2-n-propyl-2-isohexyl-1,3-dimethyl ether, 2-isopropyl-2-n-butyl-1,3-dimethyl ether, 2-isopropyl-2-isobutyl-1,3-dimethyl ether, 2-isopropyl-2-n-pentyl-1,3-dimethyl ether, 2-isopropyl-2-isopentyl-1,3-dimethyl ether, 2-isopropyl-2-n-hexyl-1,3-dimethyl ether, 2-isopropyl-2-isohexyl-1,3-dimethyl ether, 2-n-butyl-2-isobutyl-1,3-dimethyl ether, 2-n-butyl-2-n-pentyl-1,3-dimethyl ether, 2-n-butyl-2-isopentyl-1,3-dimethyl ether, 2-n-butyl-2-n-hexyl-1,3-dimethyl ether, 2-n-butyl-2-isohexyl-1,3-dimethyl ether, 2-isobutyl-2-n-pentyl-1,3-dimethyl ether, 2-isobutyl-2-isopentyl-1,3-dimethyl ether, 2-isobutyl-2-n-hexyl-1,3-dimethyl ether, 2-isobutyl-2-isohexyl-1,3-dimethyl ether, 2-n-pentyl-2-isopentyl-1,3-dimethyl ether, 2-n-pentyl-2-n-hexyl-1,3-dimethyl ether, 2-n-pentyl-2-isohexyl-1,3-dimethyl ether, 2-isopentyl-2-n-hexyl-1,3-dimethyl ether, 2-isopentyl-2-isohexyl-1,3-dimethyl ether, and 2-n-hexyl-2-isohexyl-1,3-dimethyl ether and/or,
the titanium-containing halide is of Formula IV:
TiX n (OR 7 ) 4-n   Formula IV

wherein, in Formula IV, X is halogen; R 7 is C 1 -C 20 alkyl; and n is an integer number in a range of 0-4.

15. A catalyst for olefin polymerization, comprising a reaction product of the following components:
(1) the catalyst component according to claim 13 ;
(2) an organic aluminum compound; and
(3) optionally, an external electron donor compound.

16. The catalyst according to claim

Assignees

• China Petroleum & Chem Corp
• Beijing Res Inst Chemical Ind China Petroleum & Chemical Corp

Inventors

• Xu Xiudong
• Tan Zhong
• Zhou Qilong
• Zhang Rui
• Song Weiwei
• Yu Jinhua
• Li Fengkui
• Yin Shanshan

Classifications

• C08F4/649

  organic · CPC title

• C07C31/30 Primary

  Alkali metal or alkaline earth metal alcoholates · CPC title

• C08F4/651

  Pretreating with non-metals or metal-free compounds · CPC title

• C07C29/70

  by converting hydroxy groups to O-metal groups {(C07C29/09 takes precedence)} · CPC title

• C08F10/06

  Propene · CPC title