Magnesium alkoxide catalyst support and the preparation method and use thereof

Patent metadata

Field	Value
Publication number	US-11084890-B2
Application number	US-201816201973-A
Country	US
Kind code	B2
Filing date	Nov 27, 2018
Priority date	Dec 1, 2017
Publication date	Aug 10, 2021
Grant date	Aug 10, 2021

Abstract

A magnesium alkoxide catalyst support and the preparation method and use thereof are provided. The method for preparing the magnesium alkoxide catalyst support comprises the following steps: mixing a metallic magnesium, a monohydric alcohol, a halogenating agent and a surfactant at 0° C. to 90° C. under an inert gas atmosphere, and then washing the resultant with an inert solvent to obtain the magnesium alkoxide catalyst support. A magnesium alkoxide catalyst support obtained by the above method is also provided, which can be used to catalyze olefin polymerization. The magnesium alkoxide catalyst support obtained by the above method according to the invention has excellent particle morphology and controllable size, and is suitable for preparing a catalyst for olefin polymerization.

First claim

What is claimed is:

1. A method for preparing a magnesium alkoxide catalyst support, comprising the following steps:
mixing a metallic magnesium, a monohydric alcohol, a halogenating agent and a surfactant at 0° C. to 90° C. under an inert gas atmosphere, and then washing the resultant with an inert solvent to obtain the magnesium alkoxide catalyst support;
wherein the monohydric alcohol is added in an amount of 2 mol to 50 mol, the halogenating agent is added in an amount of 0.0025 mol to 0.03 mol, and the inert organic solvent is added in an amount of 2 mol to 50 mol, based on 1 mol of the metallic magnesium;
wherein the surfactant is added in a volume of from 0.01% to 10% based on the volume of the monohydric alcohol, and the surfactant is one or more selected from n-butyl titanate, tributyl phosphate, triphenyl phosphate, triethyl phosphite, 1,2-butanediol ditosylate, catechol di-p-tosylate, diethyl phthalate, di-n-butyl phthalate, diisobutyl phthalate, ethylene glycol diacetate and triacetin.

2. The method for preparing a magnesium alkoxide catalyst support according to claim 1 , wherein the metallic magnesium, the monohydric alcohol and the halogenating agent are added at one time or in batches.

3. The method for preparing a magnesium alkoxide catalyst support according to claim 2 , wherein the metallic magnesium, the monohydric alcohol and the halogenating agent are added in batches.

4. The method for preparing a magnesium alkoxide catalyst support according to claim 1 , wherein the metallic magnesium has a particle size of 0.5 μm to 300 μm.

5. The method for preparing a magnesium alkoxide catalyst support according to claim 1 , wherein the monohydric alcohol is selected from the group consisting of methanol, ethanol, n-propanol, isopropanol, n-butanol, isobutanol, n-pentanol, isopentanol, n-hexanol, isohexanol, n-heptanol, isoheptanol, n-octanol, isooctanol, n-nonanol, isononanol, n-decanol, isodecanol, phenol, phenyl methanol, phenyl ethanol, phenyl propanol, and any combinations thereof.

6. The method for preparing a magnesium alkoxide catalyst support according to claim 5 , wherein the monohydric alcohol includes one or more selected from methanol, ethanol, propanol and butanol.

7. The method for preparing a magnesium alkoxide catalyst support according to claim 1 , wherein the halogenating agent includes one or more selected from iodine, bromine, chlorine, magnesium iodide, magnesium bromide, magnesium chloride, calcium iodide, calcium bromide, calcium chloride, mercuric iodide, mercuric bromide, mercuric chloride, carbon tetraiodide, carbon tetrabromide, carbon tetrachloride and alkoxy magnesium halide.

8. The method for preparing a magnesium alkoxide catalyst support according to claim 7 , wherein the halogenating agent includes one or more selected from iodine, carbon tetrachloride, magnesium iodide, magnesium chloride and alkoxy magnesium halide.

9. The method for preparing a magnesium alkoxide catalyst support according to claim 1 , wherein the inert organic solvent includes one or more selected from hexane, heptane, octane, decane, benzene, toluene, xylene, chlorobenzene, a toluene derivative, a xylene derivative and a chlorobenzene derivative.

10. The method for preparing a magnesium alkoxide catalyst support according to claim 1 , wherein the monohydric alcohol is added in an amount of 5 mol to 20 mol, and the halogenating agent is added in an amount of 0.0025 mol to 0.01 mol, based on 1 mol of the metallic magnesium.

Assignees

• Petrochina Co Ltd

Inventors

• Yi Jianjun
• Wang Kefeng
• Hu Jie
• Chen Xingfeng
• Yuan Yuan
• Cui Weisong
• Cui Liang
• Li Zhifei
• Li Rongbo

Classifications

• C08F2410/06

  Catalyst characterized by its size · CPC title

• C08F2410/01

  Additive used together with the catalyst, excluding compounds containing Al or B · CPC title

• C08F4/02

  Carriers therefor · CPC title

• C08F10/00 Primary

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

• C08F4/6548

  magnesium or compounds thereof, not provided for in C08F4/6543 or C08F4/6546 · CPC title