# US 2019/0169324 A1 · Magnesium alkoxide catalyst support and the preparation method and use thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0169324 A1 - Document ID: US20190169324A1 - Status: Published application - Kind: A1 - Application number: 16/201,973 - Filed: 2018-11-27 - Published: 2019-06-06 - Earliest claimed: 2017-12-01 - Assignees: PetroChina Company Limited - Applicants: PetroChina Company Limited - Inventors: Jianjun YI; Kefeng Wang; Jie Hu; Xingfeng Chen; Yuan Yuan; Weisong Cui; Liang Cui; Zhifei Li; Rongbo Li - Web page: https://patentgrep.com/patent/US20190169324A1 ## CPC - C08F 10/00: Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond - C08F 4/02: Carriers therefor - C08F 2410/01: Additive used together with the catalyst, excluding compounds containing Al or B - C08F 2410/06: Catalyst characterized by its size - C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS ## 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. ## Claims ### Claim 1 A method for preparing a magnesium alkoxide catalyst support, characterized in that, the method 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; 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 aliphatic esters or aromatic esters having 1 to 20 carbon atoms. ### Claim 2 (depends on 1) The method for preparing a magnesium alkoxide catalyst support according to claim 1, characterized in that, 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. ### Claim 3 (depends on 1) The method for preparing a magnesium alkoxide catalyst support according to claim 1, characterized in that, the metallic magnesium, the monohydric alcohol and the halogenating agent are added at one time or in multiple times. ### Claim 4 (depends on 3) The method for preparing a magnesium alkoxide catalyst support according to claim 3, characterized in that, the metallic magnesium, the monohydric alcohol and the halogenating agent are added in multiple times. ### Claim 5 (depends on 1) The method for preparing a magnesium alkoxide catalyst support according to claim 1, characterized in that, the metallic magnesium has a particle size of 0.5 μm to 300 μm. ### Claim 6 (depends on 1) The method for preparing a magnesium alkoxide catalyst support according to claim 1, characterized in that, the monohydric alcohol includes one or more selected from aliphatic alcohols or aromatic alcohols having 1 to 10 carbon atoms, wherein the monohydric alcohol includes one or more selected from 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 and phenyl propanol. ### Claim 7 (depends on 6) The method for preparing a magnesium alkoxide catalyst support according to claim 6, characterized in that, the monohydric alcohol includes one or more selected from methanol, ethanol, propanol and butanol. ### Claim 8 (depends on 1) The method for preparing a magnesium alkoxide catalyst support according to claim 1, characterized in that, 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. ### Claim 9 (depends on 8) The method for preparing a magnesium alkoxide catalyst support according to claim 8, characterized in that, the halogenating agent includes one or more selected from iodine, carbon tetrachloride, magnesium iodide, magnesium chloride and alkoxy magnesium halide. ### Claim 10 (depends on 1) The method for preparing a magnesium alkoxide catalyst support according to claim 1, characterized in that, 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. ### Claim 11 (depends on 1) The method for preparing a magnesium alkoxide catalyst support according to claim 1, characterized in that, 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. ### Claim 12 (depends on 1) A magnesium alkoxide catalyst support, characterized in that, the magnesium alkoxide catalyst support is prepared by the method for preparing a magnesium alkoxide catalyst support according to claim 1. ### Claim 13 (depends on 12) Use of the magnesium alkoxide catalyst support according to claim 12, characterized in that, the magnesium alkoxide catalyst support is used to catalyze olefin polymerization. ### Claim 14 (depends on 12) The magnesium alkoxide catalyst support according to claim 12, wherein the magnesium alkoxide catalyst support has an average particle size (D50) of about 20 μm to about 50 μm. ### Claim 15 (depends on 13) The use according to claim 13, wherein the olefin polymerization is selected from a gas-phase polymerization and a bulk polymerization.