Arylaminosilane compound, propylene polymerization catalyst and preparation thereof

Patent metadata

Field	Value
Publication number	US-11535638-B2
Application number	US-202016843476-A
Country	US
Kind code	B2
Filing date	Apr 8, 2020
Priority date	May 23, 2019
Publication date	Dec 27, 2022
Grant date	Dec 27, 2022

Abstract

The present disclosure discloses an arylaminosilane compound, a propylene polymerization catalyst and preparation thereof. The arylaminosilane compound has a structure of

wherein R 1 is a C 1 -C 8 alkyl group or a C 1 -C 8 silanyl group; R 2 , R 3 , R 4 , R 5 and R 6 are each independently H or a C 1 -C 12 alkyl group; R 7 , R 8 and R 9 are each independently a C 1 -C 8 alkyl group or a C 1 -C 8 alkoxy group. When the arylaminosilane compound is used as an external electron donor of a propylene polymerization catalyst in propylene polymerization reaction, the catalyst has good hydrogen response.

First claim

What is claimed is:

1. An arylaminosilane compound, wherein the arylaminosilane compound is (N-methylanilino)methyldiethoxysilane.

2. A method for preparing an arylaminosilane compound according to claim 1 , wherein a first method of the preparing method includes the following steps:
reacting an arylamine represented by Formula II with an alkyl lithium in an organic solvent under a protective gas atmosphere at −80° C. to 30° C.; adding R 7 R 8 R 9 SiCl to the reaction system without separation and reacting at −80° C. to 30° C., so as to obtain the arylaminosilane compound after the completion of the reaction;

or, a second method includes the following steps:
reacting an arylamine represented by Formula II with an alkyl lithium in an organic solvent under a protective gas atmosphere at −80° C. to 30° C.; adding (R 7 ) m SiCl 4-m to the reaction system without separation to continue the reaction, to obtain an intermediate represented by Formula III after the completion of the reaction; wherein R 7 is methyl and m is 0 or 1;

dissolving the intermediate represented by formula III in an organic solvent, adding ROH thereto, and reacting at 0° C. to 60° C. to obtain a compound of formula IV;

wherein R is a C 1 -C 8 alkyl group;
wherein the arylamine is N-methylaniline; R 7 R 8 R 9 SiCl is CH 3 (C 2 H 5 O) 2 SiCl.

3. The method according to claim 2 , wherein in the first method or the second method, the molar ratio of the arylamine to the alkyl lithium is 1: (1 to 3).

4. The method according to claim 2 , wherein in the first method, the molar ratio of the arylamine to R 7 R 8 R 9 SiCl is 1: (1 to 3);
in the second method, the molar ratio of the arylamine to (R 7 ) m SiCl 4-m is 1: (1 to 3).

5. The method according to claim 2 , wherein in the first method, the arylamine is reacted with the alkyl lithium for 1 to 48 hours; after the addition of R 7 R 8 R 9 SiCl, the reaction is carried out for 1 to 48 hours;
in the second method, the arylamine is reacted with the alkyl lithium for 1 to 48 hours; the (R 7 ) m SiCl 4-m is added to continue the reaction for 24 hours; and the intermediate represented by formula III is reacted with ROH for 4 to 60 hours.

6. The method according to claim 2 , wherein the alkyl lithium is butyl lithium.

7. The method according to claim 2 , wherein the protective gas is nitrogen, helium or argon.

8. The method according to claim 2 , wherein the organic solvent is one or a mixed solvent of toluene, benzene, diethyl ether, tetrahydrofuran, pentane, hexane, heptane and octane.

9. The method according to claim 2 , wherein the molar ratio of the intermediate represented by Formula III to ROH is 1: (1 to 100).

10. The method according to claim 2 , wherein m is 1 and R is methyl or ethyl.

11. A propylene polymerization catalyst, wherein the propylene polymerization catalyst includes a solid titanium catalyst component, an alkyl aluminum compound component, and the arylaminosilane compound component according to claim 1 .

12. The propylene polymerization catalyst according to claim 11 , wherein the ratio of the components in the propylene polymerization catalyst is 1: (5 to 1000): (1 to 500) in terms of the molar ratio of titanium: aluminum: silicon.

13. The propylene polymerization catalyst according to claim 11 , wherein the alkyl aluminum compound is trimethylaluminum, triethylaluminum, triisobutylaluminum, trioctylaluminum, diethylaluminum hydride, diisobutylaluminum hydride, chlorodiethylaluminum, chlorodiisobutylaluminum or dichloroethylaluminum;
the solid titanium catalyst is a solid titanium catalyst with titanium, magnesium, and halogen as main components;
the solid titanium catalyst with titanium, magnesium, and halogen as the main components refers to magnesium halide, and a titanium compound having at least one Ti-halide bond and an internal electron donor compound supported thereon;
the internal electron donor compound is a polycarboxylic acid ester, an acid anhydride, a ketone, an ether, or a sulfonyl compound.

Assignees

• Petrochina Co Ltd

Inventors

• Yi Jianjun
• Cui Liang
• Zhang Xilai
• Lei Junyu
• Hao Haijun
• Zhao Shisheng
• Wang Kefeng
• Zhuang Junpeng
• Zhang Shenghui

Classifications

• C07F7/025 Primary

  without C-silicon linkages · CPC title

• C08F110/06

  Propene · CPC title

• C07F7/1888

  by reactions involving the formation of other Si-linkages, e.g. Si-N · CPC title

• C07F7/10 Primary

  containing nitrogen {having a Si-N linkage} · CPC title

• C08F10/06

  Propene · CPC title