Unlock instant, AI-driven research and patent intelligence for your innovation.

A catalyst system for olefin polymerization and its application

A technology of olefin polymerization and catalyst, which is applied in the field of olefin polymerization catalysts, can solve the problems of few reports, performance degradation, catalyst activity, hydrogen modulation sensitivity and copolymerization performance parameters cannot be fully optimized, etc., to achieve increased bulk density and copolymerization unit content , improve the effect of activity

Active Publication Date: 2021-02-05
CHINA PETROLEUM & CHEM CORP +1
View PDF12 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] According to the records of the prior art, in the polymerization process of Ziegler-Natta type polypropylene catalyst, it is a well-known technology in this field to introduce an external electron donor to adjust the properties of the polymer; yet, in the polymerization process of Ziegler-Natta type polyethylene catalyst There are few reports on the introduction of external electron donors
Studies have shown that if an external electron donor is introduced in the polymerization process of Ziegler-Natta type polyethylene catalyst, the parameters such as catalyst activity, hydrogen modulation sensitivity and copolymerization performance cannot be fully optimized, and some performances will be reduced instead.
Due to the above reasons, Ziegler-Natta type polyethylene catalyst external electron donor technology is not yet industrialized, and reports in the prior art are less

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A catalyst system for olefin polymerization and its application
  • A catalyst system for olefin polymerization and its application
  • A catalyst system for olefin polymerization and its application

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0153] Under ice-bath conditions, 1,2-phthalic dimethyl ether (1.0 g) was added dropwise to a mixture of aqueous formaldehyde (4 mL / 38%) / 0.1 mL chloroform / concentrated hydrochloric acid (6 mL) to react, After 30 minutes, the solution became a paste and stirring was continued for 4 hours at room temperature. The solid was collected by filtration, washed with ice water, and thoroughly dried to obtain 0.5 g of compound A represented by formula (IV).

[0154]

preparation example 2

[0156] Dissolve 1,2-o-phenylenediethyl ether (3.3g) and paraformaldehyde (0.63g) in dry dichloromethane (30mL), stir under ice bath, and slowly drop into boron trifluoride ether (4.25g) , after the dropwise addition, remove the ice-water bath, stir at room temperature for 3 h, follow the reaction by TLC until the reaction is complete, stop the reaction, wash the mixture 3 times with water, separate the organic layer, spin dry the organic solvent to obtain an oil, add a small amount of acetone to dissolve the oil The substance was dissolved, and a large amount of methanol was added to it, and it was left standing in the refrigerator to precipitate a white solid. After suction filtration and thorough drying, 1.5 g of compound B represented by formula (V) was obtained.

[0157]

preparation example 3

[0159] Under ice-bath conditions, 3-methoxy-4-ethoxy-benzyl alcohol (3 g) was dissolved in 30 mL of methanol, and 15 mL of 65% perchloric acid was added dropwise under ice-bath and stirring. Under nitrogen protection, the mixture was stirred in an ice bath for 18 h. 30 mL of water was slowly added to the reaction product, followed by extraction of the organic phase with dichloromethane. The organic phase was carefully washed with aqueous sodium hydroxide solution, then with deionized water, and dried. The organic phase was thoroughly drained and purified by column chromatography to obtain 1 g of compound F represented by formula (VI).

[0160]

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the field of olefin polymerization catalysts, and specifically discloses a catalyst system for olefin polymerization and its application. The catalyst system comprises the reaction product of the following components: 1) solid catalyst component: comprising magnesium, titanium, halogen and optionally an internal electron donor compound; 2) cocatalyst: selected from organoaluminum compounds; 3) external electron donor Body compound: at least one selected from cyclotriveratrol and its derivatives shown in formula (I), M in formula (I) 1 , M 2 , M 3 , M 4 , M 5 and M 6 The same or different, each selected from hydrogen, hydroxyl, amino, aldehyde, carboxyl, acyl, halogen atom, ‑R 1 or-OR 2 , where R 1 and R 2 Each is a substituted or unsubstituted C 1 ~C 10 Hydrocarbyl, the substituent is selected from hydroxyl, amino, aldehyde, carboxyl, acyl, halogen, alkoxy or heteroatom.

Description

technical field [0001] The invention belongs to the field of olefin polymerization catalysts, in particular to a catalyst system for olefin polymerization and its application. Background technique [0002] In the past 60 years, with the continuous development of olefin polymerization catalyst technology, the activity, hydrogenation sensitivity and copolymerization performance of Ziegler-Natta polyolefin catalyst, as well as the bulk density, melt index, molecular weight distribution and fine powder content of its polymerization powder Parameters such as and copolymerization unit distribution have been significantly optimized. However, in order to better adapt to the needs of industrial production and produce products with better performance, the above-mentioned parameters of this type of catalyst and its polymerization powder need to be further improved. [0003] In the prior art, its hydrogen tuning sensitivity can be improved by introducing an internal electron donor into...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/00C08F110/02C08F210/16C08F210/08C08F4/649
CPCC08F10/00C08F110/02C08F210/16C08F4/6494C08F2500/12C08F2500/18C08F210/08
Inventor 黄庭孙竹芳郭子芳周俊领谢伦嘉苟清强杨红旭朱孝恒李秉毅黄廷杰
Owner CHINA PETROLEUM & CHEM CORP
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com