Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Binuclear metallocene supported catalyst, preparation method and applications thereof

A supported catalyst and metallocene compound technology, applied in the field of olefin polymerization, can solve the problems of low polymer isotacticity and insufficient catalyst activity, and achieve the effect of good catalytic activity

Active Publication Date: 2020-05-08
CHINA PETROLEUM & CHEM CORP +1
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problem of insufficient catalyst activity and low isotacticity of the obtained polymer during olefin polymerization, and to provide a dual-nuclear metallocene-supported catalyst and its preparation method, as well as its application in olefin polymerization , the active component of the supported catalyst is a metallocene compound with a dual-core structure, which can provide an olefin polymerization catalyst with better catalytic activity and produce polyolefin products with higher isotacticity

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
  • Binuclear metallocene supported catalyst, preparation method and applications thereof
  • Binuclear metallocene supported catalyst, preparation method and applications thereof
  • Binuclear metallocene supported catalyst, preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0119] Used to illustrate the preparation of compound A shown in formula (a).

[0120] With the compound shown in formula (7) as starting material,

[0121]

[0122] 24.55mL (0.20mol) of 2-bromotoluene in 40mL of tetrahydrofuran was slowly dropped into a three-necked flask containing 4.91g (0.20mol) of Mg powder and 10mL of tetrahydrofuran. The reaction system was gradually warmed up to reflux state and kept for 3h.

[0123] After the reaction was cooled to room temperature, a catalytic amount of NiCl was added 2 (about 0.1g), and a mixed solution of 21.06mL (0.20mol) of bromobenzene and 10mL of tetrahydrofuran was added dropwise, and the reaction was refluxed at 50-55°C for 3-5h.

[0124] After the THF was removed by rotary evaporation, the mixture was poured into 500 mL of ice water, and the pH value of the solution was adjusted to about 1 with 6M hydrochloric acid, and the organic matter was extracted with 3×60 mL of ether, MgSO 4 Dry, filter, and remove ether by rota...

preparation example 2

[0147] For illustrating the compound B shown in the preparation formula (b)

[0148] With the compound shown in formula (11) as starting material,

[0149]

[0150] Dissolve 1.86g (0.081mol) of Na in 50mL of absolute ethanol, add 14.60mL (0.081mol) of a mixture of diethyl methylmalonate and absolute ethanol dropwise, stir well, and slowly drop Add 20.00g (0.081mol) and 20 mL of absolute ethanol. A white precipitate was produced, and the mixture was heated to reflux at 100° C. for 3 h.

[0151] The product was cooled to room temperature, and aqueous KOH (16 g KOH dissolved in 45 mL water) was added, and the mixture was heated to reflux at 100° C. for 4 h. The solid gradually dissolves, and the solution is orange-red or brown-red.

[0152] After the reaction, the solvent ethanol was removed, water was added to dissolve the mixture completely and the pH was adjusted to 1 with 6M HCl, the yellow precipitate was filtered out and dried. The obtained solid was decarboxylated...

Embodiment 1

[0166] At 0°C, 4.41 mL (0.013 mol) of butyl lithium / hexane solution (2.86 mol / L), slowly rising to room temperature and reacting for 12 hours, a large amount of orange-red precipitated precipitation mother liquor was obtained.

[0167] The precipitated mother liquor was cooled to -25°C. Carefully add 2.39g (0.0126mol) of zirconium tetrachloride, stir the reaction, keep at -25°C for 0.5h, and slowly rise to room temperature for 24h.

[0168] Filter, wash the precipitate with 50 mL of toluene, and combine the filtrates. Part of the solvent was distilled off under reduced pressure, hexane was added dropwise until a precipitate occurred, and a very small amount of toluene was added to dissolve the precipitate. The solution was crystallized at -20°C, filtered to obtain orange-red crystals, and dried to obtain 3.97 g of Yield: 70%.

[0169] The product was determined by mass spectrometry. Determined as the binuclear metallocene compound shown in the above formula, denoted as ...

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 relates to the field of olefin polymerization, and discloses a binuclear metallocene supported catalyst, a preparation method and applications thereof. The supported catalyst comprises an active component, a cocatalyst and a carrier, wherein the active component is a binuclear metallocene compound and has a structure as represented by a formula (1), and the supported catalyst takingthe compound as the active component can effectively improve the catalytic activity and prepare a polyolefin product with improved isotacticity.

Description

technical field [0001] The invention relates to the field of olefin polymerization, in particular to a binuclear metallocene supported catalyst, a preparation method thereof, and an application thereof in olefin polymerization. Background technique [0002] Olefin polymers are important polymer materials with broad application prospects. Homopolymerization or copolymerization of olefin monomers, such as propylene, butene, etc., is an important reaction process to obtain olefin polymers, and the polymerization catalyst used in it is important for the catalytic activity of the reaction and the isotactic index of the obtained polymer influencing factors. Improving the activity of polymerization catalysts for the preparation of olefin polymers and the isotacticity of the obtained polymers have always been the focus of attention in the field of olefin polymerization. [0003] In the process of olefin polymerization, metallocene catalyst is an important research hotspot. Proces...

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
IPC IPC(8): C08F110/06C08F4/642C08F4/64C08F4/02
CPCC08F110/06C08F2500/15C08F4/6401C08F4/6423C08F4/025
Inventor 李化毅赵唤群胡友良张宇李倩杜建强蒋洁
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com