Catalyst compositions comprising support materials having an improved particle-size distribution

a technology of support materials and catalysts, applied in the field of supporting catalysts, can solve the problems that polymer products, especially films, produced with a high gel concentration may have limited or no commercial valu

Inactive Publication Date: 2007-03-01
UNIVATION TECH LLC
View PDF34 Cites 58 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0006] An example of a process of the present invention is a process for producing a polyolefin composition comprising: contacting hydrogen and ethylene monomers with a supported multi-transition-metal catalyst composition to form a polyolefin composition; wherein the supported multi-transition-metal catalyst composition comprises: (a) at least two catalyst components selected from the group consisting of: a nonmetallocene catalyst component and a metallocene catalyst component; (b) a support material that has a D50 of less than about 30 microns and a particle size distribution having a D90/D10 ratio of less than about 6; and (c) an activator.
[0007] An example of a catalyst composition of the present invention is a supported multi-transition-metal catalyst composition comprising: (a) at least two catalyst components selected from the group consisting of: a nonmetallocene catalyst component and a metallocene catalyst component; (b) a support material that has a D50 of less than about 30 microns and a particle size distribution having a D90/D10 ratio of less than about 6; and (c) an activator.
[0008] An example of a polymer of the present invention is a polymer made from a process...

Problems solved by technology

Polymer products, especially films, that are produced with a high gel concentration may have ...

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
  • Catalyst compositions comprising support materials having an improved particle-size distribution
  • Catalyst compositions comprising support materials having an improved particle-size distribution

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0288] In the following example, three samples of supported, multitransition metal catalysts were prepared. Two samples are comparative samples, while one sample constitutes a supported, multitransition metal catalyst of the present invention. Specific properties of the samples are displayed in Table 1.

Preparation of Comparative Sample Catalyst 1.

[0289] A comparative sample catalyst (referred to herein as Comparative Sample Catalyst Composition No. 1) was prepared as follows. About 2,000 pounds of anhydrous iso-hexane was transferred into a nitrogen-purged, agitated and jacketed reaction vessel. The temperature of the jacket was set at 54° C.

[0290] A conventional silica was provided (Davison 955 silica), which typically has the following properties:

Average Particle Size:40micronsSurface Area:300m2 / gramPorosity:1.6cm3 / gramD10:10micronsD50:40micronsD90:90micronsD90 / D10:9.0

[0291] The conventional silica was dried under nitrogen at 875° C. About 750 pounds of the dehydrated conven...

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

PropertyMeasurementUnit
Densityaaaaaaaaaa
Volumeaaaaaaaaaa
Massaaaaaaaaaa
Login to view more

Abstract

A catalyst composition that includes a support material having an improved particle-size distribution is provided. Processes for producing polyolefin composition also are provided. Polymers and films also are provided. An example of a catalyst composition is a supported multi-transition-metal catalyst composition that includes: (a) at least two catalyst components selected from the group consisting of: a nonmetallocene catalyst component and a metallocene catalyst component; (b) a support material that has a D50 of less than about 30 microns and a particle size distribution having a D90/D10 ratio of less than about 6; and (c) an activator.

Description

FIELD OF INVENTION [0001] The present invention relates to catalysts for polyolefin production, and more particularly, to supported catalysts for use in making polyolefins that may be used in producing polymer products, wherein the supported catalyst comprises a support material having an improved particle-size distribution, and wherein, in a desirable embodiment, the supported catalyst is used to produce the polyolefin in a single reactor. BACKGROUND [0002] Advances in polymerization and catalysis have resulted in the ability to produce many new polymers having improved physical and chemical properties useful in a wide variety of superior products and applications. With the development of new catalysts, the choice of polymerization techniques (solution, slurry, high pressure or gas phase) for producing a particular polymer have been greatly expanded. Also, advances in polymerization technology have provided more efficient, highly productive and economically enhanced processes. [000...

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): C08F4/06
CPCC08F4/65912C08F4/65916C08F4/65925C08F210/16C08J5/18C08J2323/04C08F4/6546C08F4/65904C08F210/14C08F2500/17C08F2500/12C08F2500/05C08F2500/24C08F4/64C08F4/646C08F10/00
Inventor KUO, CHI-IKWALK, TAE HOONLI, DONGMINGSHANNON, PORTER CLARKE
Owner UNIVATION TECH LLC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap