Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Multimodal polyethylene obtained with multilayer chromium catalyst










Image Number 2 for United States Patent #7851400.

The present invention concerns a catalyst for the production of high density polyethylene, by homopolymerising ethylene or copolymerising ethylene and an alpha-olefinic comonomer comprising 3 to 10 carbon atoms, prepared by the steps of: a) selecting a silica support with a specific surface area larger than 300 m.sup.2/g; b) treating the silica support with a titanium compound, in order to introduce titanium into the support, or with an aluminium compound, in order to introduce aluminum into the support; c) either treating the titanated silica support with an aluminum compound, in order to introduce aluminum into the titanated silica support, or treating the aluminated silica support with a titanium compound, in order to introduce titanium into the aluminated silica support; d) depositing a chromium compound on the titanated and aluminated silica support to form a catalyst; e) activating the catalyst of step d) under air in a fluidised bed at a temperature of from 600 to 800.degree. C.








 
 
  Recently Added Patents
6-O-substituted benzoxazole and benzothiazole compounds and methods of inhibiting CSF-1R signaling
Multipoint photonic doppler velocimetry using optical lens elements
Device for preparing a body fluid for a bacteriological analysis
Semiconductor power amplifier
Transmitting apparatus and retransmitting method
Display apparatus, control method thereof, and program
HSP20 inhibits amyloidogenesis and neurotoxicity
  Randomly Featured Patents
Data processing method and apparatus
Bearing load indicator
Portable infant protective pad
Transmission mechanism for automobile vehicle
Methods and systems for creating, accessing, and communicating content
Contact lens having an optical zone having at least one focal point
Tape printing device capable of setting appropriate margin
Method for production of a copolyester resin film laminated metal sheet
Heat-inducible N-degron module
Image deflecting device