Resources Contact Us Home
Polymerization with titanium impregnated silica-chromium catalysts

Image Number 5 for United States Patent #4345055.

In accordance with a first embodiment of this invention, a silica xerogel is aqueously impregnated with a titanium compound which is resistant to hydrolysis. In accordance with a second embodiment of this invention, a silica hydrogel containing a titanium compound resistant to hydrolysis is dried. In this embodiment, the hydrogel preferably also contains a pore preserving agent. This invention makes possible the use of aqueous impregnation of titanium and conventional drying techniques to give a catalyst having characteristics associated with azeotrope dried silica-titanium coprecipitated catalyst. The catalysts of this invention are useful in olefin polymerization processes, particularly in the polymerization of predominantly ethylene monomer systems under slurry conditions.

  Recently Added Patents
Method and apparatus for monitoring wireless communication in hearing assistance systems
Data latch circuit and electronic device
Clostridium chauvoei polypeptide, DNA encoding the polypeptide and a vaccine comprising the polypeptide
Error protection for pipeline resources
Asynchronous distributed de-duplication for replicated content addressable storage clusters
Taxi cab key chain
Fluorescent proteins
  Randomly Featured Patents
Estimation of the average propagator from magnetic resonance data
Lifter for a toilet seat
Transamination process for Mannich products
Radio transmitting/receiving device
Apparatus for utilization of energy from fluids
Nicotine removal process
Impact dispersal device
Temperature control for spacecraft inertial control unit
Ink jet recording sheet and process for producing same
Pick pools system and method using packet-switched network