Process and apparatus for producing olefin polymers

Details Process and apparatus for producing olefin polymers Process and apparatus for producing olefin polymers

2006-10-03

2006-10-03

Teskin, Fred (Department: 1713)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymerizing in tubular or loop reactor

C526S065000, C525S052000, C525S053000

Reexamination Certificate

active

07115687

ABSTRACT:
The present invention concerns a process and an apparatus for continuous polymerisation of olefin monomers in a cascade of polymerisation reactors. According to the process, an olefin monomer is polymerised first in slurry phase in an inert hydrocarbon diluent in at least one loop reactor and then, subsequently, in gas phase in at least one gas phase reactor. According to the invention, a polymer slurry is continuously withdrawn from the loop reactor and optionally concentrated. The concentrated slurry is conducted to a high pressure flash unit in order to remove the remaining fluid phase, and fed to the gas phase reactor. With the process described in this invention, it is possible to produce bimodal polyethylene with good properties. The operation of the process is stable because of the truly continuous operation.

REFERENCES:
patent: 3816383 (1974-06-01), Stotko
patent: 4187278 (1980-02-01), Clifford
patent: 4395523 (1983-07-01), Kirch
patent: 4420592 (1983-12-01), Kato et al.
patent: 4740550 (1988-04-01), Foster
patent: 5326835 (1994-07-01), Ahvenainen et al.
patent: 5684097 (1997-11-01), Palmroos et al.
patent: 6455643 (2002-09-01), Harlin et al.
patent: 6586537 (2003-07-01), Marissal et al.
patent: 0 801 081 (1997-10-01), None
patent: 1 083 183 (2001-03-01), None
patent: 1 275 661 (2003-01-01), None
patent: WO-98/58977 (1998-12-01), None
patent: WO-00/42077 (2000-07-01), None

Affiliated with

Also associated with

Rating

Process and apparatus for producing olefin polymers does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process and apparatus for producing olefin polymers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process and apparatus for producing olefin polymers will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3703601