Process for producing bimodal polyethylene resins

Details Process for producing bimodal polyethylene resins Process for producing bimodal polyethylene resins

2006-04-25

2006-04-25

Lu, Caixia (Department: 1713)

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

Synthetic resins

Polymerizing in two or more physically distinct zones

C526S064000, C526S160000, C526S124200, C526S348400, C526S348600

Reexamination Certificate

active

07034092

ABSTRACT:
A process for producing bimodal polyethylene resins in two reactors in series, the process comprising producing a first polyethylene resin fraction in a first slurry loop reactor in a diluent in the presence of a catalyst and producing a second polyethylene resin fraction in a second slurry loop reactor, serially connected to the first reactor, in the diluent in the presence of the catalyst, the first polyethylene resin fraction being passed from the first reactor to the second reactor together with the catalyst, one of the first and second reactors producing a resin fraction of higher molecular than the resin fraction produced by the other of the first and second reactors, characterised in that the first reactor is fed with a feed of ethylene and diluent having an ethylene content of at least 70 wt % based on the weight of the diluent and in that in the first reactor the slurry of polyethylene in the diluent has a solids content of at least 30 wt % based on the weight of the diluent.

REFERENCES:
patent: 5391654 (1995-02-01), Ahvenainen et al.
patent: 5639834 (1997-06-01), Debras et al.
patent: 5684097 (1997-11-01), Palmroos et al.
patent: 6063878 (2000-05-01), Debras et al.
patent: 6225421 (2001-05-01), Promel et al.
patent: 6355741 (2002-03-01), Marechal
patent: 2001/0014724 (2001-08-01), Promel et al.
patent: 2001/0018499 (2001-08-01), Marissal et al.
patent: 2001/0025088 (2001-09-01), Marissal
patent: 0580930 (1994-02-01), None

Affiliated with

Also associated with

Rating

Process for producing bimodal polyethylene resins 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 for producing bimodal polyethylene resins, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for producing bimodal polyethylene resins will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3621399