Process for producing polyolefins

Details Process for producing polyolefins Process for producing polyolefins

2006-02-28

2006-02-28

Cheung, William K. (Department: 1713)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S064000, C526S084000, C526S090000, C526S348000, C526S352000

Reexamination Certificate

active

07005485

ABSTRACT:
A process is provided that produces polyolefins. The process comprises mixing a first stream, which comprises at least one catalyst deactivating agent, with a second stream, which comprises at least one polyolefin, at least one catalyst, at least one diluent, and at least one monomer, to produce a third stream, which comprises at least one polyolefin, at least one deactivated catalyst, at least one diluent, and at least one monomer. By utilizing the deactivating agent, polymerization can be slowed, or substantially stopped, when downstream equipment is being repaired or process control problems are being corrected. Later, polymerization can be restarted without the use of scavengers to remove poisons from the slurry polymerization reactor, and polyolefin production can be resumed.

REFERENCES:
patent: 3152872 (1964-10-01), Scoggin et al.
patent: 3817962 (1974-06-01), Smith et al.
patent: 3998995 (1976-12-01), Buss et al.
patent: 4121029 (1978-10-01), Irvin et al.
patent: 4151122 (1979-04-01), McDaniel et al.
patent: 4182810 (1980-01-01), Willcox
patent: 4276191 (1981-06-01), Karayannis et al.
patent: 4296001 (1981-10-01), Hawley
patent: 4345055 (1982-08-01), Hawley
patent: 4364842 (1982-12-01), McDaniel et al.
patent: 4402864 (1983-09-01), McDaniel
patent: 4424341 (1984-01-01), Hanson et al.
patent: 4501885 (1985-02-01), Sherk et al.
patent: 4613484 (1986-09-01), Ayres et al.
patent: 4958006 (1990-09-01), Bernier et al.
patent: 5183866 (1993-02-01), Hottovy
patent: 5200502 (1993-04-01), Kao et al.
patent: 5207929 (1993-05-01), Sung et al.
patent: 5237025 (1993-08-01), Benham et al.
patent: 5387659 (1995-02-01), Hottovy et al.
patent: 5442019 (1995-08-01), Agapiou et al.
patent: 5731381 (1998-03-01), Apecetche et al.

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3693446