Process for the fractionation of polyoxyalkylene block copolymer

Details Process for the fractionation of polyoxyalkylene block copolymer Process for the fractionation of polyoxyalkylene block copolymer

1996-10-18

1998-09-01

Therkorn, Ernest G.

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210634, 568621, 568624, B01D 1104, C07C 3772

Patent

active

058007113

ABSTRACT:
A process for the fractionation of polyoxyalkylene block copolymers wherein the polydispersity of the polyether is reduced. The fractionation process, which removes lower molecular weight species such as polyoxyalkylene homopolymer, truncated polyoxyalkylene diblock polymers, or other reaction byproducts, comprises salt extraction and liquid phase separation to provide a product with a narrower molecular weight distribution, lower degree of unsaturation, and distinctly different physical characteristics compared to the starting material.

REFERENCES:
patent: 2674619 (1954-04-01), Lundsted
patent: 2677700 (1954-04-01), Jackson et al.
patent: 2979528 (1961-04-01), Lundsted
patent: 2980737 (1961-04-01), Geyer et al.
patent: 3036118 (1962-05-01), Jackson et al.
patent: 3478109 (1969-11-01), McConnell
patent: 3492358 (1970-01-01), Gurgiolo
patent: 3535307 (1970-10-01), Moss et al.
patent: 3639575 (1972-02-01), Schmolka
patent: 3740421 (1973-06-01), Schmolka
patent: 3829506 (1974-08-01), Schmolka
patent: 3867521 (1975-02-01), Miskel et al.
patent: 3867533 (1975-02-01), Schmolka
patent: 4076799 (1978-02-01), Willer et al.
patent: 4188373 (1980-02-01), Krezanoski
patent: 4322312 (1982-03-01), Boehmke
patent: 4439196 (1984-03-01), Higuchi
patent: 4447562 (1984-05-01), Ivani
patent: 4465663 (1984-08-01), Schmolka
patent: 4762951 (1988-08-01), Mueller
patent: 4859802 (1989-08-01), Thomas
patent: 4962238 (1990-10-01), Wolfe

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-266520