Process for the purifying working-up of reaction media and/or wa

Details Process for the purifying working-up of reaction media and/or wa Process for the purifying working-up of reaction media and/or wa

1992-12-03

1996-03-19

Mullis, Jeffrey

Liquid purification or separation

Processes

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

210758, 210759, 210760, 210702, 536 85, 536 91, C02F 144, C08B 1102, C08B 1104

Patent

active

055001246

ABSTRACT:
The invention relates to a process for the purifying working-up of liquid reaction media and/or wash media obtained during preparation of cellulose ethers, which are insoluble in hot water, from cellulose, an alkali metal hydroxide and at least one etherifying agent in a medium containing water and if appropriate at least one organic solvent, by ultrafiltration of the media into a permeate and concentrate, which comprises carrying out the ultrafiltration of the reaction media and/or wash media at a temperature at or above the flocculation temperature of the cellulose ethers.

REFERENCES:
patent: 3873518 (1975-03-01), Strange et al.
patent: 4155845 (1979-05-01), Ancelle et al.
patent: 4581446 (1986-04-01), Schulz
patent: 4672113 (1987-06-01), Wallisch et al.
patent: 4830753 (1989-05-01), Cabral et al.
patent: 4988807 (1991-01-01), Christensen et al.
patent: 5218107 (1993-06-01), Schulz
Klinkowski et al. "Ultrafiltration" in Encyclopedia of Polymer Science and Engineering pp. 75-105 (1989).
Donges, R., British Polymer J. 23:315-326 (1990).

Affiliated with

Also associated with

Rating

Process for the purifying working-up of reaction media and/or wa 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 purifying working-up of reaction media and/or wa, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the purifying working-up of reaction media and/or wa will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1957348