Removal of iodine or ioidide impurities

Details Removal of iodine or ioidide impurities Removal of iodine or ioidide impurities

1992-02-06

1993-06-15

Manoharan, Virginia

Distillation: processes, separatory

With chemical reaction

Including step of adding catalyst or reacting material

203DIG6, 560248, 562608, B01D 334

Patent

active

RE0342815

ABSTRACT:
A process for removing iodine or soluble iodide impurities from a carboxylic acid or carboxylic acid anhydride, the carboxylic acid or carboxylic acid anhydride having been by a carbonylation process. The process includes: step (a) treating impure carboxylic acid or carboxylic acid anhydride containing iodine or soluble iodide impurities with an unsupported scavenger at a temperature of between 20.degree. and 250.degree. C. and step (b) thereafter separating the treated carboxylic acid or carboxylic acid anhydride from the scavenger. The scavenger is a silver salt in the absence of a trialkyl phosphine, a triaryl phosphine and a heterocyclic aromatic nitrogen compound. The preferred scavenger for acetic acid and acetic anhydride is silver acetate.

REFERENCES:
patent: 3658467 (1972-04-01), Maeck
patent: 3772156 (1973-11-01), Johnson et al.
patent: 4615806 (1986-10-01), Hilton
patent: 4664753 (1987-05-01), Erpenbach et al.

Affiliated with

Also associated with

Rating

Removal of iodine or ioidide impurities does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Removal of iodine or ioidide impurities, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Removal of iodine or ioidide impurities will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1034820