Purification of terephthalic acid to relatively low levels of 4-

Details Purification of terephthalic acid to relatively low levels of 4- Purification of terephthalic acid to relatively low levels of 4-

1985-10-07

1986-12-16

Trousof, Natalie

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Inorganic carbon containing

562485, 562486, 562487, B01J 2344, B01J 2346, C07C 5142

Patent

active

046297154

ABSTRACT:
Aqueous solutions of crude terephthalic acid are purified to relatively low 4-carboxybenzaldehyde levels under hydrogenation conditions by using a layered catalyst bed. The aqueous terephthalic acid solution to be purified is first passed through a particulate primary catalyst layer constituted by palladium on active carbon and thereafter through a particulate secondary catalyst bed constituted by rhodium on active carbon.

REFERENCES:
patent: 3546285 (1970-12-01), Witt
patent: 3584039 (1971-06-01), Meyer
patent: 3639465 (1972-02-01), Olsen et al.
patent: 3726915 (1973-04-01), Pohlmann
patent: 4126638 (1978-11-01), Alagy et al.
patent: 4405809 (1983-09-01), Stech et al.

Affiliated with

Also associated with

Rating

Purification of terephthalic acid to relatively low levels of 4- does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Purification of terephthalic acid to relatively low levels of 4-, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Purification of terephthalic acid to relatively low levels of 4- will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-245205