Method for manufacture of high-purity phthalic anhydride

Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C07D30789

Patent

active

044369220

ABSTRACT:
A method for the manufacture of high-purity phthalic anhydride, which comprises exposing crude phthalic anhydride obtained by vapor-phase catalytic oxidation of ortho-xylene to contact with a gas containing molecular oxygen at an elevated temperature in the presence of an alkali metal salt of at least one carboxylic acid selected from the group consisting of maleic acid, succinic acid and benzoic acid, and optionally a manganese-containing alloy, and subsequently subjecting the resultant reaction mixture to distillation.

REFERENCES:
patent: 3201423 (1965-08-01), Landau et al.
patent: 4165324 (1979-08-01), Schroeder et al.
patent: 4234494 (1980-11-01), Schroeder et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Method for manufacture of high-purity phthalic anhydride does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for manufacture of high-purity phthalic anhydride, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for manufacture of high-purity phthalic anhydride will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-492956

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.