Method for recovering a liquid-phase oxidation catalyst for prep

Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

252416, 260524R, 423 50, 423140, 423144, B01J 3700, C07C 5142, C01G 4500, C01G 5106

Patent

active

039561755

ABSTRACT:
A method for recovering a heavy metal oxidation catalyst used in a liquid-phase oxidation process for producing terephthalic acid from the residue of the reaction mother liquor by stirring the residue together with water in the presence of molecular oxygen and a sulfur compound, subjecting the extracted mixture to a solid-liquid separation to separate the solid impurities, adding the aqueous solution containing the oxidation catalyst to an alkali metal or ammonium carbonate or an aqueous solution of an alkali metal or ammonium carbonate while maintaining the temperature of the system at about 26.degree.C to 70.degree.C, and recovering the heavy metal catalyst as a carbonate precipitate having high purity and good filterability and washability.

REFERENCES:
patent: 2964559 (1960-12-01), Burney
patent: 3033899 (1962-05-01), Knobloch et al.
patent: 3105851 (1963-10-01), Knobloch et al.
patent: 3341470 (1967-09-01), Hensley, Jr.
patent: 3673154 (1972-06-01), Trevillyah
patent: 3840641 (1974-10-01), Wampfler 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 recovering a liquid-phase oxidation catalyst for prep 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 recovering a liquid-phase oxidation catalyst for prep, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for recovering a liquid-phase oxidation catalyst for prep will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1301505

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