Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acid esters
Reexamination Certificate
2005-07-05
2005-07-05
Tsang, Cecilia J. (Department: 1625)
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acid esters
C560S096000, C544S225000, C546S002000, C585S422000
Reexamination Certificate
active
06914154
ABSTRACT:
A production process, especially a continuous production process, for a biphenyltetracarboxylic acid tetraester characterized by carrying out, in parallel, a step of preliminarily mixing a phthalic acid diester and a palladium compound-containing catalyst to prepare a starting mixture, a step of continuously or intermittently supplying the starting mixture to a reactor, a step of conducting oxidative dimerization reaction of the phthalic acid diester in a temperature range of from 140° C. and lower than 250° C. while supplying molecular oxygen to the reactor to form a reaction mixture in the reactor, and a step of continuously or intermittently removing a portion of the reaction mixture from the reactor. Preferably, the palladium compound-containing catalyst in the starting mixture is dissolved in the phthalic acid diester, the palladium compound-containing catalyst comprises a palladium compound, a bidentate ligand and a copper compound, the reactor consists of a plurality of serially connected reactors and a carboxylic acid is also continuously or intermittently supplied to the reactor.
REFERENCES:
patent: 4581469 (1986-04-01), Itatani et al.
patent: 60-51150 (1985-03-01), None
patent: 61-106541 (1986-05-01), None
patent: 64-48 (1989-01-01), None
patent: 64-56649 (1989-03-01), None
patent: 2000-186063 (2000-07-01), None
Ataka Kikuo
Haruta Jun
Kakeya Noboru
Tsuji Tetsuro
Yamamoto Yasushi
DLA Piper Rudnick Gray Cary US LLP
Oh Taylor V.
Tsang Cecilia J.
Ube Industries Ltd.
LandOfFree
Process for production of biphenyltetracarboxylic acid... 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 production of biphenyltetracarboxylic acid..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for production of biphenyltetracarboxylic acid... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3382418