Water resistant catalyst for the production of diaryl...

Details Water resistant catalyst for the production of diaryl... Water resistant catalyst for the production of diaryl...

2006-08-01

2006-08-01

Richter, Johann (Department: 1626)

Organic compounds -- part of the class 532-570 series

Organic compounds

Carbonate esters

Reexamination Certificate

active

07084291

ABSTRACT:
A method of increasing the amount of diphenylcarbonate produced per amount of catalyst consumed in a phenol carbonylation process is described. Phenolic carbonylation produces water as a reaction product which reduces the turnover number (TON) of the catalyst. A mixture of a phenolic precursor, a base containing catalyst and co-catalyst components and at least one chemical additive comprising a halide or hydroxide of alkali metal or alkaline earth metal when carbonylated together under specific conditions increases the turnover number (TON) and water resistivity of a palladium catalyst. The metal halide likely makes the catalyst less susceptible to degradation by water hence increasing the reaction yield per weight of catalyst consumed.

REFERENCES:
patent: 5380907 (1995-01-01), Mizukami et al.
patent: 5856554 (1999-01-01), Buysch et al.
patent: 6114564 (2000-09-01), Pressman et al.
patent: 6365538 (2002-04-01), Shalyaev et al.
patent: 6423863 (2002-07-01), Pressman
patent: 6548445 (2003-04-01), Buysch et al.
patent: 6566229 (2003-05-01), Spivack et al.
patent: 6566295 (2003-05-01), Shalyaev et al.
patent: 6852872 (2005-02-01), Reisinger et al.
Copending U.S. Appl. No. 09/822,531, filed Mar. 30, 2001, by Eric James Pressman et al., entitled “Method For Producing Aromatic Carbonates”.

Affiliated with

Also associated with

Rating

Water resistant catalyst for the production of diaryl... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Water resistant catalyst for the production of diaryl..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Water resistant catalyst for the production of diaryl... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3703234