Method and apparatus for carbonylation with reduced catalyst...

Details Method and apparatus for carbonylation with reduced catalyst... Method and apparatus for carbonylation with reduced catalyst...

2011-03-08

2011-03-08

Sullivan, Daniel M (Department: 1621)

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

Organic compounds

Carboxylic acids and salts thereof

C562S517000

Reexamination Certificate

active

07902398

ABSTRACT:
An apparatus and method for carbonylating a reactant, including sequestering Group VIII catalyst metal from a process stream which generally has a ppb concentration of the catalyst metal. The process stream is treated with a polymer having nitrogen-containing heterocyclic repeat units to sequester the catalyst from the stream, thus allowing valuable catalyst to be recovered and returned to the reaction mixture. An apparatus provides a resin bed downstream of the light ends column in a carbonylation process. Preferably, spent resin is regenerated with a regenerant composition compatible with the carbonylation reaction mixture so that catalyst metal can be directly recycled and the resin re-used.

REFERENCES:
patent: 6657078 (2003-12-01), Scates et al.
patent: 2002/0151746 (2002-10-01), Scates et al.

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