Disclosed is a process that relates to the recovery of a metal catalyst
from an oxidizer purge stream produced in the synthesis of carboxylic
acid, typically terephthalic acid. The process involves the addition of a
wash solution to a high temperature molten dispersion to recover the
metal catalyst and then subjecting an aqueous mixture or purified aqueous
mixture so formed to a single stage extraction to remove organic
impurities to produce an extract stream and a raffinate stream comprising
the metal catalyst.