Method for separating compounds in process streams

Details Method for separating compounds in process streams Method for separating compounds in process streams

1994-06-07

1995-08-08

Evans, Joseph E.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549542, 568872, 568920, C07D30132, C07D30304, C07C 2988, C07C 3120

Patent

active

054400589

ABSTRACT:
A method, especially applicable on a continuous basis to commercial process streams, for treating unwanted by-products and/or impurities contained in those streams. The method comprises the reaction in situ of such by-products or impurities with a reagent, preferably selected for its reactivity under ambient conditions of the process stream, to produce one or more materials which may then be separated from the process by economical means. The treated stream may be recycled to the process for further processing. While the method is not limited as to the process to which it is applied nor to the reagent or reagents used, in one convenient embodiment, formaldehyde in aqueous solution is reacted with an alkali metal sulfite or bisulfite to produce the corresponding salt, which may then be separated essentially completely by, e.g., distillation or membrane separation, etc., or its concentration in the process may be controlled by, e.g., continuous removal of a purge stream, etc.

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