Chemistry: molecular biology and microbiology – Micro-organism – tissue cell culture or enzyme using process... – Preparing oxygen-containing organic compound
Reexamination Certificate
2011-05-10
2011-05-10
Desai, Anand U (Department: 1652)
Chemistry: molecular biology and microbiology
Micro-organism, tissue cell culture or enzyme using process...
Preparing oxygen-containing organic compound
C435S228000, C435S252300, C435S254200, C435S471000, C435S483000, C536S023200
Reexamination Certificate
active
07939303
ABSTRACT:
A process is provided for producing glycolic acid from formaldehyde and hydrogen cyanide. More specifically, heat-treated formaldehyde and hydrogen cyanide are reacted to produce glycolonitrile having low concentrations of impurities. The glycolonitrile is subsequently converted to an aqueous solution of ammonium glycolate using an enzyme catalyst having nitrilase activity derived fromAcidovorax facilis72W (ATCC 57746). Glycolic acid is recovered in the form of the acid or salt from the aqueous ammonium glycolate solution using a variety of methods described herein.
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DiCosimo Robert
Fallon Robert D.
Foo Thomas
Fox George C.
Gallagher F. Glenn
Chowdhury Iqbal H
Desai Anand U
E. I. Du Pont de Nemours and Company
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