C - Chemistry – Metallurgy – 12 – P
Patent
C - Chemistry, Metallurgy
12
P
C12P 7/40 (2006.01)
Patent
CA 2144637
A process for the production of glyoxylic acid by reacting glycolic acid with oxygen in an aqueous solution in the presence of an amine buffer capable of forming a chemical adduct with glyoxylic acid, and glycolate oxidase and catalase immobilized or co-immobilized on an insoluble support is disclosed. The reaction is carried out at a pH of 7 to 10, preferably 8 to 9.5, an initial concentration of glycolic acid of 200 to 2500 mM, a concentration of amine wherein the initial mole ratio of amine to glycolic ac- id is within the range of 1.0 to 3.0, a concentation of immobilized catalase of 50 to 100,000 IU/mL, preferably 350 to 14,000 IU/ mL, an oxygen pressure of up to 50 atmospheres, preferably 15 atmospheres, an immobilized glycolate oxidase concentration of about 0.01 to 10 IU/mL, preferably about 0.1 to 4 IU/mL, and a temperature of 0 °C to 40 °C preferably 5 °C to 15 °C. Pre- ferred insoluble immobilization supports are Eupergit C-250L and Eupergit C (Oxirane acrylic beads).
Anton David Leroy
Dicosimo Robert
Gavagan John Edward
E.i. Du Pont de Nemours And Company
Sim & Mcburney
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