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    • 5. 发明授权
    • Production of glyoxylic acid with glycolate oxidase and catalase
immobilized on oxirane acrylic beads
    • 用羟乙酸氧化酶和过氧化氢酶固定在环氧乙烷丙烯酸珠上生产乙醛酸
    • US5439813A
    • 1995-08-08
    • US253812
    • 1994-06-03
    • David L. AntonRobert DiCosimoJohn E. Gavagan
    • David L. AntonRobert DiCosimoJohn E. Gavagan
    • C12P7/40C12N9/04C12N9/08
    • C12P7/40
    • 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 acid is within the range of 1.0 to 3.0, a concentration of immobilized catalase of 50 to 100,00 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.degree. to 40.degree. C. preferably 5.degree. to 15.degree. C. Preferred insoluble immobilization supports are Eupergit C-250L and Eupergit C (Oxirane acrylic beads).
    • 在能够与乙醛酸形成化学加合物的胺缓冲剂存在下,在水溶液中使乙醇酸与氧反应生成乙醛酸的方法,以及固定或共固定在不溶性载体上的乙醇酸氧化酶和过氧化氢酶, 披露 该反应在pH为7至10,优选8至9.5,乙醇酸的初始浓度为200至2500mM,其中胺与乙醇酸的初始摩尔比在1.0的范围内的胺浓度进行 至3.0,固定化过氧化氢酶的浓度为50至100,00IU / mL,优选为350至14,000IU / mL,氧气压力高达50大气压,优选15个大气压,固定化的乙醇酸氧化酶浓度为约0.01至10IU / mL,优选约0.1〜4IU / mL,温度为0〜40℃,优选为5〜15℃。优选的不溶性固定载体为Eupergit C-250L和Eupergit C(Oxirane acrylic beads)。