Process for preparing methacrylic acid or methacrylic esters
    9.
    发明授权
    Process for preparing methacrylic acid or methacrylic esters 有权
    制备甲基丙烯酸或甲基丙烯酸酯的方法

    公开(公告)号:US09234218B2

    公开(公告)日:2016-01-12

    申请号:US12602593

    申请日:2008-05-30

    摘要: The present invention relates to a process for the preparation of methacrylic acid or methacrylic esters, comprising the process steps of IA) preparation of 3-hydroxyisobutyric acid by a process comprising the process step of bringing a cell which has been genetically modified in comparison with its wild type in such a way that it is capable of forming more 3-hydroxyisobutyric acid, or polyhydroxyalkanoates based on 3-hydroxyisobutyric acid in comparison with its wild type, into contact with a nutrient medium comprising, as carbon source, carbohydrates, glycerol, carbon dioxide, methanol, L-valine or L-glutamate under conditions under which 3-hydroxyisobutyric acid or polyhydroxyalkanoates based on 3-hydroxyisobutyric acid are formed from the carbon source, if appropriate, isolation of the 3-hydroxyisobutyric acid from the nutrient medium and also, if appropriate, neutralization of the 3-hydroxyisobutyric acid, IB) dehydration of the 3-hydroxyisobutyric acid with formation of methacrylic acid and also, where appropriate, esterification methacrylic acid. The invention also relates to a process for the preparation of polymethacrylic acid or polymethacrylic esters.

    摘要翻译: 本发明涉及一种制备甲基丙烯酸或甲基丙烯酸酯的方法,其包括以下工艺步骤:IA)通过包括以下步骤的方法制备3-羟基异丁酸,所述方法包括将经遗传修饰的细胞与其 野生型,使得其能够形成更多的3-羟基异丁酸或与其野生型相比基于3-羟基异丁酸的聚羟基链烷酸酯与营养培养基接触,所述营养培养基包含作为碳源的碳水化合物,甘油,碳 二氧化物,甲醇,L-缬氨酸或L-谷氨酸盐,其中3-羟基异丁酸或基于3-羟基异丁酸的聚羟基链烷酸酯由碳源形成的条件下,如果合适,则从营养培养基中分离出3-羟基异丁酸, 如果适当,中和3-羟基异丁酸,IB)3-羟基异丁酸脱水形成甲基丙烯酸 酸,并且在适当的情况下酯化甲基丙烯酸。 本发明还涉及一种制备聚甲基丙烯酸或聚甲基丙烯酸酯的方法。