Process for preparing methacrylic acid or methacrylic esters
    6.
    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。

    Process for the production of high internal phase emulsion foams
    7.
    发明授权
    Process for the production of high internal phase emulsion foams 有权
    生产高内相乳液泡沫的方法

    公开(公告)号:US09056412B2

    公开(公告)日:2015-06-16

    申请号:US12794993

    申请日:2010-06-07

    摘要: A method for reducing the adherence of a High Internal Phase Emulsion (HIPE) to belt surfaces in a multi-tiered curing oven is provided. The method comprises forming a High Internal Phase Emulsion from an oil phase comprising monomer, cross-linking agent, emulsifier, an aqueous phase and photoinitiator; depositing the High Internal Phase Emulsion on an extrusion belt; exposing the High Internal Phase Emulsion to an Ultraviolet light source to partially polymerize the top surface of the High Internal Phase Emulsion; moving the High Internal Phase Emulsion to a multi-tiered curing oven such that the partially polymerized top surface of the High Internal Phase Emulsion is contacted with a curing oven belt in the multi-tiered curing oven; and polymerizing the monomer component in the oil phase of the High Internal Phase Emulsion at a temperature of from about 20° C. to about 150° C. for a time sufficient to from a High Internal Phase Emulsion foam.

    摘要翻译: 提供了一种在多层固化炉中降低高内相乳液(HIPE)对带表面的粘附性的方法。 该方法包括从包含单体,交联剂,乳化剂,水相和光引发剂的油相形成高内相乳液; 将高内相乳液沉积在挤出带上; 将高内相乳液暴露于紫外光源以部分聚合高内相乳液的顶表面; 将高内相乳液移动到多层固化炉中,使得高内相乳液的部分聚合的顶表面与多层固化炉中的固化炉带接触; 并将高内相乳液的油相中的单体组分在约20℃至约150℃的温度下聚合足够长时间从高内相乳液泡沫中分离。