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    • 2. 发明公开
    • METHOD FOR POST-EXTRACTING LOW ACYL GELLAN GUM
    • 后萃取低酰基GELLAN胶的方法
    • EP2436699A1
    • 2012-04-04
    • EP10796646.7
    • 2010-06-02
    • Zhejiang Dsm Zhongken Biotechnology Co., Ltd
    • YANG, BaoyiWU, BinghuaXU, HuaiyuanZHU, ZhengxueSHEN, YubinWANG, XuegangYANG, LiqiangWANG, JialiangJIANG, WenhuiBAO, ShengqiangSHENG, XiaolinSHEN, Xiaoqin
    • C08B37/00C12P19/04C12S3/02
    • C12P19/04C08B37/006
    • The present invention relates to a post extraction process for preparing low acyl gellan, comprising the steps: deacylation treatment of gellan gum-containing fermentation broth, enzyme treatment, flocculation of low acyl gellan gum with divalent or polyvalent metal cations, clarification treatment of gellan gum solution, dehydration treatment of gellan gum solution, removal of divalent or polyvalent cations and decoloration, and drying and milling. Preferably, the process comprises the step of formulating a proper amount of chelating agent/acid system before the drying and milling step to chelate the added additional divalent cations added during the use of gellan gum, and at the same time to keep the pH value in a relatively stable condition. The present invention also provides the various low acyl gellan gums prepared by the above methods. The product has the following characteristics: a good appearance, a high trasmittancy, and high gel strength. In particular, the chromaticity ofthe product is above 83%, the transttency is above 85%, and the gel strength is above 400g/cm.
    • 本发明涉及制备低酰基结冷胶的后萃工艺,包括以下步骤:含结冷胶的发酵液的脱酰基化处理,酶处理,用二价或多价金属阳离子絮凝低酰基结冷胶,澄清处理结冷胶 溶液,结冷胶溶液的脱水处理,去除二价或多价阳离子和脱色,以及干燥和研磨。 优选地,该方法包括在干燥和研磨步骤之前配制适量的螯合剂/酸体系以螯合在使用结冷胶期间添加的添加的另外的二价阳离子的步骤,并且同时将pH值保持在 一个相对稳定的状况。 本发明还提供了通过上述方法制备的各种低酰基吉兰糖胶。 该产品具有以下特征:良好的外观,高传输性和高凝胶强度。 特别是产品色度在83%以上,变性度在85%以上,凝胶强度在400g / cm以上。