申请人:Amylum, n.v.
公开号:US05563303A1
公开(公告)日:1996-10-08
A method for producing xylitol from D-glucose, D-fructose, D-galactose or mixtures thereof, characterized in that it comprises the steps of: a. oxidation of the starting material to an intermediate that consists mainly of L-xylonic acid, D-arabinonic acid, D-lyxonic acid or a mixture of at least two of said acids, whereby said acids are free or in the form of their salts, lactones or O-formyl derivatives; b. treatment of said intermediate with a hydrogenation catalyst and hydrogen gas in one or several steps to a product consisting mainly of xylitol or a mixture of xylitol, arabinitol and ribitol; c. and, if necessary, separation of xylitol from said product and, if said product consist mainly of said mixture of pentitols, feeding of the fractions of arabinitol and ribitol back to the preceding reaction step b.
一种从D-葡萄糖、D-果糖、D-半乳糖或其混合物中生产木糖醇的方法,其特征在于包括以下步骤:a.将起始物氧化为主要由L-木糖酸、D-阿拉伯糖酸、D-吕克糖酸或至少两种酸的混合物组成的中间体,其中所述酸是自由的或以它们的盐、内酯或O-甲酰衍生物的形式存在;b.用氢化催化剂和氢气在一个或多个步骤中处理所述中间体,得到主要由木糖醇或木糖醇、阿拉伯糖醇和核糖醇的混合物组成的产物;c.如有必要,从所述产物中分离出木糖醇,并将阿拉伯糖醇和核糖醇的分数回馈到前述反应步骤b中。