申请人:A.E. STALEY MANUFACTURING
COMPANY
公开号:EP0035589A1
公开(公告)日:1981-09-16
The present invention is directed to a continuous process for producing hydrocarbyl aldosides, i.e., alkyl aldosides, 1 from carbohydrates and more particularly mixed alkyl glycosides from starch by direct alcoholysis. A carbohydrate, such as starch, is slurried in an alcohol and passed through a heated, confined zone under pressure and other particular conditions in the presence of an acid catalyst to form a mixed alkyl aldoside. According to a preferred embodiment, the converted carbohydrate/alcohol slurry is rapidly cooled after alcoholysis and before recovery of the alkyl aldoside or aldosides. According to another preferred embodiment at least one alkyl aldoside is separated from the resultant alkyl aldoside mixture and the resultant mother liquor is recycled to carbohydrate/alcohol feed slurry. When using starch as carbohydrate and methanol as alcohol, this embodiment optimizes methyl-alpha-D-ghucopyranoside production.
本发明涉及一种用碳水化合物,特别是用淀粉直接醇解生产烃基醛苷,即烷基醛苷1的连续工艺。碳水化合物(如淀粉)在醇中淤浆,在压力和其他特殊条件下,在酸催化剂的作用下通过加热的密闭区,形成混合烷基醛苷。根据一个优选的实施方案,转化后的碳水化合物/酒精浆液在醇解后和烷基醛苷或醛苷回收前被迅速冷却。根据另一个优选的实施方案,至少有一种烷基醛苷从得到的烷基醛苷混合物中分离出来,得到的母液再循环到碳水化合物/酒精饲料浆液中。当使用淀粉作为碳水化合物和甲醇作为酒精时,该实施方案可优化甲基-α-D-巨吡喃糖苷的生产。