申请人:NITTO CHEMICAL INDUSTRY CO., LTD.
公开号:EP0711836A1
公开(公告)日:1996-05-15
A reaction system, wherein a cyanohydrin is converted into an optically active α-hydroxy acid or α-hydroxyamide via a treatment in a reaction tank (f) with a microorganism, is provided with an automatic cyanohydrin controller (h) comprising a cyano ion detector (a), a regulator (b) and a cyanohydrin supplier (i) and (j) linked thereto. The reaction is performed while automatically controlling the cyanohydrin concentration.
Thus cyanohydrin can be supplied under automatic control at a relatively low and constant concentration on the basis of its consumption ratio. The reaction rate of the catalyst can be continuously regarded as the rate-limiting factor. As a result, a decrease in the enzymatic activity during the reaction can be suppressed and an optically active α-hydroxy acid or α-hydroxyamide can be efficiently obtained at a high yield.
一种反应系统,通过在反应罐(f)中用微生物处理氰醇,将其转化为具有光学活性的 α-羟基酸或α-羟基酰胺,该系统配有氰醇自动控制器(h),该控制器由氰基离子检测器 (a)、调节器(b)以及与之相连的氰醇供应商(i)和(j)组成。反应在自动控制氰醇浓度的同时进行。
因此,氰醇可以在自动控制下,根据其消耗比,以相对较低且恒定的浓度供应。催化剂的反应速率可持续视为限速因素。因此,可抑制反应过程中酶活性的降低,并以高产率有效地获得具有光学活性的 α- 羟基酸或α- 羟基酰胺。