An object of the present invention is to provide an additive that can improve the production efficiency. The present invention is an additive for a bioethanol fermentation process comprising a polyoxyalkylene compound (A) having a Griffin's HLB value in the range of 0 to 6 and a polyoxyalkylene polyol (B). The compound (A) is preferably a mixture of a compound represented by a general formula (1) and a compound represented by a general formula (2). R1O-(AO)m-R2 (1). R3O-(AO)n-(EO)p-R4 (2). R1 and R3 represent alkyl or alkenyl, R2 and R4 represent a hydrogen atom or a monovalent organic group, AO represents oxyalkylene having a carbon number of 3 to 18, or a reaction residue of glycidol, an alkyl glycidyl ether or alkenyl glycidyl ether, EO represents oxyethylene, m and n are 1 to 100, and p is 3 to 10.
本发明的目的是提供一种可提高生产效率的添加剂。本发明是一种用于
生物乙醇发酵工艺的添加剂,由格里芬 HLB 值在 0 至 6 之间的聚氧亚烷基化合物(A)和聚氧亚烷基多元醇(B)组成。化合物(A)最好是通式(1)代表的化合物和通式(2)代表的化合物的混合物。R1O-(AO)m-R2 (1).R3O-(AO)n-(
EO)p-R4 (2)。R1 和 R3 代表烷基或烯基,R2 和 R4 代表氢原子或一价有机基团,AO 代表碳原子数为 3 至 18 的氧亚烷基,或
缩水甘油、烷基
缩水甘油醚或烯基
缩水甘油醚的反应残基,
EO 代表氧
乙烯,m 和 n 为 1 至 100,p 为 3 至 10。