電解製糖に関する研究 (第5報)

工業化研究

抄録

Having succeeded in obtained glucose, xylose and fructose of high purity in good yields by the electrolytic process, its industrialization was planned and experiments on a semi-industrial scale were carried out. As a result, automatic, continuous neutralization of starch saccharified solution was successfully carried out thereby confirming the possibility of practical industrial application of this process for the manufacture of monosaccharides.
Points noted in the industrial application of this process were as follows:
1) In order to make automatic, continuous neutralization of acid saccharified solution, flow type electrolysis was used in a following manner:
a) In order to allow electric wiring so as to correspond to individual resistance of cells connected in series and placed on different levels, a suitable number of electrolytic cells lined in series is taken as one group and these groups are connected in parallel. By such combination of electrolysis in series and in parallel, capacity of each cell is approximately equalized.
b) A special electrolytic cell was designed so as to cope with excessive effervescence of saccharified solution (catholyte). However, in actual practice, the effervescence was not strong enough to necessitate the use of such special cells
2) Iron is almost quantitatively removed at the time of electrolytic deacidification.
3) It goes without saying that the electrolytic removal of SO₄^-- is completely quantitative.
4) The yield on sugars was 96-99% and the loss was very small.
As can be seen from these results, the experimental application on semi-industrial scale was more than equal to that of laboratory scale.