1 0 0 0 OA 結晶ブドウ糖の工業的生産に関する研究 (I) : 2番蜜の再糖化工程の検討
In order to obtain a high yield of crystalline dextrose, second hydrol (the mother liquor from the second crystallization stage) was reconverted from which an additional crop of crystalline dextrose was obtained. Conditions for reconversion were established on the basis of the experimental results in small scale laboratory autoclaves. Later, a 150 l autoclave and a commericial batch converter as well as a continuous conveter were used for pilot plant trials. The optimum conditions for reconversion with batch converter were found to be acid (oxalic) concentration 0.04N, hydrol concentration Be10°, pressure 2kg/cm^2 and reaction time 20 minutes. With these conditions, second hrdrol having a DE (dextrose equivalent) of 73 and a DX (dextrose content based on dry substances) of 55 per cent was reconverted to a DE of 83 and a DX of 76 per cent, while the same hydrol was reconverted with continuous converter to a DE of 85 and a DX of 79 per cent. Yields of crystalline dextrose from reconverted liquors with batch and continuous converters were 27 per cent and 42 per cent (based on hydrol dry substances) respectively.