Continuous production method for decomposition product from water-insoluble macromolecular compound

摘要

The objective of the present invention is to solubilize and reduce the molecular weight of water-insoluble macromolecular compounds such as water-insoluble proteins and water-insoluble polysaccharides, via a simple operation and efficiently, to produce a novel functional material. The present invention provides a production method for a decomposition product from a water-insoluble macromolecular compound, containing the following steps: the step of bringing a solid acid catalyst into contact with the water-insoluble macromolecular compound, heating, and then recovering the supernatant solution; the step of adding an aqueous medium to the solid acid catalyst after the supernatant solution recovery, stirring, heating, and then further retrieving a supernatant solution; the step of washing the solid acid catalyst with the aqueous medium and recovering the washing solution; the step of pooling the recovered supernatant solutions and the washing solution to obtain a fraction that did not adsorb to the solid acid catalyst; and the step of eluting from the solid acid catalyst a component that adsorbed thereto, and recovering the elution solution to obtain the fraction that was adsorbed to the solid acid catalyst.