PROCESS AND APPARATUS FOR PRODUCING LIGNOPHENOL DERIVATIVE

摘要

A process in which a lignophenol derivative is efficiently yielded/recovered from a lignocellulosic substance through a treatment with a phenol derivative and an acid, and sugar recovery from the liquid acid/sugar mixture obtained simultaneously therewith and use of the sugar are facilitated. The process for preparing a lignophenol derivative and a liquid acid/sugar mixture is characterized by subjecting a liquid reaction mixture comprising a lignocellulosic substance, a phenol derivative, and an acid to solid-liquid separation to thereby separate the mixture into a lignophenol derivative as a solid phase and an acid/sugar mixture as a liquid phase and subjecting the lignophenol derivative separated to deacidification/cleaning.