PROCESS FOR PRODUCING NONCRYSTALLINE CELLULOSE

摘要

A process with excellent productivity by which noncrystalline cellulose reduced in cellulose I type crystallinity can be efficiently obtained from a cellulose-containing raw material. The process is for producing noncrystalline cellulose from a cellulose-containing raw material having a cellulose I crystallinity calculated with the following formula exceeding 33%, wherein the cellulose-containing raw material has a bulk density of 100-500 kg/m³ and the residual components obtained by removing water from the raw material have a cellulose content of 20 mass% or higher. The process for noncrystalline-cellulose production comprises treating the cellulose-containing raw material with a medium type pulverizer to reduce the cellulose I crystallinity to 33% or lower. Cellulose I crystallinity (%) = [(I_22.6-I_18.5)/I_22.6] x 100 [I_22.6 represents the diffraction intensity for the lattice plane (002) in X-ray diffractometry, and I_18.5 represents the diffraction intensity for the amorphous part.]