Efficient preparation of high-purity cellulose from moso bamboo by p-toluenesulfonic acid pretreatment

This work proposed a promising biorefinery method for the deconstruction of moso bamboo by using p-toluenesulfonic acid (P-TsOH) pretreatment to product high-purity cellulose (dissolving pulp). The cellulose pulp with high & alpha;-cellulose content (82.36 %) was successfully prepared for 60 min at low pretreatment temperature (90 degrees C) and atmospheric pressure. After the simple bleaching and cold caustic extraction (CCE) processes, the properties of cellulose pulp, such as & alpha;-cellulose content, polymerization, ISO brightness, all met the standard of dissolving pulp. In general, the cooking method through P-TsOH pretreatment can shorten the preparation time, which can effectively reduce energy consumption and chemical consumption. Therefore, this work may provide a new perspective for the green preparation of dissolving pulp that can be used to produce lyocell fiber after ash and metal ion treatment.

Automated summary

This study proposed a promising biorefinery method using P-TsOH pretreatment to produce high-purity cellulose from moso bamboo. The cellulose pulp obtained had high α-cellulose content (82.36%) after a short pretreatment time at low temperature. The properties of the cellulose pulp met the standard of dissolving pulp after bleaching and cold caustic extraction processes, and the cooking method significantly reduced energy and chemical consumption.