Method for catalytic oxidation of cellulose and method for making a cellulose product
申请人:UPM-Kymmene Corporation
公开号:US10767307B2
公开(公告)日:2020-09-08
A method for catalytic oxidation of cellulose using a heterocyclic nitroxyl radical as catalyst, main oxidant acting as oxygen source, and an activator of the heterocyclic nitroxyl radical, comprises—a preliminary activation step of the heterocyclic nitroxyl radical with hypochlorite to activated catalyst, and after the preliminary activation step, a cellulose oxidation step using the activated catalyst and hypochlorite as the main oxidant to oxidize cellulose. In the cellulose oxidation step, fibrous starting material is subjected to the oxidation to oxidize the cellulose, whereafter the oxidized fibrous raw material is disintegrated to nanofibrillar cellulose (NFC).
一种以杂环硝氧自由基为催化剂、主氧化剂为氧源、杂环硝氧自由基活化剂催化氧化纤维素的方法,包括杂环硝氧自由基与次氯酸盐的初步活化步骤,使之成为活化催化剂;初步活化步骤后,使用活化催化剂和次氯酸盐作为主氧化剂进行纤维素氧化步骤,使纤维素氧化。在纤维素氧化步骤中,纤维状起始原料被氧化,使纤维素氧化,然后被氧化的纤维状原料被分解成纳米纤维素(NFC)。