公开(公告)号：US09969816B2

公开(公告)日：2018-05-15

申请号：US14913513

申请日：2014-09-02

Applicant: UPM-KYMMENE CORPORATION

Inventor： Markus Nuopponen ,  Timo Paakkonen ,  Raili Ponni ,  Tapani Vuorinen

IPC: C08B1/08 ,  C08B15/04 ,  D21C9/02 ,  C08B15/02 ,  D21C9/00 ,  D21H11/18

CPC classification number: C08B15/04 ,  C08B1/08 ,  C08B15/02 ,  D21C9/004 ,  D21C9/005 ,  D21C9/02 ,  D21H11/18

Abstract: A method for catalytic oxidation of cellulose using a heterocyclic nitroxyl radical as catalyst and main oxidant acting as oxygen source comprises, before the catalytic oxidation of the cellulose, pretreatment of the cellulose—in an alkaline pretreatment step, where the cellulose is treated in alkaline solution having hydroxide concentration of above 0.3 M, and—in a washing step, where the cellulose treated in the alkaline solution is washed to lower the pH.

公开(公告)号：US10604589B2

公开(公告)日：2020-03-31

申请号：US14650666

申请日：2013-12-13

Applicant: UPM-KYMMENE CORPORATION

Inventor： Taisto Tienvieri ,  Isko Kajanto ,  Tero Ojala ,  Sami Saarela ,  Markus Nuopponen ,  Timo Paakkonen ,  Tapani Vuorinen

IPC: C08B15/04 ,  D21C9/00

Abstract: Cellulose is oxidized catalytically using a heterocyclic nitroxyl radical as catalyst, main oxidant acting as oxygen source, and an activator of the heterocyclic nitroxyl radical. The oxidation is performed in a reaction medium which is at medium consistency of cellulosic pulp, which is above 6%, more preferably equal to or higher than 8%, and most preferably in the range of 8-12%. The reaction medium is mixed in a reactor through circulation of the reaction medium back to the reactor.

公开(公告)号：US20160201261A1

公开(公告)日：2016-07-14

申请号：US14913513

申请日：2014-09-02

Applicant: UPM-KYMMENE CORPORATION

Inventor： Markus Nuopponen ,  Timo Paakkonen ,  Raili Ponni ,  Tapani Vuorinen

IPC: D21C9/00 ,  D21C9/02 ,  C08B15/02

CPC classification number: C08B15/04 ,  C08B1/08 ,  C08B15/02 ,  D21C9/004 ,  D21C9/005 ,  D21C9/02 ,  D21H11/18

Abstract: A method for catalytic oxidation of cellulose using a heterocyclic nitroxyl radical as catalyst and main oxidant acting as oxygen source comprises, before the catalytic oxidation of the cellulose, pretreatment of the cellulose—in an alkaline pretreatment step, where the cellulose is treated in alkaline solution having hydroxide concentration of above 0.3 M, and—in a washing step, where the cellulose treated in the alkaline solution is washed to lower the pH.

Abstract translation: 使用杂环硝酰自由基作为催化剂和作为氧源的主要氧化剂的纤维素催化氧化的方法包括在纤维素的催化氧化之前，在碱性预处理步骤中预处理纤维素，其中纤维素在碱性溶液中处理 具有高于0.3M的氢氧化物浓度，并且在洗涤步骤中，洗涤在碱性溶液中处理的纤维素以降低pH。

公开(公告)号：US20150322171A1

公开(公告)日：2015-11-12

申请号：US14650666

申请日：2013-12-13

Applicant: UPM-KYMMENE CORPORATION

Inventor： Taisto Tienvieri ,  Isko Kajanto ,  Tero Ojala ,  Sami Saarela ,  Markus Nuopponen ,  Timo Paakkonen ,  Tapani Vuorinen

IPC: C08B15/04

CPC classification number: C08B15/04 ,  D21C9/00 ,  Y10T428/298

Abstract: Cellulose is oxidized catalytically using a heterocyclic nitroxyl radical as catalyst, main oxidant acting as oxygen source, and an activator of the heterocyclic nitroxyl radical. The oxidation is performed in a reaction medium which is at medium consistency of cellulosic pulp, which is above 6%, more preferably equal to or higher than 8%, and most preferably in the range of 8-12%. The reaction medium is mixed in a reactor through circulation of the reaction medium back to the reactor.

Abstract translation: 使用杂环硝酰基作为催化剂，作为氧源的主要氧化剂和杂环硝酰基的活化剂，氧化催化纤维素。 氧化在纤维素浆的中等稠度的反应介质中进行，其中6％以上，更优选等于或高于8％，最优选在8-12％的范围内。 将反应介质通过反应介质循环回到反应器中而在反应器中混合。