EP 4244261 A1 20230920 - A METHOD FOR PREPARING ESTERIFIED CELLULOSE AND/OR HEMICELLULOSE
Title (en)
A METHOD FOR PREPARING ESTERIFIED CELLULOSE AND/OR HEMICELLULOSE
Title (de)
VERFAHREN ZUR HERSTELLUNG VON VERESTERTER CELLULOSE UND/ODER HEMICELLULOSE
Title (fr)
PROCÉDÉ DE PRÉPARATION DE CELLULOSE ET/OU D'HÉMICELLULOSE ESTÉRIFIÉE(S)
Publication
Application
Priority
- FI 20206137 A 20201111
- FI 2021050762 W 20211110
Abstract (en)
[origin: WO2022101551A1] A method for preparing esterified cellulose and/or hemicellulose is disclosed. The method may comprise mixing an anhydride mixture and cellulose and/or hemicellulose, thereby obtaining an esterification mixture, such that the anhydride mixture esterifies the cellulose and/or hemicellulose at least partially, thereby forming the esterified cellulose and/or hemicellulose; and wherein the anhydride mixture is obtainable or obtained by reacting a fatty acid with a short-chain acid anhydride in the presence of an acid catalyst, such that an initial anhydride mixture is obtained, wherein the initial anhydride mixture comprises a mixed anhydride having a fatty acyl group and a short-chain acyl group, a portion of the short-chain acid anhydride, and a short-chain acid and optionally a fatty acid anhydride having two fatty acyl groups; and removing the short-chain acid, the short-chain acid anhydride and optionally water and/or impurities present in the initial anhydride mixture at least partially from the initial anhydride mixture, thereby obtaining the anhydride mixture.
IPC 8 full level
C08B 3/16 (2006.01); C08B 3/10 (2006.01); C08B 37/00 (2006.01); C08B 37/14 (2006.01); C08L 5/14 (2006.01)
CPC (source: EP FI)
C08B 3/16 (2013.01 - EP FI); C08B 3/20 (2013.01 - FI); C08B 37/0057 (2013.01 - EP); C08B 37/14 (2013.01 - FI); C08L 1/14 (2013.01 - EP); C08L 5/14 (2013.01 - EP); D21H 17/14 (2013.01 - FI)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
WO 2022101551 A1 20220519; EP 4244261 A1 20230920; FI 20206137 A1 20220512
DOCDB simple family (application)
FI 2021050762 W 20211110; EP 21810058 A 20211110; FI 20206137 A 20201111