The carboxymethylation of original and activated cellulose in the system cellulose/NaOH/isopropyl alcohol/ CH,ClCOOH has been investigated by means of conductometry, viscosimetry and X-ray diffractometry. It has been found that the carboxymethylation process in this system is a pseudo-first-order reaction with two stages having different first-ordcr rate constants. By application of the activation method the rate of etherification and the utilization ratio of the etherifying agent were increased and the quality of the product was improved.
Kinetik der Carboxymethylierung yon Cellulose i n IsopropylalkoholDie Carboxymethylierung von unbehandelter und aktivierter Cellulose in dem System Cellulose/NaOH/Isopropylalkohol/CH,ClCOOH wurde mittels Konduktometrie, Viskosimetrie und Rontgenbeugung untersucht. Es wurde festgestellt, daB der Carboxymethylierungsprozefi in diesem System eine Reaktion von pseudo-erster Ordnung ist und in zwei Stufen mit unterschiedlichen Geschwindigkeitskonstanten ablauft. Nach einer speziellen Aktivierung der Proben nehmen die Geschwindigkeit der Veretherung und die Ausnutzung des Veretherungsmittels zu, und die Qualitat des Produktes wird verbessert.
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