Kinetics of the Cationization of Cotton

Cationic cotton has a greater affinity for reactive dyes than untreated cotton, providing economic and environmental advantages for the textile industry. The reaction by which a cationic group is appended to cotton suffers from a competing hydrolysis in the aqueous medium; the inefficiency of the ca...

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Bibliographic Details
Published in:	Industrial & engineering chemistry research Vol. 53; no. 23; pp. 9686 - 9694
Main Authors:	De Vries, Timothy S, Davies, Dan R, Miller, Michelle C, Cynecki, William A
Format:	Journal Article
Language:	English
Published:	American Chemical Society 11-06-2014
Subjects:	Catalysis Catalysts Cationic Cations Cotton Economics Hydrolysis Reaction kinetics Reactors
Online Access:	Get full text
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Summary:	Cationic cotton has a greater affinity for reactive dyes than untreated cotton, providing economic and environmental advantages for the textile industry. The reaction by which a cationic group is appended to cotton suffers from a competing hydrolysis in the aqueous medium; the inefficiency of the cationization under desired processing conditions currently limits widespread application. A study of the kinetics of the competing processes provided insight into the mechanism of hydrolysis and of the reaction with cotton, enabled by high-throughput parallel reactors. The reaction kinetics and the dependences on temperature and catalytic NaOH are well-defined under a range of industrially useful conditions. The temperature profiles of the competing reactions are similar, and both have the same first-order dependences on [NaOH]. Changing the amount of excess catalytic base and the temperature are therefore not expected to have a significant effect on reaction efficiency but can be used to control the time required for a reaction to go to completion. A rationale for the enhancement of reaction efficiency by organic cosolvents is also described.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0888-5885 1520-5045
DOI:	10.1021/ie500836n