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Proceedings
Author(s) -
Klein Rudolf
Publication year - 1982
Publication title -
journal of the society of dyers and colourists
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 49
eISSN - 1478-4408
pISSN - 0037-9859
DOI - 10.1111/j.1478-4408.1982.tb03624.x
Subject(s) - oxidizing agent , chemistry , effluent , hydrogen peroxide , dyeing , polyester , precipitation , sodium dithionite , pulp and paper industry , inorganic chemistry , waste management , organic chemistry , physics , meteorology , engineering
Sulphur dyes are the preferred dyes for dyeing corduroy, work wear and polyester‐cellulosic fibre blend fabrics. The most important process variables are described briefly. Effluent problems arise when using sulphides as reducing agents and when oxidizing with dichromate. Instead of sulphide it is possible to use sodium hydrosulphite (sodium dithionite), mercaptoethanol, or glucose. On the other hand, sulphides can be eliminated very easily from the effluent by aeration or precipitation. Dichromate can be replaced by several products. The continuous determination of hydrogen peroxide, and the possibility of combining oxidizing and alkyla‐tion treatments are considered.