Premium
Reclamation of Fibres from Rags
Author(s) -
Filson A.,
Speakman J. B.
Publication year - 1958
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.1478-4408.1958.tb02229.x
Subject(s) - hydrazine (antidepressant) , ethylene glycol , mixing (physics) , chemistry , ether , toluene , organic chemistry , glycerol , degradation (telecommunications) , chromatography , physics , quantum mechanics , telecommunications , computer science
The extent to which Terylene is attacked by 2% solutions of hydrazine in various alcohols at 100d̀c. is closely, but inversely, related to the heats of mixing of hydrazine and the alcohols. With glycerol and ethylene glycol the heat of mixing is high, and it hasbeen shown that ethylene glycol forms a well defined 1: 1 complex (m.p. 9.2d̀c.) with hydrazine. Dilute solutions of hydrazine in these solvents contain little free hydrazine, and it is not surprising, therefore, that they cause little degradation of Terylene in 40 min. at 100d̀c. Conversely, the most rapid destruction of Terylene is brought about by solutions of hydrazine in less reactive solvents, such as toluene and tsoamyl benzyl ether. Such solutions have the additional merit of discriminating sharply between wool and Terylene, thus allowing the former to be recovered from mixtures for re‐use.