Cleaning and liquid contact with solids – Processes – For metallic – siliceous – or calcareous basework – including...
Patent
1978-05-24
1981-01-27
Caroff, Marc L.
Cleaning and liquid contact with solids
Processes
For metallic, siliceous, or calcareous basework, including...
134 29, 134 30, 134 38, 252105, B08B 308
Patent
active
042473420
ABSTRACT:
Ethylene glycol terephthalate oligomer deposits and dyestuff residue are removed from textile dyeing equipment by contacting the deposits and residue with an aqueous composition at a temperature of from about 90.degree. C. to about 140.degree. C.; the aqueous composition consisting essentially of water, an effective amount of a base component to provide the aqueous admixture with a pH of at least about 11.5, an effective minor amount of a phase transfer agent sufficient to catalytically hydrolyze the oligomer deposits present within the textile dyeing machinery, and an effective minor amount of a cationic or nonionic surfactant to solubilize the dyestuff residue present in the textile dyeing machinery. The composition can further include an effective minor amount of a reducing agent to substantially discolor the solubilized dyestuff.
REFERENCES:
patent: 3485670 (1969-12-01), Fisher
patent: 3553143 (1971-01-01), Bauer
patent: 3761429 (1973-09-01), Yamano et al.
patent: 3865628 (1975-02-01), Callahan et al.
Caroff Marc L.
Milliken Research Corporation
Moyer Terry T.
Petry H. William
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