Bleaching and dyeing; fluid treatment and chemical modification – Cleaning or laundering – Dry cleaning
Patent
1977-12-21
1980-03-18
Castel, Benoit
Bleaching and dyeing; fluid treatment and chemical modification
Cleaning or laundering
Dry cleaning
210 60, 210167, 210203, D06L 110
Patent
active
041937651
ABSTRACT:
Residual moisture and sulfur and other residual reducing agent impurities contained in drycleaning solvents are removed by adding to the solvents an unsubstituted aromatic hydrocarbon or a halogen or alkyl substituted aromatic hydrocarbon and circulating the hydrocarbon-containing solvent through a filter system comprising two filters; one filter containing a solid acid and the other containing chromate compound.
REFERENCES:
patent: 1745108 (1930-01-01), McBerty
patent: 4026798 (1977-05-01), Castrantas et al.
patent: 4077878 (1978-03-01), Jackson
Gregory, T. C.; "Uses and Applications of Chemicals and Related Materials"; Reinhold Publishing Corp.; pp. 428, 429, (1966).
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