Bleaching and dyeing; fluid treatment and chemical modification – Cleaning or laundering – Removing formation impurities from artifical fiber
Patent
1999-04-30
2000-08-15
Einsmann, Margaret
Bleaching and dyeing; fluid treatment and chemical modification
Cleaning or laundering
Removing formation impurities from artifical fiber
510278, 510281, 510282, 510283, 510284, D06L 122
Patent
active
061029726
ABSTRACT:
An improved method of removing rust stains from carpet and other textiles including application of ammonium bifluoride or other fluoride compounds to a rust stain. If the ammonium bifluoride is unable to remove the stain, an acidifying agent is added to the ammonium bifluoride to generate hydrofluoric acid on the stain. The unreacted hydrofluoric acid is then neutralized and removed along with the stain.
REFERENCES:
patent: 921850 (1909-05-01), Bishop
patent: 1369714 (1921-05-01), Gliott
patent: 2558013 (1951-06-01), Staubly
patent: 5215676 (1993-06-01), Stone
Einsmann Margaret
Harris Research Inc.
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