New process of color stripping dyed textile fabric
AssigneeRoyce Chemical Company
InventorAndrew Fono
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Abstract
The specification describes an improved aqueous stripping liquid and process for stripping dyes from textile fabric which comprises treating fabric in a heated aqueous solution of sodium hydroxymethane sulfinate, ammonium cations and sulfite anions.
Claims15
A composition for stripping dye from textile fabric which comprises an aqueous solution of about 0.5% to 3.5% sodium hydroxymethane sulfinate, about 1% to 3.5% of a ammonium salt and about 1% to 3.5% of a sulfite salt maintained at a temperature of at least about 140.degree. F. and having a pH of from about 5 to 9.
A process for stripping dye from textile fabric which comprises preparing an aqueous stripping liquid containing about 1% to 3.5% of an ammonium salt about 1% to 3.5% of a sulfite salt and about 0.5% to 3.5% sodium hydroxymethane sulfinate heated to a temperature of at least about 140.degree. F. and adding the fabric to the heated liquid which is maintained at a temperature of about 140.degree. F. whereby the dye is stripped therefrom.
A process for stripping dye from textile fabric which comprises preparing an aqueous stripping liquid containing about 1% to 3.5% of an ammonium salt and about 1% to 3.5% of a sulfite salt, heating the liquid to a temperature of at least about 140.degree. F., adding about 0.5% to 3.5% sodium hydroxymethane sulfinate and adding the fabric to the heated liquid which is maintained at a temperature of about 140.degree. F. whereby the dye is stripped therefrom.
Dependencies are inferred from the claim text.