Dye recycling methods
AssigneeImperial College Innovations Limited
InventorsAida Rafat Abouelela, Jason Patrick Hallett, Anton Edward Josef Firth, Oliver Douglas Levers
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Abstract
A method for recycling dye from a dyed textile, the method comprising providing a textile coloured with a dye; adding the textile to a bath comprising a solution of ionic liquid, thereby causing the dye to strip from the textile and to disperse within said solution.
Claims48
A method for recycling dye from a dyed textile, the method comprising the following steps:
- providing a textile coloured with a dye;
- adding the textile to a bath comprising a solution of ionic liquid, thereby causing the dye to strip from the textile and to disperse within said solution.
A method for recycling dye from a dyed textile, the method comprising the following steps:
- providing a textile coloured with a dye, said dye being a disperse dye;
- adding the textile to a bath comprising a solution of ionic liquid, thereby causing the dye to strip from the textile and to disperse within said solution, wherein said solution of ionic liquid is an aqueous solution of protic liquid.
A method for recycling dye from a dyed textile, the method comprising the following steps:
- providing a textile coloured with disperse dye;
- adding the textile to a bath comprising an aqueous solution of protic ionic liquid, thereby causing the dye to strip from the textile and to disperse within the aqueous solution;
- removing the stripped textile from the bath;
- and
- adding a textile to be dyed to the bath comprising the aqueous solution comprising protic ionic liquid and dispersed dye, thereby exposing the textile to the dye and dyeing the textile.
A method for recycling dye from a dyed textile, the method comprising the following steps:
- providing a natural textile material comprising cellulose coloured with a dye;
- adding the textile to a bath comprising a solution of ionic liquid;
- and
- heating the bath, thereby causing the cellulosic material to break down.
Dependencies are inferred from the claim text.