Process and plant for recycling textiles
AssigneeSanko Tekstil Isletmeleri San. Ve Tic. A.S.
InventorsFatih KONUKOGLU, Kenan LOYAN, Agamirze HAMITBEYLI, Seref AGZIKARA, Gökhan KAPLAN, Gözde ÖKTEM, Hüseyin ÇINAR, Salih DOGANAY, Yavuz DEDE, Hazel UZ
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Abstract
A process of treatment of waste blend textiles comprising polyester fibers and cotton fibres depolymerizes polyester in a controlled environment to obtain treated textile comprising cotton staple fibers suitable to be recycled into cotton yarns.
Claims22
A process for recycling waste blend textiles (1) comprising polyester (4) and cellulosic staple fibres including cotton staple fibres (40), the process including a depolymerization of the polyester in a basic aqueous solution, comprising the following steps:
- a) providing an amount of said textiles in a reaction chamber (10);
- b) providing an amount of basic depolymerization solution (3) according to a bath ratio between ½ and 1/20 by weight of textile over weight of solution;
- c) circulating said amount of depolymerizing solution (3) through said textiles (1), to depolymerize said polyester (4) into corresponding monomers and to remove said polyester monomers from said textiles;
- d) removing said depolymerizing solution (3) from said reaction chamber (10), [;] wherein the temperature of said depolymerizing solution in step c) is in the range between 101° C. and 160° C.,
- and wherein e) the depolymerizing solution is circulated through said textiles to provide treated textiles (5) comprising said cellulosic staple fibres preferably including said cotton staple fibres (40), substantially free from polyester material.
A process for recycling waste textiles selected from garments and fabrics comprising polyester and cellulosic fibers including cotton fibres, wherein said garment or fabric comprises fabric portions sewn together by sewing yarns, said fabric portions consisting of cotton yarns and/or cellulosic yarns, said sewing yarns being polyester sewing yarns, the process including a depolymerization of the polyester sewing yarns in a basic aqueous solution, comprising the following steps:
- a) providing an amount of said textile in a reaction chamber;
- b) providing an amount of said basic depolymerization solution according to a bath ratio in the range of ½ and 1/20 by weight of textile over weight of solution;
- c) circulating said amount of basic depolymerizing solution through said textiles to depolymerize said polyester into corresponding monomers and to remove said polyester monomers from said textile;
- d) removing said basic depolymerizing solution from said reaction chamber;
- wherein a temperature of the basic depolymerizing solution in step c) is in the range between 101° C. and 160° C., and the textiles are in a still condition and the basic depolymerizing solution is circulated through said garments or fabrics to provide treated garments comprising cellulosic staple fibers including said cotton staple fibres, substantially free from polyester material.
Dependencies are inferred from the claim text.