Recycling of cellulosic textiles

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United States of America Patent

PATENT NO 11891725
APP PUB NO 20230250559A1
SERIAL NO

18114495

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A method for recycling textiles comprising cellulose with the following steps of: optionally disintegrating the textile, swelling the cellulose, under reducing conditions, wherein at least one reducing agent is present at least during a part of the swelling, and then performing at least one of the following two bleaching steps in any order: i) bleaching the material with oxygen at alkaline conditions with a pH in the range 9-13.5, and ii) bleaching the material with ozone at acid conditions below pH 6. An advantage is that the yield is improved at the same time as excellent decolourization is achieved. If the recycled material is used in viscose manufacture, the risk of clogging nozzles and so on is reduced.

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Patent Owner(s)

Patent OwnerAddress
CIRCULOSE AB103 23 STOCKHOLM

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Henriksson, Gunnar Solna, SE 10 99
Lindgren, Christofer Stockholm, SE 10 46
Lindström, Mikael Lidingö, SE 11 22

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