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公开(公告)号:US20180209089A1
公开(公告)日:2018-07-26
申请号:US15928136
申请日:2018-03-22
发明人: David Hinks , Guan Wang , Xiuzhu Fei , Harold Freeman
CPC分类号: D06L4/30 , D06L4/70 , D06P1/621 , D06P1/65112 , D06P5/134
摘要: The disclosure relates to a method for decolorization of a dye-colored synthetic polymer, which includes the steps of treating a dye-colored synthetic polymer, such as polyester, with a treatment composition at pH 6 or less, the treatment composition comprising sodium formaldehyde sulfoxylate, water, and a ketone. The resulting decolorized synthetic polymer is then separated from the treatment composition.