poly(ethylene terephthalate) (PET) fiber waste into
useful products, such as hydrophobic disperse dyes for synthetic textiles. For this, PET fiber waste was
glycolytically depolymerized using excess of ethylene glycol in the presence of sodium sulfate as catalyst.
The product, pure bis(2-hydroxyethylene terephthalate) (BHET) was obtained with >60% yield by
successive recrystallization. In order to synthesize hydrophobic disperse dyes, applicable to synthetic
textile fibers, BHET was converted to bis(2-chloroethylene terephthalate), reacted with the p-nitro
benzoic acid, reduced and then reacted with bromine and potassium thiocyanate to get benzothiazole
derivative
poly(ethylene terephthalate) (PET) fiber waste intouseful products, such as hydrophobic disperse dyes for synthetic textiles. For this, PET fiber waste wasglycolytically depolymerized using excess of ethylene glycol in the presence of sodium sulfate as catalyst.The product, pure bis(2-hydroxyethylene terephthalate) (BHET) was obtained with >60% yield bysuccessive recrystallization. In order to synthesize hydrophobic disperse dyes, applicable to synthetictextile fibers, BHET was converted to bis(2-chloroethylene terephthalate), reacted with the p-nitrobenzoic acid, reduced and then reacted with bromine and potassium thiocyanate to get benzothiazolederivative
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