PROCESS FOR RECYCLING POLYETHYLENE TEREPHTHALATE USING SPECIFIC COLOUR COORDINATES FOR OLIGOMER PROCESSING

Abstract: one aspect is a method for producing a first intermediate product. a feedstock is provided that comprises a first polyester. the first polyester is contacted with a further organic compound in a volume section vto obtain a further initial mixture. a weight average molar mass of the first polyester is reduced in the volume section vto obtain a first intermediate mixture. the first intermediate mixture comprises a first intermediate product and, the further organic compound. a b value of the hunter lab colour coordinates of the first intermediate mixture is adjusted in a volume section v. the b value of the hunter lab colour coordinates of the first intermediate mixture is adjusted so that b≤0.

Inventor(s): Suresh L. MAKHIJA, Dhanvant YEOLA, Christian NEUMANN

CPC Classification: C08J11/24 (containing hydroxyl groups)

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