Process for the manufacture of extremely pure monoethylene...

C - Chemistry – Metallurgy – 07 – C

Patent

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202/86, 260/635.

C07C 31/20 (2006.01) C07C 29/10 (2006.01) C07C 29/80 (2006.01) C07C 29/88 (2006.01)

Patent

CA 1157051

Abstract of the disclosure: Ethylene oxide and water are reacted in a reactor and the reaction product is subjected to distillation in a plurality of distillation columns, in the first columns water and components having a boiling point below that of monoethylene glycol and higher ethylene glycols, if any, being distilled off. To obtain extremely pure monoethylene glycol alkali metal compounds are added at a point between the reactor and the monoethylene glycol distillation column in an amount to adjust the pH of the product entering the latter column to a value of from 7 to 10. The mono- ethylene glycol obtained in this manner is especially pure and has very low UV absorption values. It is, therefore, especially suitable for the manufacture of polyester fibers.

368742

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