Inhibition of dioxane formation during recovery of glycols from

Details Inhibition of dioxane formation during recovery of glycols from Inhibition of dioxane formation during recovery of glycols from

1994-06-24

1995-02-28

Dees, Jose G.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

568868, 568871, C07C 6762

Patent

active

053939166

ABSTRACT:
There is described a process for avoiding dioxane formation during the depolymerization of polyester into glycol and ester components by passing superheated methanol through a reaction mixture containing polyester, oligomer and contaminants that are capable of forming sulfuric or halogen acids, the process comprising the step of adding sufficient base to neutralize any acid formed from the contaminants.

REFERENCES:
patent: 4163860 (1979-08-01), Delattre et al.
patent: 5045122 (1991-09-01), Tindall et al.
patent: 5051528 (1991-09-01), Naujokas et al.
patent: 5298530 (1994-03-01), Gamble et al.
patent: 5304673 (1994-04-01), Hermanson

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