C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 69/82 (2006.01) C07C 29/82 (2006.01) C07C 31/20 (2006.01) C07C 41/42 (2006.01) C07C 43/11 (2006.01) C07C 67/54 (2006.01)
Patent
CA 2182085
Separation of ethylene glycol and diethylene glycol from dimethyl terephthalate is accomplished by distillation using methyl benzoate or the methyl ester of p-toluic acid as an azeotropic agent.
La présente invention concerne la séparation de l'éthylène glycol et du diéthylène glycol à partir du diméthyle téréphtalate. Le procédé consiste en une distillation faisant intervenir le benzoate de méthyle ou l'ester de méthyle de l'acide p-toluique utilisé comme agent azéotropique.
Hepner Richard Redfearn
Michel Robert Everette
Trotter Robert Edward
Dimock Stratton Llp
Dupont Teijin Films U.s. Limited Partnership
E. I. Du Pont de Nemours And Company
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