C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 51/48 (2006.01) C07C 51/43 (2006.01) C07C 51/47 (2006.01) C07C 51/487 (2006.01) C07C 63/26 (2006.01) C07C 67/03 (2006.01) C07C 67/08 (2006.01) C07C 69/82 (2006.01)
Patent
CA 2498621
In this invention, a process is provided by which a carboxylic acid/diol mixture suitable as starting material for a polyester production is obtained from a decolorized carboxylic acid solution without isolation of a substantially dry carboxylic acid solid. More specifically, in this invention, a process is provided by which a terephthalic acid/ethylene glycol mixture suitable as starting material for a polyester production is obtained from a decolorized terephthalic acid solution without isolation of a substantially dry terephthalic acid solid.
L'invention concerne un procédé consistant à obtenir, à partir d'une solution d'acide carboxylique décolorée, un mélange d'acide carboxylique et de diol pouvant servir de matériau de départ de production de polyester, sans isoler d'acide carboxylique sous forme solide sensiblement sec. Elle concerne, plus particulièrement, un procédé consistant à obtenir un mélange d'acide téréphtalique et d'éthylène glycol pouvant servir de matériau de départ pour la production de polyester, à partir d'une solution d'acide téréphtalique décolorée sans isoler l'acide téréphtalique solide pratiquement sec.
Lin Robert
Eastman Chemical Company
Gowling Lafleur Henderson Llp
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