C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 51/43 (2006.01) C07C 51/47 (2006.01) C07C 51/487 (2006.01) C07C 67/08 (2006.01) C08G 63/78 (2006.01)
Patent
CA 2552337
The present invention relates to a process by which a carboxylic acid/diol mixture is obtained from a slurry or cake carboxylic acid product without isolation of a substantially dry carboxylic acid solid. More specifically, the present invention relates to a process by which a terephthalic acid/ethylene glycol mixture suitable as a starting material for polyester or co-polyester production is obtained from a slurry or cake terephthalic acid product without isolation of a substantially dry terephthalic acid solid.
L'invention concerne un procédé d'obtention d'un mélange acide carboxylique/diol à partir d'un produit d'acide carboxylique sous forme de boue ou de gâteau, sans isolation d'un solide d'acide carboxylique sensiblement sec. Plus particulièrement, l'invention concerne un procédé selon lequel un mélange acide téréphtalique/éthylèneglycol convenant comme matière première pour la production de polyester ou de copolyester est obtenu à partir d'un produit d'acide téréphtalique sous forme de boue ou de gâteau, sans isolation d'un solide d'acide téréphtalique sensiblement sec.
Gibson Philip Edward
Lin Robert
Parker Kenny Randolph
Eastman Chemical Company
Gowling Lafleur Henderson Llp
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