C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 51/48 (2006.01) C07C 51/47 (2006.01) C07C 63/26 (2006.01)
Patent
CA 2552336
The present invention relates to a process by which a dried carboxylic acid cake is obtained from a slurry or cake carboxylic acid product through the use of at least one counter current wash. More specifically, the present invention relates to a process by which a dried terephthalic acid cake suitable as a starting material for polyester or co~polyester production is obtained from a slurry or cake terephthalic acid product through the use of at least one counter current wash.
L'invention concerne un procédé d'obtention d'un gâteau d'acide carboxylique séché à partir d'un produit d'acide carboxylique sous forme de boue ou de gâteau par au moins un lavage à contre-courant. Plus particulièrement, l'invention concerne un procédé selon lequel un gâteau d'acide téréphtalique séché convenant comme matière première dans la production de polyester ou de copolyester est obtenu à partir d'un produit d'acide téréphtalique sous forme de boue ou de gâteau par au moins un lavage à contre-courant
Gibson Philip Edward
Lin Robert
Parker Kenny Randolph
Eastman Chemical Company
Gowling Lafleur Henderson Llp
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