B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
B01D 53/44 (2006.01) B01D 53/30 (2006.01) B01D 53/86 (2006.01) C01B 21/04 (2006.01) C08G 63/90 (2006.01)
Patent
CA 2143099
Process for the purification of inert gases containing impurities of organic nature particularly of gas (nitrogen) coming from solid state polycondensation reactors of polyester resins including the gas treatment with the stoichiometric quantity (or slightly higher) of oxygen as regards the present impurities at a temperature between 250° and 600 °C by using Pt or Pt/Pd catalysts supported on a porous solid and the gas recycling directly to the polycondensation reactor before drying to eliminate the water produced during the reaction of impurities oxidation.
L'invention concerne un procédé de purification de gaz inertes contenant des impuretés de nature organique, notamment d'un gaz (l'azote) provenant de réacteurs de polycondensation à l'état solide de résines polyester. Ce procédé consiste à traiter le gaz avec une quantité stoïchiométrique (ou légèrement supérieure) d'oxygène pour ce qui est des impuretés présentes à une température comprise entre 250 DEG C et 600 DEG C en utilisant des catalyseurs Pt ou Pt/Pd supportés sur un solide poreux, et à recycler le gaz directement vers le réacteur de polycondensation avant le séchage afin d'éliminer l'eau obtenue lors de la réaction d'oxydation d'impuretés.
Boveri Giuseppina
Ghisolfi Guido
Giordano Dario
Macrae & Co.
Uop N.v.
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