..BE..DE..ESFRGB..IT....NL........................S0321304EUROPEAN PATENT APPLICATIONA319890830EP88311985.119881216enenen13499819871218US19890830198935198906211989254 4C 10G 45/68 AdeVerfahren zur Verbesserung der Schmierölausbeute in einer Wachsisomerisierung unter Verwendung niedriger BehandlungsgasgeschwindigkeitenenMethod of improving lube oil yield by wax isomerization employing low treat gas ratesfrMéthode d'augmentation du rendement en huile de lubrification par hydro-isomérisation de cires en appliquant une basse vitesse de gaz de traitementEXXON RESEARCH AND ENGINEERING COMPANY00200821US 134 998P.O.Box 390, 180 Park AvenueFlorham Park, New Jersey 07932-0390USBoucher, Heather Alexisw51-1500 Ventian BoulevardPoint Edward Ontario N7T 7W4CASomers, Harold Arnoldet al00036121ESSO Engineering (Europe) Ltd. Patents & Licences Mailpoint 72 Esso House Ermyn WayLeatherhead, Surrey KT22 8XEGBBEDEESFRGBITNL19890830198935

Increased yields of 5.6-5.9 cSt (5.6 to 5.9 Mm²/s)/100°C lube oil are obtained in wax isomerization processes by utilizing low treat gas rates during the wax isomerization step. The isomerate boiling in the lube oil range obtained by using low treat gas rates during isomerization possess lower dry wax content in addition to possessing a higher fraction of 5.6-5.9 cSt (5.6 to 5.9 Mm²/s)/100°C oil.