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Machine translation
1. (WO1980000699) USE OF PENDULUM VISCOMETER IN FLUID-BED REACTION
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1980/000699    International Application No.:    PCT/US1979/000734
Publication Date: 17.04.1980 International Filing Date: 12.09.1979
IPC:
B01J 8/24 (2006.01), C07C 17/156 (2006.01), G01N 11/16 (2006.01)
Applicants:
Inventors:
Priority Data:
949170 06.10.1978 US
Title (EN) USE OF PENDULUM VISCOMETER IN FLUID-BED REACTION
(FR) UTILISATION D"UN VISCOSIMETRE PENDULAIRE DANS UNE REACTION A LIT FLUIDE
Abstract: front page image
(EN)Method for using a pendulum viscometer having damped torsional oscillations, in a laboratory catalytic fluid-bed reactor, to monitor a propensity to stick which is exhibited by certain supported catalysts. A fluid-bed of such catalysts has been found to become suddenly more stikky just before a point at which a change in pressure drop across the fluid-bed can be measured due to a process "upset". At this point ("the inversion point"), the upset is usually irremediable. The method includes correlating data on catalyst stickiness from a laboratory reactor operating at atmospheric pressure, with an expected level of catalyst stickiness in a commercial reactor operating at elevated pressure. A pendulum viscometer and related auxiliary apparatus is disclosed for magnetically and electrically measuring and recording the rate at which the pendulum"s torsional oscillations are damped. Frequent measurements are made during normal operation of the fluid-bed to determine its stickiness (as evidenced by the rate at which the pendulum"s torsional oscillations are damped) relative to the stickiness at the inversion point. Operation of the fluid-bed under conditions for which measured rates of damping are predeterminedly lower than the rate near the inversion point, assures operation of the fluid-bed reactor at maximum efficiency.
(FR)Methode pour l"utilisation d"un viscosimetre pendulaire ayant des oscillations de torsion amorties, dans un reacteur catalytique de laboratoire a lit fluide, pour la mesure de la tendance au collage presentee par certains catalyseurs supportes. On a constate qu"un lit fluide de tels catalyseurs devenait soudainement plus collant juste avant un point auquel un changement de baisse de pression au travers du lit fluide peut etre mesure, en raison d"une "defaillance" du procede. A ce point (point d"inversion), la defaillance est generalement irremediable. Le procede comprend des donnees de correlation sur le collage d"un catalyseur depuis un reacteur de laboratoire travaillant a pression atmospherique avec un niveau attendu de collage dans un reacteur commercial travaillant a pression elevee. Un viscosimetre pendulaire et un appareillage auxiliaire y relatif est decrit pour la mesure et l"enregistrement electrique et magnetique du taux auquel les oscillations de torsion de pendule sont amorties. Des mesures frequentes sont faites pendant l"operation normale du lit fluide pour determiner son collage (ainsi qu"il est mis en evidence par le taux auquel les oscillation de torsion du pendule sont amorties) par rapport au collage au point d"inversion. Le fonctionnement du lit fluide dans des conditions pour lesquelles des taux d"amortissement mesures sont de maniere predeterminee plus bas que les taux pres du point d"inversion assurent un fonctionnement du reacteur a lit fluide a une efficacite maximale.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)