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AssigneeThe B. F. Goodrich Company
InventorsJoseph A. Cowfer, Dane E. Jablonski, Ronald M. Kovach, Angelo J. Magistro
Estimating the term…
A method is disclosed 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 sticky 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.
In a process for the ammoxidation of a monoolefin having 3 or 4 carbon atoms, using a catalytic fluid-bed reactor in which ammonia, oxygen and said monoolefin are feed components, which reactor is provided with a pendulum viscometer with low rotational velocity which does not appreciably disturb the state of said fluid-bed in the immediate vicinity of said viscometer, and means to provide said pendulum with a preselected initial angular displacement, a method for obtaining desired operation of said reactor comprising,
In a process for the oxyhydrochlorination of a monoolefin having from 2 to about 4 carbon atoms, using a catalytic fluid-bed reactor in which hydrochloric acid, oxygen and said monoolefin are feed components, which reactor is provided with a pendulum viscometer with low rotational velocity which does not appreciably disturb the state of said fluid-bed in the immediate vicinity of said viscometer, and means to provide said pendulum with a preselected initial angular displacement, a method for obtaining desired operation of said reactor comprising,
In a process for the oxidation of a monoolefin having 3 or 4 carbon atoms, using a catalytic fluid-bed reactor in which oxygen and said monoolefin are feed components, which reactor is provided with a pendulum viscometer with low rotational velocity which does not appreciably disturb the state of said fluid-bed in the immediate vicinity of said viscometer, and means to provide said pendulum with a preselected initial angular displacement, a method for producing an unsaturated aldehyde while obtaining desired operation of said reactor comprising,
In a process for the oxyhydrochlorination of an alkane having from 1 to about 4 carbon atoms, using a catalytic fluid-bed reactor in which hydrochloric acid, oxygen and said alkane are feed components, whch reactor is provided with a pendulum viscometer with low rotational velocity which does not appreciably disturb the state of said fluid-bed in the immediate vicinity of said viscometer, and means to provide said pendulum with a preselected initial angular displacement, a method for obtaining desired operation of said reactor comprising,
Dependencies are inferred from the claim text.