Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1984-10-09
1986-12-16
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250227, G01N 1506, G01N 1507
Patent
active
046299033
ABSTRACT:
A method for monitoring the feed of a catalyst, especially the feed of a catalyst employed in a gas-phase linear low density polyethylene process system through the intermediary of the electro-optical scanning of an intermittent flow of the catalyst. The invention also relates to an apparatus for monitoring the catalyst feed in a gas-phase linear low density polyethylene process for the implementing of the inventive monitoring method. An intermittent flow of the catalyst, which is generally opaque, is monitored through the utilization of fiber optics and a light source and light detector device, wherein light which is conducted through the fiber optics passes through a clear or transparent flow channel through which there is effected the catalyst flow, and is monitored through a suitable photocell. The catalyst particles will interrupt the light beam while traversing the transparent flow channel and allow this to be registered by the photocell on a suitable indicating instrument.
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Giacobbe Thomas J.
Leitman Richard H.
Terebecky Walter
Gilman Michael G.
McKillop Alexander J.
Mobil Oil Corporation
Nelms David C.
Oen William L.
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