Chemical apparatus and process disinfecting – deodorizing – preser – Analyzer – structured indicator – or manipulative laboratory... – Automatic analytical monitor and control of industrial process
Patent
1984-12-17
1989-05-23
Marcus, Michael S.
Chemical apparatus and process disinfecting, deodorizing, preser
Analyzer, structured indicator, or manipulative laboratory...
Automatic analytical monitor and control of industrial process
422109, 422111, 422134, 422233, 422193, B01J 400, B01J 812
Patent
active
048329150
ABSTRACT:
A system for recovering vapor, such as residual isobutane, from powder, such as polyethylene powder, comprises surge vessel and a two-compartment purge column. The polymer passes through the surge vessel by means of valves such as ball valves on the inlet and outlet of the surge vessel. Hot vapor, such as isobutane, is used to strip a large portion of the residual isobutane from the polyethylene in the top section of the purge column. Part of the isobutane leaving the column goes to a hydrocarbon recovery section and part is heated and recycled as the stripping medium. In the bottom section, nitrogen is used to strip the remaining isobutane from the polymer. An analyzer controller sensing nitrogen in the isobutane stream to recovery controls pressure in the bottom section by manipulating a valve in the nitrogen off-gas line form the bottom section to control the nitrogen content of the isobutane stream being recycled as stripping medium.
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Ayres Charles A.
Messura Kathleen A.
Marcus Michael S.
Phillips Petroleum Company
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