Apparatus for hydrogen conservation in hydrogen recycle processe

Details Apparatus for hydrogen conservation in hydrogen recycle processe Apparatus for hydrogen conservation in hydrogen recycle processe

1982-05-04

1984-10-09

Marcus, Michael S.

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Automatic analytical monitor and control of industrial process

208DIG1, 422112, 422234, 436 55, 436144, C01N 3300

Patent

active

044760949

ABSTRACT:
A control system is disclosed for modifying the flow of hydrogen recycle gas to a reaction apparatus which includes the admixture of a hydrocarbon charge stock with a recycle hydrogen-hydrocarbon stream and passage of the same to a hydrocarbon reaction zone to convert the hydrocarbons to a product effluent stream that is cooled to form a separated, via a separation zone, liquid product stream (withdrawn from the process) and a vaporous hydrogen-hydrocarbon stream, which is divided into the hydrogen-hydrocarbon recycle stream and a hydrogen-hydrocarbon vent stream. The recycle stream is returned to admixture with the hydrocarbon charge stock by a compressor while the vent stream conduit, in connection with the recycle conduit, has a controllable flow restriction device. The control system senses the hydrogen concentration in the reaction zone effluent stream and compares that value with a predetermined selected concentration to develop a signal that is transmitted to the flow restriction device in the vent conduit. In this manner, the amount of hydrocarbon-hydrogen in the recycle stream is controlled by increasing or decreasing the amount of vent gas discharged from the process and thereby the amount of hydrogen-hydrocarbon gas substracted from the recycle gas stream.

REFERENCES:
patent: 3497449 (1970-02-01), Urban
patent: 3607091 (1971-09-01), Boyd
patent: 3649202 (1972-03-01), Bajek et al.
patent: 3656911 (1972-04-01), Hobbs
patent: 3972804 (1976-08-01), McLaughlin et al.
patent: 3974064 (1976-08-01), Bajek et al.

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