Positive shut-off for catalyst feed system

Details Positive shut-off for catalyst feed system Positive shut-off for catalyst feed system

1976-01-26

1979-07-31

Serwin, R. E.

Chemistry: physical processes

Physical processes

Crystallization

13761411, 422111, 414292, G05D 700

Patent

active

041628942

ABSTRACT:
An apparatus and method for controlling catalyst feed to a reactor by automatically, concurrently opening and closing a double-check ball feed valve and a downstream positive shut-off valve in a catalyst feed system to a reactor.

REFERENCES:
patent: 2138356 (1938-11-01), Ryan et al.
patent: 2742511 (1956-04-01), Franzen
patent: 2885246 (1959-05-01), De Haven
patent: 3190509 (1965-06-01), Kirchhoefer
patent: 3232494 (1966-02-01), Poarch
patent: 3347741 (1967-10-01), Hutchison
patent: 3467905 (1969-09-01), Thornhill et al.
patent: 3525596 (1970-08-01), Grant, Jr.
patent: 3544280 (1970-12-01), Thomas

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