Recovery silver from photo sensitive materials

Details Recovery silver from photo sensitive materials Recovery silver from photo sensitive materials

1988-12-14

1991-12-10

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

C22B 1100

Patent

active

050714767

ABSTRACT:
A system for recovering silver from photographic film comprises a wash mixer adapted to hold the film and wash water comprising water, a proteolytic enzyme and a floculant. The mixer is adapted to rotate about its longitudinal axis and comprises spiral fins disposed at the inside surface thereof and a swivel joint coaxial with the axis of rotation.

REFERENCES:
patent: 3647422 (1972-03-01), Wainer
patent: 3748123 (1973-07-01), Bakker
patent: 3873314 (1975-03-01), Woo et al.
patent: 3982932 (1976-09-01), Korosi
patent: 4078916 (1978-03-01), Gerber et al.
patent: 4150977 (1979-04-01), Phillips
patent: 4293333 (1981-10-01), Drobot
patent: 4392889 (1983-07-01), Grout
patent: 4868120 (1989-09-01), Eguchi

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