Recovery of silver from photographic films by high shear conditi

Details Recovery of silver from photographic films by high shear conditi Recovery of silver from photographic films by high shear conditi

1985-01-22

1986-09-16

Castel, Benoit

Cleaning and liquid contact with solids

Processes

Including regeneration, purification, recovery or separation...

134 251, 134 29, 75118P, 521 46, 521 465, 521 48, B08B 704

Patent

active

046120572

ABSTRACT:
A method for the recovery of silver from photographic film having a polyester base and a macromolecular organic polymer coating to which is adhered a light sensitive silver emulsion layer. The process includes mixing small film pieces in a hot aqueous liquid having a solids concentration level of at least 25 percent by volume. The mixture is subjected to conditions of high shear to remove the silver emulsion. The liquid containing the silver emulsion is then separated from the film pieces and the silver is recovered from the liquid.

REFERENCES:
patent: 3503904 (1970-03-01), Dietz et al.
patent: 3652466 (1972-03-01), Hittel et al.
patent: 3873314 (1975-03-01), Woo et al.
patent: 3928253 (1975-12-01), Thornton et al.
patent: 4078916 (1978-03-01), Gerber et al.
patent: 4150977 (1979-04-01), Phillips
patent: 4324705 (1982-04-01), Seto et al.

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