Method and apparatus for detoxification of cyanide contaminated

Details Method and apparatus for detoxification of cyanide contaminated Method and apparatus for detoxification of cyanide contaminated

1984-12-12

1986-05-20

Michl, Paul R.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Treating polymer containing material or treating a solid...

528483, 528489, 528490, C08F 628

Patent

active

045902615

ABSTRACT:
The present invention is directed to a method and apparatus for the detoxification of polymeric film chip materials which have been contaminated with cyanide compounds during the process for the reclamation of their silver content. The present invention includes the steps of providing within a substantially impervious container a quantity of polymeric film chip materials containing a cyanide compound, and then submerging the cyanide containing polymeric film chip materials in a solution containing hypochlorite ion at a pH of approximately 9.5 to 10.5 until the cyanide in the polymeric film chip material is substantially converted into cyanate. In preferred alternative embodiments the treatment solution is replaced with a second treatment solution containing hypochlorite ion and having a pH of approximately 7.5 to 8 until the cyanate is substantially converted into carbon dioxide and nitrogen gases. Mixing means in the form of influent and effluent means are provided in such apparatus.

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