| 摘要 |
Silver is removed from polymeric film chips such as photographic and X-ray film in a caustic treatment bath which dissolves or separates the saran and gelatin layer from the polymer, particularly polyester, layer. The silver is captured for recovery in a diatomaceous filter medium through which the treatment bath liquid is passed. Preferably liquid passed to the filter is silver-rich liquid skimmed from the top of the treatment bath. Chips and other debris are seived or screened from the liquid before filtering.
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