发明名称 |
Recovery of silver and other valuable constituents from polyester based photographic film |
摘要 |
Scrap photographic film comprising at least a four component system involving a polyalkyleneterephthalate film base, an adhesive or subbing layer utilizing a terpolymer consisting chiefly of polyvinylidenechloride and a gelatin layer containing metallic silver or a compound thereof and a variety of contaminants such as causal dirt, dyes and the like is broken down for recovery of the valuable constituents therein including the silver, the polyvinylidenechloride terpolymer, and the polyesters by treating the chopped photographic film at an elevated temperature with a solvent for both the polyester and polyvinylidenechloride values in which solvent both the gelatin and silver values are insoluble, under conditions chosen to insure the quantitative recovery of the silver values.
|
申请公布号 |
US4078916(A) |
申请公布日期 |
1978.03.14 |
申请号 |
US19770784829 |
申请日期 |
1977.04.05 |
申请人 |
HORIZONS RESEARCH INCORPORATED |
发明人 |
GERBER, ARTHUR H.;WAINER, EUGENE |
分类号 |
C08L67/00;B09B3/00;B29B11/00;B29B17/02;B29B17/04;C08J3/14;C08J11/08;G03C11/24;(IPC1-7):C22B11/00;C08J11/04 |
主分类号 |
C08L67/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|