| 585 / | HD | CHEMISTRY OF HYDROCARBON COMPOUNDS |
| 800 | DF | PURIFICATION, SEPARATION, OR RECOVERY {7} |
| 833 | DF | .~ By addition of extraneous agent, e.g., solvent, etc. {15} |
| 845 | | .~.~ Cu {3} |
| 846 | DF | .~.~.~> Ammoniacal, e.g., Cu ammonium acetate (CAA), etc. {1} |
| 848 | DF | .~.~.~> Plural metal or nonhalide Cu compound-containing |
| 849 | DF | .~.~.~> Cu halide with added material other than water |