| 摘要 |
1276824 Production of copper from cuprous cyanide TREADWELL CORP 16 Sept 1970 [1 Oct 1969] 44166/70 Heading C7D Cuprous cyanide is suspended in a high-boiling oil such as paraffin oil at a temperature from about 190‹C. to below the boiling temperature of the oil and hydrogen is passed through the suspension in substantial excess until reduction to metallic copper is complete. The mixture of excess hydrogen and hydrocyanic acid gas is cooled and the constituents separated from one another, the hydrogen being reheated by heat exchange with hot mixed gases and recycled to the process. The process may be operated as a batch process or as a continuous process in which the suspension overflows from a first reactor to a second and succeeding reactors, hydrogen being passed through each, copper being separated from the copper suspension flowing from the last reactor. |
