Skip directly to search Skip directly to A to Z list Skip directly to page options Skip directly to site content

NIOSHTIC-2 Publications Search

Search Results

Hydrometallurgical process for cuprous oxide and diammine copper (I) complex production.

Authors
Haskett-PR; Bauer-DJ; Lindstrom-RE; Elges-CH III
Source
U S Pat 3 833 717 Sept 3 1974 :
Link
NIOSHTIC No.
10012019
Abstract
An aqueous solution containing cu2+, e.g., from the ammoniacal leaching of cu ore or scrap, is adjusted to contain 2-4 moles nh4oh/mole cu by adding nh3. The resulting solution is put into an autoclave, pressurized at approximately 200 psig with CO, and heated at approximately 120 deg. C for 30 min to reduce the cu2+ to cu+. The pressure is then released, the solution is cooled to approximately 90 deg. C, and aqueous naoh is added to precipitate cu2o and evolve nh3. The solution is reheated to expel nh3, and the cu2o is filtered off, washed, and dried in vacuo. The cu recovery is almost quantitative.
Publication Date
19740101
Document Type
PA
Fiscal Year
1974
NTIS Accession No.
NTIS Price
Identifying No.
PAT 3,833,717
NIOSH Division
RERC
Source Name
U.S. Pat. 3,833,717; Sept. 3, 1974 Chem. Abstr. 81:139,061M
State
NV
TOP