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Electrolytic preparation of high-purity chromium.

Authors
Lei KPV; Hiegel JN; Sullivan TA
Source
J Less-Common Met 1972 Jun; 27(3):353-365
Link
https://doi.org/10.1016/0022-5088(72)90067-7
NIOSHTIC No.
10010413
Abstract
The preparation of high-purity chromium from commercial, aqueous electrolytic chromium has been investigated. Factors influencing the refining process, such as cell design, electrolyte components, chromium concentration in electrolytes, and cell operating parameters, have been studied. An improved molten-salt electrolytic refining process has been developed for the preparation of high- purity chromium with total impurity contents of less than 70 ppm, using a KCl-LiCl-CrCl2 electrolyte at 520 deg C. High-purity chromium deposits ranging from 0.2 to 0.3 kg have been routinely prepared with initial cathode current densities of 40 to 210 A/ft2 with average current efficiency of 96 percent. The chromium recovery in the process was 99 percent.
Keywords
Metals; Metallurgical-processes; Metallurgy; Chromium-compounds
CODEN
JCOMAH
Publication Date
19720601
Document Type
OP; Journal Article
Fiscal Year
1972
Identifying No.
OP 114-72
Issue of Publication
3
ISSN
0022-5088
NIOSH Division
BCEL
Source Name
Journal of the Less-Common Metals
State
NV
Page last reviewed: October 8, 2021
Content source: National Institute for Occupational Safety and Health Education and Information Division