Document Details
PURL
Title:
PRECIPITATION IN REDOX BACKCYCLE CONCENTRATOR
Author(s):
Subject Terms:
200 West AreaCHROMATESCONCENTRATIONIRON (III) COMPOUNDSREDOXREDOX PROCESS - ANALYTICAL CONTROLSeparation Processes and Procedures
Document Location:
DOE Public Reading Room - Hanford Battelle P.O. Box 999 MS H2-53 Richland WA 99352 (509)372-7443
Document Type:
REPORT
Publication Date:
1957 Jan 03
Declassification Date:
1981 Jul 22
Declassification Status:
Declassified
Document Pages:
4
Accession Number:
RL-1-364922
Document Number(s):
HW-47673
Originating Research Org.:
GE - HAPO
OpenNet Entry Date:
2004 Feb 24
OpenNet Modified Date:
2015 Aug 28
Description/Abstract:
FROM ANALYSIS, THE PPT IS THOUGHT TO BE A MIXTURE OF FERRIC CHROMATE , FERRIC HYDROXIDE, AND ALUMINA. THE PPT IS FORMED IN SOLUTIONS GREATER THAN 0.2 M DEFICIENT IN HNO3 WHEN CR (VI) AND FE (III) ARE PRESENT. FORMATION OF TEH PPT IS PREVENTED BY (1) REMOVING FE FROM THE SYSTEM (2) REDUCING CR (VI) TO CR (II) OR (3) THE APPARENT LOWERING OF THE SOLUTION (BY DECREASING THE ACID DEFICIENCY TO LESS THAN 0.2 M, ADDING U TO MORE THAN 0.05 M OR INCREASING ANN CONCN TO GREATER THAN 2.4 M) TABULATES DATA GIVING PPTN IN IABS SOLUTIONS AS A FUNCTION OF ACIDITY, CR CONCN AND VALENCE STATE, U CONCN, AND AL(NO3)3 CONCN.