| Main Title |
Regeneration of chromated aluminum deoxidizers; phase I report / |
| Author |
Hicks, Harry C., ;
Jarmuth., Robert A.
|
| Other Authors |
|
| CORP Author |
Boeing Commercial Airplane Co., Seattle, Wash. |
| Publisher |
Office of Research and Development, U.S. Environmental Protection Agency, For sale by the Supt. of Docs., U.S. Govt. Print. Off. |
| Year Published |
1973 |
| Report Number |
EPA-660/2-73-023; EPA-12070-HEK; W74-07254 |
| Stock Number |
PB-231 835 |
| OCLC Number |
00991618 |
| Subjects |
Metals--Deoxidizing ;
Chromium ;
Salvage (Waste, etc) ;
Water--Pollution
|
| Additional Subjects |
Deoxidizers ;
Regneration(Engineering) ;
Chromates ;
Diaphragms(Mechanics) ;
Membranes ;
Electrolysis ;
Chromium inorganic compounds ;
Aluminum industry ;
Purification ;
Crystallization ;
Filtration ;
Oxidation ;
Metal finishing ;
Trace elements ;
Pilot plants ;
Cost estimates ;
Economic analysis ;
Industrial waste treatment ;
Water pollution abatement ;
Waste recycling
|
| Internet Access |
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| EJBD ARCHIVE |
EPA 660-2-73-023 |
|
Headquarters Library/Washington,DC |
03/30/2009 |
| EJBD |
EPA 660-2-73-023 |
c.1 |
Headquarters Library/Washington,DC |
05/07/2013 |
| ELBD RPS |
EPA 660-2-73-023 |
repository copy |
AWBERC Library/Cincinnati,OH |
02/18/2015 |
| NTIS |
PB-231 835 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
vi, 160 pages : illustrations ; 27 cm. |
| Abstract |
In the metal finishing industry highly concentrated hexavalent chromium solutions are used extensively to deoxidize aluminum surfaces prior to anodizing, conversion coatings, prepaint preparation, welding and adhesive bonding. A regeneration process was conceived and tested to reduce the frequency of discarding the spent chromated deoxidizers. The engineering techniques developed in this project involve reoxidation of trivalent chromium to the hexavalent state by electrolysis thru a diaphragm plus removal of undesirable dissolved metals by crystallization and separation. Results of the accomplished work establish that regeneration of chromated aluminum deoxidizers is feasible, practical and economical. |
| Notes |
Report prepared by The Boeing Commercial Airplane Company, Seattle, Washington. Prepared for Office of Research and Development, Environmental Protection Agency under project 12070 HEK, program element 1B2036. Includes bibliographical references (pages 87-88). |
