Chemistry: physical processes – Physical processes – Crystallization
Patent
1979-04-12
1980-12-09
Richman, Barry S.
Chemistry: physical processes
Physical processes
Crystallization
23230M, 422 61, 422 68, G01N 3122, G01N 3328
Patent
active
042381975
ABSTRACT:
A method for analyzing a used lubricating oil for iron wear metal content in which all of the iron in a sample of the oil is extracted into an oil immiscible layer, buffering and reducing agents are added, and the iron in the solution is reacted with a chelating agent to forma red complex indicative of the iron content. Apparatus for carrying out the method comprises six containers, one for a lubricating oil sample and each of the other five being for a separate reagent. Also included are a reaction chamber, means for transferring oil sample and reagents from the containers to the reaction chamber which may also function as a test cell.
REFERENCES:
Davis. L. L., "Examination of Used Crankcase Oil", Refiner & Natural Gasoline Manufacturer, vol. 21, No. 4, Apr. 1942, pp. 63-66 & 82.
Brooks Joseph J.
Duffy Thomas G.
Eisentraut Kent J.
Hillan William J.
Ross William D.
Kuhn Cedric H.
Richman Barry S.
Rusz Joseph E.
The United States of America as represented by the Secretary of
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