Analysis of lubricating oils for iron content
US4238197A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 12, 1979 |
| Grant date | Dec 9, 1980 |
| Priority date | — |
| Expiry date | Apr 12, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/255
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.