Method of testing oil for ionic contaminants

Details Method of testing oil for ionic contaminants Method of testing oil for ionic contaminants

1981-03-03

1984-02-28

Turk, Arnold

Chemistry: analytical and immunological testing

Lubricant, grease, mineral oil, hydrocarbon oil product, or...

62125, 62470, 324439, 436150, G01N 2706

Patent

active

044342330

ABSTRACT:
A method of testing oil for ionic contaminants is disclosed. The method comprises isolating a sample of the oil to be tested and mixing it with an equal weight of distilled water to dissolve ionic contaminants in the oil sample into the distilled water. Then, the contaminated water is separated from the mixture and its conductivity is determined. An alternative to separating the contaminated water is to use a surfactant to form an oil in water emulsion with the oil sample and the distilled water. The conductivity of the emulsion is determined directly. The magnitude of the conductivity directly indicates the amount of ionic contaminants present in the oil being tested. This method is especially suitable for determining the level of ionic contamination in the refrigerant of a refrigeration system of the type having a compressor drive which is lubricated with oil and wherein there is contact between the refrigerant and the oil. Ionic contaminants in the refrigerant of a refrigeration system are direct indicators of the presence of excessive amounts of water and/or certain undesirable metals in the refrigerant since these substances cause the formation of ionic contaminants in the refrigerant.

REFERENCES:
patent: 2122578 (1938-07-01), McMaster et al.
patent: 2155051 (1939-04-01), Kagi
patent: 2782151 (1957-02-01), Suthard
patent: 3271111 (1966-09-01), Boyd, Jr. et al.
patent: 4009998 (1977-03-01), Benningfield, Jr.
patent: 4023931 (1977-05-01), Wolfgram
patent: 4288402 (1981-09-01), Ellis

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