Rapid determination of sludge content and device therefor

Details Rapid determination of sludge content and device therefor Rapid determination of sludge content and device therefor

1989-05-04

1990-05-29

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356436, G01N 1506

Patent

active

049298470

ABSTRACT:
A method for determining a sludge content in a heavy hydrocarbon oil and a device therefor are disclosed. The method comprises measuring absorbances of a heavy hydrocarbon oil sample, having an oil film thickness selected form a range of form about 0.01 to 5 mm, at two different wavelengths selected from the visible light region of from 500 to 1000 nm and determining a sludge content of the sample oil by comparing two measured absorbances according to the relationship between known sludge contents and absorbances at the two wavelengths. The device comprises a light source, a cell for a sample oil, a two-wavelength absorbance detector containing two interference filters and two light-current transducers, and a computing means for converting the current values obtained into a sludge content. The method and device provide a means for rapid and precise determination of sludge contents in heavy hydrocarbon oils.

REFERENCES:
patent: 2761067 (1956-08-01), Troy, Jr.
patent: 3781092 (1973-12-01), Sussman et al.
patent: 3790156 (1975-06-01), Heigl et al.
patent: 4136959 (1979-01-01), Honkawa et al.
patent: 4544840 (1985-10-01), Keller
patent: 4843247 (1989-06-01), Yamazoe et al.

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