Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1996-07-12
1997-09-30
Glick, Edward J.
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
250343, 250573, 356 70, 356442, G01N 2125, G01N 2127
Patent
active
056728735
ABSTRACT:
In a method and an apparatus for determining a content of an aliphatic hydrocarbon insoluble matter in a residual fuel oil, the method includes the steps of: (a) measuring absorbances of a sample solution having an aliphatic hydrocarbon insoluble matter suspended in the sample solution at two spaced wavelengths of light in a wavelength range from 500 nm to 1,000 nm; and (b) performing an operation to determine the content of the aliphatic hydrocarbon insoluble matter in the sample solution by inserting the measured absorbances into the specific correlations. The contents of the insoluble matter in aliphatic hydrocarbons and asphaltene in the residual fuel oil can be determined in a precise and rapid manner even if the oil contains the particles of aromatic hydrocarbons such as toluene.
REFERENCES:
patent: 4843247 (1989-06-01), Yamazoe et al.
patent: 4940900 (1990-07-01), Lambert
"Rapid method of Determination of Asphaltene Content in Petroleum Crudes and Products", Mirsayapova et al., Chemistry and Technology of Fuels and Oils, vol. 12, No. 9/10, Jan. 1, 1976, pp. 805-807.
"Mesure de la Teneur en Asphaltenes des Coupes Lourdes du Petrole par Spectrophotometrie", Bouquet et al., International Symposium on Characterization of Heavy Crude Oils and Petroleum Residues, Jun. 25, 1984, pp. 196-199.
Revue de L'Institut Francais du Petrole, vol. 38 No. 1, Jan. 1983, Paris Fr., pp. 101-120, XP002016861, G. Hotier et al., the whole document.
Cosmo Oil Co. Ltd.
Cosmo Research Institute
Glick Edward J.
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