A method and apparatus for measuring the true of the divider point or the point of water or a non-woven carbon fabric oils

摘要

950,375. Determining cloud points. BRITISH PETROLEUM CO. Ltd., and P. G. HOLBOURNE. Jan. 4,1963 [Feb. 5,1962], No. 4358/62. Headings G1A and G1D. The cloud point of a hydrocarbon oil is determined by passing it through a drying means 13 to a measuring cell 11, directing a beam of light from source 17 through the oil to a reflecting surface 19, cooling the oil such as by a thermoelectric cooler 24 and measuring the temperature, such as by thermocouple 25, when the intensity of the beam of light from the surface 19 decreases a predetermined amount. A reference cell 12 may be arranged to contain the same oil at ambient temperature and a beam of light of the same intensity as the first one is passed from source 17 through the oil to be reflected at 21, the two reflected beams being received by photo-electric cells 22, 23 arranged in a bridge circuit which is balanced at ambient temperatures. When the bridge becomes unbalanced to a sufficient extent, the degree of unbalance being adjustable so that pour point or cloud point may be determined, the pour point normally being about 6‹C. lower than the cloud point, a relay is actuated which causes thermocouple 25 to operate a recorder and a second relay to be operated and held for about a minute so that cooler 24 is switched off and valve 16 opened. The tested oil thus flows out of the system and a fresh sample flows in. The chamber 10 may be evacuated.