The resistance of an oil to emulsification, or the ability of an oil to separate from any water with which it is mixed. The better the demulsibility rating, the more quickly the oil separates from wat [..]

A closed-cup flash tester for kerosene and other oils Absolute pressure: Total pressure equal to gauge pressure plus 14.7 lbs./sq. in at sea level Acidity: The presence of acid-type constituents whose [..]

Group of hydrocarbons of which benzene is the parent. They are called "aromatics" because many of their derivatives have sweet or aromatic odors. Ash: Inorganic residue remaining aft [..]

A unit of volume measurement used for petroleum and its products. 1 barrel = 42 U.S. gallons or 35 British gallons Bbl: Abbreviation for barrel. Benzene: An aromatic hydrocarbon which is a colorless, [..]

The amount of heat required to raise the temperature of 1 gram of water by 1 degree centigrade, at or near maximum density. Calorific Value: Amount of heat produced by the complete combustion of a uni [..]

A process that causes the decomposition of a chemical compound by the use of electricity. Emulsion: A liquid mixture of two or more liquid substances not normally dissolved in one another, one liquid [..]

Temperature scale based on 32F for the temperature at which water freezes and 212F for the temperature at which water boils (180 difference). Conversion to Farhenheit from Celsius (centigrade) tempera [..]

The highest temperature indicated on the thermometer inserted in the flask during a standard laboratory distillation. This is generally the temperature at which no more vapor can be driven over into t [..]

Designation for No.2 heating oils and diesel fuels. A clean distillate fuel oil.

Initial Boiling Point. In a standard laboratory distillation, the temperature on the distillation thermometer at the moment the first drop of distillate falls from the condenser. Innage: Space occupie [..]