Hydrocarbon characterized by unsaturated ring structures of the carbon atoms. Commercial petroleum aromatics are benzene, toluene, and xylenes.

The fractionating column in a natural gasoline plant in which ethane and lighter components are removed overhead. The gas stream remaining is deethanized.

The disappearance of one substance into another so that the absorbed substance loses its identifying characteristics, while the absorbing substance retains most of its original physical aspects. U [..]

Process in which unfinished petroleum products, such as gasoline, naphthas, kerosine, diesel fuel, and lubricating-oil stocks, are contacted with sulfuric acid to improced their color, odor, and o [..]

Any materials incorporated in finished petroleum products for improving their performance in existing applications or for broadening the areas of their utility.

A process in which a solid substance concentrates or holds another substance (usually liquid or gas) upon its surface.

Organic hydrocarbon compounds in which the carbon atoms are joined in open chains, as opposed to ring structures of aromatic and naphthenic compounds. Examples: ethane, propane, butane. Many are b [..]

A refinery process for chemically combining isoparaffin with olefin hydrocarbons. The product, alkylate, has high octane value and is blended with motor and aviation gasoline to improve the antikn [..]

American Melting Point. used for paraffin wax, it is an arbitrary 3&#186F above the ASTM D 87 test for melting point of paraffin wax.

The minimum temperature for a complete mixing of equal volumes of aniline, a liquid which has selective solvent action on hydrocarbons, and the oil being tested. Used in some specifications to ind [..]