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The continuing demand for high octane number, especially on the road, and for freedom from surface ignition will dictate the increased use of isoparaffins and limit the use of other high-octane components. Processes for the production of the isoparaffins are at hand and the development of others is anticipated. Specifications to ensure control of composition may be in several forms. The performance test will, of course, be one or more laboratory knock ratings; it is not anticipated that road ratings will be specified. Although two knock ratings will, by their determination of “sensitivity,” control composition to a great extent, it may be desirable to supplement knock tests or replace one of them with a physical or chemical inspection such as FIA or Bromine Number.
Faust, W. J.
Universal Oil Products Co., Des Plaines, Ill.