Patent ID: 8176951

Claim:
A system for in-line blending of gasoline and butane comprising: a) a gasoline stream having a volumetric flow rate that varies over time; b) a butane stream; c) a blending unit for blending said gasoline stream and said butane stream at an actual blend ratio and an actual blend rate to yield a blended gasoline stream; d) an upstream vapor pressure sensor in sensory communication with said gasoline stream upstream of said blending unit; and e) one or more information processing units (IPUs) in informational communication with said upstream vapor pressure sensors, logically programmed to calculate a calculated blend ratio and calculated blend rate based upon vapor pressure and volumetric flow rate of said gasoline stream, and for communicating said calculated blend ratio and calculated blend rate to said blending unit; wherein said blending unit periodically receives said calculated blend ratio and calculated blend rate from said one or more IPUs, and adjusts the actual blend ratio and actual blend rate to coincide with said calculated blend ratio and calculated blend rate.