Preparation of alcohol-containing gasoline
AssigneeBP Amoco Corporation
InventorsGerald K. Schmidt, Ken Tadano
Life of this patent
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Abstract
A process for controlling the composition of a subgrade gasoline so that the subgrade will yield an alcohol-containing gasoline which precisely meets desired specifications when mixed with the desired amount of alcohol. The process involves blending a plurality of blendstocks to produce a subgrade, withdrawing a sample of the subgrade, mixing it with a known amount of alcohol, analyzing the properties of the resulting mixture, and using the analysis results to control and optimize the blending process.
Claims25
In a process for preparing an alcohol-free subgrade blend which can be converted to an alcohol-containing gasoline of at least one property of known value by mixing the subgrade with alcohol, and wherein a plurality of blendstocks are mixed to yield the subgrade, the improvement which comprises:
- (a) selecting the alcohol concentration which is desired in said alcohol-containing gasoline;
- (b) preparing an analytical sample by withdrawing a sample of the subgrade and mixing it with a known amount of the alcohol;
- (c) analyzing the analytical sample to obtain a measurement of said property;
- and
- (d) using said measurement to control and optimize the process to produce a subgrade which will said gasoline when mixed with an amount of said alcohol which will provide an alcohol-containing gasoline which contains the selected alcohol concentration.
In a process for preparing an alcohol-containing gasoline of at least one property of known value, wherein an alcohol-free subgrade blend is prepared by mixing a plurality of blendstocks, and wherein the subgrade is subsequently mixed with alcohol to yield said gasoline, the improvement which comprises:
- (a) preparing a subgrade blend by mixing a plurality of blendstocks in a blending process which comprises:
- (1) selecting the alcohol concentration which is desired in said gasoline;
- (2) preparing an analytical sample by withdrawing a sample of the subgrade and mixing it with a known amount of the alcohol;
- (3) analyzing the analytical sample to obtain a measurement of said property;
- (4) using said measurement to control and optimize the blending process to produce a subgrade which will yield said gasoline when mixed with an amount of said alcohol which will provide an alcohol-containing gasoline which contains the selected alcohol concentration;
- and
- (b) mixing at least a portion of the subgrade blend with the required amount of alcohol to yield a finished gasoline which contains the selected alcohol concentration.
Dependencies are inferred from the claim text.