Method for optimizing control of a production unit
AssigneesBP Oil International Limited, BP Chemicals Limited
InventorsDidier C. Lambert, Andre Martens
Life of this patent
Estimating the term…
Abstract
The octane number of a product is directly determined from its near infrared (NIR) absorption spectrum in the wave number spectral range of from 6667 to 3840 centimeter .sup.-1. A number (n) of frequencies is selected within this range, and the (n) absorbance values are correlated with the octane number by using a multivariate regression analysis.
Claims10
In a process for optimizing the control of a production unit for making an internal combustion engine fuel product or base stock with a desired octane number, the improvement which comprises:
- (a) determining the octane number of said fuel product or base stock by (i) measuring the near infrared absorption of said fuel product or base stock within the wave number spectral range 4800-4000 cm.sup.-1, and (ii) directly correlating by means of multivariate regression analysis the (n) absorbance values obtained with the octane number of said product or base stock;
- and (b) employing said determined octane number to control and optimize the process to produce said desired octane number.
The process according to claim 7 wherein the gasoline contains lead alkyls.
Dependencies are inferred from the claim text.