The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 22, 1976
Filed:
Aug. 19, 1974
Charles W Harrison, Nederland, TX (US);
Glenn A Senters, Beaumont, TX (US);
Texaco Inc., New York, NY (US);
Abstract
The temperature of light straight run gasoline from a depropanizer tower is controlled as the function of the Reid Vapor Pressure change of a crude oil feeding a flash tower which provides an overhead product to the depropanizer tower and flashed crude oil to an atmospheric tower. The Reid Vapor Pressure is determined from the overhead product, the flashed crude, the pressure of the vapor in the flash tower and the temperature of liquid in the flash tower. A control unit includes a network which determines a change in the Reid Vapor Pressure as the quality of the feed crude oil to the flash tower changes. The network determines the change in the Reid Vapor Pressure and when the change exceeds a limit, provides a feed forward signal corresponding to a desired temperature associated with the new Reid Vapor Pressure. The desired temperature signal is determined in accordance with the equations hereinafter disclosed. The desired temperature signal is supplied to a time select circuit which will not implement the desired temperature signal until after the elapse of a predetermined time interval to account for the delay time for the change of feed crude oil to effect the quality of the feed to the depropanizer tower so that the temperature control may be implemented at the proper time.