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:
Jan. 08, 1980
Filed:
Oct. 19, 1978
Harold J Swindell, Gladstone, MO (US);
Phillips Petroleum Company, Bartlesville, OK (US);
Abstract
Method and apparatus are disclosed for the automatic adjustment of the fractionation column pressure in a fractionator system which employs total condensation of overhead vapor and a liquid full reflux accumulator to thus float the column pressure above minimum column pressure. The set point of a pressure controller, which manipulates the overhead product control valve to adjust column pressure, is automatically adjusted in response to a desired offset of condensate subcooling from the overhead bubble point temperature which is repeatedly automatically calculated in response to analysis of the overhead product composition and pressure. Appropriate limits and overrides are also disclosed to prevent sudden changes in column pressure which might upset system operation.