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:
Feb. 20, 1990
Filed:
Jun. 09, 1988
Applicant:
Inventors:
Ting Y Chan, Houston, TX (US);
John C Strickland, Houston, TX (US);
Assignee:
Texaco Inc., White Plains, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
C10B / ; C10B / ;
U.S. Cl.
CPC ...
208152 ; 208106 ; 208107 ; 208108 ; 208111 ; 208113 ; 208120 ; 208171 ; 208143 ; 208146 ; 208143 ; 208157 ; 208153 ; 208165 ;
Abstract
An improved method of controlling catalyst inventory in the reactor of an ebullated bed process has been discovered. Pressure differentials are measured to calculate a catalyst inventory characterization factor. Aged catalyst is withdrawn and fresh catalyst added in an amount to reestablish the value of the factor. The catalyst to oil ratio is maintained despite changes in bed ebullation, gas and liquid holdups and oil residence time changes.