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:
Dec. 08, 1992
Filed:
Aug. 02, 1990
Andre Buisson, Tassin la Demi Lune, FR;
Jean-Paul Euzen, Dardilly, FR;
Frederic Morel, Sainte Foy les Lyon, FR;
Institut Francais du Petrole, Rueil Malmaison, FR;
Abstract
Process for the treatment of a hydrocarbon fraction containing metals and comprising the following stages: (a) the said hydrocarbon fraction is treated in the presence of mean density particles (d.sub.o) under conditions for eliminating at least partly the metals contained therein and deposits of said metals on at least one fraction of said solid particles; (b) at least part of the solid particles from stage (a), whose mean density is (d.sub.i) is drawn off; (c) said solid particles from stage (b) are magnetohydrostatically separated by introducing said solid particles into a ferrofluid placed in a non-uniform magnetic field and creating a vertical magnetic field, whose intensity is adjusted in such a way that the apparent mean density (d.sub.af) of the ferrofluid permits the separation of said solid particles into at least one mean density fraction (d.sub.i) below said apparent mean density (d.sub.af) of the ferrofluid and into at least one mean density fraction (d.sub.s) above said mean apparent density (d.sub.af) of the ferrofluid and above the mean density (d.sub.1) of the solid particles drawn off in stage (b); (b) at least one fraction of said mean density solid particles (d.sub.s) is recovered; and (e) recycling takes place to stage (a) of at least one fraction of said mean density solid particles (d.sub.i). The solid particles preferably comprise particles of a catalyst and the treatment is e.g. a hydrotreatment.