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:
Mar. 03, 1992
Filed:
Aug. 28, 1990
Gerard Hotier, Rueil Malmaison, FR;
Jean-Michel Toussaint, Asnieres, FR;
Gabriel Terneuil, Grenoble, FR;
Daniel Lonchamp, La Demi Lune, FR;
Institut Francais du Petrole, Rueil Malmaison, FR;
Abstract
A description is given of a process and an apparatus for continuous separation in fluid phase of a mixture of at least three constituents into three fractions. A technique is used, known as the simulated countercurrent technique, in a separation column which is filled with sorbent and has 6 zones 6, 5, 4, 3, 2 and 1 which have different functions, and the following sequence of steps is carried out: strong solvent S.sub.2 is introduced, an extract E.sub.2 with strong solvent is removed, weak solvent S.sub.1 is introduced. The extract with weak solvent E.sub.1 is drawn off, the separating mixture is introduced, refined substance is drawn off with weak solvent R, rinsing solvent (S.sub.1) is introduced, a current Rcy is recycled alternatingly towards the feed of strong solvent S.sub.2 and then towards the feed of weak solvent S.sub.1. A current coming from zone 6 is sent alternatingly to an outlet for the extract with strong solvent E.sub.2, then towards the intake of the fifth zone. The various feeds and substances removed are periodically advanced synchronously through the column. Application in particular for the separation of glucose, xylose and arabinose and for the separation of paraxylene, orthoxylene and metaxylene and ethyl benzene.