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. 19, 2000
Filed:
Jun. 16, 1998
Ari Minkkinen, Saint Nom la Breteche, FR;
Paul Mikitenko, Noisy le Roy, FR;
Institut Francais du Petrole, Rueil Malmaison Cedex, FR;
Abstract
Device and process for crystallizing a component, e.g. paraxylene, from a mixture that comprises a chamber (1) that has in its upper part means (46) for supplying the mixture, collecting means (20), and in its lower part, crystals of the component in suspension in a mother liquor, connected to means (C) for separation and purification of the crystals that are obtained, means (9) for supplying a cold gaseous fluid and means (22) for drawing off the so-called hot gaseous fluid that results from the direct heat exchange, whereby said device also comprises means for shaping a descending flow of the mixture onto tubes such that the cold gaseous fluid that circulates upward exchanges cold directly with the mixture, whereby means (22) for drawing off the hot gaseous fluid are connected to at least one fluid recompression means (24b), whose output is connected to at least one heat exchanger (27), whereby the heat exchanger is connected to a turbo-expander (30), which is connected to means (31) for supplying cold gaseous fluid.