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:
Jun. 26, 1990
Filed:
Aug. 29, 1988
Ulrich Sander, Friedrichsdorf, DE;
Metallgesellschaft AG, Frankfurt am Main, DE;
Abstract
A liquid mixture is separated by pervaporation in an apparatus formed by a unitary stack of upright rectangular plates, diaphragms, and seals held together by tie rods. Each of the plates is formed with two upper and two lower corners formed with respective holes and each plate is formed inward of the respective holes with a corrugated central portion and the holes of the plates are aligned horizontally. Each diaphragm is sandwiched between two plates to form a cell having a pair of compartments separated by the respective diaphragm. The seals are arranged in the upstream region of the stack such that the liquid mixture enters one of the lower holes, passes downstream along the upstream portion into one of the compartments of each cell, and its lighter fraction passes as vapor through the diaphragms into the other compartments of these cells while its heavier fraction passes back upstream and exits the apparatus from one of the upper holes. The lighter fraction moves downstream in the stack through one compartment of each of the downstream cells while a coolant is circulated through the other compartments of these downstream cells so this lighter fraction is condensed and exits the apparatus through one of the lower holes.