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:
May. 11, 2010
Filed:
May. 09, 2003
Giorgio Gandolfi, Mediglia-Milan, IT;
Giuseppe Merelli, Vertova-Bergamo, IT;
Andrea Scotto, Basiglio-Milan, IT;
Gian Pietro Testa, Vertova-Bergamo, IT;
Giorgio Gandolfi, Mediglia-Milan, IT;
Giuseppe Merelli, Vertova-Bergamo, IT;
Andrea Scotto, Basiglio-Milan, IT;
Gian Pietro Testa, Vertova-Bergamo, IT;
Snamprogetti S.p.A., San Donato Milanese, IT;
Abstract
A tube bundle apparatus for thermal exchange operations at high pressures and temperatures, under conditions of high aggressiveness of process fluids. The tube bundle includes a series of tubes whose internal wall includes a material selected from titanium, zirconium, or an alloy thereof, resistant to aggression of fluids, in which at least one of access chambers to the tube bundle is delimited by a wall including at least the following three metallic layers in succession: a) an external layer for tolerating pressure load, subject to corrosion by contact with the highly aggressive process fluid; b) an intermediate layer of stainless steel; (c) an anticorrosive lining in contact with the highly corrosive fluid, of a material selected from titanium, zirconium, or an alloy thereof. The apparatus can be particularly used as an exchanger/reactor, for example as a stripper, in the high pressure cycle of synthesis processes of urea.