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:
Jan. 27, 1976
Filed:
Mar. 04, 1974
Hans-Dieter Marsch, Dortmund-Oespel, DT;
Friedrich Uhde GmbH, Dortmund, DT;
Abstract
A device for performing catalytic endothermic reactions which comprises a vessel having a heat exchanger provided with cooling tubes which extend through an outer tubesheet of the heat exchanger. These tubes are sealed against the outer tubesheet of the heat exchanger, and are connected rigidly to the inner tubesheet. Reaction tubes are provided with catalyst support grids, and the sections of these tubes below the grids are of a length that is at least equal to the diameter of the respective tubes. Downstream of the support grids, the process gas discharge tubes extend centrally through the catalyst-free portions of the reaction tubes and are spaced from the inner walls of the cooling tubes. The spaces between the process gas discharge tubes and the reaction tubes are filled with insulating material. The process gas discharge tubes, which are disposed within the cooling tubes, may extend to or beyond the outer tubesheets of the heat exchanger. The wall thickness of the process gas tubes below the catalyst support grids may be decreased in cross section, thereby decreasing the heat flux to the inner tubesheet.