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:
Nov. 09, 1976
Filed:
Feb. 27, 1975
Sandor Gal, Budapest, HU;
Bela Eross, Budapest, HU;
Erno Pungor, Budapest, HU;
Geza Siposs, Budapest, HU;
Adorjan Monostory, Veszprem, HU;
Jozsef Barlai, Veszprem, HU;
Margit Szeiler nee Nemeth, Varpalota, HU;
Peti Nitrogenmuvek, Peti, HU;
Budapesti Muszaki Egyetem, Budapest, HU;
Peti Nitrogenmuvek, Peti, HU;
Abstract
The invention relates to a continuous process for the preparation of Raney catalysts with controlled particle size, wherein the alloy of the catalytically active metal formed with aluminium and/or zinc is subjected to alkaline leaching, the hydrogen gas formed in this leaching step is separated and removed, the obtained product is washed, and the obtained catalyst with the desired particle size is separated. The improvement in this process comprises leaching the aluminium and/or zinc component of the alloy in a medium constantly kept in a turbulent flow, and removing the solid particles smaller than the desired range during the washing of the catalyst. The invention relates further to an apparatus for carrying out the above process, comprising a reaction chamber 1 made of one or more reactor(s) and equipped with feeding inlets 2, 3, and 4, a separator 6 equipped with a gas removing outlet 7, a tubing connecting said reaction chamber 1 to said separator 6, a washing-separating-sorting unit 9 equipped with one or more washing liquid introducing inlet(s) 10 and washing liquid removing outlet(s) 11, a tubing 8 connecting said separator 6 to said washing-separating-sorting unit 9, a storing unit 12, and a tubing 13 connecting said washing-separating-sorting unit 9 to said storing unit 12. According to the invention Raney catalysts with controlled particle size and constant characteristics can be prepared in a continuous operation.