Abstract: The invention relates to a method for producing low-odor n-butane by catalytic hydrogenation of a feed mixture. The aim of the invention is to provide such a method, wherein the feed material, in addition to n-butane, n-butene and up to 1 mass % formic acid and/or up to 1 mass % pentanals and/or up to 0.5 mass % pentanols, also comprises carbon monoxide. The aim is achieved by treating the feed mixture in the temperature range of 15 to 120° C. with an aqueous solution of an alkali metal or alkaline earth metal hydroxide in the concentration range of 0.5 to 30 mass % and subsequently subjecting the feed mixture to the catalytic hydrogenation.
Type:
Grant
Filed:
May 21, 2010
Date of Patent:
September 30, 2014
Assignee:
Evonik Degussa GmbH
Inventors:
Hans-Gerd Lueken, Alfred Kaizik, Markus Winterberg, Wilfried Bueschken, Dirk Fridag
Abstract: The present invention relates to a continuous in-situ process for reducing the viscosity, corrosivity and density of heavy oils comprising the steps of (a) contacting a heavy oil with an anhydrous alkaline earth, Group IIA metal hydroxide and low pressure hydrogen at a temperature of about 380.degree. C. to about 450.degree. C. for a time sufficient to form the corresponding alkaline earth metal sulfide, recovering the reduced sulfur feed and regenerating the alkaline metal hydroxide for recycle to treat additional feed. Beneficially, the process removes heteroatoms (sulfur and nitrogen).
Abstract: A method for improving the storage stability of shale oil liquids by extracting or contacting the shale oil with a base solution having a pH of at least about 7.5 to inhibit the formation or reduce the level of sediment and gum which can form in said shale oil.
Type:
Grant
Filed:
January 3, 1984
Date of Patent:
July 30, 1985
Assignee:
Exxon Research and Engineering Co.
Inventors:
John W. Frankenfeld, Robert L. Bruncati
Abstract: A method for reprocessing used lubricating oils is disclosed wherein the oil is dried, treated with finely dispersed sodium metal at elevated temperature, the remaining free or organically bound metal is decomposed by means of an active hydrogen containing compounds, followed by distillation of the oil for recovery.
Type:
Grant
Filed:
March 22, 1979
Date of Patent:
March 10, 1981
Assignee:
Deutsche Gold und Silber-Scheideanstalt Vormals Roessler
Inventors:
Helmut Knorre, Manfred Langer, Gerhard Pohl