Patents by Inventor Ulf Vilhelm Kuylenstierna

Ulf Vilhelm Kuylenstierna has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method of recovering metals out of soot originating from the combustion of oil
    Patent number: 4100251
    Abstract: Soot produced in the combustion of fuel oil contains valuable metals, such as vanadium and nickel. The soot can be disposed of, and the valuable metals can be recovered, by leaching the soot with an aqueous solution of sulphuric acid, to extract part of the metal content from the soot, combusting the soot thus leached, and leaching the combustion residue with an aqueous solution of sulphuric acid, to extract an additional part of the metal content. The solution produced in this second leaching process is preferably returned to the leaching of the soot. Metals can be recovered in a way known per se from the solution produced in the leaching of the soot.
    Type: Grant
    Filed: April 7, 1977
    Date of Patent: July 11, 1978
    Assignee: Sotex AB
    Inventors: Nils Reinhardt, Ulf Vilhelm Kuylenstierna, Bengt Agne Alfredsson