Patents by Inventor Lev Shapira

Lev Shapira 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).

  • Process for the preparation of pure silica
    Patent number: 7534411
    Abstract: A production process for producing high-purity silica from a crude silica source by means of fluosilic acid, including the steps of: (a) subjecting the crude silica souce and the fluosilicic acid to a reaction in a reaction stage, so as to produce silicon tetrafluoride and water; (b) selectively evaporating the silicon tetrafluoride with respect to at least a portion of at least one impurity derived from the crude silica source, and (c) reacting the silicon tetrafluoride with water to produce the high-purity silica, wherein the reaction stage (a) is performed at a temperature above 75° C.
    Type: Grant
    Filed: February 26, 2003
    Date of Patent: May 19, 2009
    Assignee: STI Silicon Technologies Israel Ltd.
    Inventors: Lev Shapira, Simcha Harel
  • Production of aluminum compounds and silica from ores
    Patent number: 7090809
    Abstract: A method for the production of inorganic aluminum substances and amorphous silica from aluminum oxide containing ores, comprising: (a) leaching of said ores with fluorosilicic acid to obtain aluminum fluosilicate solution; (b) filtering said leached solution from insoluble materials; and (c) washing said insoluble materials.
    Type: Grant
    Filed: December 27, 2001
    Date of Patent: August 15, 2006
    Assignee: ATI-Aluminum Technologies Israel Ltd.
    Inventors: Simcha Harel, Lev Shapira
  • Process for the preparation of pure silica
    Publication number: 20050106091
    Abstract: A production process for producing high-purity silica from a crude silica source by means of fluosilic acid, including the steps of: (a) subjecting the crude silica souce and the fluosilicic acid to a reaction in a reaction stage, so as to produce silicon tetrafluoride and water; (b) selectively evaporating the silicon tetrafluoride with respect to at least a portion of at least one impurity derived from the crude silica source, and (c) reacting the silicon tetrafluoride with water to produce the high-purity silica, wherein the reaction stage (a) is performed at a temperature above 75° C.
    Type: Application
    Filed: February 26, 2003
    Publication date: May 19, 2005
    Inventors: Lev Shapira, Simcha Harel
  • Production of aluminum compounds and silica from ores
    Publication number: 20040047791
    Abstract: A method for the production of inorganic aluminum substances and amorphous silica from aluminum oxide containing ores, comprising: (a) leaching of said ores with fluorosilicic acid to obtain aluminum fluosilicate solution; (b) filtering said leached solution from insoluble materials; and (c) washing said insoluble materials.
    Type: Application
    Filed: June 27, 2003
    Publication date: March 11, 2004
    Inventors: Simcha Harel, Lev Shapira