Patents by Inventor Antonio T. Robles

Antonio T. Robles 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 for preparing acidic solutions of activated silica for water treatment
    Patent number: 7959800
    Abstract: A process is disclosed for the production of acidic solutions of activated silica for water treatment. Activated silica is formed during the process of acidifying a sodium silicate solution to below pH 2 with sulfuric acid.
    Type: Grant
    Filed: January 20, 2010
    Date of Patent: June 14, 2011
    Inventor: Antonio T. Robles
  • METHOD FOR PREPARING ACIDIC SOLUTIONS OF ACTIVATED SILICA FOR WATER TREATMENT
    Publication number: 20100155643
    Abstract: A process is disclosed for the production of acidic solutions of activated silica for water treatment. Activated silica is formed during the process of acidifying a sodium silicate solution to below pH 2 with sulfuric acid.
    Type: Application
    Filed: January 20, 2010
    Publication date: June 24, 2010
    Inventor: Antonio T. Robles
  • Method for preparing acidic solutions of activated silica and polyvalent metal salt for water treatment
    Patent number: 7674374
    Abstract: A process is disclosed for the production of acidic solutions of activated silica for water treatment. Activated silica is formed during the process of acidifying a sodium silicate solution to below pH 4 with sulfuric acid. A polyvalent metal salt is then added to stabilize the acidified activated silica.
    Type: Grant
    Filed: November 1, 2005
    Date of Patent: March 9, 2010
    Inventor: Antonio T. Robles
  • Method for the regeneration of sorbent materials
    Publication number: 20010008617
    Abstract: The process of the present invention is directed to the use of sulfuric acid and/or an organic acid to regenerate spent sorbent from a metal recovery process. The sorbent can be activated carbon.
    Type: Application
    Filed: December 4, 2000
    Publication date: July 19, 2001
    Inventor: Antonio T. Robles
  • Process for eluting precious metals from activated carbon
    Patent number: 6200364
    Abstract: A process is disclosed for the recovery of gold and/or silver values from activated carbon, wherein they are adsorbed as cyanide complexes. The process uses an eluant containing sugar. The process allows the eluant to pass through fresh carbon twice, thereby reducing the volume of the gold-loaded eluant. This, in turn, reduces the size of the electrowinning or zinc precipitation circuits. The process also improves elution efficiency when barren electrowinning solution is recycled in the elution process.
    Type: Grant
    Filed: August 13, 1999
    Date of Patent: March 13, 2001
    Inventor: Antonio T. Robles