Patents by Inventor Reinhold Schulze

Reinhold Schulze 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 isolation of noble metals
    Patent number: 4925485
    Abstract: The present invention involves the isolation or leaching of noble metals from materials containing noble metals, e.g. ores, by treating the noble metal- containing materials with a cyclic thiourea derivative under acid pH conditions. Removal is effected by adsorption onto charcoal or by an ion exchanger, for example. Preferred cyclic thioureas are N,N'-ethylenethiourea and N,N'-propylenethiourea and the acid pH conditions may be achieved by sulfuric acid or hydrochloric acid solutions containing 0.01 to 2.0% by weight of the cyclic thiourea.
    Type: Grant
    Filed: December 26, 1984
    Date of Patent: May 15, 1990
    Assignee: SKW Trostberg Aktiengesellschaft
    Inventor: Reinhold Schulze
  • Process for the recovery of noble metals from ores; which process uses thiourea
    Patent number: 4561947
    Abstract: The present invention provides a process for the hydrometallurgical recovery of noble metals from materials containing them by treatment with thiourea in an aqueous, acidic medium in the presence of an oxidation agent, wherein the aqueous medium simultaneously contains an oxidation agent and a reduction agent.
    Type: Grant
    Filed: February 9, 1984
    Date of Patent: December 31, 1985
    Assignee: SKW Trostberg Aktiengesellschaft
    Inventor: Reinhold Schulze
  • Process for the adsorptive removal of arsenic, antimony and/or bismuth from an aqueous solution
    Patent number: 4046687
    Abstract: A process for the adsorptive removal of one or more impurity elements, selected from the group which consists of: arsenic, antimony and bismuth, from an aqueous solution containing same in which the solution is contacted with a water-insoluble or low-solubility salt of phosphoric acid or a phosphoric acid ester (phosphate ester) on a porous substrate.
    Type: Grant
    Filed: March 31, 1976
    Date of Patent: September 6, 1977
    Assignee: Norddeutsche Affinerie
    Inventor: Reinhold Schulze
  • Method of preventing the supersaturation of electrolyte solutions with one or more of the impurities arsenic, antimony and bismuth, in the electrolytic refining of nonferrous metals, especially copper
    Patent number: 3988225
    Abstract: A process for the prevention of supersaturation of electrolytes from nonferrous metal refining (preferably copper refining) with arsenic, antimony and bismuth in which the electrolyte solution is brought into contact with a chemisorption agent on a flat substrate. The substrate with the chemisorption agent is brought into a compact form with neighboring substrates and is enclosed in a protective housing before being contacted with the electrolyte.
    Type: Grant
    Filed: May 12, 1975
    Date of Patent: October 26, 1976
    Assignee: Norddeutsche Affinerie
    Inventor: Reinhold Schulze
  • Method of forming active surfaces on solids
    Patent number: 3947612
    Abstract: A method of forming an active surface on a solid, e.g. for use of the solid as an adsorbent, catalyst carrier or contact or reactant catalyst, comprising adding a mixture of binders to a solution or suspension of an activatable substance (reactant), the binder mixture containing water-insoluble synthetic-resin substances which can be swelled by water only to a limited extent.
    Type: Grant
    Filed: April 17, 1973
    Date of Patent: March 30, 1976
    Assignee: Norddeutsche Affinerie
    Inventor: Reinhold Schulze