Patents by Inventor Moshe Kreisel

Moshe Kreisel 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 manufacture of potassium nitrate
    Patent number: 4378342
    Abstract: The present invention relates to a process for the manufacture of potassium nitrate from potassium chloride and nitric acid. According to the invention, potassium chloride and nitric acid are reacted in an aqueous medium at a temperature in the range of between -25.degree. C. to +10.degree. C. From the brine solution obtained after the separation of the resulting potassium nitrate, nitric acid is extracted by an organic solvent solution containing at least one compound selected from the group consisting of ketones having five to ten carbon atoms, straight or cyclic polyethers having molecular weight in the range of 100 to 1000, polyalkylene glycols slightly miscible in water and having molecular weight in the range of 1000 to 3000, and organic esters of phosphoric acid, phosphonic acid and phosphinic acid, or mixtures thereof, in an organic diluent which does not substantially extract hydrochloric acid. The remaining aqueous solution consists of a substantially nitrate-free brine containing hydrochloric acid.
    Type: Grant
    Filed: March 31, 1981
    Date of Patent: March 29, 1983
    Assignee: Haifa Chemicals Ltd.
    Inventors: Shalom Manor, Moshe Bar-Guri, Amiad Alexandron, Moshe Kreisel
  • Process for the manufacture of potassium nitrate with co-production of hydrochloric acid
    Patent number: 4364914
    Abstract: The present invention relates to a process for the manufacture of potassium nitrate with co-production of relatively concentrated aqueous solution of hydrochloric acid.According to the invention, potassium chloride and nitric acid are reacted in the medium of an organic solvent selected from butanols and pentanols. The solution obtained after the separation of the resulting potassium nitrate, containing hydrochloric acid together with nitric acid and said organic solvent, is subsequently washed thus resulting an aqueous solution of hydrochloric acid which contains nitric acid. The nitric acid is extracted by an organic solvent selected from organic esters of phosphoric acid, ketones having five to ten carbon atoms and straight or cyclic polyethers having molecular weight in the range of 100 to 1000 and polyalkylene glycols which are slightly miscible in water and having molecular weight in the range of 1000 to 3000, or mixtures thereof, preferably in the presence of an organic diluent.
    Type: Grant
    Filed: March 31, 1981
    Date of Patent: December 21, 1982
    Assignee: Haifa Chemicals Ltd.
    Inventors: Shalom Manor, Moshe Bar-Guri, Amiad Alexandron, Moshe Kreisel