Patents by Inventor Hans-Joachim Morawietz

Hans-Joachim Morawietz 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 selective flotation of phosphorus minerals
    Patent number: 4968415
    Abstract: A process for selective flotation of phosphate minerals, wherein a compound of the formula 1a or 1b ##STR1## in which R.sup.1 is branched or unbranched C.sub.8 -C.sub.24 -alkenyl, R.sup.2 is branched or unbranched C.sub.1 -C.sub.4 -alkyl and M is hydrogen, ammonium, triethanolammonium, an alkali metal atom or an alkaline earth metal atom, is added as a collecting agent to the flotation suspension.
    Type: Grant
    Filed: January 10, 1990
    Date of Patent: November 6, 1990
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Hans-Joachim Morawietz, Werner Ritschel, Kurt Bauer
  • 3-Oxypropyleneimino-bis-(methylene phosphonic acids) and their salts, process for their manufacture and their use
    Patent number: 4450116
    Abstract: 3-Alkoxypropylenimino-bis-(methylene phosphonic acids) of the formula ##STR1## wherein R is straight-chain or branched alkyl or alkenyl each having from 2 to 20, preferably 2 to 10, carbon atoms, aryl, preferably phenyl or aralkyl, preferably benzyl, and X is hydrogen, an alkali metal, alkaline earth metal, ammonium, alkylammonium or polyalkylenepolyammonium ion, preferably a sodium, potassium or ammonium ion, a process for their manufacture and their use as collector in the flotation of non-sulfidic ores.
    Type: Grant
    Filed: July 14, 1982
    Date of Patent: May 22, 1984
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Hans-Joachim Morawietz, Erich Hoffman, Johann Hanauer, Kurt Bauer