Patents by Inventor Per Gunnar Broman

Per Gunnar Broman 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).

  • Flotation process of lead-, copper-, uranium- and rare earth minerals
    Patent number: 4070276
    Abstract: A process and flotation agents are provided for flotation of lead-, uranium-, and rare earth-type minerals and ores in which an aqueous pulp of the mineral or ore is subjected to a froth flotation, characterized in that the flotation is performed in the presence of a tertiary amine flotation agent having the general formula: ##STR1## wherein: R is a aliphatic hydrocarbon group having from about six to about twenty four carbon atoms;A is an oxyalkylene group having from about two to about four carbon atoms;X is selected from the group consisting of hydrogen and hydroxyl;m is a number within the range from 0 to about 10;n .sub.1 is a number within the range from 1 to about 4;n .sub.2 is 1, 2 or 3;x is a number within the range from 0 to about 4;y is 0 or 1;The sum of m + y being within the range from 1 to about 11; and salts thereof.The process is especially applicable in the flotation of sulphide and oxide ores and minerals.
    Type: Grant
    Filed: January 9, 1976
    Date of Patent: January 24, 1978
    Assignee: Berol Kemi AB
    Inventors: Per Gunnar Broman, Per Gudmar Kihlstedt, Carl Du Rietz