The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 20, 1983
Filed:
Dec. 31, 1981
Applicant:
Inventors:
Pierre Blazy, Nancy, FR;
Robert Houot, Villers les Nancy, FR;
Robert Joussemet, Mazerulles, FR;
Philippe Haicour, Paris, FR;
Jean Tracez, Sceaux, FR;
Assignee:
Ceca S.A., Velizy Villacoublay, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B03D / ;
U.S. Cl.
CPC ...
209166 ; 209167 ; 252 61 ;
Abstract
The present invention relates to an enrichment process, by flotation, of sedimentary ores containing phosphate, and comprising a gangue of the carbonated type and in some cases a gangue of the siliceous type, wherein an amphoteric product of formula ##STR1## is at least used as collecting agent, in which formula: R is of form R.sub.1 or R.sub.1 O--, R.sub.1 being a saturated or unsaturated alkyl radical, either linear or branched, and comprising between 5 and 19 carbon atoms.