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:
Aug. 30, 1977
Filed:
Mar. 10, 1976
Ben E Adams, Hanford, CA (US);
Edward J Gidak, Jr, Carlsbad, NM (US);
Duval Corporation, Houston, TX (US);
Abstract
Langbeinite and kieserite are beneficiated in a flotation process in which separation of ore particles is conducted in a froth flotation process with a magnesium chloride brine containing at least 20 moles MgCl.sub.2 per 1000 mols H.sub.2 O. Said brine is maintained at a pH below about 3.5. The preferred flotation agent is a combination of a fatty acid amine (preferably tallow amine) and an organic acid, either oleic or sebacic acid, in an approximate ratio of 2 to 4 parts amine to 1 part oleic or sebacic acid, and preferably in an amine-oleic or amine-sebacic acid ratio of about 3:1. Flotation is preferably conducted in two stages wherein the sink product from the rougher flotation contains langbeinite above about 95% concentration which is relatively free of kieserite and the froth from the rougher flotation is passed to a second 'cleaner' flotation step where the kieserite is further concentrated to above about 75% kieserite. The sink product from the cleaner flotation is recycled to the rougher flotation step for further processing with the pulp containing the incoming ore particles.