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:
Jan. 16, 2001
Filed:
Feb. 20, 1998
Rudolph Pruszko, Green River, WY (US);
Roland Schmidt, Lakewood, CO (US);
Dale Lee Denham, Jr., Arvada, CO (US);
Environmental Projects, Inc., Casper, WY (US);
Abstract
Processes for purification of saline minerals using magnetic separation are disclosed. In particular, saline minerals can include trona, borates, potash, sulfates, nitrates and chlorides. The magnetic separation can include high intensity magnetic separation which can be conducted at greater than about 20,000 Gauss and up to greater than about 50,000 Gauss. Other embodiments of the invention include calcination of a saline mineral in an inert atmosphere or in an oxygen-containing atmosphere at a high temperature prior to magnetic separation. A further embodiment of the invention includes pre-alignment of particles on a surface to align the particles of high magnetic force during a magnetic separation step. Also disclosed are various embodiments of magnetic separation which include subjecting an ore to a preliminary magnetic field prior to magnetic separation.