Patent ID: 6020210
Filing Date: 2000-02-01
Classification: B03C,G01N,Y10S

Abstract:
A mechanically stiff coated columnar matrix for locally intensifying a magnetic gradient in a separation chamber of an HGMS apparatus in the conduct of HGMS (High Gradient Magnetic Separation), said separation chamber comprising a separation vessel, said columnar matrix comprising magnetizable particles comprising surfaces and interstices which let liquid pass and said columnar matrix being magnetized in the presence of a magnetic field;said matrix having been coated in a preparation vessel using a method comprising:treating said magnetizable particles with a coat-forming liquid preparation in the preparation vessel, thereby covering said surfaces of said magnetizable particles, which preparation comprises a monomer capable of forming a polymer or a prepolymerized polymer;removing excess coat-forming liquid from said magnetizable particles; andeffecting the formation of a solid polymer coating of said magnetizable particles to form said columnar matrix, said solid polymer coating being essentially impermeable to ions and comprising less than 10 percent water by weight based on a total weight of said coating; andtransferring said columnar matrix from said preparation vessel to said separation chamber of said apparatus.