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:
Oct. 12, 1976
Filed:
Mar. 25, 1975
Kozo Saitoh, Tokyo, JA;
Sumio Izumi, Sayama, JA;
Mitsui Mining & Smelting Co., Ltd., Tokyo, JA;
Abstract
A method for separating a plastics-containing mixture comprising a lead alloy, a polyolefin, a polystyrene and ebonite, which comprises (1) separating the lead alloy from the mixture in a running liquid, with the lead alloy being recovered as a residue; (2) placing the resulting plastics mixture comprising the polyolefin, polystyrene and ebonite in a separation cell containing an aqueous liquid medium in the presence of a wetting agent; (3) introducing gas bubbles into the cell thereby to cause the gas bubbles to selectively adhere to the surface of the polyolefin and float the polyolefin, with the polyolefin being recovered as a float; (4) adding a flotation agent into the cell containing the resulting plastics mixture comprising the polystyrene and ebonite; and (5) introducing gas bubbbles into the cell thereby to cause the gas bubbles to selectively adhere to the surface of the polystyrene and float the polystyrene, with the polystyrene being recovered as a float and the ebonite being recovered as a residue.