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:
Nov. 03, 1992
Filed:
Dec. 01, 1989
Yukio Sugawara, Iwaki, JP;
Mineo Hayashi, Ote, JP;
Junji Konishi, Tokyo, JP;
Shosaku Hayashi, Iwaki, JP;
Mitsubishi Materials Corporation, Tokyo, JP;
Onahama Smelting and Refining Company, Ltd., Tokyo, JP;
Abstract
An improved process for recovering tellurium from copper electrolysis slime. The process comprises leaching copper and tellurium from said slime with sulfuric acid and recovering tellurium from the solution after leaching (called 'leach') by suspending at least one copper electrode plate in a bath of a leach, allowing tellurium to deposit on the surface thereof as copper telluride, agitating the bath as required so as to remove the copper telluride formed on the surface of the copper plates and allow it to settle, collecting the copper telluride precipitate and obtaining tellurium by means known per se. A high grade copper tellurium precipitate is obtained.