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:
Dec. 16, 1986
Filed:
Jul. 16, 1985
Yoshiyuki Imagire, Musashino, JP;
Teruhiko Hirabayashi, Tokyo, JP;
Nobuo Nonaka, Tokorozawa, JP;
Toshifumi Kitagawa, Kawaguchi, JP;
Yasukazu Murakami, Matsudo, JP;
Iwao Abe, Ohtake, JP;
Shinzo Uda, Ohtake, JP;
Osamu Ohshima, Yamaguchi, JP;
Etsuo Takemoto, Ohnomachi, JP;
Daicel Chemical Industries, Ltd., Osaka, JP;
Abstract
The present invention provides a process for recovering a tungsten compound from a waste liquor containing a high-boiling organic compound and the tungsten compound, which process comprises the steps of spray-burning said waste liquor at an air ratio of 1.05 or higher under conditions of a temperature and a residence time which lie within the region of a pentagon defined by points A, B, C, D, and E in FIG. 1; quenching the combustion product by immediately bringing it into direct contact with water; and recovering the tungsten compound.