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:
Sep. 13, 2005
Filed:
Aug. 09, 2002
Shuichi Kanno, Hitachi, JP;
Toshiaki Arato, Hitachinaka, JP;
Shinzo Ikeda, Ibaraki-ken, JP;
Ken Yasuda, Tokyo, JP;
Hisao Yamashita, Hitachi, JP;
Shigeru Azuhata, Hitachi, JP;
Shin Tamata, Ibaraki-ken, JP;
Kazuyoshi Irie, Hitachi, JP;
Shuichi Kanno, Hitachi, JP;
Toshiaki Arato, Hitachinaka, JP;
Shinzo Ikeda, Ibaraki-ken, JP;
Ken Yasuda, Tokyo, JP;
Hisao Yamashita, Hitachi, JP;
Shigeru Azuhata, Hitachi, JP;
Shin Tamata, Ibaraki-ken, JP;
Kazuyoshi Irie, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A gas stream containing at least one fluorine compound selected from the group consisting of compounds of carbon and fluorine, compounds of carbon, hydrogen and fluorine, compounds of sulfur and fluorine, compounds of nitrogen and fluorine and compounds of carbon, hydrogen, oxygen and fluorine is contacted with a catalyst comprising at least one of alumina, titania, zirconia and silica, preferably a catalyst comprising alumina and at least one of nickel oxide, zinc oxide and titania in the presence of steam, thereby hydrolyzing the fluorine compound at a relatively low temperature, e.g. 200°-800° C., to convert the fluorine of the fluorine compound to hydrogen fluoride.