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:
Aug. 25, 1981
Filed:
Aug. 29, 1977
Applicant:
Inventors:
Haruichi Hara, Toyonaka, JP;
Toshihide Kanzaki, Takatsuki, JP;
Hisanao Motomuro, Suita, JP;
Akiyoshi Adachi, Suita, JP;
Assignee:
Nippon Shokubai Kagaku Kogyo Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B / ; C01B / ; B01J / ; B01J / ;
U.S. Cl.
CPC ...
423535 ; 252440 ; 252456 ; 423522 ;
Abstract
A process for the production of sulfuric acid for using a gas containing sulfur dioxide in a high concentration which comprises using a catalyst consisting of vanadium pentoxide as a main catalytic component, potassium sulfate as a promotor and a diatomaceous earth carrier, wherein a ratio of K.sub.2 O(mol)/V.sub.2 O.sub.5 (mol) is 3.8 to 5.5, V.sub.2 O.sub.5 content is 5.5 to 7.5% by weight and sum of a value of said ratio and the V.sub.2 O.sub.5 content (% by weight) is 9.3 to 11.