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:
Mar. 26, 1996
Filed:
Jan. 06, 1995
Applicant:
Inventors:
Jean-Francois Joly, Paris, FR;
Eric Benazzi, Montesson, FR;
Fre/ de/ Chaigne, Valence, FR;
Jean-Yves Bernhard, Mennecy, FR;
Jean-Charles Viltard, Valence, FR;
Assignee:
Institut Francais Du Petrole, Rueil Malmaison, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B / ; C01B / ;
U.S. Cl.
CPC ...
423531 ; 423525 ;
Abstract
The invention concerns a process for purifying sulphuric acid, particularly after it has acted as a catalyst in aliphatic alkylation reactions. It is characterized in that the sulphuric acid is impregnated into a porous organic or inorganic support, for example silica, and is then calcined at least once to eliminate organic hydrocarbon substances which the sulphuric acid may contain.