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. 03, 1996
Filed:
Oct. 13, 1994
Applicant:
Inventors:
Zadson d Franco, Aracaju, BR;
Carlos N Khalil, Governador, BR;
Oswaldo d Pereira, Jr, Jaearepagua, BR;
Assignee:
Petroleo Brasileiro S.A. - Petrobras, Rio de Janeiro, BR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B08B / ; B08B / ; C23G / ; F23J / ;
U.S. Cl.
CPC ...
134-5 ; 134 19 ; 134 20 ; 134 221 ; 134 2211 ; 134 2212 ; 134 2213 ; 134 2214 ; 134 2216 ; 134 2217 ; 134 2218 ; 134 2219 ; 134 26 ; 134 28 ; 134 29 ; 134 34 ; 134 35 ; 134 36 ; 134 40 ;
Abstract
A process for the thermo-chemical cleaning of storage tanks which contain sludges from petroleum oil or related products. The process is carried out by the combined action of an organic solvent and the generation of nitrogen gas and heat, whereby produced heating in situ, agitation by turbulence and flotation of the fluidized sludge, which after being collected and transferred to tanks or desalting units can be reintroduced in the usual refining flow.