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:
Apr. 06, 1999
Filed:
Jul. 25, 1997
Applicant:
Inventors:
Carlos Nagib Khalil, Rio de Janeiro, BR;
Lucia Cristina Leite, Rio de Janeiro, BR;
Nelson De Rocha, Rio de Janeiro, BR;
Assignee:
Petroleo Brasileiro S.A.-Petrobras, Rio De Janeiro, BR;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B08B / ; B08B / ;
U.S. Cl.
CPC ...
134 2211 ; 134 2213 ; 134 2214 ; 134 40 ; 166310 ;
Abstract
An on-line, thermo-chemical process for the dewaxing of oil export pipelines with the aid of a Nitrogen Generating System is described, wherein the treating fluid to be employed as dewaxing fluid comprises: a) a solution of nitrogen salts activated by emulsified acetic acid and designed to yield nitrogen and heat, and b) a solvent, which is the petroleum oil being produced. The dewaxing treatment is effected at the same time as the petroleum oil is produced, this leading to great savings in costs and energy.