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. 06, 1984
Filed:
Sep. 09, 1982
Toyo Engineering Corporation, Tokyo, JP;
Abstract
In a method of treating heavy oil, in which a gas and a volatile oil fraction produced by thermally decomposing petroleum heavy oil are distilled off, a thermal decomposition residue withdrawn in the liquid state is brought into contact with a part of the volatile oil fraction as a solvent to extract the solven-soluble component in the thermal decomposition residue, and then an extraction residue is separated as solid particles from the solvent, an improvement is disclosed which comprises fractionating the volatile oil fraction used as the solvent into two or more sub-fractions having different boiling points from each other on condensing the volatile oil fraction in a fractionating column, and contacting the sub-fractions thus-fractionated with the thermal decomposition residue progressively from the highest boiling to the lowest boiling of the fractions to extract a solvent-soluble component.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile