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:
Jun. 04, 1985
Filed:
Dec. 27, 1982
Michael C Chervenak, Pennington, NJ (US);
Richard M Eccles, Princeton, NJ (US);
Govanon Nongbri, Newtown, PA (US);
HRI, Inc., Gibbsboro, NJ (US);
Abstract
A process for high hydroconversion of petroleum residua containing at least about 25 V % material boiling above 975.degree. F. to produce lower boiling hydrocarbon liquid products and avoid undesirable precipitation of asphaltene compounds. In the process, the feedstock is at least about 80 percent catalytically hydroconverted to material boiling below 975.degree. F. and containing a mixture of gas and liquid fractions, after which the gas fraction is removed while maintaining the resulting liquid fractions temperature above about 730.degree. F. to avoid precipitation of asphaltene compounds which causes operations difficulties in the downstream equipment. Alternatively, the pressure-reduced liquid fraction can be stripped of material boiling below about 650.degree. F. before cooling the liquid to a temperature below about 730.degree. F. to prevent such precipitation of asphaltene compounds in the downstream equipment. The resulting liquid fraction is distilled to produce hydrocarbon liquid products, and a vacuum bottoms fraction is recycled to the catalytic reaction step to obtain increased percent conversion to lower boiling liquid products.