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:
Feb. 28, 1984
Filed:
Jun. 01, 1982
Gopal H Singhal, Houston, TX (US);
Ramachandra A Nadkarni, Baytown, TX (US);
Exxon Research and Engineering Co., Florham Park, NJ (US);
Abstract
Metal constituents are recovered from the heavy bottoms produced during the liquefaction of coal and similar carbonaceous solids in the presence of a catalyst containing metal constituents by reducing the carbonaceous content of the heavy bottoms, contacting the resultant heavy bottoms deficient in carbonaceous material with an aqueous solution of a mineral acid in the presence of an added alcohol and an added oxidizing agent to extract the metal constituent from the insoluble catalyst residues into the aqueous solution, and using the metal constituents extracted as constituents of the catalyst. Preferably, the metal constituent comprising the catalyst is molybdenum, the mineral acid is sulphuric acid, hydrochloric acid or phosphoric acid, the oxidizing agent is hydrogen peroxide and the alcohol is methanol. In a preferred embodiment of the invention, the carbonaceous content of the heavy bottoms is reduced by subjecting the heavy bottoms to a solvent extraction at elevated temperature and pressure with a hydrocarbon solvent in the presence of molecular hydrogen.