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:
Sep. 28, 1993
Filed:
Sep. 11, 1992
Applicant:
Inventors:
Vincenzo Calemma, San Donato Milanese, IT;
Vincenzo Piccolo, Paullo, IT;
Riccardo Rausa, San Donato Milanese, IT;
Assignee:
Eniricerche S.p.A., Milan, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
562475 ; 562465 ; 562478 ; 568761 ;
Abstract
Process for preparing regenerated humic acids from coal by means of the continuous oxidation on fluidized bed, characterized in that a coal of lignite, sub-bituminous or bituminous type is submitted to a preliminary oxidation under mild conditions in order to reduce the hydrogen content of said coal by an amount of 5 to 25% of hydrogen initially present in the starting coal, and that the resulting coal is subsequently submitted to an oxidation in order to produce the desired humic acids.