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. 09, 1982
Filed:
Apr. 29, 1980
Yukio Nakako, Takarazuka, JP;
Toshio Ohzawa, Kobe, JP;
Shizuo Yokota, Nishinomiya, JP;
Masaaki Tamura, Kobe, JP;
Kobe Steel, Ltd., Kobe, JP;
Abstract
Improvements in a process for reforming coal by subjecting a mixed slurry containing a hydrocarbon solvent and coal fines to hydrogenation reaction under high temperature and pressure conditions, gas-liquid separation, and distillation to obtain a solvent-refined coal, the improvements comprising: maintaining the reaction temperature and total reaction pressure within a hydrogenation reactor at 400.degree. to 500.degree. C. and 50 to 200 atms., and controlling the residence time distribution of reactants, excepting gaseous reactants, in the hydrogenation reaction zone to have an average residence time longer than 17 minutes, and to keep the quantity of the reactants which have a residence time shorter than 10 minutes in a proportion less than 20% by weight of the reactants.