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:
May. 04, 1976
Filed:
Mar. 24, 1975
Applicant:
Inventor:
Franklin D Hoffert, Mountainside, NJ (US);
Assignee:
Hydrocarbon Research, Inc., Morristown, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F26B / ;
U.S. Cl.
CPC ...
34-9 ; 34 17 ;
Abstract
Drying coal having undesirably high moisture content is accomplished by heating the particulate coal in an oil slurry contained in a pressurized drying zone to sufficient temperature to evaporate the moisture. A major portion of the heat required in the drying zone is provided by compressing the hot steam evolved from the coal drying step and condensing it in a heat exchanger passage in the drying zone. The resulting dried coal-oil slurry liquid is then passed on to further processing such as coal hydrogenation or liquefaction steps.