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:
Jul. 08, 1980
Filed:
Jul. 10, 1978
Herbert Bierbach, Frankfurt am Main, DE;
Rudolf Kohlen, Wehrheim, DE;
Carl Hafke, Frankfurt am Main, DE;
Metallgesellschaft Aktiengesellschaft, Frankfurt am Main, DE;
Abstract
A process of producing a gas of high calorific value and low dust content comprising contacting coal with water vapor and free oxygen at a pressure of about 5 to 150 bars and a temperature sufficient to produce a gas containing hydrogen and carbon monoxide, containing at least about 10 grams of dust per standard cubic meter and having a temperature of about 350.degree. to 800.degree. C., subjecting the gas to a coarse purification to reduce the solids content thereof, then scrubbing the gas at about 200.degree. to 300.degree. C. with a liquid predominantly comprising hydrocarbons and including less than about 5% of water by weight, and withdrawing a purified gas substantially free of solids and having an enhanced calorific value. In accordance with preferred features, the coarse purification stage includes at least one cyclone separator, the gas leaves the coarse purification stage at a temperature above about 350.degree. C. and is cooled by spraying with water to below 350.degree. C. before entering the intense scrubbing stage.