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. 28, 1985
Filed:
Aug. 17, 1984
David G Walker, Baytown, TX (US);
Other;
Abstract
A carbon-containing solid (such as oil shale or tar sand) is treated with air in a six-stage vertical shaft to make producer gas, oil and a pure carbon as products. The top and bottom stages of the vertical shaft are fed to pre-heat incoming solid and to scavenge sensible heat from the processed solid. One stage is a direct retort and makes a gas stream which is a mixture of producer gas and oil. Another stage is a gas producer which converts fixed carbon on the solid to carbon monoxide by reaction with air and carbon dioxide. A fifth stage preheats incoming air. The sixth stage cools and purifies hot carbon monoxide-rich producer gas. The oil and producer gas products are made by direct retorting of the solid with air followed by a separation step. The pure carbon product is made by separating pure carbon monoxide from the carbon monoxide-rich producer gas followed by reacting the carbon monoxide to carbon dioxide and the pure carbon product.