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:
Jan. 19, 1988
Filed:
Jul. 05, 1985
Stephen N Vaugh, Webster, TX (US);
Robert Lang, Baytown, TX (US);
Exxon Research and Engineering Company, Florham Park, NJ (US);
Abstract
A process for gasifying a non-gaseous solid material wherein a portion of the gasification is accomplished in the presence of steam and another portion of the gasification is accomplished in the presence of hydrogen and in the substantial absence of carbon dioxide and steam. The gasification will be accomplished at an elevated temperature and pressure. The essence of the invention resides in the discovery that carbon alkali metal catalyst, generally used for the gasification of carbonaceous materials, will deactivate in the presence of carbon dioxide, especially if the alkali metal carbonate is stable at gasification conditions and in the discovery that this deactivation can be either significantly reduced if the initial portion of the gasification is completed in the presence of hydrogen and in the substantial absence of steam and carbon dioxide or if after the catalyst has become partially deactivated, the activity is restored by completing a portion of the gasification in the presence of hydrogen and in the substantial absence of steam and carbon dioxide.