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:
Dec. 04, 1979
Filed:
Mar. 20, 1978
Donald E Rhodes, Oklahoma City, OK (US);
Kerr-McGee Corporation, Oklahoma City, OK (US);
Abstract
A process for improving the yield of soluble coal products separated from a residuum feed in a coal deashing process. In operation, an additive comprising (i) at least a portion of a distillate fraction preferably recovered from the coal liquefaction products from which the residuum feed is derived, (ii) a portion of recycled heavy soluble coal products, (iii) a portion of recycled light soluble coal products, or (iv) admixtures thereof is introduced in predetermined quantities into the residuum feed prior to entry into a separation zone maintained at elevated temperature and pressure to effect an improved separation of the soluble coal products from the insoluble coal products within the residuum feed.