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:
Jun. 14, 1977
Filed:
Apr. 20, 1976
Joseph Redmond Farnand, Ottawa, CA;
Ira Edwin Puddington, Ottawa, CA;
Canadian Patents and Development Limited, Ottawa, CA;
Abstract
A process for removing mineral matter from a solubilized coal slurry while retaining the asphaltenes with the coal solution in which the slurry is agitated with an alkanolamine or other hydrophilic agglomerating agent in the presence of an aromatic solvent or a polyvinyl alcohol, to form relatively large agglomerates which contain substantially all of the mineral matter, the undissolved coal, the agglomerating agent and some entrained coal solution and which can be separated rapidly from the coal solution by gravity settling. The agglomerates can then be washed with a solvent to recover entrained coal solution, which can in turn be distilled to recover solvent, a high boiling coal solution and agglomerating agent for recycling.