Alfred Henry Knebel

42279941, Oct 14, 1980

Mar 20, 1978

5/887870

Alfred H. Knebel - Oklahoma City OK
Donald E. Rhodes - Oklahoma City OK

Kerr-McGee Corporation - Oklahoma City OK

C10G 2120
C10G 2116
C10G 2114

208177

A process for maintaining the fluid-like properties of separate phases formed within a continuous coal deashing process during periods in which the flow of feed to the apparatus is interrupted. In operation, when the flow of feed is interrupted, the flow of solvent to the separation apparatus of the coal deashing process is diverted about said apparatus in such a manner as to maintain the system operating pressure. More specifically, solvent maintained at elevated temperature and pressure is diverted about the mixing and separation apparatus and introduced into a conduit downstream of the separation zone, in advance of a pressure regulating valve, said conduit also connecting to the separation apparatus. The new flow path maintains the pressure within the separation zone through establishment of fluid communication between the elevated pressure solvent and the phases within the separation apparatus. In one embodiment, a heating fluid is circulated through heating jackets surrounded said separating apparatus to maintain the system operating temperature.

42486920, Feb 3, 1981

Aug 29, 1979

6/070563

Alfred H. Knebel - Oklahoma City OK
Donald E. Rhodes - Oklahoma City OK

Kerr-McGee Chemical Corporation - Oklahoma City OK

C10G 100
C10G 912
C10G 700

208 8LE

A process for removing an agglomerate of accumulated materials including ash concentrate which collects within the first heavy phase withdrawal conduit of a coal deashing system employing solvent at elevated temperatures and pressures near the critical temperature of the solvent. A carrier fluid is introduced into the first heavy phase withdrawal conduit simultaneously with or after pressure reduction of the heavy phase under conditions such that a turbulent flow profile is developed within the withdrawal conduit which results in the removal of at least a substantial portion of any accumulated materials within the withdrawal conduit.