Mineral oils: processes and products – Refining
Patent
1978-03-20
1980-10-14
Crasanakis, George
Mineral oils: processes and products
Refining
C10G 2120, C10G 2116, C10G 2114
Patent
active
042279941
ABSTRACT:
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. Resumption of continuous operation is effected by returning the solvent to its former flow path in the apparatus when the flow of feed is restored.
REFERENCES:
patent: 3075912 (1963-01-01), DuBois-Eastman et al.
patent: 4070268 (1978-01-01), Davis et al.
patent: 4077866 (1978-03-01), Owen et al.
patent: 4134821 (1979-01-01), Gorin
Knebel Alfred H.
Rhodes Donald E.
Addison William G.
Crasanakis George
Kerr-McGee Corporation
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