04652342 is referenced by 7 patents and cites 30 patents.

A process for the destructive distillation of hydrocarbonaceous solids in a retort, wherein a viscous bridging zone comprising viscous liquids in intimate contact with solids, which tends to impede the flow of vaporized hydrocarbons and the flow of solid particles, is agitated by reciprocating mechanical means actuated by a rotatable crankshaft.

Title
Retorting process using an anti-bridging mechanical agitator
Application Number
608846
Publication Number
4652342
Application Date
July 1, 1985
Publication Date
March 24, 1987
Inventor
Richard D Kuerston
Bartlesville
OK, US
Agent
French and Doescher
Assignee
Phillips Petroleum Company
OK, US
IPC
C10B 49/06
C10B 47/18
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