04075083 is referenced by 4 patents and cites 5 patents.

A method of retorting oil shale which comprises the steps of passing the material in particulate form downwardly as a continuous vertical column of solid material successively through a preheating zone, a distillation zone, a combustion zone, and a residue cooling zone. An improved method of product oil recovery is disclosed whereby the vapor product is subjected to sequential treatment with cyclone separators and an absorption column, with a portion of the resulting noncondensible gases being recycled to the retort.

Title
Method for destructive distillation of hydrocarbonaceous materials
Application Number
5/695061
Publication Number
4075083
Application Date
June 11, 1976
Publication Date
February 21, 1978
Inventor
Maurice W Putman
8346 E. Valley Vista, Scottsdale, 85253
AZ, US
Agent
Herbert E Haynes Jr
IPC
C10G 1/02
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