US PATENT SUBCLASS 208 / 410
.~.~.~ Using solid heat carrier

Current as of: June, 1999
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208 /   HD   MINERAL OILS: PROCESSES AND PRODUCTS

400  DF  BY TREATMENT OF SOLID MINERAL, E.G., COAL LIQUEFACTION, ETC. {13}
407  DF  .~ Specified agitation or circulation in gas contact zone {3}
409  DF  .~.~ Vertical gas upflow, e.g., fluidization, etc. {1}
410.~.~.~ Using solid heat carrier

DEFINITION

Classification: 208/410

Using solid heat carrier:

(under subclass 409) Subject matter in which a solid material is used to provide heat to the feed or to an intermediate in the process by direct contact.

(1) Note. The solid material may be catalytic or inert, insofar as it provides direct contact heat.

(2) Note. The mere burning of a solid material is usually not sufficient for classification in this subclass unless it comes into direct contact with the feedstock to be heated.

(3) Note. The heat carrier may comprise solids produced in the process which are removed from a feedstock treatment zone and recycled to the same zone, with or without an intermediate increase in the heat content of the solids.