US PATENT SUBCLASS 208 / 174
.~.~.~.~ By pneumatic lifting

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


208 /   HD   MINERAL OILS: PROCESSES AND PRODUCTS

46  DF  CHEMICAL CONVERSION OF HYDROCARBONS {11}
146  DF  .~ Solids contacting and mixing {8}
165  DF  .~.~ Gravitating compact beds {7}
173  DF  .~.~.~ Solids transferring {1}
174.~.~.~.~ By pneumatic lifting {1}
175  DF  .~.~.~.~.~> Compact type

DEFINITION

Classification: 208/174

(under subclass 173) Processes wherein solids are taken from the discharge end of one gravitating compact bed and transferred to a more elevated inlet of another bed by entraining or suspending the solids gas stream.

SEE OR SEARCH THIS CLASS, SUBCLASS:

148, for contacting processes wherein there are combined gravitating and suspension zones. Thus if a reaction occurs in the dispersed lift step (either a mineral oil conversion or a regeneration, stripping, etc., of the solids) the process is a combined gravitating bed and suspension zone process classified in subclass 148, whereas if the lift gas is used for transfer purpose only, the process is classified in this subclass (174).

SEE OR SEARCH CLASS

406, Conveyors: Fluid Current,

141+, and 174 for pneumatic lifting apparatus with no treating claimed.