US PATENT SUBCLASS 208 / 172
.~.~.~ Preheating or quenching with solids


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}
172.~.~.~ Preheating or quenching with solids


DEFINITION

Classification: 208/172

(under subclass 165) Processes wherein (1) the heated solids, are employed to heat the fluid prior to entry to the gravitating bed or (2) cool solids are employed to extract and/or recover heat from the effluent from the gravitating bed zone.

(1) Note. This subclass contains, for example, processes of maintaining a better thermal balance in the system by use of the solids to preheat the feed or cool the products. Undesirable side reactions may be prevented by quickly cooling the products below reaction temperatures.

SEE OR SEARCH CLASS

165, Heat Exchange,

104.11+, for a heat exchange system in which a recycling intermediate fluent material receives and discharges heat.