US PATENT SUBCLASS 423 / 453
.~.~.~.~ By contacting with catalyst or hot solid surface

Current as of: June, 1999
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423 /   HD   CHEMISTRY OF INORGANIC COMPOUNDS

414  DF  CARBON OR COMPOUND THEREOF {3}
445 R  DF  .~ Elemental carbon {7}
449.1  DF  .~.~ Carbon black (e.g., lampblack) {6}
450  DF  .~.~.~ Directly from fluid hydrocarbon only {6}
453.~.~.~.~ By contacting with catalyst or hot solid surface {1}
454  DF  .~.~.~.~.~> Hot particulate bed or reaction zone lining or refactory

DEFINITION

Classification: 423/453

(under subclass 450) Processes in which the decomposition takes place on contact between the hydrocarbon and (1) catalytic material or (2) a solid surface heated to a temperature at which the pyrolysis can occur.