US PATENT SUBCLASS 423 / 450
.~.~.~ Directly from fluid hydrocarbon only

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

Internet Version by PATENTEC © 1999      Terms of Use


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.~.~.~ Directly from fluid hydrocarbon only {6}
451  DF  .~.~.~.~> Rapid and discontinuous oxidation
452  DF  .~.~.~.~> Including flame impinging on cool surface
453  DF  .~.~.~.~> By contacting with catalyst or hot solid surface {1}
455  DF  .~.~.~.~> Specified injection velocity
456  DF  .~.~.~.~> Specified injection angle (e.g., helical, tangential, etc.) {1}
458  DF  .~.~.~.~> Gas or vapor only as infeed to process

DEFINITION

Classification: 423/450

(under subclass 449.1) Processes wherein the carbon is made from the direct pyrolysis, cracking or decomposition of a compound containing only carbon and hydrogen (i.e., hydrocarbon) which is normally in the liquid or gaseous

state.

(1) Note. Any "oil" or any "gas" (e.g., natural) is considered to qualify under this definition of hydrocarbon unless it is clear from the disclosure that an element other than carbon and hydrogen is present in the gas or oil. However, impurities in the fluid are disregarded if they are not the source for the carbon.

SEE OR SEARCH THIS CLASS, SUBCLASS:

449, for a process which uses a halogen containing compound, e.g., CHC13. as the feed stock for carbon black.