METHOD FOR CLEANING A WASTE GAS FROM A METAL REDUCTION PROCESS

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United States of America Patent

SERIAL NO

14770063

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Abstract

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Gaseous perfluorocarbons in a waste gas are adsorbed by an adsorption device. Subsequently a decomposition of the perfluorocarbons takes place with formation of hydrogen fluoride. The hydrogen fluoride is converted with an oxide of a metal to be reduced, to the metal fluoride thereof. The metal fluoride formed is then fed again to the reduction process.

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Patent Owner(s)

Patent OwnerAddress
SIEMENS AKTIENGESELLSCHAFTWITTELSBACHER PLATZ 2 D-80333 MUNCHEN

International Classification(s)

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  • 2015 Application Filing Year
  • B01J Class
  • 3259 Applications Filed
  • 2459 Patents Issued To-Date
  • 75.46 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances201520162017201820192020202120222023202420250255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
FRIEDRICH, Bernd Aachen, DE 10 169
HANEBUTH, Marc Nuremburg, DE 33 38
TREMEL, Alexander Erlangen, DE 38 36
VOGEL, Hanno Monheim, DE 4 2

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  • 2 Citation Count
  • B01J Class
  • 27.48 % this patent is cited more than
  • 8 Age
Citation count rangeNumber of patents cited in rangeNumber of patents cited in various citation count ranges391907822692311101 - 1011 - 2021 - 3031 - 4041 - 5051 - 6061 - 7071 - 80100 +0501001502002503003504004505005506006507007508008509009501000

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