On-line analysis of process gas during the production of ketene

Details On-line analysis of process gas during the production of ketene On-line analysis of process gas during the production of ketene

G - Physics

01

N

G01N 1/22 (2006.01) G01N 33/00 (2006.01) G01N 1/24 (2006.01)

Patent

CA 2299248

A process is disclosed for the on-line analysis of a reactive gas mixture in a container, in particular a gas mixture containing ketene, diketene, acetic acid anhydride and/or acetic acid. The process is characterised in that part of the gas mixture is temporarily expanded in a sampling pipe and subjected to a mass spectrometric analysis through a probe integrated into the container and having an opening with a free cross-section smaller than or equal to 1 mm2.

L'invention concerne un procédé d'analyse en ligne d'un mélange gazeux réactif, notamment d'un mélange gazeux placé dans un récipient et contenant du cétène et/ou du dicétène et/ou de l'anhydride d'acide acétique et/ou de l'acide acétique. Ce procédé se caractérise en ce qu'une partie du mélange gazeux est détendu momentanément dans une conduite d'échantillonnage par l'intermédiaire d'une sonde intégrée dans le récipient et comportant un orifice dont la section transversale libre est inférieure ou égale à 1 mm?2¿, avant de subir une analyse spectrométrique de masse.

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