C - Chemistry – Metallurgy – 01 – B
Patent
C - Chemistry, Metallurgy
01
B
C01B 17/88 (2006.01)
Patent
CA 2268414
The present invention pertains to a method for upgrading used sulfuric acids, especially those which are produced during hydrocarbon nitration using nitric acid in the presence of sulfuric acid. The upgrading is achieved by a multistage process.
La présente invention concerne un procédé de reconcentration d'acides sulfuriques usés, notamment d'acides sulfuriques qui s'accumulent lors de nitratation d'hydrocarbures avec de l'acide nitrique en présence d'acide sulfurique, la reconcentration étant effectuée en une ou plusieurs étapes.
Beckhaus Heiko
Lorenz Wolfgang
Munnig Jurgen
Schumacher Karl
Aktiengesellschaft Bayer
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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