Method and a system for separating and treating impurities from a hydrogen chloride liquid mixture

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United States of America

PATENT NO 11267703
APP PUB NO 20190194018A1
SERIAL NO

16312358

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Abstract

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The present invention relates to a method and a system for separating and treating impurities from a hydrogen chloride liquid mixture from the process for preparing isocyanate with phosgenation including sending hydrogen chloride liquid mixture into a gas-liquid separation column for separation to yield a liquid phase flow with impurities at the bottom of the gas-liquid separation column, neutralizing the liquid phase flow comprising impurities with an alkaline liquid in the neutralization tank to yield a neutralized solution, and sending the neutralized solution into a waste liquid treatment device from said neutralization tank for treatment.

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Patent Owner(s)

Patent OwnerAddress
COVESTRO DEUTSCHLAND AGKAISER-WILHELM-ALLEE 60 LEVERKUSEN 51373

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bittner, Jürgen - 2 2
Fink, Henrike Meerbusch, DE 1 0
Hellmich, Rainer Cologne, DE 1 0
Jakobs, Eric Krefeld, DE 2 3
Lehner, Peter Mühlheim an der Ruhr, DE 22 88
Qian, Micky Shanghai, CN 1 0
Rittermeier, Andre Leverkusen, DE 6 0
Soppe, Alfred Issum, DE 14 31
Steffens, Friedhelm Leverkusen, DE 44 236
Wu, Luyan Shanghai, CN 1 0

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