Method for minimizing hydrogen halide corrosion in a partial...

C - Chemistry – Metallurgy – 10 – K

Patent

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Details

C10K 1/12 (2006.01) C01B 3/36 (2006.01) C01B 3/52 (2006.01) C01B 9/00 (2006.01) C01D 3/00 (2006.01)

Patent

CA 2259899

The present invention relates to a method for minimizing hydrogen halide corrosion in quench gasifier during the non-catalytic partial oxidation reaction of a halogen-containing hydrocarbonaceous feed, to produce a hydrogen halide-containing synthesis gas, finely divided particulate solids, and a nontoxic slag. The hydrogen halide-containing synthesis gas is contacted with water in the quench zone (14) of the gasifier (10). The quench water contains a neutralizing agent, in excess of the amount necessary to neutralize hydrogen halide acids present therein, to thereby form halide salts. The quench water containing the halide salts is purified to recover the halide salts. The salt- free water is essentially environmentally non-toxic and can either be recycled to the process or discarded in conformity with environmental regulations.

L'invention concerne un procédé servant à limiter au maximum la corrosion provoquée par l'halogénure d'hydrogène dans un gazéificateur à extinction pendant la réaction d'oxydation partielle non catalytique d'une charge hydrocarbonée contenant halogène, de manière à produire un gaz de synthèse contenant de l'halogénure d'hydrogène, des particules solides finement divisées et des scories non toxiques. Ce gaz de synthèse est mis en contact avec de l'eau dans la zone d'extinction (14) du gazéificateur (10). L'eau d'extinction contient un agent neutralisant, en quantité supérieure à celle qui est nécessaire pour neutraliser les acides d'halogénure d'hydrogène présents dans le gaz, de manière à obtenir des sels halogénure. L'eau exempte de sels ne présente pas de danger pour l'environnement et peut être soit recyclée vers le processus, soit rejetée de façon conforme aux règlements concernant l'environnement.

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