Process for reducing coking of heat exchange surfaces

Details Process for reducing coking of heat exchange surfaces Process for reducing coking of heat exchange surfaces

B - Operations, Transporting

01

J

B01J 19/02 (2006.01) C10G 9/16 (2006.01) C23C 16/22 (2006.01)

Patent

CA 2182518

The invention is directed to a heat exchange surface in reactors and/or heat exchangers of installations for the conversion of hydrocarbons and other organic compounds at high temperatures in the gaseous phase. According to the invention, the metallic surfaces coming into contact with the organic substances are treated at a temperature of 300 to 1000°C over a period of 0.5 to 12 hours with a mixture of a silicon- and sulfur-containing product and a dry gas flow which is inert with respect to the silicon- and sulfur-containing product. The invention is further directed to a process for producing a catalytically inactivated metallic surface in chemical reactors and/or heat exchangers.

L'invention concerne une surface d'échange de chaleur dans des réacteurs et/ou des échangeurs de chaleur d'installations de traitement d'hydrocarbures et d'autres composés organiques à haute température, en phase gazeuse. Les surfaces métalliques qui entrent en contact avec les substances organiques sont traitées avec un mélange d'un produit contenant du silicium et du soufre et d'un courant de gaz sec inerte par rapport au produit contenant du silicium et du soufre, à une température comprise entre 300 et 1000 DEG C pendant 0,5 à 12 heures. L'invention concerne en outre un procédé de production d'une surface métallique catalytiquement désactivée dans des réacteurs chimiques et/ou des échangeurs de chaleur.

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