Using hydrocarbon streams to prepare a metallic protective...

C - Chemistry – Metallurgy – 23 – C

Patent

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C23C 8/08 (2006.01) B01J 19/02 (2006.01) C10G 35/04 (2006.01) C10G 49/00 (2006.01)

Patent

CA 2196273

A process for producing a metallic protective layer whereby a metal-containing plating, cladding, paint or other coating is applied to at least a portion of a reactor system and then contacted with a gaseous stream containing hydrocarbons, such as impure hydrogen, thereby producing a continuous and adherent metallic protective layer. The gaseous stream preferably comprises hydrogen, which may be recycled. A preferred embodiment of the invention is directed to touch-up procedures where a portion of an already protected reactor system is replaced or rewelded and the protective layer is formed as the replaced portion is brought on-stream.

L'invention concerne un procédé de production d'une couche de protection métallique. Selon ce procédé, un plaquage, un gainage, une peinture ou tout autre revêtement à base de métal est appliqué à au moins une partie d'un système de réacteur, avant d'être mis en contact avec un courant gazeux contenant des hydrocarbures, tel que de l'hydrogène impur, ce qui produit une couche de protection métallique continue et adhérente. De préférence, le courant gazeux comprend de l'hydrogène, qui peut être recyclé. Un mode de réalisation préféré de l'invention concerne des procédures de retouche, dans lesquelles une partie d'un système de réacteur déjà protégé est remplacée ou ressoudée, et la couche de protection est formée lors de la mise en service de la partie de remplacement.

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