Regeneration of deactivated catalysts.

摘要

Deactivation of silica, alumina, silica-alumina and aluminosilicate amination catalysts by coke is inhibited by carrying out the amination reaction in the presence of hydrogen. Alternatively, the coked catalysts may be regenerated in the presence of a stream of hydrogen or of hydrogen and ammonia at somewhat lower temperatures than those commonly used in processes for coke removal by oxidation, thereby reducing the risk of structural damage to the catalyst.