Regeneration of supported-nickel catalysts
AssigneeGAF Corporation
InventorsEugene V. Hort, Waldo De Thomas
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Abstract
This invention describes a method of regenerating the activity of deactivated supported-nickel catalysts that have lost activity after use as a hydrogenation catalyst in the finishing stage of the process of conversion of butynediol to butanediol. The method comprises contacting said deactivated catalyst with hydrogen at a temperature of about 200.degree. to 500.degree. C. to convert surface polymers to gaseous compounds and removing said gaseous compounds from the vicinity of the thus-treated catalyst. In the preferred form of the invention, in a single step, a slow stream of hydrogen is passed through the deactivated catalyst in situ as a fixed bed and the gaseous compounds are removed simultaneously in the hydrogen stream.
Claims7
A method of regenerating the activity of a deactivated supported-nickel catalyst that has lost activity due to the formation of carbonaceous polymers on its catalytic surfaces while in use as a hydrogenation catalyst in the finishing stage of the process of conversion of butynediol to butanediol, said catalyst consisting essentially of, in percent by weight, about 5 to 50% nickel, and, optionally, about 1 to 15% of one or more promotor metals selected from the group consisting of copper, manganese and molybdenum, which comprises:
- contacting said deactivated catalyst with hydrogen at a temperature of about 200.degree. to 500.degree. C. to convert said polymers to gaseous carbon compounds and removing said gaseous compounds from the vicinity of the thus-treated catalyst.
Dependencies are inferred from the claim text.