| 摘要 |
A magnesium oxide-containing catalyst which has been used to isomerize butene-2 to butene-1 is regenerated at a localized bed temperature to not exceed about 1000 DEG F., preferably not to exceed about 900 DEG F., by steps involving purging the catalyst with an inert gas, then admixing with said gas oxygen or oxygen-containing gas to produce a final mixture to contain not more than about 0.5 volume percent O2, and passing said mixture through the catalyst, controlling flow of the mixture to maintain the catalyst at a localized temperature not exceeding substantially about 1000 DEG F., preferably not exceeding about 900 DEG F., increasing the O2 content of the mixture gradually, but not sufficiently to substantially exceed said temperature of about 1000 DEG F., preferably 900 DEG F., continuing to pass said mixture through the catalyst until substantially no more carbon oxides are detected in the gas exiting the catalyst, arresting flow of oxygen to the catalyst, continuing to pass said inert gas through the catalyst until substantially all O2 has been purged therefrom, then purging said catalyst to prepare it for isomerization use.
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