Regeneration of isomerization catalysts containing magnesium oxi

Details Regeneration of isomerization catalysts containing magnesium oxi Regeneration of isomerization catalysts containing magnesium oxi

1978-05-11

1980-08-12

Konopka, P. E.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252420, 585664, B01J 2120, C07C 530

Patent

active

042172446

ABSTRACT:
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.degree. F., preferably not to exceed about 900.degree. 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 O.sub.2, 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.degree. F., preferably not exceeding about 900.degree. F., increasing the O.sub.2 content of the mixture gradually, but not sufficiently to substantially exceed said temperature of about 1000.degree. F., preferably 900.degree. 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 O.sub.2 has been purged therefrom, then purging said catalyst to prepare it for isomerization use.

REFERENCES:
patent: 2344770 (1944-03-01), Gunness
patent: 2361613 (1944-10-01), Drennan
patent: 3609097 (1971-09-01), Koppe
patent: 3658929 (1972-04-01), Banks

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