Loss of the isobutylene which is recycled must be minimized. In the present invention, the dehydrogenation process is operated so as to limit the isomerization of isobutane or isobutylene to their corresponding straight-chain (i.e., normal) form.f the feed stream is substantially pure isobutane (i.e., it contains no isobutylene) it has been determined that, when using a Pt-Nd on zinc aluminate catalyst, a selectivity of 95% or more to isobutylene can be obtained with a residence time of about 5 seconds at a temperature of about 510Â° C. or lower.
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A notary must notify the Secretary of the Commonwealthâs Office with any changes to the information provided on this application. A notary must provide the following items on each document notarized: 1  The name of the county or independent city in which the document is signed.  The date the document is signed.