Chevron U.s.a. Inc.

Chevron Research & Technology Company

Chevron Chemical Company LLC

Paul G Johnson

Bernard F Mulaskey

John V Heyse

Stephen Joseph Miller

Disclosed are methods for dehydrogenation in reactor systems of improved resistance to carburization under dehydrogenation conditions.

Dehydrogenation processes, equipment and catalyst loads therefor

A process is provided for catalyst dehydrogenation of light paraffinic hydrocarbons using a catalyst comprising a noble metal and an intermediate pore size zeolite having a specified alkali content. The catalyst is sulfur tolerant, so that the dehydrogenation process can be carried out in the presence of sulfur or with periodic exposure to sulfur.

Dehydrogenation using sulfur tolerant zeolite catalyst

Disclosed are methods for dehydrogenation of alkanes into alkenes in reactor systems of improved resistance to carburization under dehydrogenation conditions. The reactor walls are provided with a carburization and abrasion resistant protective layer by applying a metal plating, cladding or other coatings, such as painting, of a metal, such as Sb, As, Bi, Cu, Cr, Ga, Ge, In, Pb, Se, Te, Sn, particularly tin as a stannide layer, for forming a carburation resistant protective layer to a thickness of about 0.5 to 15 mils, effective to isolate the steel portion from hydrocarbons during the dehydrogenation process while avoiding any substantial liquid metal embrittlement. The protective layer is formed anchored to the steel portion through an intermediate carbide-rich bonding layer.

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Pinole, CA, United States of America

Paul G Johnson