Patent ID: 7442264
Filing Date: 2008-10-28
Classification: C10B,C10G,C23C

Abstract:
1. In a naphtha catalytic reforming process carried out at temperature of 450° C. to 650° C. or an isobutane dehydrogenation process carried out at temperature of 550° C. to 700° C., the improvement comprising performing said naphtha catalytic reforming process or isobutane dehydrogenation process in a furnace, reactor or tube, entirely or partially fabricated with a steel made from an alloy comprising: at most 0.25% C; more than 2.0% up to 10% Mn; 1.5% to 5% Si; at most 0.03% P; at most 0.03% S; 4% to 10% Cr; 0.5% to 2% Mo; at most 0.40% V; and at most 0.10% N; the complement to 100% being essentially iron, and with the provision that the alloy has an Mn/Si ratio in the range of 1.5/1 to 3/1, wherein said alloy exhibits anticoking properties.