Anti-coking iron spinel surface
AssigneeNOVA Chemicals (International) S.A.
InventorsEvan Mah, Vasily Simanzhenkov, Leslie Benum, Hany Farag, Bolaji Olayiwola
Life of this patent
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Abstract
An anti-coking surface having a thickness up to 15 microns comprising from 15 to 50 wt. % of MnCr2O4 (for example manganochromite); from 15 to 25 wt. % of Cr0.23Mn0.08Ni0.69 (for example chromium manganese nickel); from 10 to 30 wt. % of Cr1.3Fe0.7O3 (for example chromium iron oxide); from 12 to 20 wt. % of Cr2O3 (for example eskolaite); from 4 to 20 wt. % of CuFe5O8 (for example copper iron oxide); and less than 5 wt. % of one or more compounds chosen from FeO(OH), CrO(OH), CrMn, Si and SiO2 (either as silicon oxide or quartz) and less than 0.5 wt. % of aluminum in any form provided that the sum of the components is 100 wt. % is provided on steel.
Claims21
A reactor, wherein the internal surface of the reactor is a metal substrate comprising from 20 to 50 wt. % of Ni;
- and less than 0.05 wt. % of one or more elements chosen from Cu and Al, wherein at least a portion of the substrate comprises a protective coating having a thickness of up to 15 microns and comprising from 15 to 50 wt. % of manganochromite;
- from 15 to 25 wt. % of chromium manganese nickel, from 10 to 30 wt. % of chromium iron oxide, from 12 to 20 wt. % of eskolaite, from 4 to 12 wt. % of copper iron oxide, and less than 5 wt. % of one or more compounds chosen from FeO(OH), CrO(OH), CrMn, Si, and SO2, and less than 0.5 wt. % of aluminum in any form.
Dependencies are inferred from the claim text.