Sulfur removal
OwnerWarren E. Brown, Dennis L. Holtermann +1inventors
InventorsWarren E. Brown, Dennis L. Holtermann, John V. Heyse
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Abstract
A process for reducing the amount of down time or yield loss associated with a sulfur upset when using a sulfur-sensitive catalyst. The process comprises applying a metallic coat, cladding, plating or paint to a reactor system which comprises a base metal, so as to form an adherent metallic layer on the base metal and thereby produce a metal-coated reactor system; loading a sulfur-sensitive catalyst into the system; and, after a sulfur upset, using a process comprising sulfur stripping to remove sulfur contaminants from the metal-coated reactor system.
Claims29
A process for reducing the down time or yield loss associated with a sulfur upset, comprising:
- a) applying a metallic coat, cladding, plating or paint to a reactor system which comprises a base metal, so as to form an adherent metallic layer on the base metal and thereby produce a metal-coated reactor system;
- b) loading a sulfur-sensitive catalyst into the system;
- and
- c) after a sulfur upset, using a process comprising sulfur stripping to remove sulfur from the metal-coated reactor system.
A method of reducing the down time or yield loss associated with a sulfur upset in a reactor system which uses a sulfur-sensitive catalyst for hydrocarbon conversion, comprising the steps of:
- a) coating at least a portion of a reactor system with a coating containing a metal that is less reactive toward sulfur than iron at sulfur stripping conditions;
- b) converting hydrocarbons in said reactor system using a sulfur-sensitive catalyst;
- and
- c) using a hydrogen-containing gas to strip sulfur from said system after a sulfur upset.
A process for removing sulfur from a sulfur contaminated metal-coated reactor system containing a highly sulfur-sensitive catalyst that has suffered a sulfur upset, comprising the steps of:
- a) removing the highly sulfur-sensitive catalyst from the reactor system;
- b) adding a sulfur sorbent to the reactor system;
- and
- c) contacting the contaminated surfaces of the metal-coated reactor system with a substantially sulfur-free gas containing hydrogen and sorbing contaminant sulfur at conditions of time and temperature sufficient to reduce the sulfur concentration at the system outlet to below 100 ppb.
A process to remove sulfur from a metal-coated reactor system that has been contaminated with sulfur, comprising contacting the contaminated surfaces of a metal-coated reactor system with a substantially sulfur-free, reactive gas for a time and at a temperature sufficient to reduce the sulfur concentration at the reactor outlet by at least 50%.
Dependencies are inferred from the claim text.