Method for inhibiting ethylene oxide polymer growth caused by rust using redox chemistry
AssigneeShell Oil Company
InventorThomas Howard Johnson
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Abstract
A method for reducing the formation of non-volatile residue (NVR) in alkylene oxide, preferably ethylene oxide, comprising contacting the alkylene oxide with fresh electron source material effective to convert ferric ions to ferrous ions. Iron (Fe0), chromium, and a combination thereof are preferred fresh electron source materials, with iron (Fe0) being most preferred.
Claims85
A method for reducing the formation of non-volatile residue (NVR) in ethylene oxide (EO) comprising:
- providing a vessel retaining EO comprising ferric ions;
- and,
- contacting said EO with fresh electron source material effective to convert said ferric ions to ferrous ions.
A method for reducing the formation of non-volatile residue (NVR) in ethylene oxide (EO) comprising:
- providing a vessel retaining EO comprising ferric ions;
- and,
- contacting said EO with fresh electron source material comprising Fe0 effective to convert said ferric ions to ferrous ions.
A method for reducing the formation of non-volatile residue (NVR) in alkylene oxides comprising:
- providing a vessel retaining alkylene oxide comprising ferric ions;
- and,
- contacting said alkylene oxide with fresh electron source material effective to convert said ferric ions to ferrous ions.
A storage or transport vessel comprising walls retaining alkylene oxide comprising ferric ions, said alkylene oxide contacting fresh electron source material effective to convert said ferric ions to ferrous ions.
A storage or transport vessel retaining ethylene oxide comprising ferric ions, said ethylene oxide contacting fresh electron source material effective to convert said ferric ions to ferrous ions.
Dependencies are inferred from the claim text.