Catalytic composite and process for mercaptan sweetening
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United States of America Patent
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Apr 25, 1989
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N/A
app pub date -
Feb 5, 1988
filing date -
Feb 5, 1988
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Expired
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Abstract
This invention relates to a catalytic composite effective in oxidizing mercaptans contained in a sour petroleum distillate to disulfides. The catalytic composite comprises a metal chelate, an onium compound and optionally an alkali metal hydroxide. The onium compound may be selected from the group consisting of phosphonium, arsonium, stibonium, oxonium and sulfonium compounds, with phosphonium, oxonium and sulfonium compounds preferred. Additionally, metal phthalocyanines are a preferred class of metal chelates. This invention also relates to an improved process for treating a sour petroleum distillate, wherein the improvement comprises using the catalytic composite described above.
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