Chemistry of hydrocarbon compounds – Purification – separation – or recovery – By addition of extraneous agent – e.g. – solvent – etc.
Patent
1997-11-20
2000-03-14
Griffin, Walter D.
Chemistry of hydrocarbon compounds
Purification, separation, or recovery
By addition of extraneous agent, e.g., solvent, etc.
585856, 208263, 208273, 208256, 208259, 208271, 208283, 208284, 208286, C07C 710
Patent
active
060375167
ABSTRACT:
Oxygenate impurities are removed from an organic chemical feed or stream by treatment with an aqueous reducing agent and aqueous base, accompanied by separation. An aqueous solution of reducing agent and an aqueous solution of base are typically introduced sequentially into the organic chemical stream, where they may react with any oxygenate impurities present. The reaction products of the oxygenate impurities and aqueous reducing agent and aqueous base are water soluble, and are typically removed in sequential fashion via any suitable separation means. For example, oxygenate impurities such as formaldehyde, acetaldehyde, propionaldehyde, and methyl formate may be removed from a propylene stream by treating the stream sequentially with aqueous sodium bisulfite and aqueous sodium hydroxide, accompanied by separation of the oxygenate impurity reaction products in coalescers.
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Culbreth, III William K.
Lambert Timothy L.
Morford Peter S.
Griffin Walter D.
Huntsman ICI Chemicals LLC
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