Extraction of water-soluble metal chelates used as catalysts in

Details Extraction of water-soluble metal chelates used as catalysts in Extraction of water-soluble metal chelates used as catalysts in

1996-10-04

1997-12-16

Therkorn, Ernest G.

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210511, 208189, 208311, 585800, B01D 1104

Patent

active

056981031

ABSTRACT:
Sweetening of sour hydrocarbon feedstocks by contacting with an aqueous solution of a metal chelate as an oxidation catalyst in the presence of oxygen is hindered by the difficulty of recovering metal chelate. Extraction of the aqueous phase with a liquid secondary amine with low water solubility removes a main portion of the metal chelate, usually a mixture of polysulfonated cobalt phthalocyanines, from the aqueous phase, and subsequent recovery of the chelate from the amine extract enables a viable alternative to feed bed processes.

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Handbook of Petroleum Refining Processes, McGraw-Hill Book Company, pp. 9-3 to 9-13 (undated).

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