Removal of Fe.sup.(II) from hydroxylamine sulfate solution

Details Removal of Fe.sup.(II) from hydroxylamine sulfate solution Removal of Fe.sup.(II) from hydroxylamine sulfate solution

1990-11-29

1991-11-26

Sever, Frank

Liquid purification or separation

Processes

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

210681, B01D 1104, B01D 1504, C02F 164

Patent

active

050680374

ABSTRACT:
Purification of a concentrated aqueous solution of hydroxylamine sulfate (HAS) is carried out by contacting with an organic solution of 1-phenyl-3-methyl-4-trifluoroacetylpyrazol-5-one (HPMTFP) and trioctylphosphine oxide (TOPO). Divalent iron (Fe.sup.II) is removed to below about 3 wt. ppm making it possible to use the purified solution directly in the production of oxime compounds without further purification heretofore required.

REFERENCES:
Umetani et al., "The Solvent Extraction of Divalent Metals with 1-Phenyl-3-Methyl-4-Trifluoroacetylpyrazol-5-one and TOPO as the Group Separation and Concentration Methods of Trace Metals", Bull Inst. Chem Res., Kyoto Univ., vol. 60, No. 3-4, 1982.

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