Method for preparing hydroxylamine

Details Method for preparing hydroxylamine Method for preparing hydroxylamine

2008-07-15

2008-07-15

Davis, Brian J (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

C564S301000

Reexamination Certificate

active

11712690

ABSTRACT:
A method for preparing hydroxylamine, comprising the steps of: (i) pretreating the acidic buffer solution with the compounds having a functional group represented by formula (I), thereby removing metal impurities from the acidic buffer solution; and (ii) reducing nitrate ions in the acidic buffer solution with hydrogen to give hydroxylamine in the presence of catalysts,According to the present invention the selectivity for reducing nitrate ions to give hydroxylamine can be significantly enhanced.

REFERENCES:
patent: 3767758 (1973-10-01), Mars et al.
patent: 4062927 (1977-12-01), De Rooij et al.
Database Caplus on Stn, Acc. No. 1972:5425, Duyverman et al., DE 2114806 A (Oct. 14, 1971) (abstract).
Database Caplus on Stn, Acc. No. 1999:538142, Watzenberger et al., DE 19806578 (Aug. 19, 1999) (abstract).
Database Caplus on Stn, Acc. No. 1977:503934, De Rooij et al., NL 7507119 (Dec. 20, 1976) (abstract).

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