Preparation and purification of hydroxylamine stabilizers

Details Preparation and purification of hydroxylamine stabilizers Preparation and purification of hydroxylamine stabilizers

2006-05-16

2006-05-16

Zucker, Paul A. (Department: 1621)

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

Organic compounds

Carboxylic acids and salts thereof

Reexamination Certificate

active

07045655

ABSTRACT:
The invention relates to the preparation of ultra-high purity 1,2-diaminocyclohexane-tetraacetic acid being essentially free of unwanted metal and metal ion contaminants and its use as a stabilizer for ultra-high purity hydroxylamine compounds used extensively in the production of high premium electronic components.

REFERENCES:
patent: 2519708 (1950-08-01), Schlapfer et al.
patent: 4166842 (1979-09-01), Tunick et al.
patent: 5808150 (1998-09-01), Michelotti

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