Back to results
US 7,524,989 B2Granted
Stabilized hydroxylamine solutions
AssigneeBASF SE
InventorRichard J. Williams
Life of this patent
Estimating the term…
Abstract
A stabilized hydroxylamine solution is disclosed. The stabilized solution comprises a selected stabilizer, which can be added during manufacture and/or storage of the hydroxylamine solution.
Claims5
A stabilized hydroxylamine solution comprising a selected stabilizer selected from the group consisting of
- (a) 1,4,8,11-tetraazacyclotetradecane-1,4,8,11-tetraacetic acid,
- (b) 4,8-dihydroxyquinoline-2-carboxylic acid,
- (c) 4,7-dihydroxy-1,10-phenanthroline,
- (d) 2-mercaptonicotinic acid,
- (e) bis[N,N-bis(carboxymethyl)-aminomethyl]fluorescein,
- (f) N,N′-bis(2-carboxyethyl)-N,N′-ethylenediglycine trihydrate,
- (g) cystine,
- (h) 2,3-dihydroxybenzoic acid,
- (i) thiosalicylic acid and
- (j) mixtures of the foregoing.
7 more elements
A method of stabilizing a hydroxylamine solution which comprises adding at least one selected stabilizer to the solution wherein said stabilizer is selected from the group consisting of
- (a) 1,4,8,11-tetraazacyclotetradecane-1,4,8,11-tetraacetic acid,
- (b) 4,8-dihydroxyquinoline-2-carboxylic acid,
- (c) 4,7-dihydroxy-1,10-phenanthroline,
- (d) 2-mercaptonicotinic acid,
- (e) bis[N,N-bis(carboxymethyl)-aminomethyl]fluorescein
- (f) N,N′-bis(2-carboxyethyl)-N,N′-ethylenediglycine trihydrate
- (g) cystine,
- (h) 2,3-dihydroxybenzoic acid,
- (i) thiosalicylic acid and
- (j) mixtures of the foregoing.
7 more elements
A stabilized hydroxylamine solution comprising a selected stabilizer selected from the group consisting of
- (a) 1,4,8,11-tetraazacyclotetradecane-1,4,8,11-tetraacetic acid,
- (b) 4,8-dihydroxyquinoline-2-carboxylic acid,
- (c) 4,7-dihydroxy-1,10-phenanthroline,
- (d) 2-mercaptonicotinic acid,
- (e) bis[N,N-bis(carboxymethyl)-aminomethyl]fluorescein,
- (f) cystine,
- (g) 2,3-dihydroxybenzoic acid,
- (h) thiosalicylic acid and
- (i) mixtures of the foregoing.
6 more elements
Dependencies are inferred from the claim text.