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US 5,493,031 AGranted
N-hydroxysuccinimide monohydrate
AssigneePPG Industries, Inc.
InventorCheruthur Govindan
Life of this patent
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Abstract
N-hydroxysuccinimide monohydrate is precipitated from an aqueous solution of N-hydroxysuccinimide. N-hydroxysuccinimide monohydrate is a new compound that can be used to produce anhydrous N-hydroxysuccinimide which is substantially pure. It can also be used as a substitute for N-hydroxysuccinimide when the presence of water is not detrimental.
Claims27
N-Hydroxysuccinimide monohydrate.
A method comprising:
- (a) dissolving solid N-hydroxysuccinimide in water to form a substantially salt-free aqueous solution;
- and
- (b) precipitating N-hydroxysuccinimide monohydrate from said solution.
A method comprising:
- (a) reacting succinic anhydride with free hydroxylamine in water to form a substantially salt-free reaction mixture;
- (b) heating said reaction mixture and removing water to produce solid N-hydroxysuccinimide;
- (c) dissolving said solid N-hydroxysuccinimide in water to form a substantially salt-free aqueous solution;
- and
- (d) precipitating N-hydroxysuccinimide monohydrate from said solution.
2 more elements
A method comprising removing water of hydration from N-hydroxysuccinimide monohydrate to produce anhydrous N-hydroxysuccinimide.
Dependencies are inferred from the claim text.