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US 5,292,943 AGranted
Method for the preparation of low odor 2,3-dimercaptosuccinic acid
AssigneeMcNeil-PPC, Inc.
InventorElvin R. Lukenbach
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Abstract
A method for producing low odor meso-2,3-dimercaptosuccinic acid is provided whereby a meso-2,3-dimercaptosuccinic acid substrate is washed with an aqueous wash medium and subsequently dried, preferably at a temperature of less than 40.degree. C. and a low odor meso-2,3-dimercaptosuccinic acid is also provided by this invention.
Claims7
A method of preparing low odor meso-2,3-dimercaptosuccinic acid comprising:
- washing a meso-2,3-dimercaptosuccinic acid substrate at least twice with an aqueous wash medium containing less than about 10% by weight alcohol;
- and
- drying the washed meso-2,3-dimercaptosuccinic acid substrate.
A method of preparing low odor meso-2,3-dimercaptosuccinic acid comprising:
- washing a meso-2,3-dimercaptosuccinic acid substrate at least with an aqueous wash medium containing less than about 10%, by weight alcohol;
- and
- drying the washed meso-2,3-dimercaptosuccinic acid substrate at a temperature of about 40.degree. C. or less.
The method of claim wherein the washed meso-2,3-dimercaptosuccinic acid substrate is dried at a temperature of about 30.degree. C. or less.
Dependencies are inferred from the claim text.