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filingDate 1976-01-02-04:00^^<http://www.w3.org/2001/XMLSchema#date>
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publicationNumber US-4039428-A
titleOfInvention Purification of propionic acid
abstract A process is provided for producing ultra-pure propionic acid, i.e., acid containing less than 20 parts by weight of iodine per billion parts by weight of acid, wherein crude acid containing water and iodine contaminants is distilled in a single distillation zone and no waste streams requiring treatment or disposal are obtained.
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