PREPARATION AND SEPARATION OF A DI-CARBOXYLIC ACID-CONTAINING MIXTURE

摘要

Processes for separating a di-carboxylic acid or salt thereof from a mixture containing the di-carboxylic acid or salt thereof and one or more other components are provided. Also separation media useful for these separation processes is provided. In particular, processes for preparing an aldaric acid are described, such as glucaric acid from glucose, which includes separating the aldaric acid from the reaction product. Also, various glucaric acid products are described.

主权项

1. A process for producing an extract comprising a di-carboxylic acid or salt thereof, the process comprising:
contacting a separation media in a separation zone with the feed mixture comprising the di-carboxylic acid or salt thereof and a second component, wherein at least a portion of the di-carboxylic acid or salt thereof and the second component are retained on the separation media; eluting at least a portion of the second component from the separation media with an eluent to form a raffinate comprising the second component; removing the raffinate from the separation zone; and eluting the di-carboxylic acid or salt thereof from the separation media with an eluent comprising water to form the extract comprising the di-carboxylic acid or salt thereof, wherein the separation media comprises a di-carboxylate form of an anion exchange chromatography resin.