Process for the continuous recovery of free tartaric acid from raw materials containing potassium hydrogentartrate
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United States of America Patent
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Dec 25, 2007
Grant Date -
Nov 25, 2004
app pub date -
Feb 26, 2004
filing date -
Feb 26, 2003
priority date (Note) -
Expired
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Abstract
In a process for the continuous recovery of free tartaric acid from raw materials containing potassium hydrogentartrate, the same are mixed with water and the potassium hydrogentartrate is dissolved. The process is improved in that the suspension is decanted, the clarified liquid is refiltered, the filtrate is cooled to crystallization temperature under a vacuum, the potassium hydrogentartrate crystals formed are dissolved, the solution is subjected to a cation exchange, and the tartaric acid solution obtained is evaporated.
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