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US 6,395,926 B1Granted
Process for recovering low-boiling acids
AssigneeThe Texas A&M University System
InventorsMark T. Holtzapple, Richard R. Davison
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Abstract
The invention provides a method for recovering low-boiling acids from a concentrated solution of the calcium salt of the acid by treating the concentrated solution of calcium salts of the low-boiling acids with a high molecular weight tertiary amine and carbon dioxide.
Claims8
A process for recovering low-boiling acids from a concentrated solution of calcium salt of the acid comprising
- contacting a concentrated solution of calcium salt of low-boiling acids with a high-molecular-weight tertiary amine and carbon dioxide,
- forming calcium carbonate precipitate and a liquid solution containing high-molecular-weight tertiary amine/acid complex,
- washing the calcium carbonate precipitate with a volatile solvent to remove residual high-molecular-weight tertiary amine,
- drying the calcium carbonate precipitate to remove residual volatile solvent, and
- thermally breaking the high-molecular-weight tertiary amine/acid complex and allowing the nonvolatile high-molecular-weight tertiary amine to separate from volatile low-boiling acids.
2 more elements
Dependencies are inferred from the claim text.