Recovery of acetic acid from a fermentation broth
First Claim
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1. A process for the recovery of acetic acid from an aqueous solution of clacium acetate which comprises the steps of:
- (a) adding a molar equivalent of a water-soluble tertiary amine carbonate to the calcium acetate solution to form a trialkylammonium acetate solution and a precipitate of calcium carbonate;
(b) concentrating the trialkylammonium acetate solution; and
(c) heating the concentrated trialkylammonium acetate solution to obtain acetic acid and the tertiary amine.
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Abstract
A process is provided for the recovery of acetic acid from dilute aqueous solutions. The acid in the form of its calcium salt is treated with a tertiary amine carbonate and the resulting trialkylammonium acetate is isolated and heated to give the acetic acid plus a tertiary amine.
64 Citations
20 Claims
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1. A process for the recovery of acetic acid from an aqueous solution of clacium acetate which comprises the steps of:
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(a) adding a molar equivalent of a water-soluble tertiary amine carbonate to the calcium acetate solution to form a trialkylammonium acetate solution and a precipitate of calcium carbonate; (b) concentrating the trialkylammonium acetate solution; and (c) heating the concentrated trialkylammonium acetate solution to obtain acetic acid and the tertiary amine. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A process for the recovery of acetic acid from a fermentation reaction which comprises:
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(a) converting of the acetic acid to calcium acetate; (b) adding a molar equivalent of a water-soluble tertiary amine carbonate to the calcium acetate solution to form a trialkylammonium acetate solution and a precipitate of calcium carbonate; (c) concentrating the trialkylammonium acetate solution; and (d) heating the concentrated trialkylammonium acetate solution to obtain acetic acid and the tertiary amine. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification