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ES2019018A6 - Process for the isolation, and purification, of free acids from their salts, by electrodialysis - Google Patents

Process for the isolation, and purification, of free acids from their salts, by electrodialysis

Info

Publication number
ES2019018A6
ES2019018A6 ES9000130A ES9000130A ES2019018A6 ES 2019018 A6 ES2019018 A6 ES 2019018A6 ES 9000130 A ES9000130 A ES 9000130A ES 9000130 A ES9000130 A ES 9000130A ES 2019018 A6 ES2019018 A6 ES 2019018A6
Authority
ES
Spain
Prior art keywords
acid
electrodialysis
isolation
purification
salts
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
ES9000130A
Other languages
Spanish (es)
Inventor
Gomez Ochoa
Ramon Juan Luis Martin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ercros SA
Original Assignee
Ercros SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ercros SA filed Critical Ercros SA
Priority to ES9000130A priority Critical patent/ES2019018A6/en
Priority to AT91500007T priority patent/ATE120981T1/en
Priority to EP91500007A priority patent/EP0438369B1/en
Priority to CA002034351A priority patent/CA2034351A1/en
Priority to DE69108749T priority patent/DE69108749T2/en
Priority to HU91157A priority patent/HUT58558A/en
Priority to AU69471/91A priority patent/AU6947191A/en
Priority to PL28876091A priority patent/PL288760A1/en
Publication of ES2019018A6 publication Critical patent/ES2019018A6/en
Priority to US07/922,342 priority patent/US5268079A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

Process for the isolation, and purification, of free acids from their salts, by electrodialysis by means of a four-compartment electrodialysis cell, the two compartments A, D adjacent to the electrodes being separated from the central compartments B, C by means of cationic membranes 2, 3, whilst the central compartments are separated from each other by an anionic membrane 1, an anolyte recirculating via A, water or a dilute solution of the acid to be isolated via B, an aqueous solution of the salt of the acid to be isolated via C and a catolyte via D, characterized in that, when a difference in potential is applied between the electrodes, the ions migrate so that a pure free acid is obtained in compartment B. The process makes it possible to obtain free acid not in coexistence with its salt in one and the same compartment, which enhances its purity. The process is suitable for purifying a multitude of acids, especially iminodiacetic acid (IDA).
ES9000130A 1990-01-18 1990-01-18 Process for the isolation, and purification, of free acids from their salts, by electrodialysis Expired - Lifetime ES2019018A6 (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
ES9000130A ES2019018A6 (en) 1990-01-18 1990-01-18 Process for the isolation, and purification, of free acids from their salts, by electrodialysis
HU91157A HUT58558A (en) 1990-01-18 1991-01-17 Process for isolating and purifying acids from their salts by electrodialysis
EP91500007A EP0438369B1 (en) 1990-01-18 1991-01-17 Process for the isolation and purification of free iminodiacetic acid, starting from it's salt, by elektrodialysis
CA002034351A CA2034351A1 (en) 1990-01-18 1991-01-17 Process for the isolation and purification of free acids, starting from their salts, by electrodialysis
DE69108749T DE69108749T2 (en) 1990-01-18 1991-01-17 Process for the isolation of free iminodiacetic acid from its salts by electrodialysis.
AT91500007T ATE120981T1 (en) 1990-01-18 1991-01-17 METHOD FOR ISOLATION OF FREE IMINODIESACETIC ACID FROM ITS SALTS BY ELECTRODIALYSIS.
AU69471/91A AU6947191A (en) 1990-01-18 1991-01-18 Process for the isolation and purification of free acids, starting from their salts, by electrodialysis
PL28876091A PL288760A1 (en) 1990-01-18 1991-01-18 Method of and apparatus for isolating free acids and making them free of their salts
US07/922,342 US5268079A (en) 1990-01-18 1992-07-28 Process for the isolation and purification of free acids, starting from their salts, by electrodialysis

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES9000130A ES2019018A6 (en) 1990-01-18 1990-01-18 Process for the isolation, and purification, of free acids from their salts, by electrodialysis

Publications (1)

Publication Number Publication Date
ES2019018A6 true ES2019018A6 (en) 1991-05-16

Family

ID=8265499

Family Applications (1)

Application Number Title Priority Date Filing Date
ES9000130A Expired - Lifetime ES2019018A6 (en) 1990-01-18 1990-01-18 Process for the isolation, and purification, of free acids from their salts, by electrodialysis

Country Status (1)

Country Link
ES (1) ES2019018A6 (en)

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 20040601