Chemistry: electrical and wave energy – Processes and products – Processes of treating materials by wave energy
Patent
1986-10-14
1988-04-26
Niebling, John F.
Chemistry: electrical and wave energy
Processes and products
Processes of treating materials by wave energy
204153, 204130, 2041824, 204DIG13, C02F 146, C25B 700, B01D 1302
Patent
active
047402814
ABSTRACT:
We have discovered an improved, energy efficient method for recovering and regenerating acid from a solution comprising acid and salt. The process comprises of the steps of supplying a solution comprising salt and a first concentration of acid to a first compartment of an electrodialysis apparatus comprising a first compartment and a second compartment, supplying a liquid comprising water to the second compartment, applying a direct current to the electrodialysis apparatus to form, in the first compartment, a first product comprising salt and a second concentration of acid, the second concentration of acid being less than the first concentration of acid, and, in the second compartment, a second product comprising water and enriched in acid by a proportionate amount, recovering the first product, recovering the second product, recovering acid from the first product using electrodialytic water splitting to convert at least a portion of the salt to a third product comprising acid, and recovering the third product. The process has particular utility for the recovery and regneration of mixed acids from spent pickle liquors containing free nitric acid and salts of an anion other than nitrate anion.
REFERENCES:
patent: 3787304 (1974-01-01), Chlanda et al.
patent: 4107015 (1978-08-01), Chlanda et al.
patent: 4391680 (1983-07-01), Mani et al.
patent: 4504373 (1985-03-01), Mani et al.
patent: 4536269 (1985-08-01), Chlanda et al.
patent: 4584077 (1986-04-01), Chlanda et al.
patent: 4592817 (1986-06-01), Chlanda et al.
patent: 4608141 (1986-08-01), Chlanda et al.
patent: 4629545 (1986-12-01), Mani et al.
patent: 4636289 (1987-01-01), Mani et al.
patent: 4645625 (1987-02-01), Lundstrom
Yasutoshi Kobuchi et al., Application of Ion Exchange Membranes to the Recovery of Acids by Diffusion Dialysis and Electrodialysis. Synthetic Polymeric Membranes--Prague, Jul.-10, 1986, Jun. 1986.
Chiao Yu-Chih
Chlanda Frederick P.
Mani Krishnamurthy N.
Allied Corporation
Fuchs Gerhard H,.
Negin Richard A.
Niebling John F.
Starsiak Jr. John S.
LandOfFree
Recovery of acids from materials comprising acid and salt does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Recovery of acids from materials comprising acid and salt, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Recovery of acids from materials comprising acid and salt will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-818193