Waste acid recovery

Details Waste acid recovery Waste acid recovery

1998-10-07

2000-12-12

Reifsnyder, David A.

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210702, 210737, 210774, 210787, 62532, 23295R, 423522, 423531, C01B 1790

Patent

active

061593826

ABSTRACT:
A process for purifying a sulfuric acid solution such as by cooling a sulfuric acid solution to at or near its freezing point to form a slurry of a solid phase and a liquid phase. The slurry has an acid-rich region and an acid-poor region. The acid-rich region is separated from the acid-poor region on the basis of density.

REFERENCES:
patent: 2254788 (1941-09-01), Ballard
patent: 2287732 (1942-06-01), Frey et al.
patent: 2593128 (1952-04-01), Felter
patent: 2662812 (1953-12-01), Shaw
patent: 2716592 (1955-08-01), Skelly et al.
patent: 2816822 (1957-12-01), Hess et al.
patent: 2857247 (1958-10-01), Putney
patent: 2862791 (1958-12-01), Stiles et al.
patent: 3049889 (1962-08-01), Carfagno
patent: 3158004 (1964-11-01), Klencke
patent: 3248890 (1966-05-01), Oman
patent: 3277667 (1966-10-01), Hedrick
patent: 3344616 (1967-10-01), Owen
patent: 3400548 (1968-09-01), Drayer
patent: 3406741 (1968-10-01), Leach
patent: 3410335 (1968-11-01), Malmstrom et al.
patent: 3565168 (1971-02-01), Powell
patent: 3607035 (1971-09-01), Jones
patent: 3616268 (1971-10-01), Philbou
patent: 3689217 (1972-09-01), Capaul et al.
patent: 3885399 (1975-05-01), Campbell
patent: 3890097 (1975-06-01), Minor
patent: 4091635 (1978-05-01), Ogman
patent: 4163047 (1979-07-01), Dorr
patent: 4169054 (1979-09-01), Cappello et al.
patent: 4314455 (1982-02-01), Engdahl
patent: 4328677 (1982-05-01), Meckler
patent: 4394364 (1983-07-01), Hakl
patent: 4468930 (1984-09-01), Johnson
patent: 4475355 (1984-10-01), Thijssen
patent: 4551159 (1985-11-01), Goldstein
patent: 4655790 (1987-04-01), Wiewiorowski et al.
patent: 4718480 (1988-01-01), Kito et al.
patent: 4740281 (1988-04-01), Chlanda et al.
patent: 4894170 (1990-01-01), Billmyre
patent: 4936114 (1990-06-01), Engdahl et al.
patent: 4954322 (1990-09-01), DeMarthe
patent: 5102544 (1992-04-01), Roodenrijs
patent: 5181396 (1993-01-01), Saari
patent: 5220802 (1993-06-01), Kiczek et al.
patent: 5228885 (1993-07-01), Wagner et al.
patent: 5275701 (1994-01-01), Mazzafro et al.
patent: 5388414 (1995-02-01), Cheng
patent: 5394706 (1995-03-01), Keus
patent: 5537832 (1996-07-01), Keus
patent: 5575160 (1996-11-01), Keus
Gable et al. "Phase Equilibria of the System Sulfur Trioxide-Water," Journal American Chemical Society, vol. 72, Apr. 1950, pp. 1445-1448.
T.R. Rubin and W.F. Giauque, "The Heat Capacities and Entropies of Sulfuric Acid and Its Mono-and Dihydrates From 15 to 300.degree.K..sup.1," Journal American Chemical Society, vol. 74, Feb. 5, 1952, pp. 800-803.
T.R. Bump and Wilmer L. Sibbitt, "Aqueous Solutions of Nitric Acid and of Sulfuric Acid," Industrial and Engineering Chemistry, vol. 47, No. 8, Aug. 1955, pp. 1665-1670.
Refrigeration Resources, "Chill Steel-Pickling Acids to Ease Metals Recovery," Chemical Engineering, Nov. 1995, p. 186C.
F. J. Zeleznik, "Thermodynamic Properties of the Aqueous Sulfuric Acid System to 350 K," Journal Physical and Chemical Reference Data, vol. 20, No. 6, Nov./Dec. 1991, pp. 1157-1200.
Giauque et al., "The Thermodynamic Properties of Aqueous Sulfuric Acid Solutions and Hydrates From 15 to 300.degree.K," Journal American Chemical Society, vol. 82, Jan. 5, 1960, pp. 62-70.
Kunzler et al., "The Freezing Point Curves of Concentrated Aqueous Sulfuric Acid," Journal American Chemical Society, vol. 74, No. 21, Nov. 1952, pp. 5271-74.
Hornung et al., "The Heat Capacities and Entropies of Sulfuric Acid Tri--and Tetrahydrates," Journal American Chemical Society, vol. 77, Jun. 1955, pp. 2983-87.
Hornung et al., "The Low Temperature Heat Capacity and Entropy of Sulfuric Acid Hemihexahydrate. Some Observations on Sulfuric Acid "Octahydrate","Journal American Chemical Society, vol. 78, Nov. 1956, pp. 5747-51.
Jaecker-Voirol et al., "Vapor Pressures in the Ternary System Water-Nitric Acid-Sulfuric Acid at Low Temperatures," Journal of Geophysical Research, vol. 95, No. D8, Jul. 1990, pp. 11, 857-63.
Worsnop et al., "Vapor Pressures of Solid Hydrates of Nitric Acid: Implications for Polar Stratospheric Clouds, " Science, vol. 259, Jan. 1993, pp. 71-74.
Zhang et al., "Vapor Pressure Measurements for the H.sub.2 SO.sub.4 /HNO.sub.3 /H.sub.2 O and H.sub.2 SO.sub.4 /HC1/H.sub.2 O Systems: Incorporation of Stratospheric Acids into Background Sulfate Aerosols," Journal of Physical Chemistry, vol. 97, No. 32, Aug. 12, 1993, pp. 8541-48 .

Affiliated with

Also associated with

Rating

Waste acid recovery does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Waste acid recovery, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Waste acid recovery will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-212975