Membrane and process for the recovery of acid

Details Membrane and process for the recovery of acid Membrane and process for the recovery of acid

2011-07-12

2011-07-12

Menon, Krishnan S (Department: 1777)

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

C210S640000, C210S650000, C210S321600, C210S500420, C210S500360

Reexamination Certificate

active

07976710

ABSTRACT:
A cross-linked polyvinyl sulfate, copolymer of polyvinyl sulfate and polyvinyl alcohol, or Nafion® membrane is used for recovering sulfuric acid from a feed mixture comprising predominantly acid and water under reverse osmosis conditions wherein sulfuric acid is enriched in the retentate stream and water is removed in the permeate stream.

REFERENCES:
patent: 2276210 (1942-03-01), Lane et al.
patent: 3275575 (1966-09-01), Fogle
patent: 3333019 (1967-07-01), Nathan et al.
patent: 3462362 (1969-08-01), Kollsman
patent: 3963567 (1976-06-01), Cole
patent: 4012324 (1977-03-01), Gregor
patent: 4071454 (1978-01-01), Yamamoto et al.
patent: 4767645 (1988-08-01), Linder et al.
patent: 4833014 (1989-05-01), Linder et al.
patent: 4876403 (1989-10-01), Cohen et al.
patent: 4960517 (1990-10-01), Cadotte
patent: 5565102 (1996-10-01), Brandt et al.
patent: 5976324 (1999-11-01), Groschl et al.
patent: 6159382 (2000-12-01), Conant et al.
patent: 6183642 (2001-02-01), Heijnen et al.
patent: 6183648 (2001-02-01), Kozak et al.
patent: 6610268 (2003-08-01), Young et al.
patent: 2004/0222157 (2004-11-01), Minhas et al.
patent: 2005/0173345 (2005-08-01), Minhas et al.
patent: 0 352 798 (1989-07-01), None
patent: 0 307 636 (1991-12-01), None
patent: 05-301034 (1993-11-01), None
patent: 07-265864 (1995-10-01), None
patent: 10-132241 (1998-05-01), None
patent: WO 88/05769 (1988-08-01), None
patent: WO 98/43716 (1998-10-01), None
patent: WO 99/50177 (1999-10-01), None
patent: WO 01/89654 (2001-11-01), None
patent: WO 2004/074811 (2004-09-01), None
William Y. Hsu, Timothy D. Gierke; “Ion Transport and Clustering in Nafion Perfluorinated Membranes,” Journal of Membrane Science, 13 (1983) pp. 307-326.
Jia Zhiqian, Zhu Changqing, Zhang Qun, Liu Huijuan, Liu Zhongzhou, Qu Jiuhui, Fu Dianpo; “Comprehensive utilization of acidic wastewater from 3,3′-dichlorobenzidine hydrochloride manufacture,” J. Chem. Technol. Biotechnol 76, pp. 1085-1090.
Richard W.Baker; Book—Membrane Technology and Applications, Second Edition, Chapter 5—Reverse Osmosis; John Wiley & Sons, Ltd., 2004, pp. 191-235.

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