Liquid purification or separation – Filter – Material
Reexamination Certificate
2006-05-16
2006-05-16
Drodge, Joseph (Department: 1723)
Liquid purification or separation
Filter
Material
C210S500420, C210S640000
Reexamination Certificate
active
07045062
ABSTRACT:
Pervaporation membranes including poly(acrylamide)-grafted alginate membranes, which may be optimized for the separation of alcohols from water, low viscosity sodium alginate membranes containing PEG and PVA, which may be optimized for the separation of organic acids from water, and copolymeric PAN-grafted PVA membranes, which may be optimized for the separation of DMF from water, and methods of making such membranes. Use of such membranes in pervaporation and pervaporation devices containing such membranes. Use of such membranes alone or in combination with ion-exchange membranes for recovery of organic compounds or for water purification applications such as production of potable water or industrial waste treatment. The membranes of the present invention may be used to remove trace amounts of water from organic compounds.
REFERENCES:
patent: 2953502 (1960-09-01), Binning et al.
patent: 4911844 (1990-03-01), Linder et al.
patent: 4968430 (1990-11-01), Hildenbrand et al.
patent: 5156740 (1992-10-01), Bruschke
patent: 5334314 (1994-08-01), Neel et al.
patent: 0436128 (1990-12-01), None
Fernandez, et al., “Grafting of Vinyl Acetate-Methyl Acrylate Mixture onto Cellulose. Effect of Ceric Ion and Nitric Acid Concentrations”, Journal of Applied Polymer Science, vol. 41, p. 2221-2240, 1990.
Bhat, et al., “Methanol-selective membranes for the pervaporative separation of methanol-toluene mixtures”, Journal of Membrance Science, 167, pp. 187-201, 2000.
Aminabhavi, et al., “A study of sorption/desorption profiles and diffusion anomalies of organic haloalkanes into a polymeric blend of ethylene-propylene random copolymer and isotactic polypropylene”, Polymer vol. 37, No. 9; pp. 1677-1684, 1996.
Neel, et al., “Influence of Downstream Pressure on the Pervaporation of Water-Tetrahydrofuran Mixtures Through a Regenerated Cellulose Membrane (Cuprophan)”, Journal of Membrane Science, 27, pp. 217-232, 1986.
Mulder, et al., “Preferential Sorption Versus Preferential Permeability in Pervaporation”, Journal of Membrane Science, 22, pp. 155-173, 1985.
Huang, et al., “Characteristics of sodium alginate membranes for the pervaporation dehydration of ethanol-water and isopropanol-water mixtures”, Journal of Membrane Science, 160, pp. 101-113, 1999.
Kurkuri, et al., “Systheses and Characterization of Blend Membranes of Sodium Alginate and Poly(vinyl alcohol) for the Pervaporation Separation of Water + Isopropanol Mixtures”, Journal of Applied Polymer Science, vol. 86, pp. 3642-3651, 2002.
Yang, et al., “Effects of Ca2+ bridge cross-linking on structure and pervaporation of cellulose/alginate blend membranes”, Journal of Membrane Science, 175, pp. 53-60, 2000.
Toti, et al., “Pervaporation Separation of Water-Isopropyl Alcohol Mixtures with Blend Membranes of Sodium Alginate and Poly(acrylamide)-Grafted Guar Gum”, Journal of Applied Polymer Science, vol. 85, pp. 2014-2024, 2002.
Moon, et al., “Novel two-ply composite membranes of chitosan and sodium alginate for the pervaporation dehydration of isopropanol and ethanol”, Journal of Membrane Science, 156, pp. 17-27, 1999.
Wang, Xin-Ping, “Modified alginate composite membranes for the dehydration of acetic acid”, Journal of Membrane Science, 170, pp. 71-79, 2000.
Bhagat, et al., “Kinetics and Mechanism of Drug Release from Calcium Alginate Membrane Coated Tablets”, Drug Development and Industrial Pharmacy, 20(3), pp. 387-394, 1994.
Kikuchi, et al., “Effect of Ca2+ -alginate gel dissolution on release of dextran with different molecular weights”, Journal of Controlled Release, 58, pp. 21-28, 1999.
Kumaresh, et al., “Chemically modified polyacrylamide-g-guar gum-based crosslinked anionic microgels as pH-sensitive drug delivery systems: preparation and characterization”, Journal of Controlled Release, 75, pp. 331-345, 2001.
Tomihata, et al., “Crosslinking of Hyaluronic Acid with Glutaraldehyde”, Journal of Polymer Science: Part A: Polymer Chemistry, vol. 35, pp. 3553-3559, 1997.
Chiang, et al., “Separation of Liquid Mixtures by Using Polymer Membranes. I.. Water-Alcohol Separation by Pervaporation through PVA-g-MMA/MA Membrane”, Journal of Applied Polymer Science, vol. 43, pp. 2005-2012, 1991.
Li, et al., “Pervaporation of Water/THF Mixtures using Zeolite Membranes”, Ind. Eng. Chem. Res., 40, pp. 4577-4585, 2001.
Yeom, et al., “Characterization of Relaxation Phenomena and Permeation Behaviors in Sodium Alginate Membrane During Pervaporation Separation of Ethanol-Water Mixture”, Journal of Applied Polymer Science, vol. 62, pp. 1561-1576, 1996.
Shieh, et al., “Chitosan/N-methalol nylon 6 blend membranes for the pervaporation separation of ethanol-water mixtures”, Journal of Membrane Science, 148, pp. 243-255, 1998.
Huang, et al., “Crosslinked chitosan composite membrane for the pervaporation dehydration of alcohol mixtures and enhancement of structural stability of chitosan/polysulfone composite membranes”, Journal of Membrane Science, 160, pp. 17-30, 1999.
Jo, et al., “Separation of Water-Ethanol Mixture through Poly(acrylonitrile-co-Acrylic acid)/Poly(ethylene Oxide) Membranes by Prevaporation”, Journal of Applied Polymer Science, vol. 51, pp. 529-535, 1994.
Kim, et al., “Pervaporation separation of water from ethanol-through polymide composite membranes”, Journal of Membrane Science, 169, pp. 81-93, 2000.
Lee, et al., “Dehydration of ethanol/water mixtures by pervaporation with composite membranes of polyacrylic acid and plasma-treated polycarbonate”, Journal of Membrane Science, 164, pp. 13-23, 2000.
Kurkuri, et al., “Synthesis and Characterization of Polyacrylamide-Grafted Sodium Alginate Copolymeric Membranes and their use in Pervaporation Separation of Water and Tetrahydrofuran Mixtures”, Journal of Applied Polymer Science, vol. 86, pp. 272-281, 2002.
Aminabhavi, et al., “Pervaporation Separation of Water/Dimethylformamide Mixtures using Poly(vinyl-alcohol)-g-polyacrylamide Copolymeric Membranes”, Journal of Applied Polymer Science, vol. 83, pp. 273-282, 2002.
Mino, et al., “A New Method for the Preparation of Graft Copolymers. Polymerization Initiated by Ceric Ion Redox Systems”, Journal of Polymer Science, vol. 31, Issue No. 22, pp. 242-243, 1958.
Yeom, et al., “Characterization of Sodium Alginate Membrane Crosslinked with Glutaraldehyde in Pervaporation Separation”, Journal of Applied Polymer Science, vol. 67, pp. 209-219, 1998.
Yeom, et al., “Characterization of Sodium Alginate and Poly(vinyl alcohol) Blend Membranes in Pervaporation Separation”, Journal of Applied Polymer Science, vol. 67, pp. 949-959, 1998.
Huang, et al., “Pervaporation dehydration of aqueous ethanol and isoporpanol mixtures through alginate/chitosan two ply composite membranes supported by poly(vinylidene fluoride) porous membrane”, Journal of Membrane Science, 167, pp. 275-289, 2000.
Chatterji, Prabha R., “Glutaraldehyde Crosslinked Gelatin with Polyacrylamide Grafts”, J. Macromol. Sci.-Chem., A27(4), pp. 435-443, 1990.
Binning, et al., “Separation of Liquid Mixtures by Permeation”, Ind. Eng. Chem, vol. 53, No. 1, pp. 45-50, 1961.
Aminabhavi, et al., “Synthesis of Graft Copolymeric Membranes of Poly(vinyls alcohol) and Polyacrylamide for the Pervaporation Separation of Water/Acetic Acid Mixtures”, Journal of Applied Polymer Science, vol. 83, pp. 244-258, 2002.
Burshe, et al., “Pervaporative Dehydration of Organic Solvents”, Separation Science and Technology, vol. 32(8), pp. 1335-1349, 1997.
Nam, et al., “Pervaporation separation of methanol/methylt-butyl ether through chitosan composite membrane modified with surfactants”, Journal of Membrane Science, 157, pp. 63-71, 1999.
Ping, et al., “Pervaporation of W
Aminabhavi Tejraj M.
Kulkarni Padmakar V.
Kurkuri Mahaveer
Baker & Botts L.L.P.
Drodge Joseph
Menon K S
Seventy-Seventh Meridian Corporation LLC
LandOfFree
Pervaporation membranes and methods of use does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Pervaporation membranes and methods of use, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pervaporation membranes and methods of use will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3585867