Absorbents And Adsorbents Patents (Class 34/DIG1)
  • Patent number: 5733841
    Abstract: Solid gas-drying forms are made by heating drying salts with a polar solvent to form a saturated solution, then cooling, freezing and forming. Preferred salts are combinations of calcium and lithium bromides and chlorides in particularly effective molar ratios.
    Type: Grant
    Filed: December 18, 1996
    Date of Patent: March 31, 1998
    Assignee: Clearwater, Inc.
    Inventor: Todd R. Thomas
  • Patent number: 5104594
    Abstract: A surface of a fresh concrete body is dried by first covering the surface to be dried with a layer of bibulous granules having a great internal surface area for a time sufficient to draw generally all of the water out of the body via the surface and then preventing water from entering the layer from its side turned away from the body. The granules are finely divided hygroscopic particles, with an internal surface area of at least 200 m.sup.2 /g, preferably at least 800 m.sup.2 /g. The hydrophilic particles take up the moisture from the concrete and hold it in the layer of particles lying on the surface. This reduces the partial vapor pressure on the surface of the concrete body which effectively draws further liquid out of the concrete. The particles are a mixture of a cross-linked polymer that only swells in water and silica. The particles are carried in a coherent mat and are applied as a layer to the surface by laying the mat thereon.
    Type: Grant
    Filed: January 19, 1990
    Date of Patent: April 14, 1992
    Assignee: Hochtief Aktiengesellschaft Vorm. Gebr. Helfmann
    Inventors: Bernd Hillemeier, Claus Flohrer, Andreas Schaab
  • Patent number: 4853148
    Abstract: A process for drying a gaseous hydrogen halide of the formula HX, wherein X is selected from the group consisting of bromine, chlorine, fluorine, and iodine, to remove water impurity therefrom, comprising:contacting the water impurity-containing gaseous hydrogen halide with a scavenger including a support having associated therewith one or more members of the group consisting of:(a) an active scavenging moiety selected from one or more members of the group consisting of:(i) metal halide compounds dispersed in the support, of the formula MX.sub.y ; and(ii) metal halide pendant functional groups of the formula -MX.sub.
    Type: Grant
    Filed: March 24, 1987
    Date of Patent: August 1, 1989
    Assignee: Advanced Technology Materials, Inc.
    Inventors: Glenn M. Tom, Duncan W. Brown
  • Patent number: 4645698
    Abstract: A dehydrating and water-retaining sheet comprising a water-absorbing agent, a wetting agent having a water-absorbing property, and a water-permeable membrane, in which the water-absorbing agent and the wetting agent are at least partially wrapped together in the water-permeable membrane.
    Type: Grant
    Filed: May 9, 1985
    Date of Patent: February 24, 1987
    Assignee: Showa Denko Kabushiki Kaisha
    Inventor: Mamoru Matsubara
  • Patent number: 4565553
    Abstract: An industrial painting method and system utilizing a washer, dry-off oven, spray booth, and bake oven, in which solvent paint vapors from the spray booth are concentrated in a filter which is subsequently degassed by a flow of hot air from the dry-off oven, and the degassed vapors admixed with the atmosphere of the bake oven. The bake oven atmosphere is continuously circulated to the washer and burned in the burner of the washer to incinerate solvent vapors, and the gasses produced by incineration are transported to the dry-off oven to form the atmosphere thereof. The principal exhaust from the system occurs from the dry-off oven and is substantially free of solvent vapors and of low temperature.
    Type: Grant
    Filed: May 24, 1984
    Date of Patent: January 21, 1986
    Inventor: William C. Nowack
  • Patent number: 4548847
    Abstract: The invention comprises of an anionic polyelectrolyte hydrogel reversibly cross-linked with a polyvalent metal cation having a valence of at least two. This hydrogel may be combined with a removal agent for imparting delayed swelling characteristics when contacted with a water-containing fluid. The delayed swelling allows the water-containing fluid to penetrate or permeate the system before swelling is initiated, thereby providing enhanced wetting prior to the onset of swelling and alleviating gel blockage.
    Type: Grant
    Filed: January 9, 1984
    Date of Patent: October 22, 1985
    Assignee: Kimberly-Clark Corporation
    Inventors: Gerard M. Aberson, Gerard J. F. Ring
  • Patent number: 4210460
    Abstract: A spill of hydrofluoric acid is controlled and cleaned up by being treated with a composition comprising an aqueous solution of calcium acetate and applying to the resulting precipitate an activated composition of powdered magnesia and an appropriate normally solid pH indicator.
    Type: Grant
    Filed: October 22, 1975
    Date of Patent: July 1, 1980
    Assignee: J. T. Baker Chemical Company
    Inventor: James W. Seidenberger
  • Patent number: 4174292
    Abstract: A spill of acid is controlled and cleaned up by being neutralized by a low metal ion fluid neutralizer composition formed of a non-volatile organic amine compound, a foam-forming surfactant and a pH indicator dye and which can additionally contain water, a dissolved gas and color tinting agents. Such a neutralizer composition is especially useful in the electronics manufacturing industry and in clean rooms where the presence of metal ions would be deleterious.
    Type: Grant
    Filed: March 20, 1978
    Date of Patent: November 13, 1979
    Assignee: J. T. Baker Chemical Company
    Inventors: James W. Seidenberger, Francis W. Michelotti