Abstract:
There is provided macrostructures of porous inorganic material which can have controlled size, shape, and/or porosity and a process for preparing the macrostructures. The macrostructures comprise a three-dimension network of particles of porous inorganic materials. The process for preparing the macrostructures involves forming an admixture containing a porous organic ion exchanger and a synthesis mixture capable of forming the porous inorganic material and then converting the synthesis mixture to the porous inorganic material. After formation of the composite material, the porous organic ion exchanger can be removed from the composite material to obtain the macrostructures.
Abstract:
A method for generating composite materials and devices from these materials for the filtration, purification, and processing of fluids, water, or other solutions containing microbiological or chemical contaminants, such as fluids containing cysts, bacteria, and/or viruses and inorganic and/or organic contaminants, where the fluid is passed through or over a composite purification material composed of non-expandable and expandable matter that swell through the absorption of fluid.
Abstract:
Disclosed is a method for producing an acid sensitive liquid composition. The method involves passing an acid sensitive liquid composition containing a carbonate represented by the formula ROC(═O)OR1 wherein R and R1 independently are a hydrocarbyl group of 1 to about 10 carbon atoms, through at least one of the following two filter sheets: (a) a filter sheet containing a self-supporting fibrous matrix having immobilized therein a particulate filter aid and a particulate ion exchange resin having an average particle size of from about 2 to about 10 microns, wherein the particulate filter aid and ion exchange resin particles are distributed substantially uniformly throughout a cross-section of said matrix; and/or (b) a filter sheet containing a self-supporting matrix of fibers having immobilized therein particulate filter aid and binder resin, and having an average pore size of about 0.05 to 0.5 &mgr;m. Also disclosed is a method for treating a film of a photoresist composition disposed on a surface, which involves contacting the photoresist composition with an acid sensitive liquid composition prepared by the aforementioned method, in an amount sufficient to produce a substantially uniform film thickness of the photoresist composition across the film surface.
Abstract:
Composite media, systems, and devices for substantially removing, or otherwise processing, one or more constituents of a fluid stream. The composite media comprise a plurality of beads, each having a matrix substantially comprising polyacrylonitrile (PAN) and supporting one or more active components which are effective in removing, by various mechanisms, one or more constituents from a fluid stream. Due to the porosity and large surface area of the beads, a high level of contact is achieved between composite media of the present invention and the fluid stream being processed. Further, the homogeneity of the beads facilitates use of the beads in high volume applications where it is desired to effectively process a large volume of flow per unit of time.
Abstract:
A filter canister for use within a storm water sewer system. The filter canister includes a hollow retention body and a lower tapered filter. The retention body defines a top and a bottom, and is positionable within the storm water sewer system so as to direct fluid flow from the top to the bottom. The lower tapered filter defines a vertex end and a base. The lower tapered filter is attached to the bottom of the retention body such that the vertex end extends upwardly toward the top. In one preferred embodiment, a pelletized treatment media, such as peat-based, activated carbon-like pellets, is contained within the retention body. During use, the treatment media removes contaminants from water flow entering the filter canister. The lower tapered filter directs the removed contaminants toward an outer periphery such that the accumulated contaminants have minimal effect on a flow rate capacity of the filter canister.
Abstract:
An ion exchange resin comprising an ion exchange material dispersed or distributed throughout a polyurethane matrix. The ion exchange material is typically a second polymer which has been chemically modified after dispersion or distribution throughout the polyurethane matrix.
Abstract:
1. IN THE MANUFACTURE OF A COMPOSITION ION EXCHANGE ABSORBENT CAPABLE OF BEING REGENERATED BY ELUTION WITH WATER OR SALINE AQUEOUS SOLUTION AT A TEMPERATURE EXCEEDING THAT EMPLOYED IN THE ADSORPTION STAGE, SAID ABSORBENT BEING IN THE FORM OF BEDS COMPRISING WEAKLY ACIDIC AND WEAKLY BASIC ION EXCHANGE MATERIALS DISPERSED IN A MATRIX OF A CROSS-LINKED POLUVINYL ALCOHOL OBTAINED BY FORMING A DISPERSION OF SAID ION EXCHANGE MATERIAL IN A MEDIUM COMPRISING POLYVINYL ALCOHOL AND A GLUTARALDEHYDE CROSSLIKING AGENT AND CURING, THE IMPROVEMENT WHEREBY BEADS OF INCREASED STRENGTH AND INCREASED RATE OF ION EXCHANGE ARE OBTAINED, SAID IMPROVEMENT CONSISTING OG CARRYING OUT THE CURING OF SAID BEADS WITH THE BEADS IN A SOLVENT SWOLLEN CONDITION AT A TEMPERATURE OF 80* -150* C. AND A PH IN THE RANGE OF FROM -1 TO 2.
Abstract:
POROUS, CELLULAR STRUCTURES WHICH HAVE BEEN AT LEAST PARTIALLY CARBONIZED, WHICH HAVE GREATER STRENGTH AT HIGH TEMPERATURES, AND WHICH ARE CAPABLE OF WITHSTANDING HIGHER TEMPERATURES THAN COULD THE STRUCTURES PRIOR TO PYROLYSIS. A METHOD FOR FORMING THE ABOVE STRUCTURES IN WHICH A FIRST BASIC STRUCTURE HAVING A DESIRED CONFIGURATION AND COMPRISES OF MATERIAL HAVING A LOW FUSION OR DETERIORATION TEMPERATURE IS COATED AT EVEN LOWER TEMPERATURES WITH AN INFUSIBLE RESIN WHICH IS CAPABLE OF BEING CURED TO AN INFUSIBLE STATE AT A TEMPERATURE LOWER THAN THE FUSION OR DETERIORATION TEMPERATURE OF THE MATERIAL COMPRISING THE FIRST BASIC STRUCTURE, AND THE RESULTING COATED STRUCTURE, IS THEN SUBJECTED TO ELEVATED TEMPERATURES SO THAT THE BASIC STRUCTURE IS PYROLYZED AND CARBONIZED LEAVING A STRONGER, HIGH-TEMPERATURE-RESISTANT STRUCTURE SUBSTANTIALLY IN THE IMAGE OF THE FIRST BASIC STRUCTURE.
Abstract:
A packing for fluid treatment, either gaseous or liquid, for various surface contact effects such as drying of the fluid, heat exchange, ion exchange, molecular sieve separations and the like, wherein a laminated cellular structure of paper is coated throughout the cellular structure with a hard resin such as an epoxy resin in which such resin coating can be used alone for heat exchange purposes, or it can be further coated with dry solids to effect many of the fluid modifications.