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4606827 |
Method for separating and recovering color developing agent
A method and apparatus for separating and recovering a color developing solution from a color photographic processing solution with the aid of a cation exchange resin are disclosed. Said solution...
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4599225 |
Continuous flow separation with moving boundary sorption
A continuous process for separating components of a fluid mixture is disclosed which comprises forming a sorption zone and a desorption zone, said zones being separated by a boundary of a sorbent...
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4591439 |
Ion exchange process and apparatus
A device and process are disclosed for continuously removing cations from an aqueous solution by means of two compartment ion exchanger wherein one compartment cation exchange membrane material...
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4585627 |
Process for the concentration of uranium from sea water
A process for the selective concentration of uranium from sea water through chemical accumulation onto a solid adsorption medium, which does not necessitate any H + ions for regeneration, in...
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4572788 |
Treatment of contaminated Stretford solution
A side-stream portion of a Stretford Process solution is taken from the main-stream in order to reduce the amount of deleterious side-products in the solution and the ADA values and vanadium values...
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4568465 |
Water treatment system and control therefor
A water treatment system includes a water treatment tank containing a resin bed through which water is passed for treatment thereof during normal operation of the treatment system. A brine tank...
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4568466 |
Method for pretreating aqueous solutions with weakly acidic cation exchange resins
A method for treating aqueous solutions by ion exchange uses a weakly acidic cation exchange resin to remove ammonia and other volatile amines along with corrosion products and metal ion leakage...
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4558022 |
Regeneration of caustic impregnated activated carbons
An improved process for the regeneration of activated carbon impregnated with caustic is described. A three stage wash with caustic solutions of from 30 to 50 percent and from 5 to 25 percent...
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4556463 |
Process for removing sulphate from electrolysts brine
Sulfate impurities are removed from alkali metal chloride brine electrolysis cell effluent by diluting the effluent to an alkali metal chloride content of less than 150 grams per liter and then...
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4555344 |
Method of size-selective extraction from solutions
A separation method utilizing the ability of cross-linked ionic polymer gels to selectively extract solvent from a solution of a macromolecular material. A feed solution containing macromolecules...
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4549966 |
Method of removing organic contaminants from aqueous compositions
A method is provided of removing organic contaminants from an aqueous composition contaminated therewith. The method comprises contacting the aqueous composition with a sufficient amount of...
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4548717 |
Method for treating aqueous solutions with weakly acidic cation exchange resins
A method for treating aqueous solutions by ion exchange uses a weakly acidic cation exchange resin and a strongly basic anion exchange resin to remove ammonia and other volatile amines along with...
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4540493 |
Process for treating wash water from the manufacture of terephthalic acid
A process for treating wash water from the manufacture of terephthalic acid, wherein the wash water includes terephthalic acid, metal catalyst, and organic acid byproducts. The process includes the...
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4517096 |
Method of selective separation and concentration of gallium and/or indium from solutions containing low levels of them and high levels of other metal ions
A novel method is disclosed which enables gallium and/or indium to be selectively separated and concentrated from a solution containing them in very low concentrations together with many other...
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4514504 |
Monitoring method for polyacrylic acids in aqueous systems
A quantitative method useful for field monitoring low concentrations of water soluble, polyacrylic acids in aqueous systems containing polyacrylic acids and other soluble ionic materials, such as...
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4495080 |
Method for preparing a cation exchanger
There is described a method for preparing a cation exchanger to remove metals from liquids they are contained in, which comprises adding to a silicic acid medium with a molecular weight which is...
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4479877 |
Removal of nitrate from water supplies using a tributyl amine strong base anion exchange resin
The invention relates to a method for separating nitrate from waters containing a significant amount of sulfate ion. Nitrate removal is accomplished by passing the water to be treated through a bed...
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4474663 |
Method of regenerating gels for use in liquid chromatography
This invention provides an industrially advantageous method of regenerating a large quantity of contaminated gels by treating a contaminated gel which has become less active in separation...
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4467126 |
Process for the separation of di-substituted benzene
An adsorptive separation process for separating the para-isomers of a di-substituted benzene from a feed mixture comprising the para-isomer and at least one other isomer. One substituted group is...
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4451381 |
Composite plug for stake-hole of salt blocks, salt block product, and method of using same
A salt block product and method of making and using same of a type suitable for use in forming a brine for regenerating and rejuvenating water conditioning ion exchange beds comprising integral...
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4451375 |
Iodine adsorption via picolylamine ion exchange resins
Resins bearing picolylamine moieties selectively adsorb iodide ions from acidic aqueous solutions. The iodide can be readily eluted from the resin with base. Particularly useful resins are obtained...
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4450057 |
Process for removing aluminum and silica from alkali metal halide brine solutions
A process for removing dissolved aluminum and silica contaminants from concentrated alkali metal halide brines used in membrane electrolytic cells is disclosed. The process involves contacting an...
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4444666 |
Method of removing antimony from an antimony-containing copper electrolyte
The antimony in an antimony-containing copper electrolyte is removed by contacting the antimony-containing copper electrolyte with activated carbon at between room temperature and 60° C.
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4443267 |
Method and apparatus for the continuous separation of fructose from glucose starting from invert sugar or from isomerized glucose syrups
A method for separating fructose from glucose in mixture containing both sugars is disclosed, wherein the separation is carried out with anion-exchange resins in bisulfite form in a 3-column-system...
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4432944 |
Ion exchange recovery of uranium
A process for recovering soluble uranium with an anion exchange system from carbonate-containing water. The process includes means for overcoming the deleterious effects upon the ion exchange...
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4431580 |
Method for purifying a nitric-acid U/Pu solution
Purifying a nitric acid solution containing U/Pu ions and contaminated by metal impurities by (a) oxidizing the U/Pu ions of the solution to the hexavalent form, (b) conducting the solution...
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4422881 |
Installation and process for the continuous separation of mixtures of sugars and/or of polyols by selective adsorption
The invention relates to a process for continuous separation of mixtures of sugars and/or polyols. The mixture is fed to an installation comprised of at least 3 adsorbent filled columns connected...
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4411794 |
Process for the purification of the blood clotting factors, II, VII, IX and/or X
A process for purifying liquids containing blood clotting factors by adsorption of the factors on mineral adsorbents such as calcium phosphate, aluminum hydroxide gel, barium sulfate or...
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4407717 |
Wastewater treatment process
A process for treating wastewaters with a powdered adsorbent and one or more fixed media filters, wherein biological oxidation occurs. The adsorbent is optionally regenerated and reused. In...
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4400305 |
Adsorbents comprising hydrated ferrites of Ti, Zr, and Sn and cured thermosetting resins
An adsorbent, which has been prepared by mixing (a) one part by weight of (i) at least one member selected from the group consisting of hydrated ferrites of titanium, zirconium and tin or (ii) a...
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4391714 |
Process for removing molybdenum from aqueous salt solutions
The disclosure relates to a process for removing molybdenum from aqueous salt solutions by adsorbing it on manganese dioxide. To this end, the salt solution is contacted with a bed of manganese...
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4389253 |
Process for removing crud from ion exchange resin
In discarding the used ion exchange resin by the demineralizer provided in the cooling system of an atomic reactor, the radioactivity-rich ion exchange resin and the radioactivity-rich crud can be...
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4378439 |
Purification of saline solutions
A process for the demineralization of a bicarbonate- or bisulphite-bearing saline solution by means of amphoteric thermally regenerable ion-exchange resins and comprising the regeneration of the...
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4377483 |
Method of removing dissolved heavy metals from aqueous waste liquids
A powder of a slag formed at the time of manufacturing steel is used to remove heavy metals contained in waste water. After the use the slag may be heated to recover the heavy metals adsorbed...
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4364909 |
Removal of Ca.sup.++ from MgCl.sub.2
Removal of Ca + + values from MgCl 2 brine is accomplished by use of a crystalline zeolite structure of the empirical formula Na 12 [(AlO 2 ) 12 (SiO 2 ) 12 ].nH 2 O, where nH 2 O represents...
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4362626 |
Ion exchanger of hydrated oxide of Ti, Zr, or Sn and cured polyester, and exchange method
An adsorbent, which is prepared by subjecting to curing a mixture consisting of (a) one part by weight of at least one member selected from the group consisting of titanium oxide hydrate, zirconium...
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4344851 |
Phillipsite-type zeolites for ammonia adsorption
Ammonium ions are selectively removed from aqueous solutions containing calcium cations by cation exchange with natural or synthetic zeolites of the phillipsitegismondite type, which possess...
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4341636 |
Treatment of wastewater
Process for treating wastewater, which includes measuring the pH of the wastewater, adjusting the pH to about 10-11; filtering the wastewater; and subjecting the wastewater to ion-exchange...
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4336102 |
Method for recovery and reuse of ammonia in ammonia-base sulfite cooking liquors
A method for recovering ammonia from spent ammonia-base sulfite pulping liquor includes steam stripping spent ammonia and condensing the resulting vapor to produce a dilute ammonia or ammonium...
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4332623 |
Adsorption separation method and apparatus thereof
A method for separating a starting fluid containing at least one component which is easy to adsorb and at least one component which is hard to adsorb into the respective components by the use of an...
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4332031 |
Silica removal process and alumina composition used therein
Silica is selectively removed from aqueous liquid containing a relatively large amount of borate (or boric acid) and a relatively small amount of silica using borate loaded alumina as the sorbant....
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4328105 |
Treatment of suspended solids--and adsorbable contaminant--containing liquid
A process for removal of suspended solids and adsorbable contaminants from an influent liquid containing same. A filter bed of porous polyurethane particles is provided, and a particulate adsorbent...
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4314905 |
Columnar fine mesh magnetized ion exchange resin system
A method and apparatus for water softening using less than approximately 20 micron diameter fine mesh magnetized ion exchange particles in columnar operation. The particles are formed by...
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4303704 |
Selective removal of copper or nickel from complexing agents in aqueous solution
A method is provided for selectively separating and removing complexed heavy metal ions, preferably copper or nickel, from complexing agents in aqueous solution and removing substantially all heavy...
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4268396 |
Oil recovery apparatus and method
An oil recovery apparatus and method, particularly for removing oil and grease from the discharge of dishwashing machines or the like, provides a small size assembly employing the same principle as...
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4267055 |
Separation of more planar molecules from less planar molecules
Planar organic molecules, such as divinylbenzene or para-dioxin molecules, are adsorbed from mixtures of planar and non-planar molecules, such as commercial divinylbenzenes containing non-planar...
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4264373 |
Method of refining beet juice
A method of refining beet juice containing a colorant wherein the beet juice is contacted with an adsorbent composed of a dehydrated solid of a coprecipitated substance formed by insolubilizing...
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4256587 |
Siliceous adsorbent for heavy metals
A low cost, effective method for removing heavy metal ions from aqueous solution which utilizes a porous, high surface-to-weight ratio siliceous adsorbent comprises the steps of activating the...
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4252643 |
Removal of toxic and odorous organics from waste water by saturated activated carbon
An adsorption process for the selective removal of naphthalenic hydrocarbons in the waste water from a petrochemical operation which comprises contacting the effluent waste water for relatively...
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4235715 |
Process for removing alkalinity and hardness from waters
Raw water is fed to a first column containing a weak acid cation exchange resin in hydrogen form where alkalinity causing ions and hardness causing ions to the extent of alkalinity are converted to...
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