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4390508 |
Process for recovery of aluminum oxide from aluminum compounds containing fluorine
A process for the production of aluminum oxide from aluminum compounds containing fluorine comprising: (1) extracting aluminum ions with an organic solvent containing one or more compounds...
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4388224 |
Molybdenum-exchanged crystalline aluminosilicate zeolite
Molybdenum is ion exchanged into a crystalline aluminosilicate zeolite, replacing metals such as sodium, calcium, and potassium, by contacting the zeolite with an aqueous solution containing...
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4381255 |
Binderless zeolite extrudates and method of producing
Binderless zeolite sieve extrudates are made by extruding a mixture containing about 40-60% zeolites with the remainder being a metakaolin clay that has mixed with it about 90-120% of the...
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4381256 |
Method of producing binderless zeolite extrudates
An improved method of making binderless zeolite sieve extrudates. After extruding a mixture containing about 40-60% zeolites with the remainder being a metakaolin clay that has mixed with it about...
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4372922 |
Process for the recovery of indium
The invention is directed to a process for the recovery of indium contained as an impurity in aqueous solutions in concentrations less than 1 gram per liter, by extracting indium from an aqueous...
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4372923 |
Purification of solutions of gallium values by liquid/liquid extraction
Highly pure (>99.99%) aqueous solutions of gallium chloride are obtained by (i) liquid/liquid extracting an aqueous hydrochloric acid solution of gallium values with an organic phase which...
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4369166 |
Purification of solutions of gallium values by liquid/liquid extraction
Highly pure (>99.99%) aqueous solutions of gallium chloride are obtained by (i) liquid/liquid extracting an aqueous hydrochloric acid solution of gallium values with an organic phase which...
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4366129 |
Process for producing alumina and ferric oxide from aluminium carriers with high iron and silicon content
The invention concerns a process for the preparation of alumina and ferric oxide from low-grade aluminium and iron carriers. The processes, in addition to conventional technological steps,...
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4347164 |
Mono- and poly-metallic supported catalysts
A zeolite containing catalyst which is associated with finely dispersed metal is formed by decomposing a compound, whose anion contains a metal and a (CN) radical, which has been deposited on the...
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4344924 |
Solvent extraction of chromium and vanadium
Chromium and vanadium can be co-extracted from alkaline solutions or leach liquors containing these metals using quaternary amine solvent mixtures. The alkaline leach liquors usually are derived by...
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4334999 |
Process for the extraction of metal ions
A process for extracting metal ions from a water insoluble metal base or salt dispersed in an aqueous solution using liquid ion exchange is described. The liquid ion exchange extractant is an alkyl...
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4298380 |
Process for purifying low-melting metals from impurities
According to the invention a process is proposed for purifying low-melting metals from impurities, residing in that a melt of a low-melting metal is treated with an aqueous solution of an inorganic...
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4293333 |
Microbiological recovery of metals
A process for recovering metals from aqueous media containing metal in solution, and especially from industrial waste water. The process includes the steps of contacting the aqueous medium with...
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4293334 |
Recovery of metals
A process for the recovery of valuable metals or their compounds from an aqueous medium, such as a metals refinery process waste solution. Metals are recovered in water-insoluble form from aqueous...
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4292284 |
Solvent extraction recovery process for indium
Indium is recovered effectively from an aqueous leached solution containing indium ions, together with other ions such as ferric ions, zinc ions, etc. if any, by adjusting the pH of the aqueous...
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4289531 |
Process for recovering precious metals
Platinum, palladium and other precious metals are recovered from aqueous media containing precious metal ions in solution by contacting the metal-containing solution with a proteinaceous material...
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4287071 |
Simultaneous extraction of more than one ion by liquid membrane process
A liquid membrane process for removing ions from solution which comprises contacting a solution containing a first ion and a second ion with an emulsion, said emulsion comprising an external phase...
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4282189 |
Precipitation of metal values from organic media
Metal values, such as iron, may be stripped from an organic liquid medium loaded with metal ions by a process which comprises contacting the organic medium with an aqueous phase at a contact...
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4278640 |
Method for solvent extraction of metallic mineral values from acidic solutions
Solvent extraction of metallic mineral values from aqueous acidic solutions is improved by introducing a fine dispersion of air bubbles into the acid-extractant mixture to cause solid material...
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4255276 |
Silicatic complexing agent for alkaline earth ions and method of preparing same
A silicatic complexing agent for alkaline earth ions comprising an acid activated mineral of the montmorillonite-beidellite series, said mineral charged with an alkali metal.
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4254088 |
Salt-soda sinter process for recovering aluminum from fly ash
A method for recovering aluminum values from fly ash comprises sintering the fly ash with a mixture of NaCl and Na 2 CO 3 to a temperature in the range 700°-900° C. for a period of time...
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4252777 |
Recovery of aluminum and other metal values from fly ash
The invention described herein relates to a method for improving the acid leachability of aluminum and other metal values found in fly ash which comprises sintering the fly ash, prior to acid...
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4242313 |
Processes for the recovery of alumina from fly ash and production of cement constituents
Processes for the production of alumina and cement constituents from fly ash, in which the fly ash is subjected to magnetic separation removing magnetic constituents; the remaining non-magnetic...
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4242127 |
Process for treating hydroxide sludge residues containing nonferrous metals
A method for processing a hydroxide sludge residue to separate and recover the nonferrous metal values therefrom including the steps of (1) concentrating the residue and acidifying and heating...
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4240932 |
Exchanged mordenite catalysts and processes for producing the same
This invention relates to exchanged mordenite and catalysts employing the same.
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4241029 |
Liquid/liquid extraction of gallium values from basic aqueous solutions thereof
Gallium values are recovered from basic aqueous solutions thereof, especially from sodium/aluminum liquors of Bayer process origin, by liquid/liquid extraction with a water immiscible organic phase...
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4233273 |
Selective extraction of iron and aluminum from acidic solutions
A method is provided for extracting at least one of the trivalent ions Fe and Al from an acid solution. The method comprises uniformly mixing the acid solution with a liquid organic extractant...
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4230678 |
Process for recovering aluminum from alunite
An improvement in processes for recovering aluminum from alunite ore which processes include roasting the ore to remove water of hydration, removing sulfur and potassium compounds from the roasted...
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4224287 |
Process for the preparation of pure aluminum oxide
In the process for the preparation of pure aluminum oxide by the steps of hydrochloric acid decomposition of mechanically or thermally activated clay or alumina containing minerals, separating the...
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4215016 |
Exchanged faujasite zeolite catalyst containing same and process for producing same
Exchanged zeolite of the faujasite type is produced by exchanging the sodium zeolite at super atmospheric pressures at temperatures below about 500° F. with salt solutions in ratios of cations in...
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4193968 |
Process for recovering gallium
The invention provides a process for recovering gallium from calcined clay leached with hydrochloric acid. The leach solution containing aluminum, ferric and gallium chlorides is treated by ion...
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4192778 |
Rare earth exchange faujasite zeolite catalyst containing same and process for producing same
A rare earth exchanged zeolite of the faujasite type in which the equivalent of Na is less than 0.1 and the rare earth is at least 0.9 equivalents per gram atom of aluminum and catalysts including...
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4176042 |
Method of treating shales
Kerogen-containing shale is crushed and comminuted to a fineness sufficient to free kerogen and any sulphides present in said shale. To enable the shale to be finely-divided more readily, the...
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4175057 |
Zeolite composition
This case relates to a process for producing aromatics by contacting a C 3 -C 8 hydrocarbon with a gallium catalyst supported on an aluminosilicate in which the ratio of silica to alumina is...
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4172879 |
Ferric iron removal from aluminum fluoride solutions
A process for the selective separation of ferric iron from an aluminum fluoride aqueous solution containing ferric iron is effected by contacting said solution with an organic extractant phase...
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4169809 |
Extractive purification of carboxylic acids containing monovalent and trivalent thallium carboxylates
A process is provided for extracting monovalent thallium and alkali metal values from a liquid medium containing a carboxylic acid having limited solubility in water and containing dissolved...
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4166097 |
Extractive recovery of trivalent thallium values from aqueous solutions
Trivalent thallium values are extractively recovered from aqueous media containing dissolved trivalent and monovalent thallium values by treating the aqueous medium with an extractant comprising a...
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4164483 |
Rare earth exchange X zeolites, catalyst employing the same and method for producing the same
This invention relates to the preparation of rare earth exchanged X type faujasite zeolites in which the Na content is reduced by exchange with rare earth cations to introduce in excess of about...
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4153452 |
Recovery of metals from bimetallic salt complexes
Metals are recovered from waste materials that contain an organic component and a bimetallic salt complex component that comprises complexes having the formula M I M II X n .Aromatic and/or the...
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4153669 |
Removal of metals from waste materials that contain bimetallic salt complexes
Metals are removed from waste materials that contain an organic component and a bimetallic salt complex component that comprises complexes having the formula M I M II X n Aromatic and/or the...
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4145397 |
Process for recovering molybdenum, vanadium, cobalt and nickel from roasted products of used catalysts from hydrotreatment desulfurization of petroleum
From roasted products of used catalysts from hydrotreatment desulfurization of petroleum, valuable molybdenum, vanadium, cobalt and nickel are recovered easily and a high percent recovery by means...
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4139594 |
Process for extracting trivalent thallium values from aqueous solutions
Trivalent thallium values are extractively recovered from aqueous media containing dissolved trivalent and monovalent thallium values by contacting the aqueous medium in the presence of an alkanoic...
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4110399 |
Process for the extraction of alumina from aluminum-containing silicates
A process for the extraction of alumina from aluminum-containing silicates is disclosed. The process comprises acid leaching of the raw material, iron extraction, precipitation of the aluminum...
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4107266 |
Production of pure alumina from iron contaminated sulfate liquors
Alumina is recovered from aluminum sulfate leach liquors by treatment of the liquor with HCl gas to the point of incipient crystallization of AlCl 3 .6H 2 O, extraction of the resulting solution...
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4065919 |
Pollution minimizing device and method for internal combustion engines
The inlet opening of a chamber is connected to the exhaust manifold of an internal combustion engine so that the combustion products pass through the chamber to an exit opening. The chamber...
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4058484 |
Ammonium faujasite zeolites
A process of producing an ammonium zeolite of the faujasite type in which a zeolite of the faujasite type whose exchange sites are substantially entirely occupied by Na cations, is treated with an...
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4051230 |
Liquid-liquid extraction process of metals
In this process metal ions such as Ag + , Pb 2 +, Co 2 +, Cu 2+, Fe 3 +, etc., are extracted through a porous membrane impregnated with the first extractant containing chelating agents. The...
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4048284 |
Method and system for ion-exchanging particles
Disclosed are a method and system for ion-exchanging cations in zeolitic particles of a size useful in fluidized bed processes; for example, zeolitic microspheres of the type employed in fluidized...
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4033764 |
Recovery of metals
Metal ions may be scavenged from solution by means of a complexing agent comprising an inorganic substrate, such as a clay mineral, with covalent organic molecules, such as onium compounds,...
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4032613 |
Removal of iron from aluminum nitrate
Iron is removed from concentrated aluminum nitrate solution by solvent extraction with tri-n-butyl phosphate.
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