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7604794 |
Zeolite catalyst for skeletal isomerisation of olefins
The present invention relates to an active and selective zeolite catalyst having MTT structure that is useful in skeletal isomerisation of light olefins. The method for the manufacture of the...
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7560092 |
Method for preparing an aluminosilicate polymer and the polymer resulting from this method
The present invention relates to a method for preparing an aluminosilicate polymer and the polymer resulting from this method. Said method consists in treating an aluminum halide with an alkyl...
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7361328 |
Method of preparing ZSM-5 using variable temperature without organic template
Disclosed is a method of preparing ZSM-5 having substantially 100% crystallinity by using variable temperatures in the absence of an organic template, characterized in that a reaction mixture...
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6991678 |
Process for preparing microporous crystalline titanium silicate
A process for the preparation of crystalline microporous titanium silicates using ethylsilicate-40 and titanium peroxide as silicon and titanium sources respectively is described. The process...
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6969692 |
Process for the preparation of doped pentasil-type zeolites using a doped reactant
A process for the preparation of a metal-doped pentasil-type zeolite comprising the steps of:
a) preparing an aqueous precursor mixture comprising a silicon source and an aluminum source, at least...
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6827924 |
Process for the preparation of nanocrystalline zeolite beta
The present invention relates to the preparation of nanocrystalline zeolite beta by a modified aerogel protocol comprising four steps, namely, hydrolysis, nucleation, crystallization and...
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6306363 |
Fine low silica faujasite type zeolite and process for its production
A fine low silica faujasite type zeolite of high purity, having a faujasite single phase as measured by X-ray diffractometry, wherein the SiO 2 /Al 2 O 3 molar ratio is from 1.9 to 2.1, the...
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6160191 |
Hydrocarbon conversion using large crystal zeolite catalyst
A process for converting hydrocarbons by contacting a hydrocarbon feedstream under hydrocarbon conversion conditions with a large crystal zeolite catalyst. The large crystal zeolite of the catalyst...
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6146613 |
Method of zeolite synthesis with homogeneous shaking out of the medium, device and application
A method is provided for zeolite synthesis from a synthesis medium containing in particular a trivalent aluminum source, a tetravalent silicon source, at least an alkaline or alkaline-earth cation...
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6136289 |
Preparation process for ferrierrite zeolite and its uses as an isomerization catalyst of linear olefin in isoolefin or as a hydrocracking and hydroisomerization paraffin catalyst
A process of preparing a ferrierite-type zeolite, with high crystallinity rate and having a anhydrous stage composition expressed by the formula M x (AlO 2 ) x (SiO 2 ) y , M being a cation of an...
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6036939 |
Heat-resistant low-silica zeolite, and process for production and application thereof
A novel heat-resistant low-silica zeolite, an industrial production process, and uses of the low-silica zeolite are provided. The heat-resistant low-silica zeolite contains Si and Al in a molar...
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5993773 |
Low-silica faujasite type zeolite and method for producing the same
Disclosed are high purity low-silica faujasite type zeolite showing a faujasite single phase on X-ray diffraction, having a SiO 2 /Al 2 O 3 molar ratio of 1.9 to 2.1 and a water adsorption of...
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5958366 |
Synthesis of large crystal zeolites
Large crystal zeolites are prepared by heating a zeolite synthesis mixture under agitation to a temperature equal to or less than the effective nucleation temperature of the zeolite synthesis...
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5928623 |
Use of a reactor stirred by a system of the archimedean screw type for the synthesis of LSX faujasite
The performances of the industrial manufacture of LSX faujasite are improved by proceeding to the aging and the crystallization of the gel by stirring with a Archimedean screw stirrer. In...
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5714133 |
Crystalline aluminosilicate zeolite syntheses
The invention relates to an improvement in the method for synthesis of crystalline aluminosilicate zeolites, such as ZSM-10, whose synthesis requires or is improved by one or more periods of gel...
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5662826 |
Process for the preparation of a coagulating chemical comprising dissolving a solid zeolite in a solution of trivalent metal salt
The present invention relates to a process for the preparation of a coagulant for water purification, in particular purification of sewage water, for pulp and paper manufacture, for dewatering...
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5645811 |
Process for the production of very fine-particle zeolitic alkali metal aluminum silicates
Finely ground zeolithic alkali metal aluminum silicates having the general formula: xMe 2 O.Al 2 O 3 .ySiO 2 .zH 2 O, are prepared by mixing both reaction components, alkali metal silicate and...
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5512266 |
Aluminosilicates and detergent composition
Aluminosilicates in the form of P type zeolites are used as detergency builders and have a silicon to aluminium ratio not greater than 1.33, preferably above 0.9. These zeolites will usually have a...
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5468281 |
Process for the separation of cobalt from nickel
A process is disclosed for separating cobalt in the form of cobalt (III) hexammine sulphate from an aqueous solution containing cobalt (III) hexammine sulphate and nickel (II) hexammine sulphate...
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5348725 |
Method of making pillared hydrotalcites and associated products
A method of making a pillared hydrotalcite and an associated products. The pillared hydrotalcite is made by calcining a hydrotalcite having the formula A w B x (OH) y [C] z nH 2 O, wherein...
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5296208 |
Molecular sieve synthesis
In the hydrothermal synthesis of crystalline microporous molecular sieves from a reaction system containing an organic templating agent, it is found that removal of at least some of the organic...
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5187132 |
Preparation of borosilicate zeolites
A method for synthesizing crystalline zeolites requiring a reaction mixture for crystallization thereof which contains Boron Beta Zeolite as an active source of silicon oxide and boron oxide.
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5053213 |
Process for synthesizing a molecular sieve having the faujasite structure and containing aluminum and gallium
A crystalline, gallioaluminosilicate molecular sieve having the faujasite structure is synthesized by mixing a substantially gallia-free aluminosilicate hydrogel with a galliosilicate solution...
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4966761 |
Process for treatment of flyash
A process is described for recovering vanadium and zeolitic alumino-silicates from flyash and similar carbon-bearing heat treated materials. The process includes steps for the separation of carbon,...
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4925613 |
Process for preparation of synthetic faujasite molded body
A synthetic faujasite molded body having high purity and high crystallinity is prepared with a good reproducibility by a process wherein a structure-inducing substance is incorporated in a starting...
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4591491 |
Process for the continuous conversion of meta-kaolin into very finely-divided zeolitic sodium alumino-silicate
In a process for the conversion of meta-kaolin into an aqueous alkaline suspension of low-grit, water-containing zeolitic sodium aluminosilicate of the smallest particle size having the molar...
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4540559 |
Preparation of type Y zeolites
Type Y zeolites were adopted as, e.g., catalysts and adsorbents, are facilely prepared by (i) intimately admixing, at essentially ambient temperature, an aqueous solution of a water-soluble...
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4385042 |
Continuous reaction/separation method for nucleated growth reactions
A solid product resulting from the nucleated growth of the product on solid material of either the same or different composition and having a density higher than the reaction medium is formed from...
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4303629 |
Crystalline zeolite powder of type A (I)
There are produced crystalline zeolite powders of Type A with the composition 1.0±0.2 M 2 /n O:Al 2 O 3 :1.85±0.5 SiO 2 y H 2 O where M is a metal cation, n is its valence and y has a...
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4248847 |
Process for preparing a substantially crystalline sodium aluminosilicate
A process for preparing a synthetic substantially crystalline sodium aluminosilicate of the zeolite A type is disclosed. The process comprises rapidly and simultaneously introducing a sodium...
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4216188 |
Cross-linked montmorillonite molecular sieves
Novel molecular sieves, being montmorillonites cross-linked with aluminum hydroxide or with chromium hydroxide and a process for the production of same comprising interaction between...
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4213949 |
Process of preparing particulate poly(alumino-silicate)
In a process for preparing particulate, porous, water-insoluble amorphous poly(alumino-silicate) having a Si/Al gram-atomic ratio of about 1:1 to 10:1, a pore volume of greater than 0.5 ml/g, an...
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4150100 |
Preparing zeolite NaA
Zeolite NaA can be produced with a very short crystallization time, if an alumino-silicate gel of particular properties is prepared and heated at about 95° C. The gel which is prepared by...
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4113843 |
Process for the production of zeolites in the form of binderless spherical granules
A process for the production of zeolites in the form of binderless spherical granules from aqueous solutions of silicate and aluminate of alkali metals having a concentration of 100-200 g/l based...
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4041135 |
Production of high capacity inorganic crystalline base exchange materials
A method is disclosed for producing inorganic crystalline base exchange materials having high total exchange capacities and specific initial exchange rates which yield well-defined residual...
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4016246 |
Manufacture of synthetic zeolites
The invention provides a method of preparing zeolite Y of high degree of purity and having a silica to alumina molar ratio of from greater than 3 up to about 6.2 which comprises preparing an...
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3920798 |
Zeolite Y synthesis
Zeolite Y is produced in good yields of high purity by a hydrothermal process characterized by the use of high temperature aging and crystallization stages, the latter rapidly achieved by...
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3663165 |
ZEOLITIC CATALYST AND PREPARATION
Preformed coherent microspheres obtained by calcining a spray dried slurry of hydrated kaolin clay at elevated temperature (e.g., 1800° F.) are suspended in an aqueous sodium hydroxide solution...
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3649178 |
SYNTHESIS OF SODIUM ZEOLITE W-Z
Sodium Zeolite W-Z and a process for making sodium Zeolite W-Z having the chemical formula: 1.0±0.1 Na 2 O . Al 2 O 3 . 5.75±0.55 SiO 2 . YH 2 O wherein Y is a number from 0 to 7 which...
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3619134 |
METHOD OF PRODUCING SMALL PARTICLE SIZE Z-14 ZEOLITE
Method of producing crystalline Z-14 zeolite having a particle size in the range of 20 to 200 millimicrons, wherein a reaction mixture having controlled molar ratios of Na 2 O, SiO 2 , Al 2 O 3 ...
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3506594 |
MICROSPHERICAL ZEOLITIC MOLECULAR SIEVE COMPOSITE CATALYST AND PREPARATION THEREOF
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3459501 |
METHOD FOR PREPARING HIGH-SILICA FAUJASITE
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3433588 |
METHOD FOR THE PREPARATION OF 4 ANGSTROM UNIT ZEOLITES
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3425800 |
PRODUCTION OF CRYSTALLINE ZEOLITES
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3310373 |
Method for producing crystalline aluminosilicates
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3264059 |
Process for the preparation of synthetic faujasite
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3130007 |
Crystalline zeolite y
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