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Molecular Sieve Patent

 

Process for synthesis of high-silica silicate molecular sieve

A process for synthesizing a high-silica aluminosilicate molecular sieve, includes: subjecting, to hydrothermal synthesis, a raw material containing Al, H, O and Si and, as other elements, at least Fe and having a Si/Al molar ratio of 50 or more and a Si/Fe molar ratio of 80 or less (45 or less when a high-silica aluminosilicate molecular sieve having a .beta. type zeolite structure is produced) and then subjecting the resulting material to heat treatment in an oxidizing atmosphere at 300.degree. C. or more. The above process can synthesize a high-silica zeolite low in Al content directly without dealumination operation, and can provide process simplification and a higher yield.

Binder-free molecular sieve zeolite granules which contain zeolites of the type lithium zeolite A and lithium zeolite X

The present invention relates to binder-free molecular sieve zeolite granules of lithium zeolite A and lithium zeolite X, a process for preparing these molecular sieve zeolite granules and their use for preparing nitrogen or oxygen from air by pressure swing adsorption.

Modification of zeolite or molecular sieve membranes using atomic layer controlled chemical vapor deposition

A process for modifying surfaces of zeolites and molecular sieve membranes to decrease effective pore size for separation of materials includes atomic layer controlled vapor or liquid deposition. The atomic layer controlled deposition process steps include (i) exposing the surface to a metal atom coordinated with ligand groups having bonds that are hydrolyzable to form molecular bonded structures on the surface, which structures comprise the metal atoms coordinated with the ligand group or a modified ligand group and then (ii) hydrolyzing the bonds and possibly, but not necessarily, cross-linking the bonds in the ligand or modified ligand group.

Use of alkaline earth metal containing small pore non-zeolitic molecular sieve catalysts in oxygenate conversion

A method for converting starting material to olefins comprising contacting the starting material with a small pore non-zeolitic molecular sieve catalyst under effective conditions to produce olefins, wherein the non-zeolitic molecular sieve has been prepared in-situ or modified after synthesis by incorporation using an alkaline earth metal compound, wherein the alkaline earth metal ion is selected from the group conisting of strontium, calcium, barium, and mixtures thereof.


Chabazite-containing molecular sieve, its synthesis and its use in the conversion of oxygenates to olefins
Synthesis of molecular sieve catalysts
Process for synthesis of high-silica silicate molecular sieve
Inorganic composite membrane comprising molecular sieve crystals
Lithium-aluminum-phosphorus-silicon-oxide molecular sieve compositions
Molecular sieve type gas separation systems
Molecular sieve layers and processes for their manufacture
Process for production of molecular sieve adsorbent blends
Molecular sieve compositions, catalyst thereof, their making and use in conversion processes

PAT. NO. Title
101 6051205 Process for synthesis of high-silica silicate molecular sieve
102 6051051 Binder-free molecular sieve zeolite granules which contain zeolites of the type lithium zeolite A and lithium zeolite X
103 6043177 Modification of zeolite or molecular sieve membranes using atomic layer controlled chemical vapor deposition
104 6040264 Use of alkaline earth metal containing small pore non-zeolitic molecular sieve catalysts in oxygenate conversion
105 6030916 Process for the preparation of a molecular sieve adsorbent for selectively adsorbing nitrogen from a gaseous mixture
106 6005155 Modification of molecular sieve catalyst for reduced methane production during conversion of oxygenates to olefins
107 6004898 Alkaline earth metal containing small pore non-zeolitic molecular sieve catalysts
108 6004527 Method for making molecular sieves and novel molecular sieve compositions
109 5990371 Process for the selective hydroisomerization of long linear and/or slightly branched paraffins using a catalyst based on a molecular sieve
110 5972079 Supported carbogenic molecular sieve membrane and method of producing the same
111 5968471 Process for producing molecular sieve carbon
112 5968242 Colourant-loaded molecular sieve
113 5962762 Use of transition metal containing small pore molecular sieve catalysts in oxygenate conversion
114 5962358 Binder-free molecular sieve zeolite granules which contain zeolites of the type lithium zeolite A and lithium zeolite X
115 5958368 Noncrystalline mesoporous molecular sieve substance and method for preparing the same
116 5944933 Method for distributing molecular sieve powder
117 5942208 Mesoporous molecular sieve substance and method for preparing the same
118 5939349 Method of preparing non-zeolitic molecular sieve catalyst
119 5932512 Fluorination of synthesized molecular sieve catalysts for increased selectivity to ethylene during conversion of oxygenates to olefins
120 5925800 Conversion of oxygenates to hydrocarbons with monolith supported non-zeolitic molecular sieve catalysts
121 5925586 Phosphorus modified small pore molecular sieve catalysts, and their use in the production of light olefins
122 5912393 Metallo aluminophosphate molecular sieve with novel crystal morphology and methanol to olefin process using the sieve
123 5897846 Catalytic converter having a catalyst with noble metal on molecular sieve crystal surface and method of treating diesel engine exhaust gas with same
124 5846406 Selective hydrodesulfurization of cracked naphtha using novel manganese oxide octahedral molecular sieve supported catalysts
125 5827355 Carbon fiber composite molecular sieve electrically regenerable air filter media
126 5827354 Container for carbon molecular-sieve material
127 5817907 Process for skeletal isomerization of linear olefins using a pretreated molecular sieve, and a catalyst containing a pretreated sieve
128 5753576 Regeneration of a titanium-containing molecular sieve
129 5753121 Inorganic composite membrane comprising molecular sieve crystals
130 5741749 Regeneration of a titanium-containing molecular sieve
131 5723397 Molecular sieve layers and processes for their manufacture
132 5712461 Molecular sieve--photoactive semiconductor membranes and reactions employing the membranes
133 5695736 Tiatanium containing molecular sieve having a zelite beta structure
134 5695618 Oxidative coupling of methane on octahedral molecular sieve
135 5683662 Article and method for archival preservation with an organophilic, hydrophobic or acid-resistant molecular sieve
136 5614079 Catalytic dewaxing over silica bound molecular sieve
137 5593655 Process for preparing a large molecular sieve
138 5578282 Octahedral molecular sieve possessing (4.times.4) tunnel structure and method of its production
139 5578115 Molecular sieve container for oxygen concentrator
140 5545393 Method of preparing manganese oxide octahedral molecular sieve
141 5541146 Extrusion-modified molecular sieve
142 5527520 Method of making a titanium-containing molecular sieve
143 5525296 Article and method for archival preservation with an organophilic, hydrophobic or acid-resistant molecular sieve
144 5518708 Substitution of Sn in place of Al in the framework of molecular sieve via treatment with fluoride salts
145 5516957 Discrete molecular sieve and use
146 5478787 Discrete molecular sieve and use
147 5475182 Acid extraction of molecular sieve catalysts to improve ethylene yield
148 5468699 Molecular sieve - photoactive semiconductor membranes and reactions employing the membranes
149 5434326 Discrete molecular sieve and use in aromatic-olefin alkylation
150 5429814 Molecular sieve-enclosed transition and rare earth metal ions as contrast agents for the gastrointestinal tract

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