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Molecular Sieve Patent

 

Synthesis of molecular sieve catalysts

Disclosed is a molecular sieve catalyst which contains molecular sieve-containing attrition particles and virgin molecular sieve, the attrition particles having been recycled from a catalyst manufacture process or from a reaction system. The catalyst can be used in a variety of catalytic reaction processes. A desired process is making olefins from an oxygenate feedstock. The recovery and use of the attrition particles in the catalyst is beneficial in minimizing waste, thereby reducing problems relating to both environmental and economic constraints.

Substituted calix (4) pyrroles and process for the synthesis of calix (4) pyrroles over molecular sieve catalysts

The present invention relates to novel calix pyrroles and a process for synthesis of calix (4) pyrroles by reacting pyrrole with cyclic or acyclic ketones in dichloro methane (DCM) solvent over molecular sieve catalysts which provides an eco-friendly, more economical and selective heterogeneous method.

SAPO-11 molecular sieve, its synthetic method and a catalyst containing the molecular sieve

A SAPO-11 silicoaluminopihosphate molecular sieve, its preparation method, and a catalyst containing the same are disclosed. The X-ray diffraction data of the molecular sieve before removing the template by calcination are as listed in Table 1. The molar composition of this molecular sieve after removing the template by calcination expressed in anhydrous oxides is Al.sub.2 O.sub.3 : yP.sub.2 O.sub.5 : zSiO.sub.2 in which y has a value of 0.60-1.20 and z has a value of 0.05-1.3 characterized in that after removing the template by calcination, its X-ray diffraction data are as listed in Table 3 and that the crystal structures of the molecular sieve before and after removing the template by calcination are substantially the same. The catalyst is composed of 10-85% by weight of said SAPO-11 molecular sieve, 0.05-1.5% by weight of Pd or Pt, and the balance is alumina. In comparison with similar catalysts in the prior art, when the catalyst of this invention is applied in the reaction of hydrocarbon hydroisomerization, both selectivity and product yield for isomerization are remarkably increased.

Process for the preparation of molecular sieve adsorbent for selective adsorption of nitrogen and argon

The present invention relates to the manufacture of novel molecular sieve adsorbents for the separation of a gaseous mixture of oxygen, nitrogen and argon. The adsorbent is useful for the separation of oxygen and/or nitrogen from air. More specifically, the invention relates to the manufacture of a molecular sieve adsorbent, which is selective towards nitrogen from its gaseous mixture with oxygen and/or argon and argon from its gaseous mixture with oxygen.


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
51 6605749 Synthesis of molecular sieve catalysts
52 6605194 Substituted calix (4) pyrroles and process for the synthesis of calix (4) pyrroles over molecular sieve catalysts
53 6596156 SAPO-11 molecular sieve, its synthetic method and a catalyst containing the molecular sieve
54 6585948 Carbon molecular sieve material with structural regularity, method for preparing the same and use thereof
55 6572838 Process for the preparation of molecular sieve adsorbent for selective adsorption of nitrogen and argon
56 6541415 Synthesis of molecular sieve catalysts
57 6537941 Rejuvenating SAPO molecular sieve by freeze drying
58 6530975 Molecular sieve adsorbent for gas purification and preparation thereof
59 6524446 Process for synthesis of a porphyrin compound using a molecular sieve catalyst under microwave irradiation
60 6521562 Preparation of molecular sieve catalysts micro-filtration
61 6521206 Molecular sieve CIT-6
62 6521198 Metal surfaces coated with molecular sieve for corrosion resistance
63 6508860 Gas separation membrane with organosilicon-treated molecular sieve
64 6503863 Heat treating a molecular sieve and catalyst
65 6500972 Synthesis of TMBQ with transition metal-containing molecular sieve as catalysts
66 6498120 Rejuvenating SAPO molecular sieve with anhydrous liquid or vapor
67 6482380 Silicotitanate molecular sieve and condensed phases
68 6475465 Titanium-silicalite molecular sieve and the method for its preparation
69 6472016 Membrane comprising a porous carrier and a layer of a molecular sieve and its preparation
70 6455748 Protecting catalytic activity of a SAPO molecular sieve
71 6448197 Method for making a metal containing small pore molecular sieve catalyst
72 6440894 Methods of removing halogen from non-zeolitic molecular sieve catalysts
73 6403853 Olefin oligomerization using surface modified molecular sieve catalyst
74 6395674 Heat treating a molecular sieve and catalyst
75 6383965 Method of regenerating a molecular sieve catalyst
76 6383256 Molecular sieve type gas separation apparatus
77 6350429 Method for making molecular sieves and novel molecular sieve compositions
78 6316683 Protecting catalytic activity of a SAPO molecular sieve
79 6306362 Aluminosilicate molecular sieve
80 6290759 Linear actuator driven molecular sieve oxygen generator
81 6284696 Mesopore molecular sieve and process for the production thereof
82 6214758 Method of making small pore hydrophilic molecular sieve bodies
83 6207872 Metallo aluminophosphate molecular sieve with cubic crystal morphology and methanol to olefin process using the sieve
84 6207604 .beta.-zeolite molecular sieve absorbent
85 6198015 Catalyst based on a molecular sieve and a process for selective hydroisomerisation of long linear and/or slightly branched paraffins using that catalyst
86 6183539 Molecular sieve adsorbent for gas purification and preparation thereof
87 6177373 Procedure for preparing molecular sieve films
88 6166258 Process for preparing methylamines using acidic molecular sieve catalysts
89 6127300 Process for making a catalyst with noble metal on molecular sieve crystal surface
90 6117810 Manufacturing method of complex molecular sieve compound
91 6117411 Molecular sieve CIT-6
92 6090738 Process for the preparation of a molecular sieve adsorbent for selectively adsorbing methane from a gaseous mixture
93 6087514 Titanium silicate molecular sieve oxidation catalysts and the production thereof
94 6087289 Process for the preparation of a molecular sieve adsorbent for selectively adsorbing oxygen from a gaseous mixture
95 6080698 Pentasil-type molecular sieve containing composition and its preparation method
96 6077331 Molecular sieve type gas separation apparatus and method
97 6074974 Manufacturing method of granulated complex molecular sieve composition having multi-functions
98 6063169 Control means for molecular sieve on-board oxygen generator
99 6060415 Aligned molecular sieve crystals grown on anodic alumina membrane
100 6051746 Oxygenate conversions using modified small pore molecular sieve catalysts

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