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Molecular Sieve Patent

 

Molecular sieve type gas separation systems

In supplying a high volume flow of oxygen-enriched air from a molecular sieve type gas separation system, two sets of molecular sieve beds are coupled in parallel. The beds and of each bed set are cyclically subjected to a charge/adsorption on-stream phase followed by a purge/desorption regeneration phase and are controlled to operate in overlapping sequence with respect to each other. At the same time the corresponding beds are controlled to operate in antiphase relationship to each other.

Gas flow controllers for aircraft molecular sieve type gas separation systems

A gas flow controller 10 for use with a molecular sieve type oxygen enrichment of air system 5 delivering oxygen enriched air for breathing by aircrew ensures that a constant preset quantity of product gas in the form of oxygen enriched air flows from the system 5 so that it performs under varying demand conditions and varying air supply conditions to maintain desired levels of oxygen concentration in the oxygen enriched air delivered to the aircrew by means of a demand regulator 6 and a breathing mask 7. A servo-operated valve means 20 bleeds air from downstream of a venturi section 15 provided between in the inlet 13 and outlet 14 of a gas flow duct 12 in the body 11 of the controller 10. The servo-operated valve means 20 is regulated by an actuator means 29 responsive to pressure difference through the venturi section 15. An adjustment means 42 responsive to duct pressure upstream of the venturi section and either to varying cabin absolute pressure or to varying cabin differential pressure, applies a biasing force to the actuator means.

Attrition resistant molecular sieve

An attrition resistant molecular sieve composition comprising a generally spherical, high porosity molecular sieve particle having an exposed surface coated with a thin, generally uniform layer of solid lubricant which can be employed in fixed, moving or fluidized beds with low attrition and without significantly reduced activity.

Molecular sieve oxygen monitor

A monitoring system for determining the concentration of oxygen in the product gas of an oxygen enriching system comprises a plurality of pneumatic nor gates. Means are provided for coupling the outlet port of each gate to the control port of the subsequent gate to form a closed loop and a plurality of molecular sieve beds are pneumatically connected one each to the control port of the nor gates. The molecular sieve beds adsorb oxygen from the product gas to attenuate the rate of pressure change in the control ports and thus, the oscillation frequency of the monitor. The oxygen concentration of the product gas may be inferred from the oscillation frequency of the monitor.


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
251 4543109 Molecular sieve type gas separation systems
252 4542251 Oligomerization of liquid olefin over a nickel-containing silicaceous crystalline molecular sieve
253 4538012 Oligomerization of liquid olefin over a nickel-containing silicaceous crystalline molecular sieve
254 4537607 Gas flow controllers for aircraft molecular sieve type gas separation systems
255 4533365 Process for the separation and recycling of NO.sub.x gas constituents through adsorption and desorption on a molecular sieve
256 4526877 Attrition resistant molecular sieve
257 4521343 Process for separating fatty acids from rosin acids with phosphorus modified alumina molecular sieve
258 4514516 Method for manufacture of AMS-1B crystalline borosilicate molecular sieve with low sodium content
259 4455861 Molecular sieve oxygen monitor
260 4447641 Process for preparation of alpha, beta-unsaturated esters using AMS-1B borosilicate crystalline molecular sieve
261 4442698 Molecular sieve oxygen monitor
262 4433174 Process for preparation of alpha, beta-unsaturated aldehydes using AMS-1B borosilicate crystalline molecular sieve
263 4427410 Fabric softening composition containing molecular sieve zeolite
264 4421651 Method of recovering adsorbed liquid compounds from molecular sieve columns
265 4413154 Diels-Alder cyclodimerization over a carbon molecular sieve catalyst
266 4409104 Method of regenerating molecular sieve material
267 4404005 Molecular sieve type gas separation systems
268 4374958 Crosslinkable compositions based on alkylene-alkyl acrylate copolymers containing a polyol, an organo titanate and a molecular sieve
269 4329160 Suppression of COS formation in molecular sieve purification of hydrocarbon gas streams
270 4301114 Molecular sieve trap for nitrogen compound detection
271 4288592 Process for preparing amides by reaction in presence of molecular sieve
272 4256773 Brominated carbonaceous molecular sieve and method of use therefor
273 4251427 Coating compositions from polyurethanes containing a molecular sieve of the sodium aluminum silicate type
274 4250270 Solution polymerization with molecular sieve purification of recycled solvent
275 4248607 CTR Fuel recovery system using regeneration of a molecular sieve drying bed
276 4214011 Fiber-reinforced, activated, zeolite molecular sieve tablets and carbonation of aqueous beverages therewith
277 4182801 Method of drying liquid olefin monomer feed in a molecular sieve dryer in the polymerization of olefins from liquid olefin monomer
278 4151690 Double glazed windows containing a molecular sieve zeolite adsorbent having a preadsorbed low molecular weight polar material
279 4046709 Method of manufacturing carbonaceous granular molecular sieve
280 4045261 Molecular sieve containing stabilization system for urethane - crosslinked double base propellant
281 4038050 Electrical sensing and regenerating system for molecular sieve driers
282 3989619 Hydrotreating process employing thermactivated catalysts comprising catalytic metals-free crystalline zeolitic molecular sieve particles dispersed in a gel matrix
283 3988260 Oxidative revivification of molecular sieve catalysts admixed with refractory particles
284 3962129 Impregnation of coke with an organic compound to produce a molecular sieve
285 3953364 Thermactivation of catalysts comprising catalytic metals-free crystalline zeolitic molecular sieve particles dispersed in a gel matrix
286 3949029 Production of porous shaped inorganic structures using gas-laden molecular sieve zeolites

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