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Class 422/148 - Ammonia synthesizer


Subclass of Class 422 - Chemical apparatus and process disinfecting, deodorizing, preserving, or sterilizing
Definition: Apparatus specifically adapted for the chemical synthesis
No. of patents: 145
Last issue date: 01/03/2012


1        
NumberTitleIssue Date
8088336Reducing gas generator and solid reductant SCR system having the generator
A reducing gas generator generates reducing gas including ammonia. The generator includes a solid reductant and a heat-generating portion. The solid reductant is formed in a columnar shape. A cross-sectional surface of the solid reductant has a constant shape and is...
01/03/2012
7867460Efficiency of ammonia processes
Systems and methods for producing ammonia. The system can include a first shell having two or more discrete catalyst beds disposed therein, a second shell disposed about the first shell, a first heat exchanger disposed external to the first shell and in fluid commun...
01/11/2011
7435401Pseudoisothermal ammonia process
Ammonia is produced in a reactor 22, 24, 246, 248, 250 or 252, in which pseudoisothermal conditions can be approached by convective cooling of a reaction zone of the reactor by positioning at least a portion of the reaction zone in indirect contact wit...
10/14/2008
7402292Device and methods of ammonia generation for NOx abatement
One embodiment of a method of operating a NOx abatement system comprises: introducing an exhaust stream to an ammonia generator in a normal flow direction, adsorbing NOx from the exhaust stream in the ammonia generator, diverting the exhaust stream around the ammoni...
07/22/2008
7371313On-site generation, purification, and distribution of ultra-pure anhydrous ammonia
A system and method for generating, purifying, and using ultra-pure ammonia on-site, such as at a semiconductor manufacturing facility. The system includes an ammonia generation system configured to generate ammonia including carbon dioxide, water, and other impurit...
05/13/2008
7371361Maximum reaction rate converter system for exothermic reactions
An ammonia converter system and method are disclosed. The reactor can alter the conversion of ammonia by controlling the reaction temperature of the exothermic reaction along the length of the reactor to parallel the equilibrium curve for the desired product. The re...
05/13/2008
7351751Autothermal reformer reactor processes
A process for the startup of an ATR which does not contain an ignition means is provided. Also provided is a process to ascertain ATR catalyst activity prior to introduction of sufficient oxidant to form a flammable feed mixture. ...
04/01/2008
7332139Process and device for carrying out reactions in reactor with slot-shaped reaction spaces
Reactions between at least two fluid reactants are performed in a reactor comprising wall elements (1), slot-shaped reaction spaces (3) and cavities (5) for conducting a fluid heat-carrier through. Depending on the process and throughput, a modu...
02/19/2008
7328738Heat exchanger
An improved heat exchanger which resists fouling of the heat exchange surface by minimizing the temperature difference between the heat exchanger surface and the fluid stream in contact with the heat exchange surface. In one embodiment, a heat exchanger comprises an...
02/12/2008
7294313Device and method for producing ammonia from solid urea pellets
A device for producing ammonia from urea pellets includes a pellet dispensing device, a pellet accelerator, a pellet shooting channel, and an ammonia reactor having a chamber or zone for shooting in urea pellets and a pellet deflector arranged on an end of the shoot...
11/13/2007
7279138Horizontal chemical reactor, in particular for methanol synthesis
A horizontal chemical reactor comprises at least one catalytic bed (5a-5d) arranged horizontally in the reactor and comprising a lower gas-permeable wall (6) for gas outlet, and a holding element (2) of the at least one cata...
10/09/2007
7269972Plant and method for fractionating and purifying synthesis gas
An plant unit for fractionating and purifying synthesis gas is described, which is comprised of a device for partially condensing synthesis gas and a device for nitrogen washing, whereat the device for nitrogen washing is adjacent to the device for partial condensat...
09/18/2007
7214721Pre-converter for methanol synthesis
A reactor system, plant and a process for the production of methanol from synthesis gas is described in which the reactor system comprises: (a) a first reactor adapted to be maintained under methanol synthesis conditions having inlet means for supply of...
05/08/2007
7189379Apparatus for methanol synthesis
An object of the present invention is to provide a production process for methanol in which a distillation system is reduced in a size by removing efficiently heat generated in a methanol synthesis reaction and inhibiting by-products from being formed. The present i...
03/13/2007
7172743Method for the catalytic production of ammonia from synthesis gas
Ammonia is produced from a synthesis gas containing nitrogen and hydrogen on a granular catalyst in at least one reactor at pressures in the range from 50 to 300 bar and temperatures in the range from 100 to 600° C. A product mixture containing NH3 vapor...
02/06/2007
7112312Quench box for a multi-bed, mixed-phase cocurrent downflow fixed-bed reactor
A compact quench box design for a multi-bed, mixed-phase cocurrent downflow fixed-bed reactor has a quench pipe manifold and nozzle assembly, a collection tray, a mixing chamber, and a single final distributor tray. The quench pipe manifold and nozzle assembly is an...
09/26/2006
7083329Method of measuring high temperatures and instrument therefore
A method for measurement of high temperatures of a process stream by means of a thermocouple arranged in a thermowell. The thermowell is at least partly covered by a layer of a catalytic material which is active in at least one endothermic reaction. The thermowell i...
08/01/2006
7081230Split-flow, vertical ammonia converter
A vertical, fixed-bed ammonia converter wherein a fixed-bed catalyst zone is configured into two mechanically separated catalyst volumes and two gas streams that operate in parallel. The design maintains the ratio of gas flow to catalyst volume so that there is no c...
07/25/2006
7048772Secondary reforming process and burner
A process for carrying out secondary reforming reactions for the production of synthesis gas wherein a gas flow comprising oxygen and a gas flow comprising hydrocarbons are fed into a combustion chamber and are reacted upon mixing, thus obtaining a gas flow comprisi...
05/23/2006
7040119Method and device for liquefying hydrogen
Described is a process and a device for liquefying hydrogen, whereby the hydrogen to be liquefied is liquefied against one or more refrigerant (mixture) circuits and/or by means of expansion and is guided over at least one ortho-para conversion catalyst. Acco...
05/09/2006
7037472Single-pipe cylinder-type reformer
A single-pipe cylinder-type reformer includes a plurality of circular cylinders standing upright coaxially and forming therebetween a zigzag gas flow path allowing a raw material gas to flow therein, a radiation cylinder coaxially arranged inside the plurality of ci...
05/02/2006
7022294Compact reactor
A reactor comprises a plurality of reaction zones divided by heat exchanger panels but in fluid communication via the panels, the reaction zones being arranged in a spiral configuration whereby the reaction zones form a flow path for reactants that extends between a...
04/04/2006
7017514Method and apparatus for plasma optimization in water processing
An apparatus for managing plasma in wafer processing operations is disclosed which includes a housing having an internal region defined by an inner wall. The housing has an input port for supplying a plasma into the housing at a first end and an output port at a sec...
03/28/2006
7003359Multiple process plant product lines from a common set of engineered components
A method for process plant design which comprises (a) preparing a detailed design for a process plant in a product line including a detailed design of at least one engineered component and (b) preparing a detailed design for another process plant in a different prod...
02/21/2006
6986870Combined methane decomposition and ammonia formation cell
An ammonia synthesis process and apparatus are provided which are energy efficient and minimize greenhouse-gas-emission during the processing of natural gas and air. In the process a stream of natural gas is divided into two streams, one of which is mixed with air a...
01/17/2006
6958135Isothermal reactor for exothermic or endothermic heterogeneous reactions
An isothermal reactor for carrying out heterogeneous exothermic or endothermic reactions, includes within a catalytic bed (3) housed in an appropriate outer shell (2), at least one tube (13) for the passage of a cooling or heating fluid which ad...
10/25/2005
6955793Temperature controlled reaction vessel
A reaction vessel which includes internally placed temperature controlling mixing baffles in which liquid is boiled, resulting in an isothermal heat sink. The energy of vaporization is supplied by the reaction vessel contents. The vapor produced by the boiling is di...
10/18/2005
6955797Process for the preparation of ammonia
Process for the preparation of ammonia comprising steps of contacting an ammonia synthesis gas with an ammonia synthesis catalyst arranged as reaction zone in one or more catalyst tubes; cooling the reaction zone b...
10/18/2005
6939520Reactor for exothermic or endothermic heterogeneous reactions
An isothermal reactor for carrying out heterogeneous exothermic or endothermic reactions, includes within a catalytic bed (3) housed in an appropriate outer shell (2), at least one tube (13) for the passage of a cooling or heating fluid which ad...
09/06/2005
6916453Reactor for exothermic or endothermic heterogeneous reactions
A reactor (1) for carrying out exothermic or endothermic heterogeneous reactions comprising an outer shell (2) of substantially cylindrical shape and at least a heat exchanger (9) embedded in a catalytic layer (10) supported in said shell...
07/12/2005
6913638Method for separating hydrogen gas
Product gas (Gpro) is separated from material gas (Gmat) by a PSA process utilizing a plurality of adsorption towers (A-C) each loaded with an adsorbent. The separation of the product gas (Gpro) is performed by repeating a cycle comprising an adsorption step, a deco...
07/05/2005
6896757Rear projection screens and light filters with conformable coatings and methods of making the same
This invention relates to light transmitting filters comprising: (a) a light absorbing layer of material having a front surface and a back surface, (b) transparent microspheres embedded in the light absorbing layer and contacting the front surface of the light absor...
05/24/2005
6696026Process for combined production of ammonia and urea
A process for the combined production of ammonia and urea of the type comprising an ammonia synthesis reactor (2), a urea synthesis reactor (5) and a urea recovery section (21) stands out for the fact of submitting at least a part of a flow comprising car...
02/24/2004
6616901Apparatus for pollution control in exhaust gas streams from fossil fuel burning facilities
This invention relates to pollution control requirements for fossil fuel burning facilities such as power plants, and, more particularly, to an apparatus for providing a safe and economical supply of ammonia, from a urea feedstock, when ammonia is desired...
09/09/2003
6540971Process and reactor for the preparation of ammonia
Process and reactor for the preparation of ammonia at elevated pressure and temperature in an ammonia reactor, wherein a process stream of ammonia synthesis gas is successively passed through at least three catalyst beds with intermediate cooling of parti...
04/01/2003
6482382Process and converter for the preparation of ammonia
Process for the preparation of ammonia, wherein three separate streams of fresh ammonia synthesis gas are used. The ammonia converter contains at least two catalyst beds connected in series. The second and third synthesis gas streams are passed through he...
11/19/2002
6299849Method for in-situ modernization of a heterogeneous exothermic synthesis reactor
A Method for in-situ modernization of a heterogeneous exothermic synthesis reactor, comprising the steps of providing at least a first and at least a second catalytic bed (12, 13) in an upper (2a) respectively lower (2b) portion of the reactor, providing ...
10/09/2001
6274096Methanol plant retrofit
The retrofitting of an existing methanol or methanol/ammonia plant to make acetic acid is disclosed. The plant is retrofitted to feed carbon dioxide into a reformer to which natural gas and steam (water) are fed. Syngas is formed in the reformer wherein b...
08/14/2001
6227572Durable tactile indicia for banknotes/documents and method of making same
A sheet material, such as a bank note, having tactile indicia therein, the tactility of which is resistant to deterioration and useful for assisting persons with impaired vision to identify one or more predetermined characteristics of the sheet material s...
05/08/2001
6214296Method of catalytic reaction carried out near the optimal temperature and an apparatus for the method
The present invention discloses a method of catalytic reaction operated near the optimal temperature and an apparatus for its embodiment. The catalyst bed in the apparatus consists of two parts of catalyst located respectively in the cold tube layer and t...
04/10/2001
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