Casale Sa

Methanol Casale Sa

Ammonia Casale Sa

Urea Casale Sa

Other

Lurgi Gmbh

Amonia Casale S.a.

Mg Technologies Ag

Ermanno Filippi

Enrico Rizzi

Mirco Tarozzo

Raffaele Ostuni

Geoffrey Frederick Skinner

Marco Badano

Giorgio Pagani

Federico Zardi

Luca Redaelli

Umberto Zardi

Gianfranco Bedetti

Sergio Panza

Francesco Baratto

Umberto Rossi

Andrea Scotto

Luca Zanichelli

Domenico Romiti

Iacopo Cerea

Pierdomenico Biasi

Giuseppe Guarino

William Davey

Fabiano Montini

Luca Bianchi

Keith A Clayton

Damiano Marzari Chiesa

Micro Tarozzo

Franco Fabbri

Pasquale Talarico

Michal Tadeusz Bialkowski

Filippo Iocchi

Michele Corbetta

Gabriele Colombo

A process for the catalytic oxidation of ammonia, comprising: passing an ammonia-containing gas, in the presence of oxygen, over a catalyst contained in a reactor, obtaining a process gas containing nitrogen oxides, and cooling said process gas with a heat exchanger accommodated in the reactor, wherein a portion of said process gas, located in the shell side, bypasses the heat exchanger and forms a hot current which mixes with cooled gas downstream the heat exchanger, and the bypass is regulated on the basis of a target outlet temperature of the mixed process gas.

Process and reactor for catalytic oxidation of ammonia

Reactor for catalytic chemical reactions comprising a catalyst bed with an annular-cylindrical form crossed by a radial flow or mixed axial-radial flow, wherein the bed is delimited by cylindrical walls made gas-permeable by means of slits and the catalyst bed is formed by particles of catalyst with a nominal minimum size such that: the ratio between a transverse dimension of the slits and the nominal minimum size of the particles of catalyst is smaller than or equal to 0.6; the catalyst bed contains no more than 3% by weight of particles with an actual size smaller than said nominal size.

Radial or axial-radial chemical reactor with a fine catalyst

Process including the production of a hydrogen-containing synthesis gas by conversion of a hydrocarbon feedstock, wherein said process has a heat input provided by combustion of a plurality of process fuel streams and said plurality of process fuel streams comprises at least one fuel stream of ammonia. Combustion of said at least one fuel stream of ammonia is performed non-catalytically in at least one fired equipment.

Process for producing a hydrogen-containing synthesis gas

Process for manufacturing a hydrogen-containing synthesis gas from a natural gas feedstock, comprising the conversion of said natural gas into a raw product gas and purification of said product gas, the process having a heat input provided by combustion of a fuel; said process comprises a step of conversion of a carbonaceous feedstock, and at least a portion of said fuel is a gaseous fuel obtained by said step of conversion of said carbonaceous feedstock, and the Wobbe Index of said fuel is increased by a step of carbon dioxide removal or methanation.

Process for producing a synthesis gas

Radial or axial-radial flow catalytic chemical reactor comprising a cylindrical shell and at least one catalytic bed and comprising a plurality of perforated tubes, said tubes having an open end communicating with an inlet of a gaseous flow of reagents in the reactor, said tubes being provided with a plurality of holes on their side surface, said tubes being arranged around the catalytic bed so as to form an outer wall which bounds the catalytic bed and which distributes the reagents inside said bed; each of said tubes being formed by means of longitudinal or helical butt welding of a perforated strip.

Walls for catalytic beds of radial- or axial-flow reactors

Process for the synthesis of ammonia comprising the steps of reforming of a hydrocarbon feedstock into a raw product gas, purification of said raw product gas obtaining a make-up synthesis gas, conversion of said synthesis gas into ammonia; said purification includes shift conversion of carbon monoxide into carbon dioxide and the reforming process requires a heat input which is at least partially recovered from at least one of said step of shift conversion, which is carried out with a peak temperature of at least 450&#xb0; C., and said step of conversion into ammonia.

Process for the synthesis of ammonia

Process for manufacturing a hydrogen-containing synthesis gas from a natural gas feedstock, comprising the conversion of said natural gas into a raw product gas and purification of said product gas, the process having a heat input provided by combustion of a fuel; said process comprises a step of conversion of a carbonaceous feedstock, and at least a portion of said fuel is a gaseous fuel obtained by said step of conversion of said carbonaceous feedstock.

A process for producing ammonia make-up synthesis gas and a procedure for revamping a front-end of an ammonia plant for producing ammonia make-up synthesis gas are disclosed, wherein the make-up synthesis gas is produced by means of steam reforming of a hydrocarbon gaseous feedstock; said front-end includes a primary reformer, a secondary reformer, a shift conversion section, a CO2 removal section and optionally a methanation section; a shell-and-tube gas-heated reformer is installed after said secondary reformer, and a portion of the available feedstock is reformed in the tubes of said gas-heated reformer, and heat is provided to the shell side of said gas-heated reformer by at least a portion of product gas leaving the secondary reformer, possibly mixed with product gas leaving the tubes of said gas-heated reformer.

Process for producing ammonia synthesis gas and a method for revamping a front-end of an ammonia plant

A process for purification of a current of hydrogen synthesis gas (), particularly in the front-end of an ammonia plant, wherein said gas contains hydrogen and minor amounts of carbon monoxide, carbon dioxide, water and impurities, said process including steps of methanation () of said current (), converting residual amounts of carbon monoxide and carbon dioxide to methane and water, dehydration () of the gas to remove water, and then a cryogenic purification () such as liquid nitrogen wash, to remove methane and Argon; a corresponding plant and method for revamping an ammonia plant are also disclosed.

Process for purification of a synthesis gas containing hydrogen and impurities

A shell-and-tube apparatus (), suitable for use as a waste heat boiler, comprising a vessel with an exchanging section () and a separating section (), wherein: said exchanging section () contains a bundle of U-tubes () fed with an evaporable liquid medium such as water (W) and exposed to a hot gas (G) flowing in a hot chamber around said tubes, so that said medium is partially evaporated in the tubes while recovering heat from hot gas flowing in the hot chamber (); said separating section () comprises a collection chamber () in communication with outlet of the tubes () to receive the partially evaporated medium leaving the tubes; said separating section () is arranged to provide separation of vapour fraction and liquid fraction from the partially evaporated medium at least partially by gravity; the apparatus also comprises means for controlling the liquid level in the collection chamber and for a partial recycle of the non-evaporated liquid.

Shell-and-tube apparatus for heat recovery from a hot process stream

Process and plant for the synthesis of ammonia from a hydrocarbon feedstock, comprising: primary reforming with steam and air-fired secondary reforming wherein primary reforming is performed at a temperature and pressure of at least 790&#xb0; C. and 50 bar, and secondary reforming is carried out substantially in absence of excess air, the so obtained make-up synthesis gas having a Hto Nmolar ratio in the range 2.5 to 3.

Process for the ammonia production

A process and plant for producing a makeup synthesis gas () for the synthesis of ammonia, comprising: reforming of a hydrocarbon feedstock () in a steam reformer (SMR), purification of said gas product obtaining a hydrogen synthesis gas, addition of a suitable amount of nitrogen () to said hydrogen synthesis gas, wherein said purification includes separation of hydrogen in a main separation unit (S), which produces a hydrogen current () and a tail gas (), and wherein further hydrogen is recovered from the said tail gas () in an additional separation unit (S); some embodiments provides that an amount of gas product () is also fed to said additional separation unit; a corresponding method for the revamping of a front-end of an ammonia plant is also disclosed.

Process and plant for the production of ammonia make-up gas including production of a hydrogen gas by steam reforming

Process for the synthesis of ammonia from a make-up gas containing hydrogen and nitrogen, said process comprising: generation of a synthesis gas () containing hydrogen and nitrogen in a molar ratio lower than 3, inside a front-end section (); a first cryogenic purification, designed to remove nitrogen and raise said molar ratio; conversion of the synthesis gas into ammonia () inside a high-pressure synthesis loop (), with extraction from said loop of a purge stream () containing hydrogen and inert gases; wherein at least a portion of said purge stream () undergoes a further purification in order to recover at least part of the hydrogen contained therein, obtaining at least one stream () containing recovered hydrogen which is recycled to the process.

Plant and process for ammonia production with cryogenic purification, and related method of revamping

Growing community of inventors

Castagnola, Switzerland

Ermanno Filippi