公开(公告)号：US10781167B2

公开(公告)日：2020-09-22

申请号：US15780086

申请日：2016-12-09

申请人： Casale SA

发明人： Luca Rugnone

IPC分类号： C07C273/04 ,  B01D3/04 ,  C07C273/16 ,  B01D1/06 ,  B01D3/00

摘要： A shell-and-tube stripper for carbamate decomposition and ammonia recovery from a urea solution comprising a bundle of heated tubes, said tubes being fed with said urea solution and carbon dioxide as stripping medium, the urea solutions forming a liquid falling film on the internal surface of the tubes and the carbon dioxide forming a counter-current gaseous flow; said tubes comprise an external layer made of super austenitic or super duplex stainless steel and an internal layer made of zirconium, said internal layer reaching temperatures higher than 220° C.

公开(公告)号：US20200223776A1

公开(公告)日：2020-07-16

申请号：US16328470

申请日：2017-06-30

申请人： Casale SA

发明人： Pietro Moreo ,  Maddalena Lepri

IPC分类号： C07C29/151 ,  B01J8/02 ,  B01J8/04

摘要： A process for the synthesis of methanol from an input stream of synthesis gas, comprising the following steps: subjecting a portion of said input stream as feed stream to an adiabatic reactive step, providing an effluent containing methanol and unreacted synthesis gas; quenching of said effluent with a further portion of said input stream, providing a quenched stream; subjecting said quenched stream to an isothermal reactive step, providing a methanol-containing product stream.

公开(公告)号：US10703686B2

公开(公告)日：2020-07-07

申请号：US15575878

申请日：2016-04-13

申请人： Casale SA

发明人： Luca Rugnone

IPC分类号： C05G3/00 ,  C05G5/12 ,  C05C3/00 ,  C05G3/20 ,  C05G5/20 ,  C05G5/30 ,  B01J2/16 ,  C05C9/00

摘要： A process for making a combined fertilizer comprising a first nitrogen-based fertilizer, such as urea or ammonium nitrate, and one or more further components chosen among: nitrogen-based fertilizers, being different from the first nitrogen-based fertilizer and nutrients, wherein the combined fertilizer is made by a process of granulation in a fluid bed, the fluid bed being preferably in a vortex condition.

公开(公告)号：US10655921B2

公开(公告)日：2020-05-19

申请号：US16022303

申请日：2018-06-28

申请人： Casale SA

发明人： Enrico Rizzi

IPC分类号： B01J8/06 ,  F28D7/06 ,  F28D7/16 ,  F28F9/013 ,  F01K5/02 ,  B01J31/02 ,  B01J8/04 ,  F28D21/00 ,  F28F9/22

摘要： Tube-bundle heat exchange unit (1) for internals of heat exchangers or reactors, comprising: at least one tube bundle (2); a plurality of baffles (3) associated with said tube bundle and defining through-openings according to a predefined arrangement, each opening being passed through by one of more tubes of the tube bundle, and a shell (6) which surrounds said tube bundle and said baffles, wherein the assembly of the tube bundle and the shell can be disassembled and the shell is structurally collaborating with the tube bundle through said baffles.

公开(公告)号：US10596538B2

公开(公告)日：2020-03-24

申请号：US16335825

申请日：2017-09-21

申请人： Casale SA

发明人： Enrico Rizzi

IPC分类号： B01J8/04 ,  B01D53/86

摘要： Axial-radial flow reactor comprising a catalytic bed (1) of a hollow cylindrical shape, having a vertical axis (2), a base (5), a radial gas inlet section (3b), an axial gas inlet section (6) and a radial gas outlet section (4b), wherein the catalytic bed (1) comprises: a first cylindrical annular region (10) containing a layer of a first catalyst (A) and a layer of a second catalyst (B), the layer of the first catalyst being above the layer of the second catalyst; a second cylindrical annular region (9) coaxial to the first annular region and containing only the first catalyst (A).

公开(公告)号：US20200071167A1

公开(公告)日：2020-03-05

申请号：US16491965

申请日：2018-02-01

申请人： Casale SA

发明人： Iacopo Cerea ,  Jean François Granger

IPC分类号： C01B21/46 ,  C01B21/28 ,  B01D53/56 ,  B01D53/78 ,  B01D53/14

摘要： A dual-pressure plant for the synthesis of nitric acid comprising: a reactor (4) providing a gaseous effluent (15) containing nitrogen oxides; an absorption tower (6) nitrogen oxides react with water providing raw nitric acid and, said absorption tower operating at a pressure greater than the pressure of the reactor; a compressor (5) elevating the pressure of the reactor effluent (15) to the absorption pressure; said plant also comprising a first bleacher (37) and a second bleacher (7), said first bleacher (37) stripping with air (39) nitrogen oxides from the output stream (27) of the absorption tower (6) providing a partially stripped nitric acid stream (40) and a nitrogen oxides-loaded air stream (41), the former being fed to the second bleacher (7) and the latter being recycled to the delivery-side of said compressor (5).

公开(公告)号：US10562768B2

公开(公告)日：2020-02-18

申请号：US14915061

申请日：2014-09-02

申请人： Casale SA

发明人： Ermanno Filippi ,  Raffaele Ostuni

IPC分类号： C01B3/34 ,  C01B3/02 ,  C01C1/04 ,  B01J7/00 ,  B01J12/00 ,  C01B3/56 ,  C01B3/48 ,  C01B3/52 ,  C01B3/38

摘要： A process and plant for producing a makeup synthesis gas (20) for the synthesis of ammonia, comprising: reforming of a hydrocarbon feedstock (10) in a steam reformer (SMR), purification of said gas product obtaining a hydrogen synthesis gas, addition of a suitable amount of nitrogen (19) to said hydrogen synthesis gas, wherein said purification includes separation of hydrogen in a main separation unit (S1), which produces a hydrogen current (14) and a tail gas (15), and wherein further hydrogen is recovered from the said tail gas (15) in an additional separation unit (S2); some embodiments provides that an amount of gas product (24) 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.

公开(公告)号：US20200023343A1

公开(公告)日：2020-01-23

申请号：US16587511

申请日：2019-09-30

申请人： Casale SA

发明人： Federico Zardi

IPC分类号： B01J31/02 ,  C07C273/16

摘要： A process and a plant for the preparation of an acqueous solution of urea suitable for use in a SCR process for nitrogen oxides removal, wherein the urea solution from the recovery section of a urea plant is subject to at least one step of evaporation, separating a vapour stream containing water and ammonia, and obtaining a concentrated and substantially ammonia-free solution, and said concentrated solution is diluted to the concentration of urea suitable for use in the SCR process.

公开(公告)号：US20200023330A1

公开(公告)日：2020-01-23

申请号：US16335825

申请日：2017-09-21

申请人： CASALE SA

发明人： Enrico RIZZI

IPC分类号： B01J8/04 ,  B01D53/86

摘要： Axial-radial flow reactor comprising a catalytic bed (1) of a hollow cylindrical shape, having a vertical axis (2), a base (5), a radial gas inlet section (3b), an axial gas inlet section (6) and a radial gas outlet section (4b), wherein the catalytic bed (1) comprises: a first cylindrical annular region (10) containing a layer of a first catalyst (A) and a layer of a second catalyst (B), the layer of the first catalyst being above the layer of the second catalyst; a second cylindrical annular region (9) coaxial to the first annular region and containing only the first catalyst (A).

公开(公告)号：US10508079B2

公开(公告)日：2019-12-17

申请号：US15764705

申请日：2016-09-08

申请人： Casale SA

发明人： Federico Maffietti

IPC分类号： C07C273/10 ,  B01J23/42 ,  B01J23/44 ,  C01C1/04 ,  B01D53/86 ,  C01B32/50 ,  B01D53/26 ,  C01B3/48

摘要： A process for removing hydrogen and methanol from a CO2 stream which contains hydrogen and methanol as contaminants, wherein hydrogen and methanol are removed by contacting the CO2 stream with a catalyst which oxidizes hydrogen to water and methanol to carbon dioxide, obtaining a purified CO2 stream.