公开(公告)号：US20120228225A1

公开(公告)日：2012-09-13

申请号：US13395262

申请日：2010-09-01

申请人： Paolo Casara ,  Alessandro Gianazza

发明人： Paolo Casara ,  Alessandro Gianazza

IPC分类号： B01D61/36

CPC分类号： B01D61/364 ,  B01D2313/22 ,  C01C1/10 ,  C02F1/04 ,  C02F1/44 ,  C02F1/447 ,  C02F2101/10 ,  C02F2101/16 ,  C02F2103/36 ,  C07C273/04

摘要： The present invention relates to a method for contemporaneously recovering ammonia and carbon dioxide from an aqueous solution thereof, possibly comprising their condensates, in a synthesis process of urea, characterized in that it comprises a hydrophobic microporous membrane distillation phase of an aqueous solution comprising ammonia, carbon dioxide and their saline compounds or condensates, said distillation being carried out at a temperature ranging from 50 to 250° C. and a pressure ranging from 50 KPa to 20 MPa absolute, with the formation of a residual aqueous solution, possibly comprising urea, and a gaseous permeate stream, comprising ammonia, carbon dioxide and water. The present invention also relates to an apparatus for effecting the above method and a production process of urea which comprises the above method.

摘要翻译： 本发明涉及一种在尿素的合成过程中同时从其水溶液中回收氨和二氧化碳的方法，其可能包含其缩合物，其特征在于其包含含有氨的水溶液的疏水微孔膜蒸馏相， 二氧化碳及其盐水化合物或缩合物，所述蒸馏在50-250℃的温度和绝对压力为50KPa至20MPa的压力下进行，形成可能包含尿素的残留水溶液， 和气态渗透物流，其包含氨，二氧化碳和水。 本发明还涉及一种用于实现上述方法的设备和包括上述方法的尿素的生产方法。

公开(公告)号：US09266745B2

公开(公告)日：2016-02-23

申请号：US13395262

申请日：2010-09-01

申请人： Paolo Casara ,  Alessandro Gianazza

发明人： Paolo Casara ,  Alessandro Gianazza

IPC分类号： B01D15/00 ,  B01D61/00 ,  C02F1/44 ,  C02F1/04 ,  C01C1/10 ,  B01D61/36 ,  C07C273/04

CPC分类号： B01D61/364 ,  B01D2313/22 ,  C01C1/10 ,  C02F1/04 ,  C02F1/44 ,  C02F1/447 ,  C02F2101/10 ,  C02F2101/16 ,  C02F2103/36 ,  C07C273/04

摘要： The present invention relates to a method for contemporaneously recovering ammonia and carbon dioxide from an aqueous solution thereof, possibly comprising their condensates, in a synthesis process of urea, characterized in that it comprises a hydrophobic microporous membrane distillation phase of an aqueous solution comprising ammonia, carbon dioxide and their saline compounds or condensates, said distillation being carried out at a temperature ranging from 50 to 250° C. and a pressure ranging from 50 KPa to 20 MPa absolute, with the formation of a residual aqueous solution, possibly comprising urea, and a gaseous permeate stream, comprising ammonia, carbon dioxide and water. The present invention also relates to an apparatus for effecting the above method and a production process of urea which comprises the above method.

摘要翻译： 本发明涉及一种在尿素的合成过程中同时从其水溶液中回收氨和二氧化碳的方法，其可能包含其缩合物，其特征在于其包含含有氨的水溶液的疏水微孔膜蒸馏相， 二氧化碳及其盐水化合物或缩合物，所述蒸馏在50-250℃的温度和绝对压力为50KPa至20MPa的压力下进行，形成可能包含尿素的残留水溶液， 和气态渗透物流，其包含氨，二氧化碳和水。 本发明还涉及一种用于实现上述方法的设备和包括上述方法的尿素的生产方法。

公开(公告)号：US20110091369A1

公开(公告)日：2011-04-21

申请号：US12743717

申请日：2008-11-14

申请人： Paolo Casara ,  Alessandro Gianazza ,  Ivano Miracca ,  Giuseppe Merelli ,  Gustavo Capannelli ,  Aldo Bottino

发明人： Paolo Casara ,  Alessandro Gianazza ,  Ivano Miracca ,  Giuseppe Merelli ,  Gustavo Capannelli ,  Aldo Bottino

IPC分类号： C01C1/04 ,  C07C273/02 ,  B01D61/42

CPC分类号： C07C273/04 ,  B01D53/326 ,  B01D53/58 ,  B01D53/75 ,  B01D61/44 ,  B01D61/445 ,  C02F1/20 ,  C02F1/441 ,  C02F1/4693 ,  C07C273/16 ,  Y02P20/582

摘要： The present invention relates to a process for the recovery of ammonia contained in a gaseous purging stream produced in a synthesis process of urea, comprising the following phases: a) subjecting the gaseous purging stream to a washing with an aqueous acidic solution, at a pH ranging from 1 to 6, with the formation of a first purified gaseous stream and an aqueous solution containing an ammonium salt; b) subjecting the aqueous solution containing the ammonium salt coming from phase a) to stripping, after treatment with a strong base, at a temperature ranging from 50 to 250° C. and a pressure ranging from 1 to 40 absolute bar, with the formation of a second gaseous stream comprising NH3, H2O and possibly CO2 and a solution containing a salt of the cation of said strong base; c) subjecting the solution containing the salt of the cation of the strong base coming from phase b) to a Membrane Electrochemical Process (MEP) with the formation of an aqueous solution of the acid used in phase a), an aqueous solution of the base used in phase b) and possibly a diluted aqueous solution of the cation salt of the strong base; d) recycling said aqueous solution of the acid and aqueous solution of the base to phase a) and to phase b) respectively, and recycling said second gaseous stream coming from phase b) to the urea synthesis process. The relative equipment is also described.

摘要翻译： 本发明涉及一种在尿素合成过程中产生的气态吹扫液中所含的氨的回收方法，包括以下阶段：a）在酸性溶液中以pH值进行洗涤， 形成第一纯化气流和含有铵盐的水溶液; b）使来自a）相的含有铵盐的水溶液在强碱处理后，在50-250℃的温度和1至40绝对巴的压力下进行汽提，同时形成 包含NH 3，H 2 O和可能的CO 2的第二气流和含有所述强碱的阳离子的盐的溶液; c）在相a）中使用的酸的水溶液的形成，将含有来自相b）的强碱的阳离子盐的溶液经受膜电化学工艺（MEP），将碱的水溶液 在阶段b）中使用，并且可能是强碱的阳离子盐的稀释水溶液; d）将所述碱的酸和水溶液的所述水溶液分别循环到a）相和b相，并将来自b）相的所述第二气流再循环到尿素合成过程。 还描述了相关设备。

公开(公告)号：US20120039787A1

公开(公告)日：2012-02-16

申请号：US13143988

申请日：2010-01-11

申请人： Paolo Casara ,  Alessandro Gianazza ,  Ivano Miracca

发明人： Paolo Casara ,  Alessandro Gianazza ,  Ivano Miracca

IPC分类号： C01C1/12 ,  B01D53/58

CPC分类号： B01D53/1493 ,  B01D53/1425 ,  B01D53/58 ,  B01D61/364 ,  B01D2257/40 ,  B01D2257/406 ,  B01D2257/70 ,  B01D2325/38 ,  C01C1/12

摘要： A process for the recovery of ammonia contained in a gaseous stream is described, said process comprising the following phases: (a) subjecting the gaseous stream containing ammonia to a washing (S) with an aqueous washing solution (5a) having a pH lower than 7.0, with the formation of a purified gaseous stream (6) and an aqueous solution (7) containing an ammonium salt; (b) subjecting the aqueous solution containing the ammonium salt coming from phase (a) to a distillation process (MD) with a hydrophobic microporous membrane at a temperature ranging from 50 to 250° C. and a pressure ranging from 50 KPa to 4 MPa absolute with the formation of a regenerated washing solution (16) and a gaseous stream (18) comprising NH3 and H2O; (c) recycling said generated washing solution to phase (a). The equipment for carrying out the above process is also described.

摘要翻译： 描述了用于回收气态物流中所含的氨的方法，所述方法包括以下阶段：（a）使含有氨的气态物质用pH低于水的洗涤溶液（5a）进行洗涤（S） 7.0，形成纯化的气流（6）和含有铵盐的水溶液（7）; （b）在50-250℃的温度和50KPa至4MPa的压力下，将来自相（a）的含有相（a）的铵盐的水溶液用疏水性微孔膜进行蒸馏处理（MD） 绝对形成再生洗涤溶液（16）和包含NH 3和H 2 O的气流（18）; （c）将所生成的洗涤溶液再循环到相（a）。 还描述了用于执行上述过程的设备。

公开(公告)号：US08758485B2

公开(公告)日：2014-06-24

申请号：US13143988

申请日：2010-01-11

申请人： Paolo Casara ,  Alessandro Gianazza ,  Ivano Miracca

发明人： Paolo Casara ,  Alessandro Gianazza ,  Ivano Miracca

IPC分类号： B01D47/00

CPC分类号： B01D53/1493 ,  B01D53/1425 ,  B01D53/58 ,  B01D61/364 ,  B01D2257/40 ,  B01D2257/406 ,  B01D2257/70 ,  B01D2325/38 ,  C01C1/12

摘要： A process for the recovery of ammonia contained in a gaseous stream is described, said process comprising the following phases: (a) subjecting the gaseous stream containing ammonia to a washing (S) with an aqueous washing solution (5a) having a pH lower than 7.0, with the formation of a purified gaseous stream (6) and an aqueous solution (7) containing an ammonium salt; (b) subjecting the aqueous solution containing the ammonium salt coming from phase (a) to a distillation process (MD) with a hydrophobic microporous membrane at a temperature ranging from 50 to 250° C. and a pressure ranging from 50 KPa to 4 MPa absolute with the formation of a regenerated washing solution (16) and a gaseous stream (18) comprising NH3 and H2O; (c) recycling said generated washing solution to phase (a). The equipment for carrying out the above process is also described.

摘要翻译： 描述了用于回收气态物流中所含的氨的方法，所述方法包括以下阶段：（a）使含有氨的气态物质用pH低于水的洗涤溶液（5a）进行洗涤（S） 7.0，形成纯化的气流（6）和含有铵盐的水溶液（7）; （b）在50-250℃的温度和50KPa至4MPa的压力下，将来自相（a）的含有相（a）的铵盐的水溶液用疏水性微孔膜进行蒸馏处理（MD） 绝对形成再生洗涤溶液（16）和包含NH 3和H 2 O的气流（18）; （c）将所生成的洗涤溶液再循环到相（a）。 还描述了用于执行上述过程的设备。

公开(公告)号：US08293201B2

公开(公告)日：2012-10-23

申请号：US12743717

申请日：2008-11-14

申请人： Paolo Casara ,  Alessandro Gianazza ,  Ivano Miracca ,  Giuseppe Merelli ,  Gustavo Capannelli ,  Aldo Bottino

发明人： Paolo Casara ,  Alessandro Gianazza ,  Ivano Miracca ,  Giuseppe Merelli ,  Gustavo Capannelli ,  Aldo Bottino

IPC分类号： B01J19/00 ,  C01C1/02

CPC分类号： C07C273/04 ,  B01D53/326 ,  B01D53/58 ,  B01D53/75 ,  B01D61/44 ,  B01D61/445 ,  C02F1/20 ,  C02F1/441 ,  C02F1/4693 ,  C07C273/16 ,  Y02P20/582

摘要： A process for the recovery of ammonia contained in a gaseous purging stream produced in a synthesis process of urea.

摘要翻译： 在尿素的合成过程中产生的气态吹扫液中所含的氨的回收方法。

公开(公告)号：US09341419B2

公开(公告)日：2016-05-17

申请号：US11761735

申请日：2007-06-12

申请人： Alessandro Gianazza ,  Luca Mairano ,  Giuseppe Merelli ,  Domenico Sanfilippo

发明人： Alessandro Gianazza ,  Luca Mairano ,  Giuseppe Merelli ,  Domenico Sanfilippo

IPC分类号： F28F19/00 ,  F28F9/18 ,  F28F21/08 ,  F16L13/02 ,  F28F19/06

CPC分类号： F28F19/06 ,  B23P15/26 ,  F16L13/0236 ,  F28F9/18 ,  F28F21/081 ,  F28F21/084 ,  F28F21/086 ,  F28F2275/062 ,  F28F2275/068 ,  Y02P80/156 ,  Y10T29/49718

摘要： A bimetallic tube consisting of at least one tubular element in a first metal resistant to the corrosive and/or erosive action of a process fluid with which it is put in contact, having at least one end, or an area close to an end, externally coated with a layer of a second metal, different from the first and more suitable, with respect to this, for being seal-welded to a support.Tube bundle equipment to be used for thermal exchange operations at high temperatures and pressures, under conditions of high aggressiveness of the process fluids, wherein the tube bundle comprises at least one tube having the above characteristics.Said equipment is particularly used as a heat exchanger and decomposer, for example as a stripper, in the cycle of urea synthesis processes where there are conditions of high pressure, high temperatures, high aggressiveness of the process fluids, and in which the tube bundle consists of at least one tube having the above characteristics.

摘要翻译： 一种双金属管，由至少一个第一金属管状元件组成，其耐受其与其接触的工艺流体的腐蚀性和/或侵蚀作用，具有至少一个端部或接近端部的区域，外部 涂覆有与第一金属不同的第二金属层，并且对于密封焊接到支撑体上。 管束设备，用于在高温和高压下在过程流体的高侵蚀性条件下进行热交换操作，其中管束包括至少一个具有上述特征的管。 所述设备在尿素合成过程的循环中特别用作热交换器和分解器，例如作为汽提器，其中存在高压，高温，过程流体的高侵蚀性，并且其中管束组成 具有上述特征的至少一个管。

公开(公告)号：US09068781B2

公开(公告)日：2015-06-30

申请号：US13318793

申请日：2010-04-27

申请人： Alessandro Gianazza ,  Lino Carlessi

发明人： Alessandro Gianazza ,  Lino Carlessi

IPC分类号： F28F25/06 ,  F28D3/02 ,  F28D3/04 ,  B01J19/24 ,  F28F19/06

CPC分类号： F28D3/02 ,  B01J19/2425 ,  F28D3/04 ,  F28F19/06 ,  F28F25/06 ,  Y10T29/49391

摘要： Tube-bundle equipment of the falling liquid film type, comprising a vertical cylindrical body closed at the ends and divided into at least an upper section, an intermediate section and a lower section by means of two perforated tube sheets arranged transversally to support the tubes forming the bundle, wherein each of said tubes is surmounted, on the upper end, by a ferrule, for the inlet and distribution of the liquid in the form of a film, which comprises in the upper part, one or more openings for the outlet of vapors, at an intermediate height one or more openings, preferably tangential, for the inlet of the liquid and below, a circular base for resting on said tube from which an internal cylindrical section, inserted in the tube for a length varying from 10 to 200 mm, protrudes downwards together with an outer metallic strip for a length of at least 2 mm, so that, in the circular area defined between said outer metallic strip and said protruding cylindrical section, there is a gasket, inserted between said circular base of the ferrule and said upper edge of the tube.

摘要翻译： 下降液膜类型的管束设备包括垂直圆柱体，其端部封闭，并且通过横向布置以支撑管形成的两个穿孔管板至少分成上部段，中间部分和下部段 其中每个所述管在上端被一个套圈覆盖，用于将膜形式的液体入口和分配，其中在上部包括用于出口的一个或多个开口 在中间高度处的一个或多个开口，优选是切向的，用于液体入口和下方的蒸汽，用于搁置在所述管上的圆形基部，从该管的内部插入管中的长度为10至200的长度的内部圆柱形部分 mm，与外部金属条一起向下突出至少2mm的长度，使得在限定在所述外部金属条和所述突出圆柱形部分之间的圆形区域中，存在气体 插入在所述套圈的所述圆形基座和所述管的所述上边缘之间。

公开(公告)号：US08518337B2

公开(公告)日：2013-08-27

申请号：US13003988

申请日：2009-07-13

申请人： Domenico Sanfilippo ,  Luca Mairano ,  Alessandro Gianazza ,  Lino Carlessi

发明人： Domenico Sanfilippo ,  Luca Mairano ,  Alessandro Gianazza ,  Lino Carlessi

IPC分类号： B01J19/00 ,  F28F19/00

CPC分类号： F28F19/06 ,  B01J19/02 ,  B01J19/2425 ,  B01J2219/0236 ,  F28D7/16 ,  F28F9/02 ,  F28F9/0229 ,  F28F2265/16 ,  Y10T29/49391 ,  Y10T29/49393

摘要： Tube-bundle equipment for heat exchange operations at high pressures and temperatures, under conditions of high aggressiveness of the process fluids, comprising a titanium lining (11) and a series of tubes (1) consisting of at least one layer of zirconium (2), positioned in contact with said fluids, wherein the tube plate on which said tubes are inserted comprises an outer layer (S) of zirconium or an alloy thereof and an underlying layer (5) of titanium welded to the lining of the equipment. Said equipment is particularly used as a heat exchanger, for example as a stripper, in the high-pressure cycle of urea syntheses processes.

摘要翻译： 包括钛衬里（11）和由至少一层锆（2）组成的一系列管（1）的管道束设备，用于在高压和高温下进行的热交换操作， 定位成与所述流体接触，其中所述管被插入其上的管板包括锆或其合金的外层（S）和焊接到设备衬里的钛的下层（5）。 在尿素合成工艺的高压循环中，所述设备特别用作热交换器，例如汽提塔。

公开(公告)号：US20120097378A1

公开(公告)日：2012-04-26

申请号：US13318793

申请日：2010-04-27

申请人： Alessandro Gianazza ,  Lino Carlessi

发明人： Alessandro Gianazza ,  Lino Carlessi

IPC分类号： F28F1/00 ,  B23P15/26

CPC分类号： F28D3/02 ,  B01J19/2425 ,  F28D3/04 ,  F28F19/06 ,  F28F25/06 ,  Y10T29/49391

摘要： Tube-bundle equipment of the falling liquid film type, comprising a vertical cylindrical body closed at the ends and divided into at least an upper section, an intermediate section and a lower section by means of two perforated tube sheets arranged transversally to support the tubes forming the bundle, wherein each of said tubes is surmounted, on the upper end, by a ferrule, for the inlet and distribution of the liquid in the form of a film, which comprises in the upper part, one or more openings for the outlet of vapours, at an intermediate height one or more openings, preferably tangential, for the inlet of the liquid and below, a circular base for resting on said tube from which an internal cylindrical section, inserted in the tube for a length varying from 10 to 200 mm, protrudes downwards together with an outer metallic strip for a length of at least 2 mm, so that, in the circular area defined between said outer metallic strip and said protruding cylindrical section, there is a gasket, inserted between said circular base of the ferrule and said upper edge of the tube.

摘要翻译： 下降液膜类型的管束设备包括垂直圆柱体，其端部封闭，并且通过横向布置以支撑管形成的两个穿孔管板至少分成上部段，中间部分和下部段 其中每个所述管在上端被一个套圈覆盖，用于将膜形式的液体入口和分配，其中在上部包括用于出口的一个或多个开口 在中间高度处的一个或多个开口，优选是切向的，用于液体入口和下方的蒸汽，用于搁置在所述管上的圆形基部，从该管的内部插入管中的长度为10至200的长度的内部圆柱形部分 mm，与外部金属条一起向下突出至少2mm的长度，使得在限定在所述外部金属条和所述突出圆柱形部分之间的圆形区域中，存在ga 插入在所述套圈的所述圆形基座和所述管的所述上边缘之间。