WO2011032786A1 - Removal of urea and ammonia from exhaust gases - Google Patents
Removal of urea and ammonia from exhaust gases Download PDFInfo
- Publication number
- WO2011032786A1 WO2011032786A1 PCT/EP2010/061588 EP2010061588W WO2011032786A1 WO 2011032786 A1 WO2011032786 A1 WO 2011032786A1 EP 2010061588 W EP2010061588 W EP 2010061588W WO 2011032786 A1 WO2011032786 A1 WO 2011032786A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- urea
- ammonium sulphate
- melt
- ammonia
- water
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C3/00—Fertilisers containing other salts of ammonia or ammonia itself, e.g. gas liquor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/58—Ammonia
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/80—Semi-solid phase processes, i.e. by using slurries
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/02—Preparation, purification or separation of ammonia
- C01C1/12—Separation of ammonia from gases and vapours
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/22—Sulfites of ammonium
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C3/00—Fertilisers containing other salts of ammonia or ammonia itself, e.g. gas liquor
- C05C3/005—Post-treatment
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C9/00—Fertilisers containing urea or urea compounds
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C273/00—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups
- C07C273/02—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups of urea, its salts, complexes or addition compounds
- C07C273/14—Separation; Purification; Stabilisation; Use of additives
- C07C273/16—Separation; Purification
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/50—Inorganic acids
- B01D2251/506—Sulfuric acid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
- B01D2257/406—Ammonia
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
Definitions
- Urea dust and ammonia are known to be present in exhaust gases from urea plants, urea granulation towers, urea prilling towers and chemical fertilizer plants. Such plants in particular release waste air streams that contain dust and ammonia resulting from various process steps. This air stream must be purified before being passed into the environment or recycled back into the process. Such waste air stream result in particular from granulation, prilling and product cooling process steps.
- JP9227493 describes a method for recovery of urea dust and ammonia from such a gas stream by contacting said gas stream with an aqueous sulphuric acid solution, thus forming an acid solution of ammonium sulphate and urea.
- a disadvantage of the known process is, that the resulting product is a solution, which can hardly be used as a fertilizer due to its high transport costs.
- JP9227493 Another problem of the method described in JP9227493 is that the resulting solution is an acidic solution, which is not only a disadvantage for the soil wherein it is used as a fertilizer, but it results in corrosion in metal equipment used to concentrate, handle and transport the acidic solution, unless special, high cost, materials of construction are used for such metal equipment.
- This problem can be solved, by adding ammonia to the acidic solution before the acidic solution is concentrated, thus forming a neutralized solution of ammonium sulphate and urea in water.
- a further problem of the method described in JP9227493 is that the sulphur (S) to nitrogen (N) ratio in the produced liquid fertilizer is depending on the ammonia to urea ratio in the gas stream from which the urea and ammonia are recovered. This poses a problem since: - Depending on the source of this gas stream, this ratio of ammonia to urea in this gas stream, and the resulting S/N ratio in the produced fertilizer may not be stable over time. This therefore results in a non-stable quality of the produced fertilizer.
- an optimal S/N ratio can be defined from an agronomic point of view.
- the coincidental ammonia to urea ratio in said gas stream in general will not result in the same optimal S/N ratio in the fertilizer produced.
- the neutralized solution is concentrated by vaporization of at least part of the water phase, thus forming water vapor and a melt comprising less than 5 wt% of water.
- the vaporization is carried out in more than one step until the amount of water is less than 5 wt%. This allows reducing the amount of water in the melt to less than 1 wt%, and even to less than 0.3 wt%.
- the melt is transferred into urea and ammonium sulphate comprising solid particles.
- This process can be carried out in a granulator, or prilling tower. However this would reintroduce (on a smaller scale) the problem of ammonia and dust loaded air. Therefore this process is preferably carried out in a pelletizer, comprising a feeding device, a solidification/cooling belt and a device to remove the formed pellets from the belt, by feeding a urea-comprising liquid to the feeding device from which droplets of the urea-comprising liquid are dosed to the belt, whereon the urea- comprising droplets solidify, where after the formed urea- comprising particles are removed from the belt.
- the belt is cooled from the other side, preferably by means of cooling water.
- Pelletizing using the above mentioned process does not produce a large dust/ammonia loaded air flow, which would reintroduce the original problem albeit on a smaller scale.
- Fig 1 is a schematic system for implementing an embodiment of the present invention.
- Fig 2 is schematic system for implementing of another embodiment of the present invention.
- Fig 3 is a schematic system for implementing of a further embodiment of the present invention.
- FIG. 1 A system for implementing the method of the invention is shown in Fig. 1.
- a gas stream comprising air, urea and ammonia (1 1 ) is contacted in a scrubber (1 ) with an aqueous sulphuric acid solution (12), thus forming an acidic solution of urea and ammonium sulphate.
- Scrubber (1 ) can be selected from any of the wet-type scrubbers well known in the industry. It may, for instance, be selected from the type of scrubbers as summarized in Chemical Engineers Handbook (Perry and Chilton), fifth edition, page 20-94 to 20-103.
- Stream 1 1 usually has a relative high temperature (70 - 1 10 °C), and may be rather dry. As a result of this, quite some water may evaporate in the scrubber. In many cases it therefore will be required to add make-up water (15) to the scrubber in order to assure that the concentration of urea and ammonium sulphate in the liquid phase in the scrubber remains below the solubility limits.
- make-up water (15)
- urea/ammonium sulphate (UAS) solution over the scrubber may be required for proper removal of ammonia and dust from the air stream.
- UAS urea/ammonium sulphate
- the cleaned air leaves the scrubber via line 18.
- the acidic solution of urea and ammonium sulphate is passed through line (21 ) to concentration unit (2), which may comprise at least one concentrator Water vapor leaves the concentration unit (2) via line (16).
- concentration unit (2) the acidic solution of urea and ammonia is concentrated to a melt, comprising less than 5 wt% of water.
- the concentration unit (2) may consist of one or more evaporators in parallel or in series. These evaporators may be selected from evaporators, as they are well known in the process industry. They may, for instance, be selected from the evaporators as summarized in Chemical Engineers Handbook (Perry and Chilton), fifth edition, pages 1 1 -27 to 1 1-38. Urea is vulnerable for decomposition (e.g.
- the evaporators are usually selected from the types 'falling film' or 'Long tube vertical' (refer to fig 1 1 -16 in Chemical Engineers Handbook (Perry and Chilton), fifth edition) since they offer low residence time.
- the evaporators preferably are operated under vacuum, in order to minimize the required temperature.
- the vacuum in the evaporators can be maintained using a system of vacuum condensers and steam-jet ejectors (not shown in the figure), or other systems, that are well known in the industry.
- the concentrated UAS melt leaves the concentration unit via line (22) to mixer (3).
- Solid ammonium sulphate is also introduced into the mixer (3), in order to increase the ammonium sulphate to urea ratio to the desired value.
- the dosing of ammonium sulphate to mixer (3) is controlled in such a way that a stable ammonium sulphate to urea ratio is obtained in the final product (17).
- Mixer (3) may be selected from any of the solid/liquid mixers well known in the industry. It may e.g. be selected from the mixers as summarized in Chemical Engineers Handbook (Perry and Chilton), fifth edition, pages 19-3 to 19-25. Selection of the mixer mainly is depending on the required ammonium sulphate to urea ratio. In case low
- the solid shaping step (4) may consist of granulation, prilling or pelletizing. It is of special advantage to select pelletizing as solid shaping process, since such a pelletizing process does not result in dust and ammonia loaden off-gas as is the case with prilling and granulation processes. An example of such a pelletizing process is described in WO 2006/1 1 1331 A1 .
- Fig. 2 shows a system for implementing the method of the invention, wherein ammonia or ammonia water (14) is added to the acid solution in a neutralizer (5) before the acidic solution (21 ) is concentrated, thus forming a neutralized solution of urea and ammonium sulphate in water that is passed through line (24) to the concentration unit (2).
- the neutralizing process (5) may be accommodated in a mixing vessel with agitator, as well known in the industry. Taking into account the strong chemical affinity between sulphuric acid and ammonia, the neutralizing process may even be accommodated in a much simpler way, e.g. by supplying turbulent flow and sufficient residence time in the process line that transports UAS solution 24 to the concentration unit (2).
- Figure 3 shows a further embodiment of the invention.
- the embodiment as shown in figure 3 offers special advantages over those as shown in figures 1 and 2, in case the required ammonium sulphate to urea ratio in the final UAS product is limited.
- a gas stream comprising air, urea and ammonia (1 1 ) is contacted in a scrubber (1 ) with an aqueous sulphuric acid solution (12), thus forming an acidic solution of urea and ammonium sulphate.
- the cleaned air leaves the scrubber via (18).
- Make-up water is introduced into the scrubber via (15), in such an amount that no solids are formed in the streams (21 ) and (24)
- the formed acidic solution of urea and ammonium sulphate leaves the scrubber via (21 ), to be introduced in mixer (3).
- NH 3 (or ammonia water) is introduced into mixer (3) via line (14) in such an amount that the excess sulphuric acid present in (21 ) is neutralized.
- Additional solid ammonium sulphate is added to mixer (3) via line (13).
- Mixer (3) is an agitated vessel, where proper agitation ensures that all of the solid ammonium sulphate that is added to the mixer is dissolved before the enriched UAS solution leaves the mixer via (24) to concentration unit (2).
- the UAS solution is concentrated to such an extend that the UAS melt leaving the concentration unit via (23) has a water content of less the 5% by weight.
- This concentrated melt is transformed into a solid UAS product in solid shaping unit (4) in the same way as described for figure 1.
- figure 3 offers the advantage that the process steps (5, neutralizer) and (3, mixer) now are combined in one step (3, mixer). This offers the advantage of lower capital investment for the process as described under figure 3.
- An advantage of the process as described under figure 2 as compared to the process as described under figure 3 is that the ammonium sulphate concentration in concentration step (2) can be higher without risking line blockage. Therefore the application of the process as described under figure 3 is limited to such cases, where the desired S/N ratio in product (17) is limited to such a value that the UAS + melt (23) contains no solid ammonium sulphate, or only such a limited quantity of solid ammonium sulphate that stream (23) remains a transportable slurry.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Biomedical Technology (AREA)
- Inorganic Chemistry (AREA)
- Fertilizers (AREA)
- Treating Waste Gases (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
Claims
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR112012006029-5A BR112012006029B1 (en) | 2009-09-16 | 2010-08-10 | Method to recover urea and ammonia dust from a gas stream |
EA201270417A EA021089B1 (en) | 2009-09-16 | 2010-08-10 | Removal of urea and ammonia from exhaust gases |
EP10740669.6A EP2477961B2 (en) | 2009-09-16 | 2010-08-10 | Removal of urea and ammonia from exhaust gases |
PL10740669.6T PL2477961T5 (en) | 2009-09-16 | 2010-08-10 | Removal of urea and ammonia from exhaust gases |
CA2774246A CA2774246C (en) | 2009-09-16 | 2010-08-10 | Removal of urea and ammonia from exhaust gases |
US13/496,192 US9464009B2 (en) | 2009-09-16 | 2010-08-10 | Removal of urea and ammonia from exhaust gases |
CN2010800414897A CN102596901A (en) | 2009-09-16 | 2010-08-10 | Removal of urea and ammonia from exhaust gases |
US14/098,496 US9556077B2 (en) | 2009-09-16 | 2013-12-05 | Removal of urea and ammonia from exhaust gases |
US15/421,265 US10640428B2 (en) | 2009-09-16 | 2017-01-31 | Removal of urea and ammonia from exhaust gases |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP09170447A EP2301917A1 (en) | 2009-09-16 | 2009-09-16 | Removal of urea and ammonia from exhaust gases |
EP09170447.8 | 2009-09-16 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/496,192 A-371-Of-International US9464009B2 (en) | 2009-09-16 | 2010-08-10 | Removal of urea and ammonia from exhaust gases |
US14/098,496 Continuation US9556077B2 (en) | 2009-09-16 | 2013-12-05 | Removal of urea and ammonia from exhaust gases |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011032786A1 true WO2011032786A1 (en) | 2011-03-24 |
Family
ID=41171130
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2010/061588 WO2011032786A1 (en) | 2009-09-16 | 2010-08-10 | Removal of urea and ammonia from exhaust gases |
Country Status (10)
Country | Link |
---|---|
US (3) | US9464009B2 (en) |
EP (2) | EP2301917A1 (en) |
CN (1) | CN102596901A (en) |
AR (1) | AR079185A1 (en) |
BR (1) | BR112012006029B1 (en) |
CA (1) | CA2774246C (en) |
EA (1) | EA021089B1 (en) |
MY (1) | MY160240A (en) |
PL (1) | PL2477961T5 (en) |
WO (1) | WO2011032786A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150133690A1 (en) * | 2012-05-03 | 2015-05-14 | Stamicarbon B.V. | Urea production plant |
EP3020702A1 (en) * | 2014-11-12 | 2016-05-18 | Casale SA | Urea finishing process with acid scrubbing |
WO2018122379A1 (en) | 2016-12-30 | 2018-07-05 | Yara International Asa | Method for processing a gas stream comprising urea dust and ammonia |
WO2018122377A1 (en) | 2016-12-30 | 2018-07-05 | Yara International Asa | Processing of exhaust gases from a urea plant |
WO2019234816A1 (en) * | 2018-06-05 | 2019-12-12 | 三菱重工エンジニアリング株式会社 | Fertilizer production plant and fertilizer production method |
US10730009B2 (en) | 2017-02-28 | 2020-08-04 | Thyssenkrupp Fertilizer Technology Gmbh | Method for cleaning the exhaust air of a granulating system for producing a urea-containing granulate |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2746244A1 (en) * | 2012-12-21 | 2014-06-25 | Uhde Fertilizer Technology B.V. | Method for reducing the visible downwind detached plume opacity |
ITMI20130847A1 (en) * | 2013-05-24 | 2014-11-25 | Saipem Spa | METHOD AND SYSTEM FOR THE RECOVERY OF AMMONIUM SULPHATE FROM A GASEOUS FLOW OF A UREA PLANT |
EA032243B1 (en) | 2015-07-06 | 2019-04-30 | Стамикарбон Б.В. | Granulation of urea products |
CN109641812A (en) * | 2016-10-13 | 2019-04-16 | 科氏农艺服务有限责任公司 | The recycling of the component of waste stream is processed from urea and is reused |
EP3366670A1 (en) * | 2017-02-27 | 2018-08-29 | Casale Sa | A process and system to capture ammonia from a purge gas of a urea plant |
CN107349872A (en) * | 2017-03-16 | 2017-11-17 | 重庆宝禾复合肥有限公司 | A kind of efficient Granulation Equipments for chemical fertilizer production |
JP6851869B2 (en) * | 2017-03-17 | 2021-03-31 | 東洋エンジニアリング株式会社 | Urea granulation method |
EP3639916A1 (en) | 2018-10-18 | 2020-04-22 | Yara International ASA | Method and fluidized bed granulator for the production of granules from a slurry |
CA3141500C (en) | 2019-05-22 | 2023-08-01 | Stamicarbon B.V. | Treatment of offgas from urea finishing |
DE102019216931A1 (en) * | 2019-11-04 | 2021-05-06 | Thyssenkrupp Ag | Process and plant for the production of urea granulate |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3928015A (en) * | 1974-10-29 | 1975-12-23 | Tennessee Valley Authority | Manufacture of urea-ammonium sulate from sulfuric acid, ammonia, and urea |
JPH09227493A (en) | 1996-02-27 | 1997-09-02 | Toyo Eng Corp | Recovery of urea dust and ammonia from exhaust gas |
WO2001051429A2 (en) * | 2000-01-13 | 2001-07-19 | Skw Stickstoffwerke Piesteritz Gmbh | Method for producing a fertilizer containing ammonium sulfate and urea |
DE10133935A1 (en) | 2001-07-12 | 2003-01-30 | Piesteritz Stickstoff | Preparing fertilizer containing urea and ammonium sulfate, with the latter produced by reacting ammonia in urea-containing solution with sulfuric acid |
WO2006111331A1 (en) | 2005-04-18 | 2006-10-26 | Dsm Ip Assets B.V. | Process for the production of urea-comprising particles |
Family Cites Families (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2056283A (en) | 1933-09-13 | 1936-10-06 | Atmospherie Nitrogen Corp | Process for the production of urea and an ammonium salt |
BE537817A (en) | 1954-04-30 | |||
US2902342A (en) | 1955-01-27 | 1959-09-01 | Jr Bernard J Kerley | Method and apparatus for producing ammonium salts |
AT204054B (en) | 1956-08-03 | 1959-06-25 | Bergwerksgesellschaft Hibernia | Process for the preparation of a fertilizer containing urea and ammonium sulphate |
NL106294C (en) | 1957-11-21 | |||
CH369443A (en) | 1958-10-24 | 1963-05-31 | Inventa Ag | Process for the production of stabilized urea |
GB1217219A (en) | 1967-08-10 | 1970-12-31 | Mitsui Toatsu Chemicals | Process for recovering excess ammonia in urea synthesis |
US3619160A (en) | 1968-06-17 | 1971-11-09 | Exxon Research Engineering Co | Process for granulating x-o-o and x-o-y grades of fertilizer |
NL165712C (en) | 1970-05-30 | 1981-05-15 | Stamicarbon | METHOD AND APPARATUS FOR RECOVERY OF AMMONIA AND CARBON DIOXIDE FROM THE SPRAY GAS OF A UREUM SYNTHESIS IN SYNTHESIS PRESSURE. |
US3734707A (en) | 1970-10-22 | 1973-05-22 | Royster Co | Process for reducing emission of dust by granular fertilizer compositions |
UST969002I4 (en) | 1977-07-25 | 1978-04-04 | Tennessee Valley Authority | Granular ammonium phosphate sulfate and urea-ammonium phosphate sulfate using a common pipe-cross reactor |
UST101803I4 (en) | 1981-07-27 | 1982-05-04 | Jones Thomas M | Production of urea-ammonium sulfate suspension fertilizer |
JPS58145685A (en) | 1982-02-20 | 1983-08-30 | 東洋エンジニアリング株式会社 | Manufacture of granular composite fertilizer |
JPH0427493A (en) * | 1990-05-21 | 1992-01-30 | Shoichi Yoshinaga | Cleaning and sterilizing device for water and method for utilizing cleaned and sterilized water |
US5135561A (en) | 1991-08-22 | 1992-08-04 | Tennessee Valley Authority | Ammonium sulfate suspension intermediates for nitrogen-sulfur fluids |
IT1264564B1 (en) | 1993-06-09 | 1996-10-04 | Snam Progetti | PROCEDURE FOR THE REDUCTION OF THE AMMONIA CONTENT PRESENT IN A GASEOUS WASTE OF THE PLANTS FOR THE PRODUCTION OF UREA |
JP2000001466A (en) | 1998-06-12 | 2000-01-07 | Toyo Eng Corp | Recovery and utilization of urea dust and ammonia in exhaust gas |
JP2000279736A (en) | 1999-03-29 | 2000-10-10 | Toyo Eng Corp | Device for treating fluid containing urea dust and ammonia and treating method using the same and urea production facility installing the same |
DE10159734A1 (en) * | 2001-12-05 | 2003-06-18 | Jerzy Mackowiak | Method and device for removing ammonium from waste water and for recovering valuable materials |
NL1020665C2 (en) | 2002-05-23 | 2003-11-25 | Dsm Nv | Process for removing ammonia from an ammonia-containing gas stream. |
DE10346519A1 (en) | 2003-10-02 | 2005-05-04 | Uhde Gmbh | Process for the removal of ammonia and dust from an exhaust gas resulting from the production of fertilizers |
NO326272B1 (en) * | 2004-07-01 | 2008-10-27 | Yara Int Asa | Process for the production of fertilizers containing urea and ammonium sulphate |
CA2588774C (en) | 2004-12-08 | 2014-10-28 | Dsm Ip Assets B.V. | Process for the removal of ammonia from an ammonia-containing gas stream |
EP1861335B1 (en) | 2005-03-02 | 2012-08-01 | YARA International ASA | Pipe reactor and plant for manufacturing of especially urea ammonium sulphate |
EP2119489A1 (en) | 2008-05-14 | 2009-11-18 | Uhde Fertilizer Technology B.V. | Method for reducing aerosol emissions in a urea granulation plant |
EP2192099A1 (en) * | 2008-11-28 | 2010-06-02 | Uhde Fertilizer Technology B.V. | Urea granulation process with an acidic scrubbing system and the subsequent integration of ammonium salt into urea granules |
-
2009
- 2009-09-16 EP EP09170447A patent/EP2301917A1/en not_active Withdrawn
-
2010
- 2010-08-10 WO PCT/EP2010/061588 patent/WO2011032786A1/en active Application Filing
- 2010-08-10 MY MYPI2012001189A patent/MY160240A/en unknown
- 2010-08-10 EA EA201270417A patent/EA021089B1/en not_active IP Right Cessation
- 2010-08-10 CN CN2010800414897A patent/CN102596901A/en active Pending
- 2010-08-10 PL PL10740669.6T patent/PL2477961T5/en unknown
- 2010-08-10 EP EP10740669.6A patent/EP2477961B2/en active Active
- 2010-08-10 BR BR112012006029-5A patent/BR112012006029B1/en active IP Right Grant
- 2010-08-10 CA CA2774246A patent/CA2774246C/en active Active
- 2010-08-10 US US13/496,192 patent/US9464009B2/en active Active
- 2010-09-16 AR ARP100103370A patent/AR079185A1/en active IP Right Grant
-
2013
- 2013-12-05 US US14/098,496 patent/US9556077B2/en active Active
-
2017
- 2017-01-31 US US15/421,265 patent/US10640428B2/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3928015A (en) * | 1974-10-29 | 1975-12-23 | Tennessee Valley Authority | Manufacture of urea-ammonium sulate from sulfuric acid, ammonia, and urea |
JPH09227493A (en) | 1996-02-27 | 1997-09-02 | Toyo Eng Corp | Recovery of urea dust and ammonia from exhaust gas |
WO2001051429A2 (en) * | 2000-01-13 | 2001-07-19 | Skw Stickstoffwerke Piesteritz Gmbh | Method for producing a fertilizer containing ammonium sulfate and urea |
DE10133935A1 (en) | 2001-07-12 | 2003-01-30 | Piesteritz Stickstoff | Preparing fertilizer containing urea and ammonium sulfate, with the latter produced by reacting ammonia in urea-containing solution with sulfuric acid |
WO2006111331A1 (en) | 2005-04-18 | 2006-10-26 | Dsm Ip Assets B.V. | Process for the production of urea-comprising particles |
Non-Patent Citations (1)
Title |
---|
DATABASE WPI Week 199745, Derwent World Patents Index; AN 1997-486394, XP002551720 * |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9732033B2 (en) | 2012-05-03 | 2017-08-15 | Stamicarbon B.V. | Urea production plant |
US20150133690A1 (en) * | 2012-05-03 | 2015-05-14 | Stamicarbon B.V. | Urea production plant |
EP2844640B1 (en) | 2012-05-03 | 2018-08-29 | Stamicarbon B.V. | Urea production plant |
US9458098B2 (en) * | 2012-05-03 | 2016-10-04 | Stamicarbon B.V. | Urea production plant |
RU2675828C2 (en) * | 2014-11-12 | 2018-12-25 | Касале Са | Method for finishing urea with acid washing |
CN107001248A (en) * | 2014-11-12 | 2017-08-01 | 卡萨勒有限公司 | Acid elution urea method for finishing processing |
WO2016074813A1 (en) * | 2014-11-12 | 2016-05-19 | Casale Sa | Urea finishing process with acid scrubbing |
EP3020702A1 (en) * | 2014-11-12 | 2016-05-18 | Casale SA | Urea finishing process with acid scrubbing |
CN107001248B (en) * | 2014-11-12 | 2018-12-28 | 卡萨勒有限公司 | Acid elution urea method for finishing processing |
US10486125B2 (en) | 2014-11-12 | 2019-11-26 | Casale Sa | Urea finishing process with acid scrubbing |
AU2015345542B2 (en) * | 2014-11-12 | 2020-03-26 | Casale Sa | Urea finishing process with acid scrubbing |
WO2018122379A1 (en) | 2016-12-30 | 2018-07-05 | Yara International Asa | Method for processing a gas stream comprising urea dust and ammonia |
WO2018122377A1 (en) | 2016-12-30 | 2018-07-05 | Yara International Asa | Processing of exhaust gases from a urea plant |
US10730009B2 (en) | 2017-02-28 | 2020-08-04 | Thyssenkrupp Fertilizer Technology Gmbh | Method for cleaning the exhaust air of a granulating system for producing a urea-containing granulate |
WO2019234816A1 (en) * | 2018-06-05 | 2019-12-12 | 三菱重工エンジニアリング株式会社 | Fertilizer production plant and fertilizer production method |
Also Published As
Publication number | Publication date |
---|---|
PL2477961T5 (en) | 2024-03-11 |
BR112012006029B1 (en) | 2022-03-22 |
US9464009B2 (en) | 2016-10-11 |
MY160240A (en) | 2017-02-28 |
BR112012006029A2 (en) | 2021-08-17 |
US9556077B2 (en) | 2017-01-31 |
EA201270417A1 (en) | 2012-08-30 |
US20140090433A1 (en) | 2014-04-03 |
CN102596901A (en) | 2012-07-18 |
EP2301917A1 (en) | 2011-03-30 |
US20120240649A1 (en) | 2012-09-27 |
AR079185A1 (en) | 2012-01-04 |
EP2477961A1 (en) | 2012-07-25 |
US10640428B2 (en) | 2020-05-05 |
EP2477961B2 (en) | 2023-12-06 |
US20170137330A1 (en) | 2017-05-18 |
PL2477961T3 (en) | 2016-10-31 |
EA021089B1 (en) | 2015-04-30 |
CA2774246C (en) | 2016-06-28 |
CA2774246A1 (en) | 2011-03-24 |
EP2477961B1 (en) | 2016-04-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US10640428B2 (en) | Removal of urea and ammonia from exhaust gases | |
RU2377182C2 (en) | Method of producing fertiliser which contains urea and ammonium sulphate | |
US10954186B2 (en) | Urea ammonium nitrate production comprising condensation | |
CA3091738C (en) | Urea production plant and scrubbing system | |
CA3166402C (en) | Ammonia removal from urea finishing | |
EP3562783B1 (en) | Processing of exhaust gases from a urea plant | |
US10654758B2 (en) | Urea ammonium nitrate production |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 201080041489.7 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 10740669 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2774246 Country of ref document: CA |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2010740669 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 201270417 Country of ref document: EA |
|
WWE | Wipo information: entry into national phase |
Ref document number: 13496192 Country of ref document: US |
|
REG | Reference to national code |
Ref country code: BR Ref legal event code: B01A Ref document number: 112012006029 Country of ref document: BR |
|
ENP | Entry into the national phase |
Ref document number: 112012006029 Country of ref document: BR Kind code of ref document: A2 Effective date: 20120316 |