IT1240675B - Procedimento per la concentrazione sotto vuoto di soluzioni di urea - Google Patents
Procedimento per la concentrazione sotto vuoto di soluzioni di ureaInfo
- Publication number
- IT1240675B IT1240675B IT20129A IT2012990A IT1240675B IT 1240675 B IT1240675 B IT 1240675B IT 20129 A IT20129 A IT 20129A IT 2012990 A IT2012990 A IT 2012990A IT 1240675 B IT1240675 B IT 1240675B
- Authority
- IT
- Italy
- Prior art keywords
- procedure
- vacuum concentration
- urea solutions
- urea
- solutions
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/34—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping with one or more auxiliary substances
- B01D3/38—Steam distillation
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C9/00—Fertilisers containing urea or urea compounds
- C05C9/005—Post-treatment
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S159/00—Concentrating evaporators
- Y10S159/16—Vacuum
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S203/00—Distillation: processes, separatory
- Y10S203/13—Spirits
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Fertilizers (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
Priority Applications (15)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT20129A IT1240675B (it) | 1990-04-24 | 1990-04-24 | Procedimento per la concentrazione sotto vuoto di soluzioni di urea |
CA002040525A CA2040525C (en) | 1990-04-24 | 1991-04-16 | Process for concentrating urea solutions under vacuum |
EP91200917A EP0454227B1 (en) | 1990-04-24 | 1991-04-18 | Process for concentrating urea solutions under vacuum |
ES91200917T ES2047978T3 (es) | 1990-04-24 | 1991-04-18 | Procedimiento para la concentracion de disoluciones de urea bajo vacio. |
AT91200917T ATE100442T1 (de) | 1990-04-24 | 1991-04-18 | Verfahren zur konzentrierung von harnstoffloesungen unter vakuum. |
US07/687,116 US5273623A (en) | 1990-04-24 | 1991-04-18 | Process for concentrating urea solution under vacuum |
DE69101022T DE69101022T2 (de) | 1990-04-24 | 1991-04-18 | Verfahren zur Konzentrierung von Harnstofflösungen unter Vakuum. |
SU914895239A RU1833373C (ru) | 1990-04-24 | 1991-04-23 | Cпocoб kohцehtpиpobahия pactbopob moчebиhы b bakууme |
AR91319509A AR246921A1 (es) | 1990-04-24 | 1991-04-23 | Procedimiento para la concentracion bajo vacio de soluciones de urea |
BG94302A BG60583B1 (bg) | 1990-04-24 | 1991-04-23 | Метод за концентриране на разтвори на карбамид във вакуум |
MX025486A MX173474B (es) | 1990-04-24 | 1991-04-23 | Procedimiento para la concentracion bajo vacio de una solucion de urea |
PL91290012A PL164999B1 (pl) | 1990-04-24 | 1991-04-24 | Sposób zatezania roztworów mocznika PL |
CN91103239A CN1043039C (zh) | 1990-04-24 | 1991-04-24 | 在真空条件下浓缩尿素溶液的方法 |
SA91110363A SA91110363B1 (ar) | 1990-04-24 | 1991-05-27 | عملية لتركيز محاليل البولة (اليوريا) تحت التفريغ |
US08/513,251 US5736003A (en) | 1990-04-24 | 1995-08-10 | Apparatus for concentrating urea solutions under vacuum |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT20129A IT1240675B (it) | 1990-04-24 | 1990-04-24 | Procedimento per la concentrazione sotto vuoto di soluzioni di urea |
Publications (3)
Publication Number | Publication Date |
---|---|
IT9020129A0 IT9020129A0 (it) | 1990-04-24 |
IT9020129A1 IT9020129A1 (it) | 1991-10-24 |
IT1240675B true IT1240675B (it) | 1993-12-17 |
Family
ID=11164044
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT20129A IT1240675B (it) | 1990-04-24 | 1990-04-24 | Procedimento per la concentrazione sotto vuoto di soluzioni di urea |
Country Status (14)
Country | Link |
---|---|
US (2) | US5273623A (it) |
EP (1) | EP0454227B1 (it) |
CN (1) | CN1043039C (it) |
AR (1) | AR246921A1 (it) |
AT (1) | ATE100442T1 (it) |
BG (1) | BG60583B1 (it) |
CA (1) | CA2040525C (it) |
DE (1) | DE69101022T2 (it) |
ES (1) | ES2047978T3 (it) |
IT (1) | IT1240675B (it) |
MX (1) | MX173474B (it) |
PL (1) | PL164999B1 (it) |
RU (1) | RU1833373C (it) |
SA (1) | SA91110363B1 (it) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
LT3607B (en) | 1990-10-05 | 1995-12-27 | Urea Casale Sa | Process for the production of urea by steps and implementation also on existing plants |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040255379A1 (en) * | 2002-03-29 | 2004-12-23 | Yu Zheng | Inflatable apparatus |
AT501763B1 (de) * | 2005-05-13 | 2006-11-15 | Arc Seibersdorf Res Gmbh | Verfahren zur ermittlung von helligkeitswerten |
US7370379B2 (en) * | 2005-09-07 | 2008-05-13 | Patent Category Corp. | Foldable inflatable furniture |
US8231775B2 (en) | 2009-06-25 | 2012-07-31 | Uop Llc | Pitch composition |
US8202480B2 (en) * | 2009-06-25 | 2012-06-19 | Uop Llc | Apparatus for separating pitch from slurry hydrocracked vacuum gas oil |
US8540870B2 (en) * | 2009-06-25 | 2013-09-24 | Uop Llc | Process for separating pitch from slurry hydrocracked vacuum gas oil |
CN103037946B (zh) * | 2010-07-29 | 2015-07-22 | 田边工业株式会社 | 减压喷雾干燥方法及减压喷雾干燥装置 |
CN103191878B (zh) * | 2012-01-10 | 2015-11-25 | 内蒙古鄂尔多斯联合化工有限公司 | 尿素生产系统中二段蒸发分离器的冲洗装置及方法 |
US9150470B2 (en) | 2012-02-02 | 2015-10-06 | Uop Llc | Process for contacting one or more contaminated hydrocarbons |
EP3452212B1 (en) * | 2016-05-03 | 2020-02-12 | Stamicarbon B.V. | Urea production with controlled biuret |
Family Cites Families (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA681148A (en) * | 1964-03-03 | J. B. Biekart Hendrik | Process of concentrating urea solutions to a practically water-free melt | |
US2702949A (en) * | 1952-03-07 | 1955-03-01 | Research Corp | Apparatus for drying |
US2933526A (en) * | 1956-02-25 | 1960-04-19 | Lonza Electric & Chem Works | Process for the manufacture of urea in granular form |
US2961464A (en) * | 1956-12-15 | 1960-11-22 | Stamicarbon | Urea concentration process |
GB926781A (en) * | 1959-06-02 | 1963-05-22 | Vulcan Cincinnati Inc | Dehydration of urea melts |
DE1248639B (it) * | 1959-07-03 | |||
US3147174A (en) * | 1959-10-14 | 1964-09-01 | Chemical Construction Corp | Low moisture urea melt |
US3130225A (en) * | 1962-02-12 | 1964-04-21 | Pullman Inc | Urea production |
US3348599A (en) * | 1964-04-03 | 1967-10-24 | Scientism Lab | Apparatus for dewatering and dehydrating slimes and the like |
US3223145A (en) * | 1964-05-20 | 1965-12-14 | Allied Chem | Evaporative concentration of aqueous urea |
NL141179B (nl) * | 1967-01-20 | 1974-02-15 | Whitlock Mfg Co | Werkwijze en inrichting voor de bereiding van ureum. |
US4069253A (en) * | 1970-07-01 | 1978-01-17 | Mitsui Toatsu Chemicals, Incorporated | Process for the production of water-free molten urea |
US3930931A (en) * | 1973-03-26 | 1976-01-06 | The General Tire & Rubber Company | Apparatus and method for stripping styrene from an aqueous dispersion of styrene-butadiene polymer latex |
US3985538A (en) * | 1974-10-24 | 1976-10-12 | Tennessee Valley Authority | Pipe reactor-continuous ammoniator process for production of granular phosphates |
GB1581761A (en) * | 1977-06-09 | 1980-12-17 | Azote Sa Cie Neerlandaise | Urea granulation |
FR2410870A1 (fr) * | 1977-11-30 | 1979-06-29 | Kernforschungsanlage Juelich | Procede et installation pour traiter des solutions residuaires contenant du nitrate d'ammonium de la technique nucleaire |
US4231839A (en) * | 1979-01-30 | 1980-11-04 | Cf Industries, Inc. | After-treatment processes and apparatus, especially for urea and ammonium nitrate plants |
US4376010A (en) * | 1981-04-14 | 1983-03-08 | Noranda Mines Limited | Spray drying with a plasma of superheated steam |
NL8201652A (nl) * | 1982-04-21 | 1983-11-16 | Unie Van Kunstmestfab Bv | Werkwijze voor de bereiding van ureum. |
US5232550A (en) * | 1987-04-27 | 1993-08-03 | Ohkawara Kakohki Co., Ltd. | Vacuum drying method |
SU1490111A1 (ru) * | 1987-05-08 | 1989-06-30 | Белорусский технологический институт им.С.М.Кирова | Способ выпаривани водных растворов мочевины и выпарной аппарат дл его осуществлени |
DE3825856A1 (de) * | 1988-07-29 | 1990-02-01 | Karlsruhe Wiederaufarbeit | Verfahren zum zufuehren von gas in eine salzhaltige loesung |
-
1990
- 1990-04-24 IT IT20129A patent/IT1240675B/it active IP Right Grant
-
1991
- 1991-04-16 CA CA002040525A patent/CA2040525C/en not_active Expired - Lifetime
- 1991-04-18 ES ES91200917T patent/ES2047978T3/es not_active Expired - Lifetime
- 1991-04-18 US US07/687,116 patent/US5273623A/en not_active Expired - Lifetime
- 1991-04-18 AT AT91200917T patent/ATE100442T1/de not_active IP Right Cessation
- 1991-04-18 DE DE69101022T patent/DE69101022T2/de not_active Expired - Fee Related
- 1991-04-18 EP EP91200917A patent/EP0454227B1/en not_active Expired - Lifetime
- 1991-04-23 AR AR91319509A patent/AR246921A1/es active
- 1991-04-23 RU SU914895239A patent/RU1833373C/ru active
- 1991-04-23 BG BG94302A patent/BG60583B1/bg unknown
- 1991-04-23 MX MX025486A patent/MX173474B/es unknown
- 1991-04-24 PL PL91290012A patent/PL164999B1/pl unknown
- 1991-04-24 CN CN91103239A patent/CN1043039C/zh not_active Expired - Lifetime
- 1991-05-27 SA SA91110363A patent/SA91110363B1/ar unknown
-
1995
- 1995-08-10 US US08/513,251 patent/US5736003A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
LT3607B (en) | 1990-10-05 | 1995-12-27 | Urea Casale Sa | Process for the production of urea by steps and implementation also on existing plants |
Also Published As
Publication number | Publication date |
---|---|
PL164999B1 (pl) | 1994-10-31 |
BG60583B1 (bg) | 1995-09-29 |
EP0454227A1 (en) | 1991-10-30 |
SA91110363B1 (ar) | 2002-05-18 |
CA2040525A1 (en) | 1991-10-25 |
DE69101022T2 (de) | 1994-05-19 |
ES2047978T3 (es) | 1994-03-01 |
US5736003A (en) | 1998-04-07 |
IT9020129A1 (it) | 1991-10-24 |
IT9020129A0 (it) | 1990-04-24 |
ATE100442T1 (de) | 1994-02-15 |
RU1833373C (ru) | 1993-08-07 |
US5273623A (en) | 1993-12-28 |
DE69101022D1 (de) | 1994-03-03 |
CN1043039C (zh) | 1999-04-21 |
EP0454227B1 (en) | 1994-01-19 |
BG94302A (bg) | 1993-12-24 |
PL290012A1 (en) | 1992-01-13 |
MX173474B (es) | 1994-03-07 |
AR246921A1 (es) | 1994-10-31 |
CA2040525C (en) | 2002-06-04 |
CN1057453A (zh) | 1992-01-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
0001 | Granted | ||
TA | Fee payment date (situation as of event date), data collected since 19931001 |
Effective date: 19970415 |