BG60583B1 - Метод за концентриране на разтвори на карбамид във вакуум - Google Patents
Метод за концентриране на разтвори на карбамид във вакуум Download PDFInfo
- Publication number
- BG60583B1 BG60583B1 BG94302A BG9430291A BG60583B1 BG 60583 B1 BG60583 B1 BG 60583B1 BG 94302 A BG94302 A BG 94302A BG 9430291 A BG9430291 A BG 9430291A BG 60583 B1 BG60583 B1 BG 60583B1
- Authority
- BG
- Bulgaria
- Prior art keywords
- separator
- urea
- water vapor
- vacuum
- gas
- 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)
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 (2)
Publication Number | Publication Date |
---|---|
BG94302A BG94302A (bg) | 1993-12-24 |
BG60583B1 true BG60583B1 (bg) | 1995-09-29 |
Family
ID=11164044
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BG94302A BG60583B1 (bg) | 1990-04-24 | 1991-04-23 | Метод за концентриране на разтвори на карбамид във вакуум |
Country Status (14)
Country | Link |
---|---|
US (2) | US5273623A (es) |
EP (1) | EP0454227B1 (es) |
CN (1) | CN1043039C (es) |
AR (1) | AR246921A1 (es) |
AT (1) | ATE100442T1 (es) |
BG (1) | BG60583B1 (es) |
CA (1) | CA2040525C (es) |
DE (1) | DE69101022T2 (es) |
ES (1) | ES2047978T3 (es) |
IT (1) | IT1240675B (es) |
MX (1) | MX173474B (es) |
PL (1) | PL164999B1 (es) |
RU (1) | RU1833373C (es) |
SA (1) | SA91110363B1 (es) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ATE134994T1 (de) | 1990-10-05 | 1996-03-15 | Urea Casale Sa | Verfahren zur herstellung von harnstoff mit unterschiedlichen leistungen sowie die implementierung in existierenden anlagen |
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 (es) * | 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
Also Published As
Publication number | Publication date |
---|---|
PL164999B1 (pl) | 1994-10-31 |
EP0454227A1 (en) | 1991-10-30 |
IT1240675B (it) | 1993-12-17 |
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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