GB1153107A - Process for the production of Urea - Google Patents
Process for the production of UreaInfo
- Publication number
- GB1153107A GB1153107A GB42015/67A GB4201567A GB1153107A GB 1153107 A GB1153107 A GB 1153107A GB 42015/67 A GB42015/67 A GB 42015/67A GB 4201567 A GB4201567 A GB 4201567A GB 1153107 A GB1153107 A GB 1153107A
- Authority
- GB
- United Kingdom
- Prior art keywords
- urea
- carbon dioxide
- weight
- synthesis step
- ammonium carbamate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- 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
- C07C273/04—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 from carbon dioxide and ammonia
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/02—Apparatus characterised by being constructed of material selected for its chemically-resistant properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/02—Apparatus characterised by their chemically-resistant properties
- B01J2219/0204—Apparatus characterised by their chemically-resistant properties comprising coatings on the surfaces in direct contact with the reactive components
- B01J2219/0236—Metal based
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/02—Apparatus characterised by their chemically-resistant properties
- B01J2219/025—Apparatus characterised by their chemically-resistant properties characterised by the construction materials of the reactor vessel proper
- B01J2219/0277—Metal based
- B01J2219/0281—Metal oxides
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/141—Feedstock
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
1,153,107. Urea. TOYO KOATSU INDUSTRIES Inc. 14 Sept., 1967 [16 Sept., 1966], No. 42015/67. Heading C2C. [Also in Division C7] A process for the production of urea comprises a urea-synthesis step of reacting ammonia and carbon dioxide at urea-forming temperatures and pressures, treating the resulting ureasynthesis effluent in such a manner that the unreacted ammonium carbamate contained in said effluent is distilled off as a gaseous mixture of ammonia and carbon dioxide to obtain urea, wherein there is used for performing the process an apparatus which is so constructed that one or more surfaces thereof coming into contact with ammonium carbamate is or are of an alloy steel resistant to corrosion by ammonium carbamate, the said alloy steel containing at least 20% by weight of chromium, 1 to 7% by weight of nickel and 1 to 4% by weight of molybdenum, the balance being iron and unavoidable impurity. The said alloy may also contain manganese, silicon, tungsten, phosphorus, sulphur or nitrogen, and the urea-synthesis step is preferably conducted in the presence of less than 0À2% by volume of oxygen based on the amount of carbon dioxide used for the synthesis. At least a part of the said gaseous mixture is preferably absorbed in an absorbent and recirculated as an aqueous carbamate solution to the urea-synthesis step.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6084466 | 1966-09-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1153107A true GB1153107A (en) | 1969-05-21 |
Family
ID=13154065
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB42015/67A Expired GB1153107A (en) | 1966-09-16 | 1967-09-14 | Process for the production of Urea |
Country Status (4)
Country | Link |
---|---|
DE (1) | DE1668724C3 (en) |
ES (1) | ES344834A1 (en) |
GB (1) | GB1153107A (en) |
NL (1) | NL141178B (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2138024A (en) * | 1983-02-15 | 1984-10-17 | Jgc Corp | Corrosion resistant castable stainless steel alloy composition for use at low temperatures |
US4591644A (en) * | 1983-12-21 | 1986-05-27 | Stamicarbon B.V. | Method and installation for the preparation of melamine |
WO1995025098A1 (en) * | 1994-03-15 | 1995-09-21 | Dsm N.V. | Method for the separation of impurities from a hot synthesis gas mixture in the preparation of melamine |
EP1921043A1 (en) * | 2006-11-01 | 2008-05-14 | Mitsubishi Gas Chemical Company, Inc. | Method of recovering ammonia |
US9890114B2 (en) | 2013-05-28 | 2018-02-13 | Toyo Engineering Corporation | Urea synthesis method |
-
1967
- 1967-09-07 ES ES344834A patent/ES344834A1/en not_active Expired
- 1967-09-13 DE DE19671668724 patent/DE1668724C3/en not_active Expired
- 1967-09-14 GB GB42015/67A patent/GB1153107A/en not_active Expired
- 1967-09-14 NL NL676712586A patent/NL141178B/en not_active IP Right Cessation
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2138024A (en) * | 1983-02-15 | 1984-10-17 | Jgc Corp | Corrosion resistant castable stainless steel alloy composition for use at low temperatures |
US4591644A (en) * | 1983-12-21 | 1986-05-27 | Stamicarbon B.V. | Method and installation for the preparation of melamine |
WO1995025098A1 (en) * | 1994-03-15 | 1995-09-21 | Dsm N.V. | Method for the separation of impurities from a hot synthesis gas mixture in the preparation of melamine |
US5716429A (en) * | 1994-03-15 | 1998-02-10 | Dsm N.V. | Method for the separation of impurities from a hot synthesis gas mixture in the preparation of melamine |
CN1061979C (en) * | 1994-03-15 | 2001-02-14 | Dsm有限公司 | Method for separation of impurities from hot synthesis gas mixture in preparation of melamine |
EP1921043A1 (en) * | 2006-11-01 | 2008-05-14 | Mitsubishi Gas Chemical Company, Inc. | Method of recovering ammonia |
US7785556B2 (en) | 2006-11-01 | 2010-08-31 | Mitsubishi Gas Chemical Company, Inc. | Method of recovering ammonia |
US9890114B2 (en) | 2013-05-28 | 2018-02-13 | Toyo Engineering Corporation | Urea synthesis method |
Also Published As
Publication number | Publication date |
---|---|
ES344834A1 (en) | 1968-11-01 |
NL141178B (en) | 1974-02-15 |
DE1668724C3 (en) | 1973-07-19 |
DE1668724A1 (en) | 1972-01-05 |
NL6712586A (en) | 1968-03-18 |
DE1668724B2 (en) | 1973-01-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
429A | Application made for amendment of specification (sect. 29/1949) | ||
429H | Application (made) for amendment of specification now open to opposition (sect. 29/1949) | ||
414F | Notice of opposition given (sect. 14/1949) | ||
429D | Case decided by the comptroller ** specification amended (sect. 29/1949) | ||
414E | Application relinquished (sect. 14/1949) | ||
CSNS | Application of which complete specification have been accepted and published, but patent is not sealed |