GB1153107A – Process for the production of Urea
– Google Patents
GB1153107A – Process for the production of Urea
– Google Patents
Process for the production of Urea
Info
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
1966-09-16
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
Application number
GB42015/67A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyo Koatsu Industries Inc
Original Assignee
Toyo Koatsu Industries Inc
Priority date (The priority date 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 date listed.)
1966-09-16
Filing date
1967-09-14
Publication date
1969-05-21
1967-09-14
Application filed by Toyo Koatsu Industries Inc
filed
Critical
Toyo Koatsu Industries Inc
1969-05-21
Publication of GB1153107A
publication
Critical
patent/GB1153107A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
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.
GB42015/67A
1966-09-16
1967-09-14
Process for the production of Urea
Expired
GB1153107A
(en)
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)
* Cited by examiner, † Cited by third party
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
NL
NL676712586A
patent/NL141178B/en
not_active
IP Right Cessation
1967-09-14
GB
GB42015/67A
patent/GB1153107A/en
not_active
Expired
Cited By (8)
* Cited by examiner, † Cited by third party
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
DE1668724C3
(en)
1973-07-19
NL141178B
(en)
1974-02-15
NL6712586A
(en)
1968-03-18
DE1668724A1
(en)
1972-01-05
DE1668724B2
(en)
1973-01-04
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Legal Events
Date
Code
Title
Description
1969-07-30
429A
Application made for amendment of specification (sect. 29/1949)
1969-08-27
429H
Application (made) for amendment of specification now open to opposition (sect. 29/1949)
1969-09-10
414F
Notice of opposition given (sect. 14/1949)
1970-01-14
429D
Case decided by the comptroller ** specification amended (sect. 29/1949)
1970-08-26
414E
Application relinquished (sect. 14/1949)
1971-01-06
CSNS
Application of which complete specification have been accepted and published, but patent is not sealed
