GB1104398A – Production of melamine
– Google Patents
GB1104398A – Production of melamine
– Google Patents
Production of melamine
Info
Publication number
GB1104398A
GB1104398A
GB36044/66A
GB3604466A
GB1104398A
GB 1104398 A
GB1104398 A
GB 1104398A
GB 36044/66 A
GB36044/66 A
GB 36044/66A
GB 3604466 A
GB3604466 A
GB 3604466A
GB 1104398 A
GB1104398 A
GB 1104398A
Authority
GB
United Kingdom
Prior art keywords
zone
melamine
urea
catalytic reaction
reaction mass
Prior art date
1965-09-14
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
GB36044/66A
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.)
Wyeth Holdings LLC
Original Assignee
American Cyanamid Co
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.)
1965-09-14
Filing date
1966-08-11
Publication date
1968-02-28
1966-08-11
Application filed by American Cyanamid Co
filed
Critical
American Cyanamid Co
1968-02-28
Publication of GB1104398A
publication
Critical
patent/GB1104398A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
C—CHEMISTRY; METALLURGY
C07—ORGANIC CHEMISTRY
C07D—HETEROCYCLIC COMPOUNDS
C07D251/00—Heterocyclic compounds containing 1,3,5-triazine rings
C07D251/02—Heterocyclic compounds containing 1,3,5-triazine rings not condensed with other rings
C07D251/12—Heterocyclic compounds containing 1,3,5-triazine rings not condensed with other rings having three double bonds between ring members or between ring members and non-ring members
C07D251/26—Heterocyclic compounds containing 1,3,5-triazine rings not condensed with other rings having three double bonds between ring members or between ring members and non-ring members with only hetero atoms directly attached to ring carbon atoms
C07D251/40—Nitrogen atoms
C07D251/54—Three nitrogen atoms
C07D251/56—Preparation of melamine
C07D251/60—Preparation of melamine from urea or from carbon dioxide and ammonia
Abstract
Melamine is obtained by (i) reactively contacting liquid or solid urea and/or its decomposition products in liquid or solid form, in a first zone at substantially atmospheric pressure and 130-275 DEG C. with a catalyst effective for decomposition of urea to melamine and melamine intermediates, and (ii) transporting the resulting catalytic reaction mass to a second zone and reacting therein at a temperature of 325-450 DEG C. The catalyst employed may be a porous material, e.g. silica gel, silica-alumina gel, alumina gel and activated alumina, and a dry inert gas, e.g. ammonia, carbon dioxide and nitrogen-ammonia mixtures, is preferably employed to transport the catalytic reaction mass to the second zone and to strip the catalytic reaction mass after reaction in said zone after which the mass may be recycled to the first zone. The process may be effected batchwise or continuously and urea decomposition products which are melamine intermediates may also be employed as starting materials.
GB36044/66A
1965-09-14
1966-08-11
Production of melamine
Expired
GB1104398A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US487137A
US3332947A
(en)
1965-09-14
1965-09-14
Production of melamine
Publications (1)
Publication Number
Publication Date
GB1104398A
true
GB1104398A
(en)
1968-02-28
Family
ID=23934557
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB36044/66A
Expired
GB1104398A
(en)
1965-09-14
1966-08-11
Production of melamine
Country Status (10)
Country
Link
US
(1)
US3332947A
(en)
AT
(1)
AT278832B
(en)
BE
(1)
BE686478A
(en)
CH
(1)
CH471801A
(en)
DE
(1)
DE1645931A1
(en)
ES
(1)
ES331003A1
(en)
GB
(1)
GB1104398A
(en)
NL
(1)
NL6612363A
(en)
NO
(1)
NO118668B
(en)
SE
(1)
SE326187B
(en)
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
CN102584729A
(en)
*
2010-12-15
2012-07-18
欧洲技术设于伊特根的三聚氰氨-卢森堡-分支机构
Use of urea containing formaldehyde in a process for the production of melamine by the pyrolysis of urea and related process for the production of melamine
Families Citing this family (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
RO74590A
(en)
*
1977-01-19
1981-08-30
Stamicarbon Bv,Nl
PROCEDURE FOR PREPARING MELAMINE FROM URINE
CN114835653A
(en)
*
2022-04-14
2022-08-02
德阳路仪科技有限公司
Production process and device of closed-loop energy-saving melamine co-produced with urea
CN115181070A
(en)
*
2022-08-10
2022-10-14
宁波中科远东催化工程技术有限公司
Method for producing melamine
Family Cites Families (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3300483A
(en)
*
1961-12-01
1967-01-24
Merck & Co Inc
4, 6-pregnadieno-[3, 2-c] pyrazoles and processes of preparing them
DE1209570B
(en)
*
1964-03-28
1966-01-27
Basf Ag
Process for the production of melamine
1965
1965-09-14
US
US487137A
patent/US3332947A/en
not_active
Expired – Lifetime
1966
1966-08-11
GB
GB36044/66A
patent/GB1104398A/en
not_active
Expired
1966-08-12
NO
NO164298A
patent/NO118668B/no
unknown
1966-09-01
NL
NL6612363A
patent/NL6612363A/xx
unknown
1966-09-06
BE
BE686478D
patent/BE686478A/xx
unknown
1966-09-08
ES
ES0331003A
patent/ES331003A1/en
not_active
Expired
1966-09-12
DE
DE19661645931
patent/DE1645931A1/en
active
Pending
1966-09-13
AT
AT865166A
patent/AT278832B/en
not_active
IP Right Cessation
1966-09-14
SE
SE12357/66A
patent/SE326187B/xx
unknown
1966-09-14
CH
CH1326466A
patent/CH471801A/en
unknown
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
CN102584729A
(en)
*
2010-12-15
2012-07-18
欧洲技术设于伊特根的三聚氰氨-卢森堡-分支机构
Use of urea containing formaldehyde in a process for the production of melamine by the pyrolysis of urea and related process for the production of melamine
Also Published As
Publication number
Publication date
ES331003A1
(en)
1967-11-16
BE686478A
(en)
1967-03-06
NO118668B
(en)
1970-01-26
AT278832B
(en)
1970-02-10
DE1645931A1
(en)
1970-07-16
NL6612363A
(en)
1967-03-15
CH471801A
(en)
1969-04-30
SE326187B
(en)
1970-07-20
US3332947A
(en)
1967-07-25
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None