GB1149301A – Process of synthesizing melamine
– Google Patents
GB1149301A – Process of synthesizing melamine
– Google Patents
Process of synthesizing melamine
Info
Publication number
GB1149301A
GB1149301A
GB2330/67A
GB233067A
GB1149301A
GB 1149301 A
GB1149301 A
GB 1149301A
GB 2330/67 A
GB2330/67 A
GB 2330/67A
GB 233067 A
GB233067 A
GB 233067A
GB 1149301 A
GB1149301 A
GB 1149301A
Authority
GB
United Kingdom
Prior art keywords
melamine
suitably
gas
temperature
acid content
Prior art date
1966-02-10
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
GB2330/67A
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.)
Chemical Construction Corp
Original Assignee
Chemical Construction Corp
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.)
1966-02-10
Filing date
1967-01-16
Publication date
1969-04-23
1967-01-16
Application filed by Chemical Construction Corp
filed
Critical
Chemical Construction Corp
1969-04-23
Publication of GB1149301A
publication
Critical
patent/GB1149301A/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
B—PERFORMING OPERATIONS; TRANSPORTING
B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
Abstract
1,149,301. Production of melamine. CHEMICAL CONSTRUCTION CORP. 16 Jan., 1967 [10 Feb., 1966], No. 2330/67. Heading C2C. A process for synthesizing melamine from urea comprises heating the urea in the presence of a catalyst at a temperature greater than 320 C. and, after the catalytic reaction, adding a small proportion of water vapour to the aqueous mixture from the synthesis prior to cooling from the temperature above 320 C. to condense the melamine, the minimum amount of water vapour added being in the molar ratio of at least 1: 1 relative to the cyanic acid content of the gas. The water, which is preferably added as a spray, is suitably employed in an amount of from 1: 1 to 8: 1 molar relative to the cyanic acid content of the gas and the gas itself is suitably at a temperature of 340-425 C. The cooling step may be effected by employing an aqueous quench which is suitably the liquor obtained by separation from a slurry formed by the condensation of melamine in the liquor. An apparatus is described in which the above process may be carried out.
GB2330/67A
1966-02-10
1967-01-16
Process of synthesizing melamine
Expired
GB1149301A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US526491A
US3386999A
(en)
1966-02-10
1966-02-10
Synthesis of melamine
Publications (1)
Publication Number
Publication Date
GB1149301A
true
GB1149301A
(en)
1969-04-23
Family
ID=24097577
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB2330/67A
Expired
GB1149301A
(en)
1966-02-10
1967-01-16
Process of synthesizing melamine
Country Status (5)
Country
Link
US
(1)
US3386999A
(en)
BE
(1)
BE693668A
(en)
DE
(1)
DE1670422A1
(en)
GB
(1)
GB1149301A
(en)
NL
(1)
NL6701353A
(en)
Cited By (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
DE4211763A1
(en)
*
1992-04-08
1993-10-14
Chemie Linz Deutschland
Appts. for sepg. melamine from hot reaction gases – using coaxial absorption tube with its interior coated with washing liq. with prevented deposition of melamine in appts.
US5344473A
(en)
*
1992-03-30
1994-09-06
Chemie Linz Gesellschaft M.B.H.
Apparatus for the deposition of melamine
Families Citing this family (11)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
DE1670126A1
(en)
*
1966-08-09
1970-10-29
Basf Ag
Process for cooling the exhaust gases obtained during melamine synthesis
DE1695567A1
(en)
*
1966-08-16
1971-05-06
Nissan Chemical Ind Ltd
Process for the production of high quality melamine
US4138560A
(en)
*
1975-06-10
1979-02-06
Basf Aktiengesellschaft
Process for cooling melamine synthesis waste gases
DE3041324A1
(en)
*
1980-11-03
1982-06-16
Basf Ag, 6700 Ludwigshafen
METHOD FOR THE SIMULTANEOUS DEGRADATION OF TRACE COMPONENTS IN THE REACTION EXHAUST GASES OF THE MELAMINE SYNTHESIS
US4565867A
(en)
*
1984-01-05
1986-01-21
Melamine Chemicals, Inc.
Anhydrous high-pressure melamine synthesis
NL9002606A
(en)
*
1990-11-29
1992-06-16
Stamicarbon
PROCESS FOR THE PREPARATION OF MELAMINE FROM UREA.
GB2337259B
(en)
*
1998-05-12
2000-03-29
Dsm Nv
Method for preparing melamine
US6303781B1
(en)
1998-05-12
2001-10-16
Dsm N.V.
Method for preparing melamine
AU767818B2
(en)
*
1998-11-13
2003-11-27
Agrolinz Melamin Gmbh
Method for producing pure melamine
US7311759B2
(en)
*
2001-11-16
2007-12-25
Ami – Agrolinz Melamine International Gmbh
Process for purifying off-gases of a melamine plant
DE102005023042B4
(en)
*
2005-05-06
2007-10-31
Lurgi Ag
Process for the preparation of melamine
Family Cites Families (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US2566225A
(en)
*
1951-08-28
Process for preparing substituted
US3310558A
(en)
*
1967-03-21
Melamine recovery
US2566231A
(en)
*
1943-07-17
1951-08-28
Preparation of melamine
1966
1966-02-10
US
US526491A
patent/US3386999A/en
not_active
Expired – Lifetime
1967
1967-01-16
GB
GB2330/67A
patent/GB1149301A/en
not_active
Expired
1967-01-19
DE
DE19671670422
patent/DE1670422A1/en
active
Pending
1967-01-27
NL
NL6701353A
patent/NL6701353A/xx
unknown
1967-02-03
BE
BE693668D
patent/BE693668A/xx
unknown
Cited By (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US5344473A
(en)
*
1992-03-30
1994-09-06
Chemie Linz Gesellschaft M.B.H.
Apparatus for the deposition of melamine
DE4211763A1
(en)
*
1992-04-08
1993-10-14
Chemie Linz Deutschland
Appts. for sepg. melamine from hot reaction gases – using coaxial absorption tube with its interior coated with washing liq. with prevented deposition of melamine in appts.
Also Published As
Publication number
Publication date
NL6701353A
(en)
1967-08-11
US3386999A
(en)
1968-06-04
DE1670422A1
(en)
1971-02-11
BE693668A
(en)
1967-08-03
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