GB1439808A – Process for the recovery of guanidine carbonate from aqueous solution
– Google Patents
GB1439808A – Process for the recovery of guanidine carbonate from aqueous solution
– Google Patents
Process for the recovery of guanidine carbonate from aqueous solution
Info
Publication number
GB1439808A
GB1439808A
GB2941273A
GB2941273A
GB1439808A
GB 1439808 A
GB1439808 A
GB 1439808A
GB 2941273 A
GB2941273 A
GB 2941273A
GB 2941273 A
GB2941273 A
GB 2941273A
GB 1439808 A
GB1439808 A
GB 1439808A
Authority
GB
United Kingdom
Prior art keywords
urea
guanidine carbonate
melamine
solution
ammonia
Prior art date
1972-07-14
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
GB2941273A
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.)
Patheon Austria GmbH and Co KG
Original Assignee
Chemie Linz AG
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.)
1972-07-14
Filing date
1973-06-20
Publication date
1976-06-16
1973-06-20
Application filed by Chemie Linz AG
filed
Critical
Chemie Linz AG
1976-06-16
Publication of GB1439808A
publication
Critical
patent/GB1439808A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
C—CHEMISTRY; METALLURGY
C07—ORGANIC CHEMISTRY
C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
C07C277/00—Preparation of guanidine or its derivatives, i.e. compounds containing the group, the singly-bound nitrogen atoms not being part of nitro or nitroso groups
C—CHEMISTRY; METALLURGY
C07—ORGANIC CHEMISTRY
C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
C07C279/00—Derivatives of guanidine, i.e. compounds containing the group, the singly-bound nitrogen atoms not being part of nitro or nitroso groups
C07C279/20—Derivatives of guanidine, i.e. compounds containing the group, the singly-bound nitrogen atoms not being part of nitro or nitroso groups containing any of the groups, X being a hetero atom, Y being any atom, e.g. acylguanidines
Abstract
1439808 Guanidine carbonate; melamine CHEMIE LINZ AG 20 June 1973 [14 July 1972] 29412/73 Heading C2C Guanidine carbonate is obtained from an aqueous solution in which it is present in addition to urea, pyrolysis products of urea, ammonia and carbon dioxide by heating the solution at #80 C. and at atmospheric pressure (to expel the NH 3 and free C0 2 present) evaporating the resulting solution (which contains an amount of CO 2 equivalent to the guanidine content) at # 80 C. and #0À80 atmosphere absolute pressure until the solution after cooling to 20-30 C. is saturated with urea, separating the resulting solid precipitate (mainly melamine) and then suspending the mother liquor which remains in an amount of liquid ammonia which is at least twice (e.g. 2 to 4 times) the weight of urea present, the water content of the suspension not exceeding 20% by weight, and then separating off the guanidine carbonate which remains undissolved. A further evaporation may be effected on the solution immediately prior to the suspension in liquid ammonia also at #0À80 atmosphere absolute and #80 C. provided that, if the water content of the final concentrate is between 0 and 10% by weight, then the evaporation is carried out within 5 seconds, e.g. by spray drying. The treatment with liquid ammonia is generally effected at – 33 to + 20 C. and at 1 to 10 atmospheres absolute pressure. The examples describe the recovery of guanidine carbonate and melamine from mother liquors obtained in the manufacture of melamine from urea or cyanic acid and ammonia.
GB2941273A
1972-07-14
1973-06-20
Process for the recovery of guanidine carbonate from aqueous solution
Expired
GB1439808A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
DE2234732A
DE2234732C2
(en)
1972-07-14
1972-07-14
Process for the production of guanidine
Publications (1)
Publication Number
Publication Date
GB1439808A
true
GB1439808A
(en)
1976-06-16
Family
ID=5850684
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB2941273A
Expired
GB1439808A
(en)
1972-07-14
1973-06-20
Process for the recovery of guanidine carbonate from aqueous solution
Country Status (16)
Country
Link
US
(1)
US3952057A
(en)
JP
(1)
JPS516651B2
(en)
BE
(1)
BE802357A
(en)
BG
(1)
BG20574A3
(en)
CA
(1)
CA977774A
(en)
CH
(1)
CH581098A5
(en)
CS
(1)
CS161072B2
(en)
DD
(1)
DD107444A1
(en)
DE
(1)
DE2234732C2
(en)
FR
(1)
FR2193009B1
(en)
GB
(1)
GB1439808A
(en)
IT
(1)
IT991712B
(en)
NL
(1)
NL176258C
(en)
RO
(1)
RO61199A
(en)
SE
(1)
SE402453B
(en)
SU
(1)
SU468404A3
(en)
Families Citing this family (7)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
DE2435167C3
(en)
*
1974-07-22
1979-02-15
Lentia Gmbh
Process for the production of guanidine carbonate from dilute, aqueous solutions
JPS585904B2
(en)
*
1977-04-05
1983-02-02
三井東圧化学株式会社
Method for producing guanidine and its salts
JPS5912789U
(en)
*
1982-07-19
1984-01-26
株式会社昭和製作所
Inner tube guide member of piston type front fork of motorcycle
DE4405546A1
(en)
*
1994-02-22
1995-08-24
Nigu Chemie Gmbh
Process for the recovery of guanidine salts
US20050029194A1
(en)
*
2003-08-07
2005-02-10
Hall David Bruce
Method for removal of guanidine compound from aqueous media
EP3626706B1
(en)
*
2018-09-20
2021-06-02
Borealis Agrolinz Melamine GmbH
Method for increasing the guanidine carbonate yield in a combined melamine process and guanidine carbonate treatment process
EP3750872B1
(en)
*
2019-06-14
2023-06-07
Borealis Agrolinz Melamine GmbH
Increase of guanidine carbonate yield by reduction of mother liquor disposal and quality improvement due to increase of temperature spread
Family Cites Families (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US2224253A
(en)
*
1939-03-20
1940-12-10
Frank H Clark
Dress shield supporter
FR1167461A
(en)
*
1953-07-11
1958-11-25
Bergwerksverband Gmbh
Process for obtaining guanidine carbonate
US2826613A
(en)
*
1953-07-11
1958-03-11
Grosskinsky Otto
Recovery of solid guanidine carbonate
1972
1972-07-14
DE
DE2234732A
patent/DE2234732C2/en
not_active
Expired
1973
1973-05-29
CH
CH772173A
patent/CH581098A5/xx
not_active
IP Right Cessation
1973-05-31
CS
CS3957A
patent/CS161072B2/cs
unknown
1973-06-06
BG
BG23810A
patent/BG20574A3/xx
unknown
1973-06-20
GB
GB2941273A
patent/GB1439808A/en
not_active
Expired
1973-06-21
FR
FR7322659A
patent/FR2193009B1/fr
not_active
Expired
1973-07-03
US
US05/376,176
patent/US3952057A/en
not_active
Expired – Lifetime
1973-07-04
CA
CA175,632A
patent/CA977774A/en
not_active
Expired
1973-07-09
NL
NLAANVRAGE7309556,A
patent/NL176258C/en
not_active
IP Right Cessation
1973-07-10
IT
IT69062/73A
patent/IT991712B/en
active
1973-07-11
SE
SE7309732A
patent/SE402453B/en
unknown
1973-07-12
DD
DD172251A
patent/DD107444A1/xx
unknown
1973-07-12
JP
JP48077964A
patent/JPS516651B2/ja
not_active
Expired
1973-07-13
SU
SU1949194A
patent/SU468404A3/en
active
1973-07-13
BE
BE133497A
patent/BE802357A/en
not_active
IP Right Cessation
1973-07-14
RO
RO75471A
patent/RO61199A/ro
unknown
Also Published As
Publication number
Publication date
NL176258C
(en)
1985-03-18
CS161072B2
(en)
1975-05-04
JPS4951225A
(en)
1974-05-18
SU468404A3
(en)
1975-04-25
JPS516651B2
(en)
1976-03-01
US3952057A
(en)
1976-04-20
SE402453B
(en)
1978-07-03
CA977774A
(en)
1975-11-11
FR2193009B1
(en)
1977-02-18
FR2193009A1
(en)
1974-02-15
NL7309556A
(en)
1974-01-16
IT991712B
(en)
1975-08-30
CH581098A5
(en)
1976-10-29
BE802357A
(en)
1974-01-14
DD107444A1
(en)
1974-08-05
DE2234732C2
(en)
1983-05-05
BG20574A3
(en)
1975-12-05
DE2234732A1
(en)
1974-01-31
NL176258B
(en)
1984-10-16
RO61199A
(en)
1976-11-15
Similar Documents
Publication
Publication Date
Title
GB1439808A
(en)
1976-06-16
Process for the recovery of guanidine carbonate from aqueous solution
GB906120A
(en)
1962-09-19
Improvements relating to concentrated urea-formaldehyde solutions
GB1247951A
(en)
1971-09-29
Process for preparing melamine from urea
GB1353653A
(en)
1974-05-22
Urea synthesis
IE35308L
(en)
1971-10-02
Urea production
GB975307A
(en)
1964-11-11
Process for improving the fastness properties of dyeings
GB1457226A
(en)
1976-12-01
Recovery of guanidine carbonate from aqueous solution
GB1318999A
(en)
1973-05-31
Production of 4-ureideohexahydropyrimidin-2-one
GB1280855A
(en)
1972-07-05
Process for the recovery of metallic catalysts
GB1198782A
(en)
1970-07-15
A Process for the Production of Azo-Diisobutyric Acid Amidine
GB1279527A
(en)
1972-06-28
Continuous preparation of cyclohexanone oxime
GB1212661A
(en)
1970-11-18
Process for the production of granular urea
GB1041408A
(en)
1966-09-07
Improvements in or relating to the production of sodium bicarbonate
GB1421073A
(en)
1976-01-14
Stabilising methionine
GB1334871A
(en)
1973-10-24
Urea crystals pellets prills and the like
GB950165A
(en)
1964-02-19
A method of producing nordstrandite
GB1367518A
(en)
1974-09-18
Recovery of reaction products of hydrazine and carbonyl compounds
GB1195611A
(en)
1970-06-17
Improvements in and relating to the Production of Concentrated Urea-Formaldehyde Solutions
GB1268655A
(en)
1972-03-29
Discontinuous production of alkali metal salts of nitrilotriacetic acid
GB1269688A
(en)
1972-04-06
Improvements in or relating to the production of urea
GB1269873A
(en)
1972-04-06
Process for producing ferrous sulphate
ES279034A1
(en)
1963-01-16
Process for the preparation of ammonium chloride from the liquor of an ammonia-soda process
GB1239364A
(en)
1971-07-14
GB815317A
(en)
1959-06-24
Improvements in or relating to the production of feed for ruminant animals
ES422849A1
(en)
1976-04-16
Partial dehydration of cyclohexanone oxime
Legal Events
Date
Code
Title
Description
1976-10-27
PS
Patent sealed [section 19, patents act 1949]
1993-07-21
PE20
Patent expired after termination of 20 years
Effective date:
19930619
