GB1064559A – Process for the preparation of 4,4′-methylenedianiline
– Google Patents
GB1064559A – Process for the preparation of 4,4′-methylenedianiline
– Google Patents
Process for the preparation of 4,4′-methylenedianiline
Info
Publication number
GB1064559A
GB1064559A
GB10185/66A
GB1018566A
GB1064559A
GB 1064559 A
GB1064559 A
GB 1064559A
GB 10185/66 A
GB10185/66 A
GB 10185/66A
GB 1018566 A
GB1018566 A
GB 1018566A
GB 1064559 A
GB1064559 A
GB 1064559A
Authority
GB
United Kingdom
Prior art keywords
aniline
methylenedianiline
mole
per mole
hydrochloric acid
Prior art date
1965-03-08
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
GB10185/66A
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and 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.)
1965-03-08
Filing date
1966-03-08
Publication date
1967-04-05
1966-03-08
Application filed by EI Du Pont de Nemours and Co
filed
Critical
EI Du Pont de Nemours and Co
1967-04-05
Publication of GB1064559A
publication
Critical
patent/GB1064559A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
C—CHEMISTRY; METALLURGY
C07—ORGANIC CHEMISTRY
C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
C07C265/00—Derivatives of isocyanic acid
C07C265/12—Derivatives of isocyanic acid having isocyanate groups bound to carbon atoms of six-membered aromatic rings
Abstract
4,41-Methylenedianiline is prepared by (a) condensing aniline hydrochloride with form aldehyde at a temperature below 50 DEG C.; (b) adding at least 1/5 mole of free aniline per mole of formaldehyde, the amount of aniline added being such that the composition obtained con tains 2-10 moles of aniline per mole of form aldehyde and 0.1 to 0.98 mole of hydrochloric acid per mole of aniline; and heating the result ing composition to a temperature of at least 50 DEG C. The aniline hydrochloride may be made in situ from aniline and hydrochloric acid. The 4,41-methylenedianiline may be recovered from the reaction mixture after neutralizing the mixture with an alkaline material.
GB10185/66A
1965-03-08
1966-03-08
Process for the preparation of 4,4′-methylenedianiline
Expired
GB1064559A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US438072A
US3367969A
(en)
1965-03-08
1965-03-08
Process for the preparation of 4, 4′-methylenedianiline
Publications (1)
Publication Number
Publication Date
GB1064559A
true
GB1064559A
(en)
1967-04-05
Family
ID=23739093
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB10185/66A
Expired
GB1064559A
(en)
1965-03-08
1966-03-08
Process for the preparation of 4,4′-methylenedianiline
Country Status (2)
Country
Link
US
(1)
US3367969A
(en)
GB
(1)
GB1064559A
(en)
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
EP1960346B2
(en)
†
2005-12-08
2019-03-27
Huntsman International Llc
Process for preparing diaminodiphenylmethanes
Families Citing this family (13)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3517062A
(en)
*
1966-08-05
1970-06-23
Mobay Chemical Corp
Process for the preparation of substantially pure 4,4′-diaminodiphenylmethane
US3542871A
(en)
*
1968-07-29
1970-11-24
Upjohn Co
Purification of 4,4′-methylene dianiline by crystallization
US3857890A
(en)
*
1969-07-25
1974-12-31
Upjohn Co
Process for preparing methylene-di-anilines
DE2356828C2
(en)
*
1973-11-14
1982-10-21
Bayer Ag, 5090 Leverkusen
Process for the production of polyamines and their use as starting material for the production of polyisocyanates
DE2648982C2
(en)
*
1975-11-11
1985-07-11
Efim Zürich Biller
Process for the preparation of polyarylamines containing methylene bridges
DE2557501A1
(en)
*
1975-12-19
1977-06-30
Bayer Ag
PROCESS FOR PRODUCING POLYAMINES
DE2557500A1
(en)
*
1975-12-19
1977-06-30
Bayer Ag
PROCESS FOR PRODUCING POLYAMINES
DE2748968A1
(en)
*
1976-11-06
1978-05-11
Elprochine Ag
PROCESS FOR THE PRODUCTION OF METHYLENE BRIDGES POLYARYLAMINES
DE2736862A1
(en)
*
1977-08-16
1979-03-01
Bayer Ag
PROCESS FOR PRODUCING POLYAMINES OF THE DIPHENYLMETHANE SERIES
DE3407494A1
(en)
*
1984-03-01
1985-09-05
Bayer Ag, 5090 Leverkusen
METHOD FOR PRODUCING POLYAMINES AND THE USE THEREOF FOR PRODUCING POLYISOCYANATES
CH660879A5
(en)
*
1984-10-30
1987-05-29
Ciba Geigy Ag
ONE-STEP PROCESS FOR THE PRODUCTION OF BIS-(AMINO-NITROPHENYL)-METHANE.
JP4973832B2
(en)
*
2005-11-29
2012-07-11
日本ポリウレタン工業株式会社
Continuous production method of polymethylene polyphenyl polyamine
EP2014641A3
(en)
*
2007-06-06
2009-03-18
Huntsman International Llc
Process for preparing mixtures of diphenylmethane diisocyanates and polyphenyl polymethylene polyisocyanates
Family Cites Families (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US2818433A
(en)
*
1955-09-19
1957-12-31
Monsanto Chemicals
Process for making methylenedianilines
BE639351A
(en)
*
1963-06-13
US3260750A
(en)
*
1963-10-14
1966-07-12
Upjohn Co
Process for preparing hydrazobenzenes
1965
1965-03-08
US
US438072A
patent/US3367969A/en
not_active
Expired – Lifetime
1966
1966-03-08
GB
GB10185/66A
patent/GB1064559A/en
not_active
Expired
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
EP1960346B2
(en)
†
2005-12-08
2019-03-27
Huntsman International Llc
Process for preparing diaminodiphenylmethanes
Also Published As
Publication number
Publication date
US3367969A
(en)
1968-02-06
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