ES482987A1 - Un procedimiento para la preparacion de dicarbamatos de di- fenilmetano y carbamatos de polimetilenpolifenilo - Google Patents

Un procedimiento para la preparacion de dicarbamatos de di- fenilmetano y carbamatos de polimetilenpolifenilo

Info

Publication number
ES482987A1
ES482987A1 ES482987A ES482987A ES482987A1 ES 482987 A1 ES482987 A1 ES 482987A1 ES 482987 A ES482987 A ES 482987A ES 482987 A ES482987 A ES 482987A ES 482987 A1 ES482987 A1 ES 482987A1
Authority
ES
Spain
Prior art keywords
polymethylene polyphenyl
preparation
diphenylmethane dicarbamates
formaldehyde
dicarbamates
Prior art date
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
ES482987A
Other languages
English (en)
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.)
Atlantic Richfield Co
Original Assignee
Atlantic Richfield 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.)
Filing date
Publication date
Application filed by Atlantic Richfield Co filed Critical Atlantic Richfield Co
Publication of ES482987A1 publication Critical patent/ES482987A1/es
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C271/00—Derivatives of carbamic acids, i.e. compounds containing any of the groups, the nitrogen atom not being part of nitro or nitroso groups
    • C07C271/06—Esters of carbamic acids

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Un procedimiento para la preparación de dicarbamatos de difenilmetano y carbamatos de polimetilenpolifenilo, caracterizado por hacer reaccionar un éster N-arílico de ácido carbámico con un compuesto carbonílico, seleccionado de formaldehído, paraformaldehído o trioxano, o mezclas de los mismos, a una temperatura comprendida entre la del ambiente y aproximadamente 170ºC, en presencia de un medio de ácido sulfónico catalizador, seleccionado de ácidos alcanosulfónicos, ácidos alcanosulfónicos halogenados o ácidos sulfónicos aromáticos, que tienen una concentración de ácido de por lo menos 75 por ciento, y recuperar los carbamatos deseados.
ES482987A 1978-10-20 1979-07-30 Un procedimiento para la preparacion de dicarbamatos de di- fenilmetano y carbamatos de polimetilenpolifenilo Expired ES482987A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/953,135 US4162362A (en) 1978-10-20 1978-10-20 Process for the preparation of diphenylmethane dicarbamates and polymethylene polyphenyl carbamates

Publications (1)

Publication Number Publication Date
ES482987A1 true ES482987A1 (es) 1980-04-16

Family

ID=25493621

Family Applications (1)

Application Number Title Priority Date Filing Date
ES482987A Expired ES482987A1 (es) 1978-10-20 1979-07-30 Un procedimiento para la preparacion de dicarbamatos de di- fenilmetano y carbamatos de polimetilenpolifenilo

Country Status (16)

Country Link
US (1) US4162362A (es)
JP (1) JPS5557550A (es)
AU (1) AU4768679A (es)
BE (1) BE879534A (es)
BR (1) BR7904877A (es)
CA (1) CA1116177A (es)
DE (1) DE2931473A1 (es)
ES (1) ES482987A1 (es)
FR (1) FR2439183A1 (es)
GB (1) GB2034691B (es)
IT (1) IT1119798B (es)
NL (1) NL7903674A (es)
NO (1) NO793255L (es)
PL (1) PL117371B1 (es)
SE (1) SE7908699L (es)
YU (1) YU155879A (es)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5579358A (en) * 1978-12-13 1980-06-14 Mitsui Toatsu Chem Inc Preparation of polyethylene polyphenyl carbamate
US4202986A (en) * 1979-02-12 1980-05-13 Atlantic Richfield Company Preparation of diphenylmethane dicarbamates and polymethylene polyphenyl carbamates with Lewis acid catalysts intercalated in graphite
US4230877A (en) * 1979-03-22 1980-10-28 Atlantic Richfield Company Method for increasing the 4,4'dicarbamate isomer of the diphenylmethane dicarbamates during preparation thereof
JPS5612357A (en) * 1979-07-09 1981-02-06 Mitsui Toatsu Chem Inc Production of polymethylenepolyphenylpolycarbamate
DE2931554A1 (de) * 1979-08-03 1981-02-26 Basf Ag Verfahren zur herstellung von methylen-bis-phenyl-carbaminsaeureestern und polymethylen-polyphenylcarbaminsaeureestern
CA1150293A (en) * 1979-10-01 1983-07-19 Keisuke Wada Process for the production of methylenedicarbanilates
JPS5679658A (en) * 1979-12-05 1981-06-30 Mitsui Toatsu Chem Inc Novel polyisocyanate composition
DE3013907A1 (de) * 1980-04-11 1981-10-22 Basf Ag, 6700 Ludwigshafen Verfahren zur herstellung von methylen-bis-phenylcarbaminsaeureestern und polymethylen-polyphenylcarbamidsaeureestern
JPS56156252A (en) * 1980-05-02 1981-12-02 Mitsubishi Chem Ind Ltd Preparation of methylene dicarbanilates
JPS56167655A (en) * 1980-05-28 1981-12-23 Mitsubishi Chem Ind Ltd Preparation of methylenedicarbanilate
DE3020784A1 (de) * 1980-05-31 1981-12-10 Basf Ag, 6700 Ludwigshafen Aralkylanilinderivate und herbizide, die diese verbindungen enthalten
US4290968A (en) * 1980-07-23 1981-09-22 Atlantic Richfield Company Preparation of polyisocyanates from polycarbamates
US4369141A (en) * 1980-08-25 1983-01-18 Atlantic Richfield Company Process to improve isocyanate yield upon pyrolysis of a polyfunctional urethane which has been extracted with a combination of hydrochloric acid and alcohol
US4292254A (en) * 1980-10-17 1981-09-29 Atlantic Richfield Company Preparation of polyisocyanates from polycarbamates
US4303794A (en) * 1980-12-22 1981-12-01 The Dow Chemical Company Separation and recovery of 4,4'-methylene dimethyl diphenyldicarbamate
US4543419A (en) * 1981-02-25 1985-09-24 Atlantic Richfield Company Process for the preparation of diphenylmethane dicarbamates and polymethylene polyphenyl carbamates
US4318861A (en) * 1981-03-18 1982-03-09 Atlantic Richfield Company Stabilized diphenylmethane diisocyanate-polymethylene polyphenyl isocyanate compositions
US4320069A (en) * 1981-03-20 1982-03-16 Atlantic Richfield Company Oxazoline stabilized diphenylmethane diisocyanate-polymethylene polyphenyl isocyanate compositions
US4332741A (en) * 1981-03-23 1982-06-01 Atlantic Richfield Company Dichloroparabanic acid stabilized diphenylmethane diisocyanate-polymethylene polyphenyl isocyanate compositions
HU188157B (en) * 1981-11-10 1986-03-28 Chinoin Gyogyszer Es Vegyeszeti Termekek Gyara,Hu Process for producing 1,1-dichloro-4-methyl-1,3-pentadiene
JPH02111065U (es) * 1989-02-22 1990-09-05
DE69224495T2 (de) * 1991-06-26 1998-08-13 Lucky Ltd Verfahren zur selektiven Herstellung von 4,4-Methylen-bis-(N-phenylalkylcarbamate)
US5206412A (en) * 1992-02-07 1993-04-27 Arco Chemical Technology, L.P. Selective process for the preparation of diphenylmethane diisocyanate precursors
JP2008175295A (ja) * 2007-01-18 2008-07-31 Aisin Ai Co Ltd 手動変速機のリバースレストリクト機構

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB461352A (en) * 1935-07-11 1937-02-11 Deutschen Celluloid Fabrik Manufacture of condensation products and of lacquers and plastic masses therefrom
US2946768A (en) * 1957-08-12 1960-07-26 Bayer Ag Condensation products of carbamic acid esters
US4014914A (en) * 1970-01-12 1977-03-29 Badische Anilin- & Soda-Fabrik Aktiengesellschaft Manufacture of 4,4'-diphenylmethane diisocyanate and a mixture of diisocyanates and polyisocyanates
US3962302A (en) * 1974-03-08 1976-06-08 Atlantic Richfield Company Production of isocyanates from esters of carbamic acids (urethanes)
US3919279A (en) * 1974-06-26 1975-11-11 Atlantic Richfield Co Catalytic production of isocyanates from esters of carbamic acids

Also Published As

Publication number Publication date
NO793255L (no) 1980-04-22
FR2439183A1 (fr) 1980-05-16
BE879534A (fr) 1980-04-21
PL217432A1 (es) 1980-04-21
GB2034691A (en) 1980-06-11
NL7903674A (nl) 1980-04-22
JPS5557550A (en) 1980-04-28
IT7949854A0 (it) 1979-07-25
CA1116177A (en) 1982-01-12
IT1119798B (it) 1986-03-10
AU4768679A (en) 1980-04-24
DE2931473A1 (de) 1980-04-30
US4162362A (en) 1979-07-24
JPS6123182B2 (es) 1986-06-04
YU155879A (en) 1982-08-31
PL117371B1 (en) 1981-07-31
FR2439183B1 (es) 1984-09-14
GB2034691B (en) 1983-05-11
SE7908699L (sv) 1980-04-21
BR7904877A (pt) 1980-07-15

Similar Documents

Publication Publication Date Title
ES482987A1 (es) Un procedimiento para la preparacion de dicarbamatos de di- fenilmetano y carbamatos de polimetilenpolifenilo
NL7608745A (nl) Werkwijze ter bereiding van aromatische isocyanaten.
ES444565A1 (es) Procedimiento para la obtencion de poliisocianatos con gru- pos isocianato bloqueados conteniendo grupos uretdiona.
FR2351986A1 (fr) Carbamates d'halosilyle et leur procede de transformation en isocyanates
FI20085733A (fi) Menetelmiä sairauden hoitamiseksi käyttäen Sertoli-soluja ja allografteja tai ksenografteja
ES478687A1 (es) Un procedimiento para la preparacion de derivados de acido carbamico.
Mahler et al. A FOUR MEMBERED PHOSPHORUS RING1
JPS56103153A (en) Urethane manufacture
ES2066065T3 (es) Procedimiento para la obtencion de poliisocianatos que muestran grupos uretdion.
BR8700114A (pt) Processo para a obtencao de compostos organicos,compostos obtidos e utilizacao
FR2363552A1 (fr) Nouvelles n-aryl-n'-(cyclo)-alkyl-thiourees, leur procede de preparation et leur application a la lutte contre des parasites animaux et vegetaux
GB1508077A (en) Process for preparing isocyanic acid derivatives
UST994004I4 (en) Process for the preparation of diphenylmethane dicarbamates and polymethylene polyphenyl carbamates using solid acid catalysts
JPS57167316A (en) Piperidine group-containing high molecular weight ester and urethane, manufacture and use
US2951786A (en) Bactericidal and fungicidal compositions comprising pentahalophenyl n-(phenyl) carbamates
ATE2012T1 (de) Verfahren zur herstellung von hydantoingruppen enthaltenden verbindungen.
FR1351368A (fr) Composés d'isocyanates organiques et leur procédé de fabrication
ES453242A1 (es) Procedimiento para la obtencion "in situ" de dispersiones estables.
ATE1857T1 (de) Verfahren zur herstellung von urethanen und ihre verwendung zur herstellung von isocyanaten.
JPS52111539A (en) Preparation of p-nitrophenylchloroformates
FR2326422A1 (fr) Procede de production de nouvelles triazine-2,4-diones et leur application comme insecticides
GB1298515A (en) Substituted phenylcarbamic acid ester, process for its preparation, and its use as insecticide
FR1243115A (fr) Procédé pour accélérer la réaction d'un isocyanate ou d'un isothiocyanate avec un composé à hydrogène actif en présence d'un dérivé organique de l'arsenic, du bismuth ou de l'antimoine
KR790000348B1 (en) Process for preparation of benzimidazole-1- carboxylic acid amides
KR790000764B1 (en) Production of isocyanates from esters of carbamic acids