FR2230624B1 - - Google Patents

Info

Publication number
FR2230624B1
FR2230624B1 FR7407880A FR7407880A FR2230624B1 FR 2230624 B1 FR2230624 B1 FR 2230624B1 FR 7407880 A FR7407880 A FR 7407880A FR 7407880 A FR7407880 A FR 7407880A FR 2230624 B1 FR2230624 B1 FR 2230624B1
Authority
FR
France
Prior art keywords
product
stage
dissociation
isocyanate
condense out
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
FR7407880A
Other languages
English (en)
Other versions
FR2230624A1 (fr
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.)
Air Products and Chemicals Inc
Original Assignee
Air Products and Chemicals Inc
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 Air Products and Chemicals Inc filed Critical Air Products and Chemicals Inc
Publication of FR2230624A1 publication Critical patent/FR2230624A1/fr
Application granted granted Critical
Publication of FR2230624B1 publication Critical patent/FR2230624B1/fr
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C263/00—Preparation of derivatives of isocyanic acid
    • C07C263/04—Preparation of derivatives of isocyanic acid from or via carbamates or carbamoyl halides

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
FR7407880A 1973-03-05 1974-03-01 Expired FR2230624B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US337954A US3870739A (en) 1973-03-05 1973-03-05 Isocyanates from urethanes

Publications (2)

Publication Number Publication Date
FR2230624A1 FR2230624A1 (fr) 1974-12-20
FR2230624B1 true FR2230624B1 (fr) 1977-09-16

Family

ID=23322752

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7407880A Expired FR2230624B1 (fr) 1973-03-05 1974-03-01

Country Status (5)

Country Link
US (1) US3870739A (fr)
BE (1) BE811863A (fr)
DE (1) DE2410505C2 (fr)
FR (1) FR2230624B1 (fr)
NL (1) NL179373C (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5679657A (en) * 1979-12-04 1981-06-30 Mitsui Toatsu Chem Inc Novel preparation of polyisocyanate
DE3021299A1 (de) * 1980-06-06 1982-01-07 Basf Ag, 6700 Ludwigshafen Verfahren zur herstellung von isocyanaten
DE3047898A1 (de) * 1980-12-19 1982-07-15 Bayer Ag, 5090 Leverkusen Verfahren zur kontinuierlichen thermischen spaltung von carbamidsaeureestern und die verwendung von hierbei anfallenden isocyanate und carbamidsaeureester aufweisenden gemischen zur herstellung von isocyanaten
US4487713A (en) * 1981-06-26 1984-12-11 Exxon Research & Engineering Co. Production of isocyanates from esters of aromatic carbamic acids (urethanes)
DE3142627A1 (de) * 1981-10-28 1983-05-05 Basf Ag, 6700 Ludwigshafen Verfahren zur herstellung von isocyanaten durch thermische spaltung von urethanen
DE3215591A1 (de) * 1982-04-27 1983-10-27 Bayer Ag, 5090 Leverkusen Verfahren zur kontinuierlichen thermischen spaltung von carbamidsaeureestern
DE3339300A1 (de) * 1983-10-29 1985-05-09 Basf Ag, 6700 Ludwigshafen Verfahren zur herstellung von isocyanaten durch thermische spaltung von urethanen
ATE80612T1 (de) * 1986-11-03 1992-10-15 American Cyanamid Co Herstellung eines diisocyanats aus norbornadien.
DE4137428A1 (de) * 1991-11-14 1993-05-19 Bayer Ag Verfahren zur herstellung von polyisocyanaten
ES2166922T3 (es) * 1996-03-15 2002-05-01 Bayer Ag Uso de disolventes o mezclas de disolventes de alto punto de ebullicion como medio intercambiador de calor para la disociacion termica de esteres de acidos carbamicos.
EP2011782A1 (fr) * 2007-07-02 2009-01-07 Huntsman International Llc Procédé de synthèse de carbamates utilisant du CO2
CN101531619B (zh) * 2009-04-21 2013-04-03 山东润兴化工科技有限公司 一种氨基烷酸酯热解制备异氰酸酯的装置
CN101870665B (zh) * 2010-05-18 2014-04-30 中国科学院过程工程研究所 用于氨基甲酸酯热解反应的气液固三相逆流反应装置及其方法
CN101844064B (zh) * 2010-05-18 2014-09-24 中国科学院过程工程研究所 一种气相热解制备异氰酸酯的反应器及制备方法
CN101857556A (zh) * 2010-05-18 2010-10-13 中国科学院过程工程研究所 一种气相热解制备异氰酸酯的系统及其方法
EP4098677A1 (fr) 2021-06-02 2022-12-07 Covestro Deutschland AG Pyrolyse d'une matière comportant un composé de polyuréthane destinée à la récupération des matières premières
EP4137525A1 (fr) 2021-08-20 2023-02-22 Covestro Deutschland AG Pyrolyse d'un composé polyuréthane polymère permettant de récupérer les matières premières

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2409712A (en) * 1944-02-03 1946-10-22 Du Pont Chemical process and products
US3734941A (en) * 1968-09-06 1973-05-22 American Cyanamid Co Process for converting urethanes to isocyanates

Also Published As

Publication number Publication date
US3870739A (en) 1975-03-11
NL179373C (nl) 1986-09-01
BE811863A (fr) 1974-07-01
NL7402897A (fr) 1974-09-09
NL179373B (nl) 1986-04-01
DE2410505A1 (de) 1974-09-12
DE2410505C2 (de) 1982-09-30
FR2230624A1 (fr) 1974-12-20

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Legal Events

Date Code Title Description
ST Notification of lapse