NL179373B - Werkwijze ter bereiding van aromatische isocyanaten door thermische dissociatie van methanen. - Google Patents

Werkwijze ter bereiding van aromatische isocyanaten door thermische dissociatie van methanen.

Info

Publication number
NL179373B
NL179373B NLAANVRAGE7402897,A NL7402897A NL179373B NL 179373 B NL179373 B NL 179373B NL 7402897 A NL7402897 A NL 7402897A NL 179373 B NL179373 B NL 179373B
Authority
NL
Netherlands
Prior art keywords
product
methans
stage
dissociation
aromatic isocyanates
Prior art date
Application number
NLAANVRAGE7402897,A
Other languages
English (en)
Other versions
NL179373C (nl
NL7402897A (nl
Original Assignee
Air Prod & Chem
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 Prod & Chem filed Critical Air Prod & Chem
Publication of NL7402897A publication Critical patent/NL7402897A/xx
Publication of NL179373B publication Critical patent/NL179373B/nl
Application granted granted Critical
Publication of NL179373C publication Critical patent/NL179373C/nl

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)
NLAANVRAGE7402897,A 1973-03-05 1974-03-04 Werkwijze ter bereiding van aromatische isocyanaten door thermische dissociatie van methanen. NL179373C (nl)

Applications Claiming Priority (1)

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

Publications (3)

Publication Number Publication Date
NL7402897A NL7402897A (nl) 1974-09-09
NL179373B true NL179373B (nl) 1986-04-01
NL179373C NL179373C (nl) 1986-09-01

Family

ID=23322752

Family Applications (1)

Application Number Title Priority Date Filing Date
NLAANVRAGE7402897,A NL179373C (nl) 1973-03-05 1974-03-04 Werkwijze ter bereiding van aromatische isocyanaten door thermische dissociatie van methanen.

Country Status (5)

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

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
DE3781764T2 (de) * 1986-11-03 1993-02-04 American Cyanamid Co Herstellung eines diisocyanats aus norbornadien.
DE4137428A1 (de) * 1991-11-14 1993-05-19 Bayer Ag Verfahren zur herstellung von polyisocyanaten
DE59705128D1 (de) * 1996-03-15 2001-12-06 Bayer Ag Verfahren zur thermischen Spaltung von Carbamidsäureestern
EP2011782A1 (en) * 2007-07-02 2009-01-07 Huntsman International Llc Process for the synthesis of carbamates using 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
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
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
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
EP4098677A1 (de) 2021-06-02 2022-12-07 Covestro Deutschland AG Pyrolyse von material mit polyurethan-verbindung zur wiedergewinnung von rohstoffen
EP4137525A1 (de) 2021-08-20 2023-02-22 Covestro Deutschland AG Pyrolyse von polymerer polyurethan-verbindung zur wiedergewinnung von rohstoffen

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
DE2410505C2 (de) 1982-09-30
DE2410505A1 (de) 1974-09-12
FR2230624A1 (nl) 1974-12-20
NL179373C (nl) 1986-09-01
US3870739A (en) 1975-03-11
NL7402897A (nl) 1974-09-09
FR2230624B1 (nl) 1977-09-16
BE811863A (fr) 1974-07-01

Similar Documents

Publication Publication Date Title
NL179373C (nl) Werkwijze ter bereiding van aromatische isocyanaten door thermische dissociatie van methanen.
GB1030305A (en) Organic polyisocyanates
ES462357A1 (es) Procedimiento de obtencion de poliisocianatos de estructura isocianurato.
BR9000003A (pt) Processo para preparacao de poliisocianatos modificados,contendo grupos uretdiona e isocianurato,os ditos poliisocianatos e sua utilizacao
GB899036A (en) Process for the production of carbodiimide polyisocyanate adducts
GB857086A (en) Process for the manufacture of carbon tetrachloride
GB1139422A (en) A process for the production of cross-linkable high molecular weight reaction products of isocyanates
GB1032838A (en) Hydrogenation process
GB903613A (en) Improvements in or relating to the production of acetoacetic acid esters
IL45092A (en) Preparation of 2, 2, 6, 6 - tetramethyl - 4 - oxypifridine
GB952805A (en) Process for the production of isocyanide dichloride derivatives
Hata Photochemical Processes due to n-π* and π-π* Transitions of 2-Picoline N-Oxide in the Vapor Phase
GB915430A (en) Synthesis of carbazoles
GB815151A (en) Cyclodiene dimerizing process
GB1047215A (nl)
US2819309A (en) Production of vitamin a amine
US2819311A (en) Production of vitamin a aldehyde
AU538607B2 (en) N-substituted urethanes
US3399233A (en) Process for the preparation of 2-aryl 1, 1, 3, 3-tetraalkyl guanidines
FR2262917A2 (en) Decolouration of Cyanophyce algae by solvent extn - using an aliphatic hydrocarbon, alcohol or ketone or an aromatic hydrocarbon and drying the residue
GB1033218A (en) Process for the production of 3-alkylphenols
GB1112450A (en) Purification of organic isocyanates
GB864717A (en) A process for the production of high molecular weight polyethylene terephthalate
GB951501A (en) A process for preparing sulpholene
GB989801A (en) Process for the production of anhydrous formaldehyde

Legal Events

Date Code Title Description
BA A request for search or an international-type search has been filed
BB A search report has been drawn up
BC A request for examination has been filed
A85 Still pending on 85-01-01
BK Erratum

Free format text: IN PAT.BUL.17/86,PAGE 2034 ON LINE 3 OF THE TITLE INVENTION SHOULD READ:CORRECTION TO PAMPHLET

BK Erratum

Free format text: IN PAT.BUL.17/86,PAGE 2034 ON LINE 3 THE TITLE OF THE INVENTION SHOULD READ

V1 Lapsed because of non-payment of the annual fee