FR2325637A1 - Isocyanate prepn. by phos:genation of amines - contacting reactants as concentric streams - Google Patents

Isocyanate prepn. by phos:genation of amines - contacting reactants as concentric streams

Info

Publication number
FR2325637A1
FR2325637A1 FR7628343A FR7628343A FR2325637A1 FR 2325637 A1 FR2325637 A1 FR 2325637A1 FR 7628343 A FR7628343 A FR 7628343A FR 7628343 A FR7628343 A FR 7628343A FR 2325637 A1 FR2325637 A1 FR 2325637A1
Authority
FR
France
Prior art keywords
amines
genation
prepn
phos
isocyanate
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.)
Granted
Application number
FR7628343A
Other languages
French (fr)
Other versions
FR2325637B3 (en
Inventor
Hans Iben
Siegfried Kattanek
Lothar Backhauss
Gerd Welschinger
Benno Gansera
Siegbert Loschau
Albert Meyer
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.)
BASF Schweiz AG
Original Assignee
Synthesewerk Schwarzheide 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.)
Filing date
Publication date
Application filed by Synthesewerk Schwarzheide AG filed Critical Synthesewerk Schwarzheide AG
Publication of FR2325637A1 publication Critical patent/FR2325637A1/en
Application granted granted Critical
Publication of FR2325637B3 publication Critical patent/FR2325637B3/fr
Granted 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
    • C07C263/10—Preparation of derivatives of isocyanic acid by reaction of amines with carbonyl halides, e.g. with phosgene

Landscapes

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

Abstract

Amines are converted into mono-, di- and polyisocyanates by phosgenation under pressure and at high temps. in the presence of one and the same solvent. The process comprises feeding to a reactor an annular stream of an amine-monochlorobenzene mixt. inside and around which concentric streams of a phosgene-monochlorobenzene are respectively allowed to flow. Phosgenation is accelerated with reduced formation of by-prods. e.g. polyurea. The tubular reactor can therefore be operated during longer periods than in prior art reactors (e.g. for 6 days instead of =3 days).
FR7628343A 1975-09-23 1976-09-21 Isocyanate prepn. by phos:genation of amines - contacting reactants as concentric streams Granted FR2325637A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DD18867275A DD132340B1 (en) 1975-09-23 1975-09-23 PROCESS FOR PHOSPHANTING AMINES TO MONO, DI AND POLYISOCYANATES

Publications (2)

Publication Number Publication Date
FR2325637A1 true FR2325637A1 (en) 1977-04-22
FR2325637B3 FR2325637B3 (en) 1979-06-01

Family

ID=5501880

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7628343A Granted FR2325637A1 (en) 1975-09-23 1976-09-21 Isocyanate prepn. by phos:genation of amines - contacting reactants as concentric streams

Country Status (2)

Country Link
DD (1) DD132340B1 (en)
FR (1) FR2325637A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0065727A1 (en) * 1981-05-27 1982-12-01 Bayer Ag Process for the continuous production of organic mono or polyisocyanates
US6576788B1 (en) 1998-04-21 2003-06-10 Basf Aktiengesellschaft Method for producing mixtures consisting of diphenylmethane diisocyanates and polyphenylene-polymethylene-polyisocyanates containing a reduced amount of chlorinated secondary products and with a reduced iodine color index
EP1555258A1 (en) * 2003-12-18 2005-07-20 Bayer MaterialScience AG Preparation of di- and/or triisocyanates
US20100130772A1 (en) * 2005-04-08 2010-05-27 Huntsman International Llc Spiral mixer nozzle and method for mixing two or more fluids and process for manufacturing isocyanates
US10112892B2 (en) 2015-06-29 2018-10-30 Covestro Deutschland Ag Process for preparing polyisocyanates
US10815193B2 (en) 2015-06-29 2020-10-27 Covestro Deutschland Ag Process for providing hydrogen chloride for chemical reactions

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4217019A1 (en) * 1992-05-22 1993-11-25 Bayer Ag Process for the preparation of aromatic diisocyanates
DE10260082A1 (en) 2002-12-19 2004-07-01 Basf Ag Process for the continuous production of isocyanates
US9272988B2 (en) 2012-09-24 2016-03-01 Covestro Deutschland Ag Method for producing diisocyanates by phosgenating diamine suspensions

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0065727A1 (en) * 1981-05-27 1982-12-01 Bayer Ag Process for the continuous production of organic mono or polyisocyanates
US6576788B1 (en) 1998-04-21 2003-06-10 Basf Aktiengesellschaft Method for producing mixtures consisting of diphenylmethane diisocyanates and polyphenylene-polymethylene-polyisocyanates containing a reduced amount of chlorinated secondary products and with a reduced iodine color index
EP1555258A1 (en) * 2003-12-18 2005-07-20 Bayer MaterialScience AG Preparation of di- and/or triisocyanates
US20100130772A1 (en) * 2005-04-08 2010-05-27 Huntsman International Llc Spiral mixer nozzle and method for mixing two or more fluids and process for manufacturing isocyanates
KR101186693B1 (en) 2005-04-08 2012-09-27 헌트스만 인터내셔날, 엘엘씨 Spiral mixer nozzle and method for mixing two or more fluids and process for manufacturing isocyanates
US8844574B2 (en) * 2005-04-08 2014-09-30 Huntsman International Llc Spiral mixer nozzle and method for mixing two or more fluids and process for manufacturing isocyanates
US9498757B2 (en) 2005-04-08 2016-11-22 Huntsman International Llc Spiral mixer nozzle and method for mixing two or more fluids and process for manufacturing isocyanates
US10112892B2 (en) 2015-06-29 2018-10-30 Covestro Deutschland Ag Process for preparing polyisocyanates
US10815193B2 (en) 2015-06-29 2020-10-27 Covestro Deutschland Ag Process for providing hydrogen chloride for chemical reactions

Also Published As

Publication number Publication date
DD132340B1 (en) 1983-06-08
DD132340A1 (en) 1978-09-20
FR2325637B3 (en) 1979-06-01

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Legal Events

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