EP2464625A2 - Procédé de production de diisocyanates par phosgénation en phase gazeuse - Google Patents

Procédé de production de diisocyanates par phosgénation en phase gazeuse

Info

Publication number
EP2464625A2
EP2464625A2 EP10742484A EP10742484A EP2464625A2 EP 2464625 A2 EP2464625 A2 EP 2464625A2 EP 10742484 A EP10742484 A EP 10742484A EP 10742484 A EP10742484 A EP 10742484A EP 2464625 A2 EP2464625 A2 EP 2464625A2
Authority
EP
European Patent Office
Prior art keywords
gas phase
hydrogen chloride
phase phosgenation
chlorine
heat transfer
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.)
Withdrawn
Application number
EP10742484A
Other languages
German (de)
English (en)
Inventor
Torsten Mattke
Gerhard Olbert
Carsten KNÖSCHE
Heiner Schelling
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 SE
Original Assignee
BASF SE
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 BASF SE filed Critical BASF SE
Priority to EP10742484A priority Critical patent/EP2464625A2/fr
Publication of EP2464625A2 publication Critical patent/EP2464625A2/fr
Withdrawn legal-status Critical Current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
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B7/00—Halogens; Halogen acids
    • C01B7/01—Chlorine; Hydrogen chloride
    • C01B7/03—Preparation from chlorides
    • C01B7/04—Preparation of chlorine from hydrogen chloride
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/703—Isocyanates or isothiocyanates transformed in a latent form by physical means
    • C08G18/705—Dispersions of isocyanates or isothiocyanates in a liquid medium
    • C08G18/707—Dispersions of isocyanates or isothiocyanates in a liquid medium the liquid medium being a compound containing active hydrogen not comprising water
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L97/00—Compositions of lignin-containing materials
    • C08L97/02—Lignocellulosic material, e.g. wood, straw or bagasse
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/10—Process efficiency
    • Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines

Definitions

  • the invention relates to a process for the preparation of diisocyanates by gas-phase phosgenation.
  • Diisocyanates are predominantly produced by phosgenation of the corresponding amines. This can be carried out both in the liquid and in the gas phase.
  • the gas phase phosgenation has in the technical implementation of the liquid phase phosgenation a number of advantages, in particular a higher selectivity, a lower HoId-up of toxic phosgene and lower investment and energy costs.
  • the two reactant streams, an amine-containing and a phosgene-containing reactant stream if they are not already in the gas phase, evaporated and brought to the reaction temperature of the gas phase phosgenation, from about 300 to 400 0 C.
  • the solution consists in a process for the preparation of diisocyanates by gas phase phosgenation starting from a reactant stream containing the corresponding diamines and a phosgene, wherein the reactant streams are separately transferred into the gas phase and preheated to the reaction temperature of the gas phase phosgenation, characterized in that the Waste heat from a plant for the production of chlorine is used by heterogeneously catalyzed oxidation of hydrogen chloride by the Deacon process.
  • the waste heat from a plant for the production of chlorine by heterogeneously catalyzed oxidation of hydrogen chloride can be used by the so-called Deacon process to the educt streams for the gas phase phosgenation for the production of diisocyanates to the required reaction temperature to bring from about 300 to 400 0 C.
  • the thermal coupling according to the invention of the Deacon process and the gas phase phosgenation is a technically simple, elegant solution because the temperature levels are similar, that is, the heat of reaction of the Deacon process can be used directly for heating the reactant streams for the gas phase phosgenation to diisocyanates.
  • a material coupling is possible:
  • the apparatus for example, when using molten salts as a heat carrier, be carried out in a lower pressure stage.
  • the waste heat that is to say the heat of reaction resulting from the heterogeneously catalyzed oxidation of hydrogen chloride from a Deacon process, is used for overheating and, if appropriate, evaporation of the educt streams of a gas phase phosgenation.
  • the invention is not limited to the specific implementation of the Deacon process; in particular, this can be carried out on a fixed or fluidized bed.
  • the amine preferably has a temperature in the range of 200 to 400 0 C.
  • the pressure of the added amine is preferably in the range between 0.05 to 3 bar absolute.
  • the temperature of the added phosgene is preferably in the range of 250 to 450 ° C.
  • the phosgene is usually heated prior to addition in a manner known to those skilled in the art.
  • an electric heating or a direct or indirect heating by combustion of a fuel is used.
  • the fuels used are usually fuel gases, for example natural gas.
  • By lowering the boiling temperature by lowering the pressure of the amine is also a heating, for Example by water vapor, possible.
  • the pressure of the water vapor is selected.
  • a suitable vapor pressure of the water vapor is for example in the range of 40 to 100 bar. This results in a temperature of the water vapor in the range of 250 to 31 1 ° C.
  • the evaporation of the phosgene is generally carried out at much lower temperatures. For this reason, water vapor can generally be used to evaporate the phosgene.
  • the necessary overheating of the phosgene to heat it to reaction temperature is generally possible only by electrical heating or direct or indirect heating by combustion of a fuel.
  • the phosgene-containing reactant stream generally has a high phosgene content of almost 100 wt .-%, and in addition residues of in particular nickel and chlorine.
  • the diamine stream containing diamines contains the diamines corresponding to the desired diisocyanate target product.
  • the diamines must be vaporizable without decomposition. It is possible to use aliphatic, cycloaliphatic or aromatic diamines, preferably aliphatic diamines.
  • Both the phosgene and the diamines-containing educt stream may each be diluted with an inert gas.
  • Diamines which are used in the process according to the invention for the reaction to give the corresponding isocyanates are those in which the diamine, the corresponding intermediates and the corresponding isocyanates are present in gaseous form under the reaction conditions chosen. Preference is given to diamines which, during the duration of the reaction under the reaction conditions, amount to at most 2 Mole%, more preferably at most 1 mole% and most preferably at most 0.5 mole% decompose. Particularly suitable here are diamines, in particular diamines, based on aliphatic or cycloaliphatic hydrocarbons having 2 to 18 carbon atoms.
  • 1,6-diaminohexane 1,5-diaminopentane
  • 1,3-bis (aminomethyl) cyclohexane 1,3-bis (aminomethyl) cyclohexane
  • IPDA 1-amino-3,3,5-trimethyl-5-amino-methylcyclohexane
  • HDA 1,6-diaminohexane
  • aromatic amines can be used for the process according to the invention, which can be converted into the gas phase without significant decomposition.
  • TDA toluenediamine
  • 2,6-isomer or as a mixture thereof, for example as 80:20 to 65:35 (mol / mol) -
  • MDA Methylene (diphenyldiamine)
  • isomeric mixtures thereof Preferred among these are the diamines, more preferably 2,4- and / or 2,6-TDA or 2,4'- and / or 4,4'-MDA.
  • the invention is not limited to the specific implementation of the gas phase phosgenation. This can advantageously be carried out as described in EP 08 168 617.2 by adding the educts to the reactor via an ejector or also by cooling the reaction gas mixture of the gas phase phosgenation in a quench to add a liquid quench medium, as described in EP 08 168 617.2 ,
  • the two feed streams are preferred, that is, the diamine and the phosgene-containing feed stream to a temperature in the range of about 300 to 400 0 C, preferably to a temperature in the range of about 330-380 0 C, preheated.
  • reaction gas mixture of the heterogeneously catalyzed oxidation of hydrogen chloride by the Deacon process can be used directly as a heat transfer medium for indirect heat transfer to the educt streams for the gas phase phosgenation.
  • the temperature of the reaction gas mixture of the Deacon process for heating a secondary heat carrier, in particular a molten salt or water vapor, and to heat the starting materials for the gas phase phosgenation with the secondary heat carrier.
  • a secondary heat carrier in particular a molten salt or water vapor
  • the preheating and, if necessary, the conversion of the educt streams into the gas phase can be carried out in conventional evaporator constructions, such as falling film, thin film or climbing film evaporators.
  • the preheating and, if necessary, the transfer to the gas phase of the reactant streams in each case in a tube bundle heat exchanger wherein preferably the respective educt flow is passed through the tubes of the tube bundle heat exchanger and the reaction gas mixture from the Deacon process or a secondary heat carrier through the shell space around the pipes.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Medicinal Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Polymers & Plastics (AREA)
  • Engineering & Computer Science (AREA)
  • Dispersion Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Materials Engineering (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

L'invention concerne un procédé de production de diisocyanates par phosgénation en phase gazeuse à partir d'un flux d'éduit contenant les diamines correspondantes et un phosgène, les flux d'éduit étant transportés respectivement séparément en phase gazeuse et préchauffés à la température de réaction de la phosgénation en phase gazeuse, caractérisé en ce qu'à cet effet, la chaleur dissipée émanant d'une installation de production de chlore par oxydation à catalyse hétérogène de gaz chlorhydrique étant utilisée selon le procédé Deacon.
EP10742484A 2009-08-11 2010-08-10 Procédé de production de diisocyanates par phosgénation en phase gazeuse Withdrawn EP2464625A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10742484A EP2464625A2 (fr) 2009-08-11 2010-08-10 Procédé de production de diisocyanates par phosgénation en phase gazeuse

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP09167604 2009-08-11
PCT/EP2010/061574 WO2011018443A2 (fr) 2009-08-11 2010-08-10 Procédé de production de diisocyanates par phosgénation en phase gazeuse
EP10742484A EP2464625A2 (fr) 2009-08-11 2010-08-10 Procédé de production de diisocyanates par phosgénation en phase gazeuse

Publications (1)

Publication Number Publication Date
EP2464625A2 true EP2464625A2 (fr) 2012-06-20

Family

ID=43426102

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10742484A Withdrawn EP2464625A2 (fr) 2009-08-11 2010-08-10 Procédé de production de diisocyanates par phosgénation en phase gazeuse

Country Status (7)

Country Link
US (1) US8716517B2 (fr)
EP (1) EP2464625A2 (fr)
JP (1) JP5666584B2 (fr)
KR (1) KR20120041257A (fr)
CN (1) CN102471243A (fr)
BR (1) BR112012002910A2 (fr)
WO (1) WO2011018443A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8981145B2 (en) 2010-03-18 2015-03-17 Basf Se Process for preparing isocyanates

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9321720B2 (en) 2010-10-14 2016-04-26 Basf Se Process for preparing isocyanates
US8969615B2 (en) 2011-03-31 2015-03-03 Basf Se Process for preparing isocyanates
US10590069B2 (en) * 2017-10-06 2020-03-17 International Business Machines Corporation Pinene-derived diisocyanates
WO2022106716A1 (fr) 2020-11-23 2022-05-27 Basf Se Procédé de production d'isocyanates
CN112724045B (zh) * 2021-01-05 2022-01-28 安徽东至广信农化有限公司 一种制备二异氰酸酯的方法及其装置

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US4959202A (en) * 1989-05-31 1990-09-25 Medalert Incorporated Recovery of chlorine from hydrogen chloride by carrier catalyst process
US5639436A (en) 1995-09-21 1997-06-17 University Of Southern California Exothermic two-stage process for catalytic oxidation of hydrogen chloride
JP4785515B2 (ja) * 2005-12-08 2011-10-05 住友化学株式会社 塩素の製造方法
DE502007001903D1 (de) 2006-01-27 2009-12-17 Basf Se Verfahren zur herstellung von chlor
US20070261437A1 (en) * 2006-05-12 2007-11-15 Boonstra Eric F Enhanced process for the purification of anhydrous hydrogen chloride gas
DE102006022447A1 (de) * 2006-05-13 2007-11-15 Bayer Materialscience Ag Verfahren zur gekoppelten Herstellung von Chlor und Isocyanaten
JP2010508374A (ja) 2006-11-07 2010-03-18 ビーエーエスエフ ソシエタス・ヨーロピア イソシアネートの製造方法
DE102006058634A1 (de) 2006-12-13 2008-06-19 Bayer Materialscience Ag Verfahren zur Herstellung von Isocyanaten in der Gasphase
DE102006058633A1 (de) * 2006-12-13 2008-06-19 Bayer Materialscience Ag Verfahren zur Herstellung von Isocyanaten in der Gasphase
DE102007018014A1 (de) 2007-04-17 2008-10-23 Bayer Materialscience Ag Wärmeintegration in einem Deacon-Prozess
DE102007020444A1 (de) * 2007-04-27 2008-11-06 Bayer Materialscience Ag Verfahren zur Oxidation eines Chlorwasserstoffenthaltenden Gasgemisches
WO2009027232A1 (fr) 2007-08-30 2009-03-05 Basf Se Procédé de production d'isocyanates
WO2009027234A1 (fr) 2007-08-30 2009-03-05 Basf Se Procédé de production d'isocyanates
BRPI0816892A2 (pt) 2007-09-19 2015-03-24 Basf Se Processo para preparar diisocianatos
US8765996B2 (en) 2008-07-23 2014-07-01 Basf Se Process for preparing isocyanates
ATE550317T1 (de) 2008-08-07 2012-04-15 Basf Se Verfahren zur herstellung von aromatischen isocyanaten
EP2349986B1 (fr) 2008-10-15 2013-04-24 Basf Se Procede pour produire des isocyanates
EP2364294B1 (fr) 2008-11-07 2013-07-03 Basf Se Procédé de fabrication d'isocyanates
WO2010057909A1 (fr) 2008-11-19 2010-05-27 Basf Se Procédé de production d'un isocyanate
WO2010063665A1 (fr) 2008-12-03 2010-06-10 Basf Se Procédé de production d'isocyanates
CN102341369B (zh) 2009-03-06 2015-11-25 巴斯夫欧洲公司 用于制备异氰酸酯的方法和装置
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8981145B2 (en) 2010-03-18 2015-03-17 Basf Se Process for preparing isocyanates

Also Published As

Publication number Publication date
CN102471243A (zh) 2012-05-23
WO2011018443A2 (fr) 2011-02-17
WO2011018443A3 (fr) 2011-04-21
BR112012002910A2 (pt) 2016-04-05
JP5666584B2 (ja) 2015-02-12
US20120142959A1 (en) 2012-06-07
KR20120041257A (ko) 2012-04-30
US8716517B2 (en) 2014-05-06
JP2013501747A (ja) 2013-01-17

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