CA2102587A1 - A process for the preparation of dinitrotoluene - Google Patents

A process for the preparation of dinitrotoluene

Info

Publication number
CA2102587A1
CA2102587A1 CA002102587A CA2102587A CA2102587A1 CA 2102587 A1 CA2102587 A1 CA 2102587A1 CA 002102587 A CA002102587 A CA 002102587A CA 2102587 A CA2102587 A CA 2102587A CA 2102587 A1 CA2102587 A1 CA 2102587A1
Authority
CA
Canada
Prior art keywords
dinitrotoluene
preparation
weight
specified composition
toluene
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
CA002102587A
Other languages
French (fr)
Other versions
CA2102587C (en
Inventor
Thomas Schieb
Gerhard Wiechers
Rudolf Sundermann
Uwe Zarnack
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.)
Bayer AG
Original Assignee
Individual
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
Priority claimed from DE4238390A external-priority patent/DE4238390A1/en
Priority claimed from DE4309140A external-priority patent/DE4309140C2/en
Application filed by Individual filed Critical Individual
Publication of CA2102587A1 publication Critical patent/CA2102587A1/en
Application granted granted Critical
Publication of CA2102587C publication Critical patent/CA2102587C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C201/00—Preparation of esters of nitric or nitrous acid or of compounds containing nitro or nitroso groups bound to a carbon skeleton
    • C07C201/06—Preparation of nitro compounds
    • C07C201/08—Preparation of nitro compounds by substitution of hydrogen atoms by nitro groups
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C201/00—Preparation of esters of nitric or nitrous acid or of compounds containing nitro or nitroso groups bound to a carbon skeleton
    • C07C201/06—Preparation of nitro compounds
    • C07C201/16—Separation; Purification; Stabilisation; Use of additives
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C205/00—Compounds containing nitro groups bound to a carbon skeleton
    • C07C205/06—Compounds containing nitro groups bound to a carbon skeleton having nitro groups bound to carbon atoms of six-membered aromatic rings

Landscapes

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

Abstract

A continuous process for the preparation of isomeric mixtures of dinitrotoluene by a single stage nitration of toluene under adiabatic conditions. The reaction enthalpy is used for the removal by distillation of the water of reaction formed during nitration. In this process, toluene is reacted with a nitrating acid having from about 80 to about 100% by weight of an inorganic component having a specified composition and from about 0 to about 20% by weight of an organic component having a specified composition.
CA002102587A 1992-11-13 1993-11-09 A process for the preparation of dinitrotoluene Expired - Fee Related CA2102587C (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DEP4238390.0 1992-11-13
DE4238390A DE4238390A1 (en) 1992-11-13 1992-11-13 Continuous prepn. of di:nitrotoluene isomer mixts. under mild adiabatic reaction conditions
DE4309140A DE4309140C2 (en) 1993-03-22 1993-03-22 Process for the production of dinitrotoluene
DEP4309140.7 1993-03-22

Publications (2)

Publication Number Publication Date
CA2102587A1 true CA2102587A1 (en) 1994-05-14
CA2102587C CA2102587C (en) 2004-09-14

Family

ID=25920435

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002102587A Expired - Fee Related CA2102587C (en) 1992-11-13 1993-11-09 A process for the preparation of dinitrotoluene

Country Status (10)

Country Link
EP (1) EP0597361B1 (en)
JP (1) JP3461878B2 (en)
KR (1) KR100326214B1 (en)
CN (1) CN1040427C (en)
BR (1) BR9304716A (en)
CA (1) CA2102587C (en)
DE (1) DE59303857D1 (en)
ES (1) ES2091539T3 (en)
MX (1) MX9306835A (en)
TW (1) TW236610B (en)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4428460A1 (en) * 1994-08-11 1996-02-15 Bayer Ag Process for the production of nitro aromatics
DE4428462A1 (en) * 1994-08-11 1996-02-15 Bayer Ag Process for the production of dinitrotoluene
DE4428459A1 (en) * 1994-08-11 1996-02-15 Bayer Ag Process for the production of dinitrotoluene
DE4428461A1 (en) * 1994-08-11 1996-02-15 Bayer Ag Process for the production of dinitrotoluene
DE4437047A1 (en) * 1994-10-17 1996-04-18 Bayer Ag Process for the dinitration of aromatic compounds
DE19521614A1 (en) * 1995-06-14 1996-12-19 Bayer Ag Process for the production of dinitrotoluene
DE19745119A1 (en) * 1997-10-13 1999-04-15 Bayer Ag Process for the production of dinitrotoluene in an adiabatic procedure
DE10307140A1 (en) * 2003-02-20 2004-09-09 Bayer Ag Two-stage nitration of toluene to produce dinitrotoluene has an adiabatic and then an isothermal stage so as to give heat savings and improve safety
US7122701B2 (en) * 2003-06-04 2006-10-17 Bayer Aktiengesellschaft Process for preparing aromatic amines
DE10345601A1 (en) * 2003-09-29 2005-05-12 Basf Ag Process for removing nitro cresols from mononitrotoluene wastewater and for further use of the extract
DE102004005913A1 (en) 2004-02-05 2005-08-25 Basf Ag Process for the preparation of dinitrotoluene
CN101679200A (en) * 2007-06-27 2010-03-24 Hrd有限公司 System and process for production of nitrobenzene
CN101445458B (en) * 2009-01-06 2010-10-06 烟台巨力异氰酸酯有限公司 Dinitrotoluene phase disengagement method
DE102010006984A1 (en) * 2010-02-05 2011-08-11 Bayer MaterialScience AG, 51373 Process for the continuous production of nitrobenzene
KR20140037139A (en) 2011-05-24 2014-03-26 바스프 에스이 Process for preparing polyisocyanates from biomass
US8933262B2 (en) 2011-05-24 2015-01-13 Basf Se Process for preparing polyisocyanates from biomass
DE102017110084B4 (en) 2017-02-03 2019-07-04 Josef Meissner Gmbh & Co. Kg Process and plant for the adiabatic nitration of aromatics

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2256999A (en) * 1939-03-08 1941-09-23 Du Pont Nitration of organic compounds
FR1372978A (en) * 1963-10-31 1964-09-18 Du Pont Continuous production of m-dinitrobenzene
US3928475A (en) * 1974-08-09 1975-12-23 Du Pont Azeotropic nitration of benzene
US4021498A (en) * 1975-12-09 1977-05-03 American Cyanamid Company Adiabatic process for nitration of nitratable aromatic compounds
US4091042A (en) * 1977-08-19 1978-05-23 American Cyanamid Company Continuous adiabatic process for the mononitration of benzene
JPS5850211B2 (en) * 1978-08-30 1983-11-09 三井東圧化学株式会社 Method for producing dinitrotoluene
US5099078A (en) * 1990-12-21 1992-03-24 Olin Corporation Process for preparing dinitrotoluene

Also Published As

Publication number Publication date
EP0597361A1 (en) 1994-05-18
MX9306835A (en) 1995-01-31
KR940011433A (en) 1994-06-21
BR9304716A (en) 1994-11-01
CN1040427C (en) 1998-10-28
JPH07309814A (en) 1995-11-28
KR100326214B1 (en) 2002-11-18
JP3461878B2 (en) 2003-10-27
CN1095707A (en) 1994-11-30
EP0597361B1 (en) 1996-09-18
MX186144B (en) 1997-09-26
DE59303857D1 (en) 1996-10-24
ES2091539T3 (en) 1996-11-01
TW236610B (en) 1994-12-21
CA2102587C (en) 2004-09-14

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