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RU94046238A - Method for production of dinitrotoluenes and product being prepared by this method - Google Patents

Method for production of dinitrotoluenes and product being prepared by this method

Info

Publication number
RU94046238A
RU94046238A RU94046238/04A RU94046238A RU94046238A RU 94046238 A RU94046238 A RU 94046238A RU 94046238/04 A RU94046238/04 A RU 94046238/04A RU 94046238 A RU94046238 A RU 94046238A RU 94046238 A RU94046238 A RU 94046238A
Authority
RU
Russia
Prior art keywords
reaction
toluene
nitric acid
dinitrotoluene
absence
Prior art date
Application number
RU94046238/04A
Other languages
Russian (ru)
Other versions
RU2106338C1 (en
Inventor
В.Мейсон Роберт
Us]
Original Assignee
Олин Корпорейшн (US)
Олин Корпорейшн
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 Олин Корпорейшн (US), Олин Корпорейшн filed Critical Олин Корпорейшн (US)
Publication of RU94046238A publication Critical patent/RU94046238A/en
Application granted granted Critical
Publication of RU2106338C1 publication Critical patent/RU2106338C1/en

Links

Classifications

    • 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
    • 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

Landscapes

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

Abstract

FIELD: production of dinitrotoluene. SUBSTANCE: method involves nitration of toluene in liquid phase. The process is carried out with the help of anhydrous nitric acid at 20-30 C within less than 15 min, molar ratio of total amount of nitric acid and water to toluene being 10:1-15:1. Said reaction takes place in the absence of sulfuric acid and any aprotic bipolar solvent, it is followed by distillation in vacuum. EFFECT: improves efficiency of the method.

Claims (1)

Это изобретение описывает способ нитрования толуола для получения динитротолуола, характеризующийся жидкофазной реакцией нитрования, отличающийся тем, что это реакция безводной азотной кислоты с толуолом в реакторе при температуре реакции между 20 и 30oС за время реакции менее 15 мин при молярном соотношении азотная кислота плюс вода к толуолу между 10 : 1 и 15 : 1, причем вышеназванная реакция проводится в отсутствии серной кислоты и любого апротонного диполярного растворителя при проведении реакции и при отсутствии любого апротонного диполярного растворителя для остановки реакции для получения вышеназванного динитротолуола в смеси продуктов без примеси нитрокрезола с последующей перегонкой в вакууме смеси продуктов без использования любого апротонного диполярного растворителя для удаления непрореагировавшей азотной кислоты из вышеназванной смеси продуктов, получая тем самым вышеназванный динитротолуол.This invention describes a toluene nitration method for producing dinitrotoluene, characterized by a liquid-phase nitration reaction, characterized in that it is a reaction of anhydrous nitric acid with toluene in a reactor at a reaction temperature of between 20 and 30 ° C. for a reaction time of less than 15 minutes with a molar ratio of nitric acid to water to toluene between 10: 1 and 15: 1, the above reaction being carried out in the absence of sulfuric acid and any aprotic dipolar solvent during the reaction and in the absence of any aprotic dipo yarnogo solvent to stop the reaction to obtain the above dinitrotoluene in a product mixture without nitrocresols impurities followed by distillation in vacuo, the product mixture without using any aprotic dipolar solvent, to remove unreacted nitric acid from said mixture of products, thereby obtaining the above-mentioned dinitrotoluene.
RU94046238A 1992-06-17 1993-06-01 Method of preparing dinitrotoluene RU2106338C1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US90021392A 1992-06-17 1992-06-17
US900.213 1992-06-17
US900,213 1992-06-17
PCT/US1993/005081 WO1993025503A1 (en) 1992-06-17 1993-06-01 Process for the production of dinitrotoluene

Publications (2)

Publication Number Publication Date
RU94046238A true RU94046238A (en) 1996-10-10
RU2106338C1 RU2106338C1 (en) 1998-03-10

Family

ID=25412168

Family Applications (1)

Application Number Title Priority Date Filing Date
RU94046238A RU2106338C1 (en) 1992-06-17 1993-06-01 Method of preparing dinitrotoluene

Country Status (7)

Country Link
EP (1) EP0649400A1 (en)
KR (1) KR950701903A (en)
AU (1) AU665843B2 (en)
BR (1) BR9306554A (en)
CA (1) CA2138391A1 (en)
RU (1) RU2106338C1 (en)
WO (1) WO1993025503A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
RU2295953C2 (en) * 2004-07-12 2007-03-27 Тиберий Георгиевич Незбайло Hydrophilic and hydrophobic compositions for treatment infectious or viral diseases and method for their using
DE102005050106B4 (en) * 2005-10-18 2008-04-30 Josef Meissner Gmbh & Co. Kg Recovery of nitrating acid mixtures from nitrite processes

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3928395A (en) * 1972-10-05 1975-12-23 Ciba Geigy Ag Process for the nitration of aromatic compounds
US4495372A (en) * 1982-11-05 1985-01-22 Uniroyal, Inc. Preparation of mono-nitro aromatic compounds
US4935557A (en) * 1984-08-07 1990-06-19 Air Products And Chemicals, Inc. Conitration of mixed aromatic hydrocarbons
US5001272A (en) * 1988-06-22 1991-03-19 Olin Corporation Process for the production of dinitrotoluene
AU3863089A (en) * 1988-06-22 1990-01-12 Olin Corporation Process for the production of dinitrotoluene or mononitrobenzene
US4918250A (en) * 1989-04-21 1990-04-17 Olin Corporation Process for the production of dinitrotoluene using an inorganic salt as a phase separation agent
US5099079A (en) * 1990-07-26 1992-03-24 Olin Corporation Process for separating acid from nitro substituted aromatics using a molten nitrate salt
US5099080A (en) * 1991-03-08 1992-03-24 Olin Corporation Process for preparing dinitrotoluene
US5245092A (en) * 1991-03-15 1993-09-14 Olin Corporation Process for preparing dinitrotoluene with low by-product content

Also Published As

Publication number Publication date
BR9306554A (en) 1998-09-15
EP0649400A4 (en) 1995-02-14
EP0649400A1 (en) 1995-04-26
AU4396393A (en) 1994-01-04
CA2138391A1 (en) 1993-12-23
KR950701903A (en) 1995-05-17
WO1993025503A1 (en) 1993-12-23
AU665843B2 (en) 1996-01-18
RU2106338C1 (en) 1998-03-10

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