Patent · US Expired

Process for the preparation of dinitrotoluene

US5345012A · kind A · utility

13Cited by

12References

5Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Thomas Schieb · Rösrath, DE
Gerhard Wiechers · Leverkusen, DE
Rudolf Sundermann · New Martinsville, US
Uwe J. Zarnack · Wittmund, DE

Key dates

Filing date	Nov 3, 1993
Grant date	Sep 6, 1994
Priority date	—
Expiry date	Nov 3, 2013

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C201/08
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.