Patent · US Expired

Method for the preparation of halogenated benzonitriles

US7576233B2 · kind B2 · utility

2Cited by

2References

16Claims

0Family size

Assignee

Tessenderlo Chemie S.A. · BE

Inventors

Andreas Martin · Salzburg, AT
Venkata Kalevaru · Hyderabad, IN
Bernhard Lucke · Berlin, DE
Dirk Van Deynse · Tessenderlo, BE
Marc BELMANS · Tessenderlo, BE
Frank Boers · Tessenderlo, BE

Key dates

Filing date	Jun 3, 2003
Grant date	Aug 18, 2009
Priority date	—
Expiry date	Jan 23, 2025

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01J2523/00
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The present invention relates to a method for preparing halogenated benzonitriles by vapor phase ammoxidation at a reaction temperature in the range of 300 to 500° C. in a fixed bed reactor using a three-component catalyst. More particularly, the method of the invention relates to a method for preparing 2,6-dichlorobenzonitrile (2,6-DCBN) from 2,6-dichlorotoluene (2,6-DCT) by vapor phase ammoxidation. The invention also relates to a three-component catalyst provided on a carrier and its use in a vapor phase ammoxidation reaction according to the invention. In addition, the invention provides a method for preparing the three-component catalyst.

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