Patent · US Active

Continuous process for the manufacture of nitrobenzene

US7763759B2 · kind B2 · utility

8Cited by

7References

5Claims

0Family size

Assignee

Bayer MaterialScience AG · DE

Inventors

Thomas Knauf · Dormagen, DE
Alexandre Racoes · Krefeld, DE
Wolfgang Dohmen · Duisburg, DE
Andreas Rausch · Regensburg, DE

Key dates

Filing date	Sep 21, 2009
Grant date	Jul 27, 2010
Priority date	—
Expiry date	Sep 21, 2029

Classification

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

Abstract

The invention relates to a continuous process for the manufacture of nitrobenzene. This process comprises the nitration of benzene with nitrating acid that contains at least 3.0 wt. % of nitric acid and at least 67.0 wt. % of sulfuric acid, in a reaction space in which the start temperature of the reaction is above 100.0° C. but below 102.0° C. In addition, this process requires that the benzene and the nitrating acid are dispersed in one another several times.

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