Patent · US Active

Process for the nitration of O-xylene and related compounds

US8642781B2 · kind B2 · utility

0Cited by

8References

17Claims

0Family size

Assignee

E.I. DU PONT DE NEMOURS AND COMPANY · US

Inventors

David Richard Corbin · New Castle, US
Joachim C. Ritter · Wilmington, US
James Schultz · Lake Zurich, US
Sourav Kumar Sengupta · Wilmington, US
Katelyn Rae Walck · West Chester, US

Key dates

Filing date	Aug 27, 2010
Grant date	Feb 4, 2014
Priority date	—
Expiry date	Jan 11, 2031

Classification

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

Abstract

Aromatic compounds such as o-xylene are selectively nitrated by nitric acid in the presence of polyphosphoric acid and a large pore, acidic zeolite or a large pore, hydrophobic molecular sieve. This is an environmentally friendly, commercially viable, high conversion process for the selective nitration of aromatic compounds in the para position.

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