Patent · US Active

Synthesis of diaminodinitropyridine

US8115007B2 · kind B2 · utility

0Cited by

6References

11Claims

0Family size

Assignee

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

Inventors

Hasan Dindi · Wilmington, US
James Schultz · Lake Zurich, US

Key dates

Filing date	Nov 27, 2007
Grant date	Feb 14, 2012
Priority date	—
Expiry date	Oct 31, 2030

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G73/18
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A process for the preparation of diaminodinitropyridine or diaminodinitrobenzene by contacting an aminopyridine or aminobenzene with oleum and nitric acid, wherein the improvement comprises adding at least about 1% molar excess of nitric acid, based upon the aminopyridine or aminobenzene with stirring for at least two hours to form first the intermediate sulfonic acid, and then diaminodinitropyridine or diaminodinitrobenzene, and use of such products in the preparation of rigid rod polymers is disclosed.

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