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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 11834389 B1

PDFFull Text
Date of Patent:
Dec. 05, 2023

Filed:

May. 18, 2021

Synthesis of n-(2,4-dinitrophenyl)-4-nitrobenzamide (tnba) using solid acid catalysts

Applicant:

Dupont Safety & Construction, Inc., Wilmington, DE (US);

Inventors:

James A. Schultz, Swedesboro, NJ (US);

Sourav Kumar Sengupta, Wilmington, DE (US);

Venkateswara Rao Surisetty, Moseley, VA (US);

Assignee:

DUPONT SAFETY & CONSTRUCTION, INC., Wilmington, DE (US);

Attorney:
Primary Examiner:

Sudhakar Katakam

Assistant Examiner:

Jennifer C Sawyer

Int. Cl.
CPC ...
C07C 231/14 (2006.01); B01J 8/02 (2006.01); B01J 19/14 (2006.01); B01J 21/16 (2006.01); B01J 29/70 (2006.01); B01J 39/20 (2006.01);
U.S. Cl.
CPC ...
C07C 231/14 (2013.01); B01J 8/02 (2013.01); B01J 19/14 (2013.01); B01J 21/16 (2013.01); B01J 29/7007 (2013.01); B01J 39/20 (2013.01); B01J 2219/00051 (2013.01);
Abstract

A method of making N-(2,4-dinitrophenyl)-4-nitrobenzamide from a mixture of 2,4-dinitroaniline, 4-nitrobenzoyl chloride, and solid acid catalyst in an organic solvent, wherein the solid acid catalyst is not soluble in the organic solvent, the solid acid catalyst being an acidic clay, an ion exchange resin, a beta zeolite, a sulfonated tetrafluoroethylene-based fluoropolymer-copolymer, or some mixture of these.

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Schultz, James. (2023). Synthesis of n-(2,4-dinitrophenyl)-4-nitrobenzamide (tnba) using solid acid catalysts (U.S. Patent No. 11834389). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/11834389

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