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.:
Date of Patent:
Feb. 17, 2015
Filed:
Feb. 25, 2010
Subbarayappa Adimurthy, Bhavnagar, IN;
Gadde Ramachandraiah, Bhavnagar, IN;
Girdhar Joshi, Bhavnagar, IN;
Rajendra Patil, Bhavnagar, IN;
Maheshkumar Ramniklal Gandhi, Bhavnagar, IN;
Mallampati Subbareddy, Bhavnagar, IN;
Pratyush Maiti, Bhavnagar, IN;
Subbarayappa Adimurthy, Bhavnagar, IN;
Gadde Ramachandraiah, Bhavnagar, IN;
Girdhar Joshi, Bhavnagar, IN;
Rajendra Patil, Bhavnagar, IN;
Maheshkumar Ramniklal Gandhi, Bhavnagar, IN;
Mallampati Subbareddy, Bhavnagar, IN;
Pratyush Maiti, Bhavnagar, IN;
Council of Scientific and Industrial Research, New Delhi, IN;
Abstract
A highly pure 3,5-dibromo-4-hydroxybenzonitrile (bromoxynil) has been prepared in high yield from 4-hydroxybenzonitrile using eco-friendly brominating reagent comprising of 2:1 mole ratio of bromide to bromate salts in aqueous acidic medium without any catalyst under ambient conditions with no work up procedure. The product 3,5-dibromo-4-hydroxybenzonitrile was obtained in 91-99% yield with melting point 189-191° C. and more than 99% purity by gas chromatographic analysis without any purification.