PROCESS FOR THE PRODUCTION OF A MIXTURE OF 2,4,5-TRICHLOROPHENOXY ACETIC ACID AND 2,4-DICHLOROPHENOXY ACETIC ACID OR A MIXTURE OF THEIR ALKYL ESTERS

摘要

A process for the production of a mixture of 2, 4, 5-trichlorophenoxy acetic acid and 2, 4-dichlorphenoxy acetic acid or a mixture of their alkyl esters which comprises selective chlorination of 2, 5-dichlorophenoxy acetic acid or its alkyl esters in a mixture of 2, 5-dichlorophenoxy acetic acid and 2, 4-dichlorophenoxy acetic acid or a mixture of their alkyl esters with chlorine at a temperature of from 20 degree to 30 degree C.