Abstract
Esters are very valuable chemicals used in the fragrance, flavour, pharmaceutical, dyestuff and plastic industries. Several synthetic routes exist to make esters, but the carboxylic acid–alcohol reaction is the most common for which homogeneous, polluting and corrosive acids are used as catalysts. Perfumery and flavour grade esters need to be free of inorganic impurities and colouration. The current work has evaluated the activity of ion exchange resin catalysts for the synthesis of methyl salicylate and methyl anthranilate, methyl-4-hydroxy benzoate from the respective carboxylic acid and methanol.
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