METHYL 4-HYDROXYBENZOATE POTASSIUM synthesis

Yield:-

Reaction Conditions:

with potassium hydroxide in water;

Steps:

6 EXAMPLE 6

EXAMPLE 6 304.4 g of methyl 4-hydroxybenzoate were suspended in 740 ml of water and dissolved at 20° C. by adding 142 ml of 50% strength potassium hydroxide solution in the course of 20 minutes. Neutralisation was completed (pH 12.1) with a further 6 ml of the 50% strength potassium hydroxide solution. Spray-drying gave the pure-white potassium salt of methyl 4-hydroxybenzoate with a 4-hydroxybenzoic acid content of 0.2% by weight and a water content of 0.1% by weight.

References:

US4276431,1981,A