Oblon, Spivak, McClelland, Maier & Neustadt
Preparation of 2,4-dihydroxybenzoic acid
 2,4-Dihydroxybenzoic acid is prepared in a solids mixer by reacting resorcinol with an alkali metal bicarbonate and/or alklai metal carbonate in a carbon dioxide atmosphere using as the alkali metal bicarbonate or alkali metal carbonate a mixture of the corresponding sodium and potassium salts. 
BASF Aktiengesellschaft
C
C07C
inventional
Peter Ulrich
Neumann Eichenauer