3,5-Dichlorobenzoic acid → 3,5-Dichlorobenzoic acid

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Reaction Steps

To 3000 g of water, 191 g (1 mole) of 3,5-dichlorobenzoic acid and 40 g (1 mole) of sodium hydroxide were added and dissolved in water with stirring. An aqueous solution with 56.6 g (0.51 mole) of calcium chloride dissolved in 500 g of water was then added dropwise to the first solution under stirring, thereby obtaining a precipitate having a white color. The thus-obtained precipitate was filtered, washed with water, dewatered and then dried under reduced pressure at room temperature to obtain calcium salt of 3,5-dichlorobenzoic acid as white fine powder. The calcium content of these salts was determined by ion chromatography and was found to be 9.7 wt. %. It was hence found that calcium di(3,5-dichlorobenzoate) accounted for about 100% of these salts.

Provenance & Evidence