It can be prepared by distilling a mixture of dry calcium benzoate and acetate, Ca(O2CC6H5)2 + (CH3CO2)2Ca = 2CaCO3 + 2 C6H5CO.CH3, or by condensing benzene with acetyl chloride in the presence of anhydrous aluminium chloride (C. Friedel and J.
An alternative method consists in converting it into ethyl benzoate by shaking with benzoyl chloride and caustic soda.
It may also be prepared by oxidizing benzyl alcohol with concentrated nitric acid; by distilling a mixture of calcium benzoate and calcium formate; by the condensation of chlor-oxalic ester with benzene in the presence of aluminium chloride, the ester of the ketonic acid formed being then hydrolysed and the resulting acid distilled: C 6 H 6 +Cl CO Cooc 2 H 5 = C,H5co COOC2H5d-HC1, C 6 H 5 CO 000H =C6H5CHO+C02; by the action of anhydrous hydrocyanic acid and hydrochloric acid on benzene, an aldime being formed as an intermediate product: C 6 H 6 +HCN+HC1= C6H5CH :NH HC1, Benzaldine hydrochloride C 6 H 5 CH: NH HC1+H 2 O =NH4C1+C6H5CHO; and by the action of chromium oxychloride on toluene dissolved in carbon bisulphide (A.
It is made commercially by boiling benzotrichloride (obtained from toluene) with milk of lime, the calcium benzoate so obtained being then decomposed by hydrochloric acid 2C 6 H 5 CC1 3 +4Ca(OH) 2 = (C6H6000)2Ca-1-3CaC12+4H20.
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