| abstract |
1425343 Phthalic acid derivatives UNILEVER Ltd 12 Feb 1973 [14 Feb 1972] 26598/75 Divided out of 1425342 Heading C2C The invention comprises a phthalic acid derivative of formula wherein R is an alkyl or alkenyl group containing from 10 to 20 carbon atoms, and n is 0 or 1, a hydroxyl group may be present in the benzene ring or the group R; or an alkali metal, ammonium or substituted ammonium salt or the anhydride thereof. These compounds may be prepared by the oxidation of an alkyl oxylene in the presence of a bromide catalyst, or by the reaction of a C 10-20 acyl chloride with a hydroxy phthalic acid. |