A study of the sulphonation of 2-methylnaphthalene
Abstract
All seven monosulphonic acids are formed in the sulphonation of 2-methylnaphthalene with 93% sulphuric acid. A rise in temperature results in a decrease in the proportion of the 1- and the 3-sulphonic acids, and (in the range 40–160°) of the 4- and the 8-acids, with a corresponding increase in the proportion of the 6- and 7-acids.