Methanol reacts with primary alkanethiols (R = C-1-C-3) over alumina c
atalysts to yield dialkyl sulfides. Methanethiol is completely convert
ed to dimethyl sulfide. Ethane- and 2-propanethiols give methyl alkyl
sulfides. However, the process is complicated by side reactions produc
ing olefins and dimethyl sulfide. If mixed thiols are used, their tran
sformations hinder each other.