The manufacture of intermediate products for dyes (1919)
Cain, John Cannell, 1871-1921 · London, Macmillan · leaf 191
INTERMEDIATE PRODUCTS FOR DYES 176 either from naphthalene direct or from naphthalene-/2-sulphonic acid, and consequently is accompanied by some of the 1:3:5- acid. The following scheme illustrates the above relationships : — S … NAPHTHALENE-! : S-DISULPHONIC ACID, Preparation from Naphthalene. — One hundred kilos, of fuming sulphuric acid (containing 23 per cent, of sulphur trioxide) are added gradually to 20 kilos, of naphthalene, the temperature being kept below 60° and the mixture stirred until all the naph- thalene has…
Dyes and dyeing -- Chemistry
Internet Archive · Gerstein - University of Toronto · Public domain (published before 1931). Free to use for anything.
