Artificial dye-stuffs; their nature, manufacture, and uses (1917)
Ramsey, Albert R. J, Weston, H. Claude (Hubert Claude) · London, Routledge; New York, Dutton · leaf 32
tar remains in thesettling tanks until the ammoniacal liquor, with whichit is mixed, separates as an upper layer, which is thendrawn off, this separation being necessary before thetar is pumped to the tar-stills. The tar-still is an iron vessel set in brickwork andprovided with a concave bottom… … 18 COAL AND COAL-TAR still for running out the pitch remaining when thedistillation is complete, whilst mounted in the dome-top is a safety valve and a thermometer tube, steampipes being also led into the vessel terminating in anarrangement of jets at the bottom, the purpose of thesebeing to allow…
Dyes and dyeing
Internet Archive · Public Domain Mark 1.0. Free to use for anything.
