id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
7981	Grasser, Georg	Synthetic Tannins, Their Synthesis, Industrial Production and Application			.txt	text/plain	40096	3470	60	acid solution as 1113-1322, Krafft [Footnote: _Ber._, 1899, 32, 1613.] acetic acid solution, yields purpurotannin (see below) [Footnote: sulphuric acid solution, Perkin and Nierenstein [Footnote: _Ibid._, violet-coloured sulphonic acid, soluble in water, is obtained, which, The partly neutralised substance in aqueous solution tans pelt gradually added, a dark coloured water-soluble condensation product is giving no precipitate with gelatine; on adding acetic acid the solution Anthracene heated with excess sulphuric acid yields the water-soluble sulphuric acid and formaldehyde, a condensation product is obtained condensation products of phenolsulphonic acids are used as tanning condensation products of phenolsulphonic acids are used as tanning phenolsulphonic acid and a dilute solution of formaldehyde, the pelt is possible with acetic acid, yields light brown coloured solutions, the non-tannins, derived from salts of sulphonic and sulphuric acids, again solution, when, if Neradol D be present, the salt of the colour acid phenolsulphonic acid, a water-soluble product results, exhibiting	./cache/7981.txt	./txt/7981.txt