Discovered and alchemical and posterior uses the presence of potassium the sulphuric alum acid was known to the alchemists. J.H. Pott and A.S. Marggraf showed that alumina was another constituent. Pott in its Lithogeognosia proved that the precipitate obtained when an alkali is versed in an alum solution is completely different from lime and chalk, with which it had been confused by G.E. Stahl. Marggraf proved that alumina is one of the components of alum, but that this ground has the particular properties, and is one of the clay commun run ingredients.
It also proved that crystals of alum cannot be obtained by dissolving alumina in sulphuric acid and evaporating the solutions, but when an ammonia or potash solution is released in this liquid, it immediately deposits the perfect crystals of alum. Torbern Bergman also observed that the addition of potash or made ammonia the solution of alumina in sulphuric acid crystallizes, but that the same effect was not produced by the addition of soda or lime, and that potassium sulphate is frequently found out of alum.
Short-term uses in industry the alum was imported in England mainly of the Middle East, and, as from late...
To view and download this full PLR article, you must be logged in. Registration is completely free. Once you create your account, you will be able to browse, search & downlod from our PLR articles database of over "1,57,897+" on 1,000's of niches and 200+ categories without paying a penny. Click here to signup...
