This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1807 Excerpt: ...with any combustible substance, but becomes fused into coloured frits with metallic oxids. Its specific gravity is 2. It is employed in a multitude of arts. METHOD OF OBTAINING ALUMINE. Take any quantity of alum of commerce, dissolve it in six parts of boiling distilled water, and add to this solution, when cold, ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1807 Excerpt: ...with any combustible substance, but becomes fused into coloured frits with metallic oxids. Its specific gravity is 2. It is employed in a multitude of arts. METHOD OF OBTAINING ALUMINE. Take any quantity of alum of commerce, dissolve it in six parts of boiling distilled water, and add to this solution, when cold, liquid ammonia, till no further precipitate ensues. Then heat the whole nearly to the boiling point for a few minutes, and transfer it on a filter. In proportion as the fluid passes off, pour more water over the precipitate till it passes tasteless. Let the precipitate obtained, while yet in a pasty state, be transferred into a glass or Wedgwood's bason, and add to it muriatic acid in small quantities at a time, until the whole is dissolved. Then evaporate the solution, till a drop of it, when suffered to cool on a plate of glass, yields minute crystals: on letting it now cool, crystals of alum will be deposited. Remove these crystals by decanting the fluid, and renew the evaporation, until, on further cooling, no more crystals are formed. Nothing now but pure alumine remains in the solution; the fluid may therefore be decomposed by adding to it gradually liquid ammonia till no further precipitate ensues. The precipitate thus obtained, when well washed and dried, is pure alumine. Remark.--The process recommended, in general, by systematic writers for obtaining alumine differs from this; it consists in decomposing a solution of alum of commerce by an excess of a carbonated alcali, washing the obtained precipitate, and exposing it to a sufficient heat to drive off the carbonic acid. This method, however, is imperfect for if the alumine thus obtained be heated with charcoal, and a diluted acid is added to the mixture, sulphurated hidrogen gas will be ...
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Add this copy of System of Theoretical and Practical Chemistry... to cart. $54.79, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2011 by Nabu Press.