Leblanc-process sentence example

leblanc-process
  • The term alkali is employed in a technical sense for the carbonate and hydrate (of sodium), but since in the Leblanc process the manufacture of sodium sulphate necessarily precedes that of the carbonate, we include this as well as the manufacture of hydrochloric acid which is inseparable from it.
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  • From that time onward the Leblanc process spread more and more, and for a considerable period nearly all the alkali of commerce was made by it.
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  • - For many years all the sulphur used in the Leblanc process in the shape of sodium sulphate, and originally imported into the manufacture in the shape of brimstone or pyrites, was wasted in the crude calcium sulphide remaining from the lixiviation of black-ash.
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  • The fuel required is less than half the amount used in the Leblanc process.
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  • The only way in which the Leblanc process could still hold its own was by being turned in the direction of making caustic soda, to which it lends itself more easily than the ammonia-soda process; but the latter has invaded even this field.
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  • One advantage, however, still remained to the Leblanc process.
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  • The Leblanc process thus remained the sole purveyor of chlorine in its active forms, and in this way the fact is accounted for that, at least in Great Britain, the Leblanc process still furnishes nearly half of all the alkali made, though in other countries its proportional share is very much less.
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  • As the weight of bleaching-powder consumed in the world is at most one-fifth of that of alkali, calculated as Na2C03, it follows that only about one-tenth of all the alkali required could be made by electrol y sis, even supposing the Leblanc process to be entirely abolished.
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  • As long as the operation of the Leblanc process is continued, it will supply a certain share of both kinds of products.
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  • It is chiefly obtained as a by-product in the manufacture of soda-ash by the Leblanc process (see Alkali Manufacture).
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  • (See Chlorine.) For all that, especially in consequence of the small amount of fuel required, and the total absence of the necessity of employing sulphur compounds as an intermediary, the ammonia-soda process has supplanted the Leblanc process almost entirely on the continent of Europe and to a great extent in Great Britain.
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