from The Century Dictionary.
- noun The operation or process of extracting alkaline salts from ashes by percolation of water; the process of leaching.
from the GNU version of the Collaborative International Dictionary of English.
- noun Lixiviating; the process of separating a soluble substance from one that is insoluble, by washing with some solvent, as water; leaching.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun The process of
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The other and more scientific methods of extracting the precious metal from its matrices, such as lixiviation or leaching, by means of solvents
The object of calcining or roasting certain ores before treatment is to dissipate the sulphur or sulphides of arsenic, antimony, lead, etc., which are inimical to treatment, whether by ordinary mercuric amalgamation or lixiviation.
After the oxidation is finished, the mass is taken from the furnace and cooled; the bichromate is obtained by lixiviation, treated with sulphuric acid and crystallized.
If, instead of chromate or bichromate of potash or soda, chromic acid is sought, the mass after lixiviation is treated with sulphuric acid, and the chromic acid is obtained directly without any intermediate steps.
The mass after lixiviation, being treated with a solution of sulphate or carbonate of potash or soda, will yield chromate of potash or soda, and by the employment of sulphuric acid, the corresponding bichromates.
Much also depends on the proportion of gold to the ton of rock under treatment, as the most scientific and perfect processes of lixiviation hitherto adopted will not pay, even when all other conditions are favourable, if the amount of gold is much under half an ounce to the ton and even then will leave but a very small profit.
The Pollok process is a newer, and stated to be a cheaper mode of lixiviation by chlorine.
The most scientific and perfect mode of gold extraction (when the conditions are favourable) is lixiviation by means of chlorine, potassium cyanide, or other aurous solvent, for by this means as much as
To begin with, they are roasted to get rid of the sulphur, arsenic, etc., which would interfere with the amalgamation or lixiviation, and then either ground to impalpable fineness in one of the many triturating pans with mercury, or treated by chlorine or potassium cyanide.
He employed a series of cylinders, arranged vertically, in which the wood was subjected to a methodical system of lixiviation.