The Chlorination Process
The Chlorination Process
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89 Precipitation becomes difficult when impurities are in the solution, such as lime and magnesium, which give bulky precipitates.* This can be obviated by the addition of acid, or by filtering through charcoal.
This latter process is carried on as a method for pre- venting the bulky precipitates formed by ferrous sulphate from mixing with the gold. Just what the reaction is between pulverized charcoal and trichlo- ride of gold is unintelligible, but the charcoal is certain to quickly decompose... it, and collect the gold in and upon its surface. If the lime, magnesium, or arsenic be fixed or held in solution by acid, they pass through at times without decomposition, but not always. In the latter case the utility of charcoal as a precipitant over ferrous sulphate is nothing — in fact, as it adds new complications, is a hindrance, and to be avoided. There may be more or less slimes as well which pass the filter : these collect mechanically upon the charcoal, and when burned with the charcoal form with the ash a mixture which requires consider- able extra work to get rid of; then, again, at times the lime and magnesium forming a precipitate as well give virtually a new gold ore, difficult to handle.
What to read after The Chlorination Process?
You can find similar books in the "Read Also" column, or choose other free books by E B Eugene Benjamin Wilson to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
89 Precipitation becomes difficult when impurities are in the solution, such as lime and magnesium, which give bulky precipitates.* This can be obviated by the addition of acid, or by filtering through charcoal.
This latter process is carried on as a method for pre- venting the bulky precipitates formed by ferrous sulphate from mixing with the gold. Just what the reaction is between pulverized charcoal and trichlo- ride of gold is unintelligible, but the charcoal is certain to quickly decompose... it, and collect the gold in and upon its surface. If the lime, magnesium, or arsenic be fixed or held in solution by acid, they pass through at times without decomposition, but not always. In the latter case the utility of charcoal as a precipitant over ferrous sulphate is nothing — in fact, as it adds new complications, is a hindrance, and to be avoided. There may be more or less slimes as well which pass the filter : these collect mechanically upon the charcoal, and when burned with the charcoal form with the ash a mixture which requires consider- able extra work to get rid of; then, again, at times the lime and magnesium forming a precipitate as well give virtually a new gold ore, difficult to handle.
What to read after The Chlorination Process?
You can find similar books in the "Read Also" column, or choose other free books by E B Eugene Benjamin Wilson to read onlineMoreLess
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