Important: Safety Warning
This page describes trade processes that use dangerously toxic materials such as cyanide solutions, mercury amalgams, or strong acids. These processes require training, equipment, and precautions far beyond what the text describes.
This information has been left in for historical purposes but should not be acted upon.
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Nitro-Muriatic Acid
regia. This is used in the arts, chiefly as a the distillatory and condensing apparatus. 3884. Gregory's Method of Obtain- tion will be finished. The water is increased ing Pure Muriatic Acid. Put into a ma- in bulk, and converted into hydrochloric tass 6 parts, by weight, of purified salt, and 19 ounces oil of vitriol previously diluted with 4 of water, and cooled. Fix in the matrass a tube twice bent at right angles and having a bulb blown on the descending limb.
Into a bottle surrounded with ice and water introduce distilled water equal in weight to the salt employed, and let the bent tube dip 1/80 of an inch into the water. Apply a gentle acid of 1.14 or 1.15 specific gravity. To procure it of 1.21 specific gravity, employ part of this acid during the first half of a similar operation, and it will be speedily saturated.
Phillips says a perfectly colorless acid may be obtained from the commercial sulphuric acid and common salt.