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.
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This information has been left in for historical purposes but should not be acted upon.
Home › Fixed Oils And Fats › Benzoated Lard
Benzoated Lard
Take benzoin in coarse powder, 1 ounce; fresh lard, 1 pound. Heat together for 2 or 3 hours in a water-bath, and then strain.
1522. Το Bleach Lard. Lard may be bleached by applying a mixture of bichromate oil. Of this mixture add 4 ounces to each 1523. Το Bleach and Harden Tallow. gallon of fat or ointment while warm. The In a copper boiler, put 1/2 gallon water, and 100 proportion of the solution of benzoin may be pounds rendered tallow; melt over a slow increased for pomades, as it forms, by its aro- fire, and add, while stirring, 1 pound of oil of matic odor, an excellent basis for perfumes. vitriol, previously diluted with 12 of water; The benzoatic fat should not be kept in tin, afterwards, 1/2 pound bichromate of potassa, in but in well-covered jars. Steam-rendered powder; and lastly, 13 pints water, after lard, or that treated with salt and alum, which the fire is suffered to go down, when should be carefully re-melted in a water-bath, the tallow will collect on the surface of the to allow all the water to settle so as to pour dark green liquid, from which it is separated. off the pure fat. In preparing ointment and It is then of a fine white, slightly greenish pomades it is important that the wax should color, and possesses a considerable degree of be first melted, and the oil or fat warmed hardness. (See No. 1509.) before adding to the wax. This precaution, 1524. which will save much time and trouble, is often neglected by young beginners. (See ous cake stearine, 20 parts; potato starch, Nos. 1253 and 1254.) 5 parts; mucilage, 1 part. Melt the first three Factitious or Imitation Sper- White spermaceti, 10 parts; sonor-
1517. Boillot's Process for Purify- and unite well, then let the mass cool to the ing Fats. Melt 24 pounds avoirdupois of consistence of dough; turn it out on an oiled the fat with 2 quarts lime-water; stir actively over the fire for 2 or 3 hours, and cool. Then press in flannel and allow it to stand a day or two to harden. By melting it with marble or lead slab, and roll it into a cake; next sprinkle a little mucilage on it, double it, and roll again; repeat the process as often as required; lastly allow it to cool. If it has PETROLEUM, OR CRUDE COAL OIL been properly managed, it will flake when it is next heated by means of a coil of steam broken up, and resemble spermaceti.