By the practice of this process, the inventor is enabled to obtain a purer extract than heretofore, and, at the same time, the substances acted upon are more free from noxious odors.
Changes may be made in the apparatus shown in Fig. 33, as, for instance, the vessel A may consist of a horizontal hollow cylinder, and the vaporizing of the hydrocarbon may be accomplished otherwise than by a steam-coil.
Fig. 34.
Adamson’s Method for Treating Substances with Liquid Hydrocarbon for the Purpose of Extracting Oils, Fats, etc. This invention relates to a method of treating animal and vegetable substances with liquid hydrocarbons, such as benzene, benzole, etc., for the purpose of extracting from such substances oils, fats, etc.
The object of this improvement is to prevent the fetid and other odors imparted to the liquid hydrocarbon by the substances treated from being recommunicated to the substances and to the extracts therefrom by the liquid hydrocarbon when re-used.
In Fig. 34, there is shown a sectional view of apparatus whereby this invention may be carried into effect.
A is a vessel into which the substances to be treated are introduced through a manhole, x, provided with a suitable detachable cover, and through an opening in the upper perforated diaphragm, B, a detachable perforated plate, b, being placed over the opening after the substances have been passed through the same, the substances being supported by the lower perforated diaphragm, B´, beneath which is a space for receiving the extract and liquid hydrocarbon after the latter has percolated through the mass in the vessel. The extract, which occupies the lowest position in the vessel, may be removed therefrom from time to time prior to being purified by distillation or otherwise. The liquid hydrocarbon is permitted to pass from time to time through a pipe, d, into a vessel, D, where it is met by jets of water from a pipe, f, the hydrocarbon and water being thoroughly agitated in the vessel by a revolving paddle-wheel, E. This washing of the liquid hydrocarbon may be accomplished by different appliances. For instance, the paddle-wheel may be dispensed with, and water forced upward into the vessel from below in the form of numerous small jets. The water and hydrocarbon after this washing operation are permitted to pass into the subsiding-vessel, H, the hydrocarbon being above and the water below, the fetid and other odors divided by the hydrocarbon from the substances in the vessel, A, having, during the washing operation, been transferred to the water, which may be drawn off from time to time.
The washed and purified hydrocarbon may be pumped directly through a pipe, m, into the vessel, A, to be re-used for treating the substances therein; or it may be pumped, first, into a reservoir, and permitted to flow from the same into the said vessel, A.