Patent GB-190226963-A (GB)
Title: Improved Method of Circulating or Applying a Liquid under Pressure, applicable for the Leaching or Extraction of Mineral or Organic Substances, the Extraction of Fatty or Greasy Substances, the Dyeing and other Treatment of Textile Materials, and to other Useful Purposes, and Means or Apparatus for the Application of the said Method.
Inventor: DUMONS JEAN PIERRE LOUIS
Filed: 1902-12-06
Granted: 1903-12-05
Abstract: 26,963. Dumons, J. P. L. Dec. 6. Extracts.-Relates to a method of and means for circulating or applying a liquid under pressure, applicable for the leaching or extrading of mineral or organic substances, the preparation of extracts from fatty, greasy, or other substances, &c, The substance to be treated is contained in one or more vessels C, and the liquid for treating it in two similar vessels A, B. Air, gas, steam, or the like under pressure is passed through a four-way valve D to the vessel A or B alternately, and the liquid therein passed through the pipe a or b to the bottom or top of the vessel or vessels C. To start the process, the substance to be treated is placed in the vessel or vessels C, the total capacity of which is equal to that of one of the vessels A, B, while the latter are filled with the treating liquid. The valve D is then turned to admit pressure to the top of the vessel A, driving out the liquid through the pipe a to the vessel C, the air in the latter escaping through the valve r. When the vessel or vessels C is or are completely filled with liquid, the valve r is shut, and the valve D is altered so that pressure is applied to the top of the vessel B, while the vessel A is opened to the atmosphere, whereby the liquid in the vessel B is driven through the pipe b to the top of the vessel C, and the liquid already therein is driven back into the vessel A. When the vessel B has been emptied, the valve D is again turned to admit pressure to the vessel A, this alternation being repeated as often as required. In each vessel C the pipe from A enters at the bottom beneath a distributing-box, from which proceed a number of tubes leading to perforated vertical tubes, symmetrically arranged within the chamber, upon which bobbins may be placed. The pipe b from the vessel B has a number of symmetricallyarranged branches opening near the top of the vessel C. Instead of the above-described arrangement of inlet tubes within the vessels C, tubes such as are shown in Fig. 13 may be used, whereby the pipes a<2>, b<2> leading from the vessels A, B both enter at the bottom of the vessel, the former communicating with an annular space between two tubes b<1>, a', the outer of which is perforated, while the latter communicates with the inner tube, the top part only of which is perforated. To cause the liquids to pass as required automatically, each vessel A, B is provided with a vertical rod k, Fig. 3, having a nut q at the bottom, and a heavy plate o, p mounted freely on the rod. The rod is connected by chains m, n to a pulley mounted on an extension of the plug of the valve D, on which plug is fixed a lever I, while loosely mounted thereon is a weighted arm g, having a tappet. When the liquid in one of the vessels falls sufficiently for the plate o or p to be more or less unsupported by the liquid, the plate pulls its rod downwards, and the motion is carried to the extension of the valve plug. The weighted lever is raised by a pin cast on the pulley, but after passing the perpendicular it falls suddenly and, its tappet striking the lever I, causes the valve to change quickly and completely, and direct the gas in the other direction. To cause the liquid always to enter at the bottom and leave at the top of the vessels C, the latter are arranged at a higher level than the vessels A, B, and a second valve, similar to D and connected therewith by levers and a link, is arranged with suitable connections between the vessels A, B, and C. The treating-liquid may be charged automatically from a hopper M by rotating, by a step-by-step motion from the rise and fall of the rod k, a feeder consisting of a cylindrical plug having a number of peripheral recesses, e.g. six, adapted to hold and subsequently deliver into the vessel a definite quantity of the material. The vessels A, B may be provided with heating-coils E.