US644872A - Apparatus for making extracts. - Google Patents

Description

No. 644,872. Patented Mar. 6, [900. E. SCHLIEMANN &. E. VON BDYEN.

APPARATUS FOR MAKING EXTRACTS.

(Application filed May 5,.1898.)

2 Sheets-Sheet i.

(No Model.)

No. 644,872. Patented Mar. 6, I900. E. SCHLIEMANN &. E. VON BDYEN. APPARATUS FOR MAKING EXTRACTSM (Application filed ma 5, 1598. (No Model.)

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ERNST SCHLIEllIANN AND EDGAR VON BOYEN, OF HAMBURG, GERMANY.

APPARATUS FOR MAKING EXTRACTS.

SPECIFICATION forming part of Letters Patent No. 644,872, dated March 6, 1900. Application filed May 5, 1898. Serial No. 679,780. (No model.)

we have applied for patents in England, No.

6,430, dated March 16, 1898; in Austria, dated February 21, 1898; in'Hungary, No. 2,591, dated February 23, 1898; inRussia, No. 4,000, dated February 19, 1898; in France, No.

362,308, dated January 31, 1898; in Belgium,

No. 104,518, dated February26, 1898; in Italy, dated February 24, 1898; in Spain, dated February 26, 1898, and in Portugal, dated March 5, 1898,) of which the following is a specification.

This invention relates to an apparatus for continuous extraction in which, as in the method adopted with lixiviatingtanks used in the manufacture of soda, fresh extracting medium is caused to enter that tank in which the material under treatment is almost completely exhausted and during its passage through the apparatus to become gradually more and more enriched or laden with extract until it leaves the last of such tanks, when it is entirely saturated.

To renderourinvention readily understood, we have annexed a sheet 'of drawings, in which Figure 1 is a vertical section of our uniform improved apparatus, and Fig. 2 a plan. Fig. 3 is a fragmentary side elevation of the extracting apparatus looking from the left. Fig. 4 is a like View of the said apparatus, but looking from the right. Fig. 5 is a horizontal section taken through the extracting apparawe on the line M N of Fig. 1, and Fig. 6 is a front elevation of one of the doors used in connection with each chamber of the apparatus.

The said apparatus consists, essentially, of a number of receptacles or chambers a to a arranged columnwise and each closed airtight by a doorJ, securely supported by a cross-bar J and tightening-screws J In these chambers are located tanks b. to 19 in which are placed the materials to be treatedsuch, for instance, as ceresin, petroleum residue, bones, offal, or other fatty substances. These tanks are supported on angle-irons so arranged as to leave a space between the bot tom of the tank and that of the chamber to allow for the flowing out of the extract. The solvent or menstruum is introduced either in a gaseous or in a liquid form by means of the pipe D, which extends along the column and is connected by branch pipes orsupply connections provided with cocks 'r, with perforatedserpentines or coils d to d arranged above the tanks 1) to Z).

The extract flows through the perforated bottoms c to 0 of the tanks into the pipes or delivery connections f to f and passes through suitable piping or connections,capabio of being closed by cock .2, into the inlet portion 6 of the serpentine 61 below. The pipes f to f are each provided with a testcock 7.0, from which samples can be drawn off when desired to test the working of the extracting process. All the draw-off pipes f to f can be put into communication with one another by means of a pipe G. In connection through the cooks s with the pipes cl to 01 for the solvent is a pipe P, up which the extract rises, the pipe leading upwardly from the delivery connectionfof the lowest tank, so as to enable extract to be returned into any one of the serpentines. The solution on leaving the first chamber enters the serpentine of the second chamber and passes through the perforations of the respective coil into the material under treatment, from which it takes up more fat or the like and then passes into the serpentine in the third chamber through a similar branch pipe in the pipe D, and so on until the saturated extract finally enters the distilling apparatus A B, one or the other of which is alternately at work.

In connection with the pipes d to (Z is a third pipe X, provided with cocks t for supplying steam to the exhausted residue in the tank on the closing of the cooks in the pipes P and D, the latter of which supplies the solvent. The steam, together with any remaining solvent and traces of fat or oil, escapes through the pipe G by closing the cooks and opening the cock w and enters the distilling apparatus, so preventing loss both of solvent and of extract.

To start the extracting process, the cocks w on the pipe G and the steam-supply pipe X, as well as the valves 0" for supplying benzene or the like, are closed, but the uppermost valve 1 is left open. The vaporized solvent such as benzene, benzole, naphtha, carbon bisulfid, sulfid chlorid, ether, and alcoholsupplied from a heater (not shown) presses through the top valve 0" into the serpentine d, and thence into the freshly-charged tank I), from which it escapes after having absorbed the extract through the pipe (1, cock 2, and inlet 8 into the lower perforated serpentine (I and so on. lhus it is obvious that while the firs ttank b is completely exhausted by the incoming vapor of benzene or the like the material in the last tank b will be only slightly acted upon by the already-enriched solvent. On it being ascertained by taking samples from the cock w that the first tank I) is completely exhausted the second tank 19 becomes the first, the cocks being then reversed and the exhausted tank Z) disconnected for the purpose of being refilled with fresh material. The vapor of solvent now enters direct into the second tank, and after passing out from the last tank D the now enriched solvent flows through the pipe P into the first tank h before entering the distilling apparatus Prior to discharging the exhausted tank it is, as above described, freed by steam from the last traces of solvent and extract, which are driven out through the pipe Ginto the second distilling apparatus.

By means of this improved apparatus the complete exhaustion of the material under treatment can be effected in the shortest possible time and with the smallest possible quantity of solvent. Also by its arrangement losses which have hitherto been unavoidable even with the best constructed extracting ap paratus are avoided.

Each tank when completely exhausted can at once be disconnected and need not, as heretofore, be kept in communication with the solvent until all the other tanks are completely exhausted one after the other.

Obviously this apparatus can be used with any appropriate solvent, and it can likewise be employed for extracting mineral oil and fatty substances, as well as for extracting other substancesforinstance, the principal constituents for certain drugs.

What we claim, and desire to secure byLetters Patent of the United States, is-

An apparatus for continuous extraction consisting of a series of closed receptacles constituting chambers and arranged columnwise, a tank in each chamber provided with a perforated bottom and supported so as to have a free space between the bottom of the tank and that of the chamber, a supply-pipe for supplying the extracting liquid, perforated serpentines above said tanks, supply connections, including cocks, from the said supply-pipe to the said serpentines, a delivery-pipe and delivery connections, including cocks, leading to said delivery-pipe from the spaces between the tank and chamber bottoms, and adapted to draw off the extract, connections, including cocks, from the delivery-pipe connections of each chamber to the serpentine in the next chamber below, testcocks in the respective delivery connections, a pipe leading upwardly from the delivery connection of the lowest tank, connections, including cocks, from said pipe to the supplypipe connections of the respective tanks, and a steam-supply pipe and connections, including cocks, leading therefrom to the said supply connections, substantially as and for the purpose set forth.

In testimony whereof we have hereunto set our hands in the presence of two Witnesses.

ERNST SCHLIEMANN. EDGAR VON BOYEN.

\Vitnesses:

GUSTAV HUBER, E. H. L. MUMMENHOFF.

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