US1282407A - Apparatus for extracting soluble substances. - Google Patents

Description

W. E. GAHRIGUES.

APPARATUS FOR EXTRACTING soLUBLE SUBSTANCES.

APPLICATION FILED OCT. 3.1'9I4 Patented Oct. 22, 1918.

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APPARATUS FOR EXTRACTING SOLUBLE SUBSTANCES.

APPLICATION FILED ocT. a. 1917.

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WILLIAM E. GARRIGUES, OF NEW ORLEANS, LOUISIANA, ASSIGNOR TO WILLIAM GARRIGUEc COMPANY, INC., OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

Specification of Letters Patent.

Patented Oct. 22, 1918.

Application led October 3, 1917. Serial No. 194.479.

To all whom t may concern Be it known that I. VILLIAM 4E. GAiuu- GUEs', a citizen of the United States, residing at New Orleans, in the parish of Orleans and State of Louisiana, have invented certain new and useful Improvements in Apparatus for Extracting Soluble Substances, of which the following is a specification.

My invention relates to apparatus for extracting soluble substances, such as grease, from various materials containing the same, by means of suitable solvents, -such, for example, as gasolene or naphtha, and recovering the solvent.

In theprocess, practised in my apparatus the material containing the soluble substance and the solvent are first agitated together and the solvent with the dissolved substance drawn oif as fully as possible. This may be accomplished, for example, in a horizontal rotary extractor, running the solvent in at one end and drawing oit' the solution at the other end, through a filter, until the soluble substance is all withdrawn. A draw-off pipe may then be connected to the bottom ofthe extractor and a' considerable proportion of the remaining solvent therein drawn off.

In such an operation, a certain amount of the solvent remains within the mass of material, caught between the particles thereof and adhering thereto. My invention recovers this residue by introducing hot gas,

such as steam, entirely within the mass of material, While thoroughly agitating the masa andat the saine time providing a v`connection for carrying oli' the hot gas or steam with the solvent volatilized by the heat thereof. This operation may be carried out in a horizontal rotary extractor by rotating the same. and connecting it exially to a condenser and vacuum-pump, while at the same time introducing steam into the mass of material in the vessel. This may be done, for example, by the provision of a plurality of perforated steampipes withinA the extractor and a valve so'constructed to alwaysdelivei steam into the lower pipes,

also be located within the extractor, to obtain the best results, to prevent condensation of the steam in the mass of material.

In order that my invention may be more a horizontal rotary extractor, such as that' 'illustrated at 1, which may be provided with peripheral rails 2 and 3, which rest in contact with rollers, such 4, 4 and 5, the extractorha'ving a driving gear which meshes with a driving pinion 7. Suitable manholes and covers therefor, S, are provided foifilling the extractor, and a suitable screen is provided at one end, -which may comprise a perforated plate with a brass wire screen and filter-cloth, illustrated, generally, at 9, retained by means of, a suit-able retaining ring 10. An cud nienibcr 11 is provided beyond the screen. having an axial opening therein. to which is connected a pipe 12 provided with a valve, such as the gate-valve 13 shown. The pipe 12 is connected, through a stuffing-box indicated at 14, to a connection 15 provided with a valve, such as the gate-valve 1G, leading to a condenser, and, when soine types of condenser are used, to a vacuum pump.

-A suitable' draw-ofi' connection is indi-y cated at 17, having a coupling 18 adapted to be connected to a nipple 19 provided with a valve 19, and connected to the lower portion of the space 20fbetween the screen 9 and end 11 of the extractor when the latter is not rotating. Connection 17 may be connected through a T 21 to a still (not shown) for the naphtha or other solventnsed. A connection 22, provided with la valve 23, may also be provided, extending from T 21 tothe condenser connection 15.

The solvent may be introduced axially into the extractor atdthc opposite end of the apparatus through a pipe 24: provided With valve 24', T 25 and pipe 25. This pipe 25 extends a short distance within the end closure 26 of the extractor and is surrounded by a valve construction comprising an inner cylindrical member 27 secured to pipe 25 at its outer end by a bushing 28, which may be screwed on the pipe. At the other end of member 27, a radially extending, portion 29 is secured to pipe 25', as by a threadedconnection, an annular space 30 being provided about pipe 25 between bushing 28 and the opposite end closure 29 of member- 27.

An outer casting or member 31 lsurrounds member 27 and is provided with lugs A32 secured to the end member 26 of thecxtractor to rotate therewith. Rotation between members 27 and 31 may be provided for by a suitable'gland 33, secured to outer valvemember 31 and provided with a suitable packing 34.

Suitablev hot gas, such-as steam, may be introduced through pipe 35, provided with a valve 36, into the space 30. A plurality of perforated pipes 37' are provided with in the extractor, for distributing this hot gas within the mass'of material in that portion of the extractor which is lowcrmost at any moment. Pipes 37 of any suitable number, such as six, extend longitudinally through. the extractor at suitably spaced intervals and may be secured in position by means of U-bolts 38 extending about the pipes and secured to L-irons 39 lnounted on the interior of drum 1. At the'endrot'the extractor adjacent the rotary valve, pipes 37 are bent radially as shown at 37 and screwed through radial pipe taps in the outer member 31 of the valve.

The inner or stationary member 27 of the valve is cut away for a short distance axially thereof, at its lower portion, as shown in Fig. 3, to provide a steam or hot gas space 40, the lower wall otl which is formed by the interior ot' the' rotary valve-member 31 and the outer walls ot which are formed by radii of a circle making; an ang-le with each other which is preferably less than 180 degrees. Pipes 37 connect with space 4() when they are at the bottom ot' the drum, and are cut oil" therefrom when 'they are in the upper portion of the drum.

A -serie's of closed heating' pipes is also preferably mounted within the extractor and may comprise a plurality of longitudinal pipes 41 connected at the 'end distant from the rotary valve to a circular pipe 42. At the opposite end', pipes 41 are bent radially inwardly,- as shown at 41'., and are tapped .through the outer memberl 3 1 of the valve to constantly connect, by meansof an an-y nular space 43, withfthe steam space 30 of the valve. At .return pipe 42. extends from,

i'pe 42 out through pipe 25', and, it de cred, through v a suitable stuing-box, as

shown. A.

The operationv of the described apparatus I vvalves 13 and 23 closed, and as much of the solvent drawn off through pipe 17 and T 21as possible. Coupling 18 is now disconnected, the extractor again rotated, valve 36 opened to permit steam to How into pipes 37 and 41, and valves 13 and 16 opened. Steam now flows through the perforations in the pipes 37 which are for the moment lowermost, into the mass of material at 'the bottom of the extractor, those pipes 37, which are for the moment located in the open space above the mass of material, not delivering any steam into such space. The closed system of pipes 141-42 will also be filled with steam and thereby heated, preventing the condensation of the steam in the material. The constant turning over or agitation of the material permits the permea- K tion of the entire mass by the steam and the occur it this empty space were uselessly filled V with steam. Another effect of this arrangement is also to be observed, namely, that dis charging' the steam or hot gas within the mass ot material only, causes the vapor pressure within the mass to be greater than-that in the space unoccupied b v the mass, so that the gas, with the velatilized solvent .and any particles of the same which may remain liquid. entrained therein, will rapidly rise from the mass and escape through connection 12.

1t will be noted that myinvention is not limited to the details of mechanism described, but that the same is as broad as is indicated by the accompanying claims. The chief point of novelty in my described process, carried out by apparatus of the character. described may be considered broadly as "consisting in removing thelast portion of. the solvent, which it is impossible to Y wat .are .f 11.3@

and producing a condition of Vapor pressure within the mass greater than that in the space above the same. In the following claims, the term hot gas will be used to indicate-steam and its equivalents. Other points of novelty consist in a continuous operation of extraction in a horizontal rotary extractor. fresh solvent continuously flowing in duringl the rotation and solution continuously being drawn off through a vertical filter. The filter cloth is kept clean by the rotation, and the steam and vapor-'are screened as well as the liquid, thereby preventing the carryiingr over of any solid material to pipe 12. The use of a. horizontal rotating drum has manifold advantages over a vertical extractor, including economy of power, the possibility of using a drum as long as is desired, ete.

lVhat I claim is:

l. Extracting apparatus comprising a horizontal rotary drum, spaced perforated pipes secured therein extending lengthwise thereof and radially at one end, a valve at said end having an inlet or solvent therethrough, a stationary member mounted about said inlet and having an interior spice, Opeliing through the exterior of the member at one portionthereof,a gasinlet connected to said space and an outer member secured to said drum to rotate therewith, surrounding said stationary member` and having the ends of said pipes extend therethrough, said pipes being adapted to open into 4said space when in the rotation of the drum they occupy the lower portion of the drum, and to cut oli' therefrom when they occupy the upper portion of the drum.

Extracting apparatus comprising a horizontal rotary drum, spaced perforated pipes secured therein extending lengthwise thereof and radially at one end, a v valve at said end having a stationary member provided with an interior space, opening` through the exterior at one portion thereof,

an inlet pipe connected with said space,

and a member secured to the drum to rotate therewith, adapted to cover the said opening in the stationary member, the ends of said pipes extending at spaced intervals through said rotatable member, and registering with said opening when said pipes occupy the lower portion of the drum, and cut oft therefrom when they occupy the upper portion of the drum.

2:3. Extracting apparatus comprising a horizontal rotary drum, spaced perforated pipes and a series of closed pipes secured therein, and a valve at one end of the drum, comprising a stationary and a rotary inember, provided with an interior space havin? an inlet pipe connected therewith, said closed pipes being connected to said valve to always open into said space, and said perforattal pipes being connected to said valve to open into said space only when they occupy the lower portion of the drum, during the rotation thereof.

4. Extracting apparatus comprising a horizontal rotary drum, spaced perforated pipes secured therein, and a valve at one end of the drum` comprising a stationary and a rotary member, provided with an in? terior space having an inlet pipe connected therewith. said perforated pipes being connect-ed to said valve. to open into said space only when they occupy the lower portion of the drum, during the rotation thereof.

llxtracting,r appa atus comprising a horizontal rotary drum having at one end a connection for introducingsolvent, and means for introducing hot gas during the rotation of the drum, only within that portion ot the drinn which is at any/moment lowermost, and having at the other end an axially connected outlet.

o. Extracting apparatus comprising a horizontal rotary drum having at one end a connection for introducing solvent, and means for introducing hot gas, during the rotation of the drum, only within that p0rtion of, the drun which is at any moment lower-most, ano` having adjacent the other end a filter, extending transversely of the drain and secured thereto, and beyond the filter an axially connected outlet.

This specification signed and witnessed this 25th day of September, 1917.

iVlLLlAlt/l E. GAREGUES. lVitnesses Dvnn SMrrH, l. McIN'rosH.

It is hmby @mmm @mr in Lower@ Patent N. 1,282,407, granted october-2 2,

1918, upon tho pplioato'n of 'William E. Gorriguos, of New Orleans, Louisiana,

for an improvement in Appamtus for Extracting Soluble Substances, an error appears in. the printed 'opooication frequirir'xg correction as follows: Pogo 3, line 25, claim 1,.for the Word or read for; and that the said-Letters Patent should lo@ lroad with this correction therein that the eamo may conform to the record of the omo' in @he Potont Uco. l

Signori mol @sealed this 24th day of December, A. D., 1918a F. W. H. CLAY,

Acting Commissioner of Paten2s.

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