US1136994A - Process of removing rosin and turpentine from resinous woods. - Google Patents

Description

RENEWED FEB. 10,1915.

APPLICATION FILED MAY II, 1912.

Patented Apr. 27, 1915.

5 H van 01 are interposed between WILLIAM M. BASHLIN, OF GROVE CITY, PENNSYLVANIA.

manned.

Specification of Iietters Iatent.

Patented Apr. 27, 1915'.

Application filed May 11, 1912, Serial No. 696,747. Renewed February 10, 1915. Serial No. 7,371.

To all whom it may concern Be it known that 1, WILLIAM M. BAsHLIN, a citizen of the United States, residing. at Grove City, in the county of Mercer and State of Pennsylvania, have invented new and useful Improvements in the Process of Removing Rosin and Turpentine from Resinous Woods, of which the following. is a specification.

This invention relates to the process of removing turpentine and rosin from resinous woods and consists in therein as will be hereinafter fully described and pointed out in the claims.

Ihave shown an apparatus for carrying out my process in an March 29th, 1912, Serial Number 687,085. This apparatus is illustrated in the accompanying drawings and consists in an inner shell 1 which is preferably cylindrical in form and is closed at top and bottom by suitable heads 2 and 3, one of these heads, the head 2 in the present instance, being preferably provided with a dome 4 which is covered by a tight-fitting lid 5, the latter being held in position by a suitable clamp 6. One side of the retort is also preferably provided with a manhole '1 which may be conveniently located toward the bottom of the retort and communicates with the interior thereof. This manhole is covered by a'tight fitting lid 8 which may also be held in position by a clamp 9. The retort is practically in'closedby an outer jacket 10 which forms a heating space or chamber 11 which is adapted to receive which may be connected to any suitable source of steam supply such, for example, as the steam pipe 13. The bottom of the retort contains a support for the charge of wood and this support, according to the present invention, serves'also as a filter or strainer. In the present instance, the support embodies a suitable number of superposed v plates 14 which are foraminous or formed with perforationsl 5, these perforations in the plates being preferably staggeredor offset, as shown. A sheet of fabric 16 of appropriate character is preferably arranged at the under side of the uppermost foraminous plate and sheets v of woven wire mesh 17 top and bottom plates. This structure just described is suitably supported in the lower portion of the retort, for example, by an internal flange or ledge 18 and the plates and certain improvements application filed by me steamthrough a pipe 12 thereto both the middle and the the mesh are maintained in proper spaced relation by suitable means such, for example, as the rings 19. A residuum chamber 20 is formed in the bottom of the retort below the support just described, and an outlet 21 is provided for drawing oil the residuum. The residuum chamber .20 contains piping which is preferably in the form of a coil 22 having vents or orifices 23, this coil being connected by a. pipe 24: to receive the steam supply pipe 13 whereby steam may be admitted to the coil 22 and this steam may be projected from the vents or orifices 23 therein through the charge support and filter. An outlet 25 also extends through the bottom or lower portion of the retort and serves to withdraw the solvent or liquid therefrom, this outlet being shown provided with a strainer head 26 and a blower 27 may be arranged in cooperative relation with the strainer head, the blower being connected by a pipe 28 to the steam pipe 24 and steam may be admitted to the blower under the control of a valve 29 .whereby the accumulation of any substance on the strainer head tending to clog the same can be removed when necessary. The outlet pipe 25 for the solvent preferably leads to a suitable circulating pump 30 and the discharge side of this pump is connectedby a pipe 31 to the inlet 32 of the present instance being formed with numerous downwardly directed vents or orifices 34 through which the solvent may be distributed evenly over the charge contained in the retort. a

That portion of the retort between the lower and upper coils 22 and 33 contains means for heating the interior of a charge or body of wood contained inthe retort whereby all portions of the charge may be heated uniformly by the application of heat exteriorly and interiorly.

eating means of different kinds may be used for applying heat interiorly to the charge. In-the present instance, an imperforate helical heating coil 35 is shown and this coil may receive steam at an appropriate temperature through the pipes 36 and 37 i quently the heating effect or temperature of the coil may be regulated as conditions may require. Means 1s also provided for inthese pipes in the present instanceradiating from the centerof-the retort and provided with vents or orifices 42 through which the steam is discharged and, distributes uniformly within the body of the charge.

. may

3 the The manifolds and the distributing pipes may also serve as means for distributing the solvent throughout the body of the charge and to accomplish these results, a pipe 43 be used which leads to the manifolds and this pipe is connected to and may receive steam from the supply pipe 13 under the control of a suitable valve 44, and

, pipe 43 is also solvent circulating pump 30 and may receive solvent therefrom under the control of a valve 45. When the valve 45 is closed and the valve 44 is opened, steam from the pipe 13- is admitted to the manifolds 40 and is discharged eyenly-throughout the body of the charge through the perforated distributing pipes 41. By closingthe steam valve 44 and opening thevalve 45, t 'e solvent may be caused to enter the manifolds 40 and discharge directly into the mass through the distributing pipes. A pipe 46 leads from the dome 4 and is preferably connected to a suitable vacuum pump whereby a pressure below atmospheric pressure may be maintained within the retort during the treatment of each charge. A pipe 47 also leads from-the dome 4 and may serve to convey away and condense such gases as may accumulate in the dome. These gases may be withdrawn by any suitable exhaust device, an

shown in the present instance and the nozzle 49 thereof may receive steam from the steam pipe 13, as shown. In order to condense and thereby prevent high pressure of any gases that may accumulate in the upper portion of the retort, due to hydrocarbons native to the .wood and the hydrocorbons in 50 may be used, that shown in the present instance being adapted to receive water or other cooling medium throu'ghtheinlet pipe from the coil may discharge through the outlet 52. Gage glasses 53 and 54 may be provided for indicating I the level of the liquid in the upper and lower portions of the retort, and a safety valve 55 may be provided to prevent the development of excess pressure in the retort. Steam may also be introduced by we of the coil 33, pipe 31, valve 31, portion 0 pipe-25, valve 45, pipe 45, valve 44, the valve 25*bemg closed. In carrying out'my process, I preferably connected to the.

ejector 48 being the combined action of the.

the solvent, a cooling coil subject the chips in the retort to the following steps: The'retort being filled, the chips chamberll and coil 35. A solvent, preferably the solvent described in my application filed Nov.-10th, 1911 #659,634 may be used which solvent is made up 'of 80%'deodorized benzin and 20% wood tur entine; With my process. I maintain the love of the body of solvent at the bottom of the retort near the bottom of the chips and spray the top of the chips with the solvent allowing it to percolate down through the chips. In this way, the solvent is continuously moving taking up the rosins and oils in this movement and at the same time, the chips are not subjected to the pressure that would be incident to submerging them in the solvent. The process may be made more efficient by re ducing the pressure subjected duringthis washing process by putting the retort under a vacuum throu h any-convenient apparatus as by way of tie pipe'46. Where this is done, the chips are not only free from any presence of the solvent itself but, of course, are subjected to the reduced pressure incident -to' the partial. vacuum. At the same time, the solvent is kept in nearly as intimate a contact with the different parts of the chips as though the chips were submerged and the continued movement of the solvent carries the products from the chips with it to the bottom where it can be taken off. The gases exhausted in reducing the pressure in the retort are condensed and utilized. This process not only has the advantage of the greater efficiency as before described but it involves the use of a very small amount of solvent compared with the process where the chips are submerged. This being so, the after treatment 0 ferent'products is very much simplified. In the carrying-out of this process ordinarily the solvent may be circulated for sometime, by way of the pipe 25, pump 30, pipe 31 32, 33 and nozzles-34. This ma be continued until the solvent has attaine such richness as to interfere with its efliciency when it may be thrown off for treatment and the fresh solvent introduced. After the products have been extracted from the'chips as far as can be done by the washing process heretofore described, the solvent is drawn from the retort and the-chips are subjected to a current of steam.

to which the chips are this solvent to take out the dif:

. boiling temperature.

bottom a liquid of the pipe 33.

inseam.

heavier oils. subject the chips to currents ofsteam or heating medium and to reverse the direction of the movement so as to take up the lighter oils in one .direction take up the heavier oils when applied in the opposite direction. 0

In carrying out this. process with the apparatus described, I first turn on the steam through the pipe 24, and nozzles 23 allowing the steam to pass upwardly and discharge, it through the pipe 47. This How of steam may be augmented by way of the pipe 43, distributing pipes 4'0 and 41 and nozzles 42. This would pick up the lighter oils. Steam may then bezintroducedby way of the pipe 31 and 32 and nozzles 34 discharg-' ing by way of the pipe 21. This would take up the heavier oils with greater efficiency than where the flow of steam is upwardly. With the flow of steam in either direction, the supply may be augmented by the' in troof the pipe 43'via duction of steam by wa pipe 40, distributing pipes 41 and nozzles 42. Steam from this system will follow the direction of the discharge. ing process alternated as ordinarily remains in the terial that may be saved. tract this final troduce to the described there chips some ma- In order to exproduct from the chips, I inretort preferably from the heavier than the solvent and the products, preferably water, at orv about a This water as it rises in the retort picks up the remaining solution made up of the solvent and the products and carries them upwardly with them through the body of the chips and the richer portions of this product so picked up may be drawn ofl at the top of the retort by way The amount ofi' can be observed and the process continued until the products drawn ofi? are practically free from the solution. The retort is then emptied, the water being drawn off to a storage for re-use so that the same water is used each time and in this way any solution that may be maintainedby the water is finally reclaimed. After this the retort is discharged in .the usual manner; preferably through the opening 7 and recharged.

What I claim as new is 1. The process of removing rosin and turpentlne from resinous woods which consists in subjecting such wood to heat; extracting rosin and turpentine from the wood by the action of a percolating liquid solvent while maintaining the wood in an unsubmerged condition, the withdrawal of the solvent rich in extract, the application of steam in an upward direction to drive ofi' the residue of With my process I propose to and to more readily pentine After this steam of water drawn turpentine and the easily volatilized sub stances, from the wood, theapplication of direction, the applicasteam in a downward V tion of water at about the'boiling point, and

drawing off at the surface of the water the products separated from the wood .by the water.

' 2. The process of remoyingrosin and turpentine from resinous woods which consists in subjecting such wood. to a pressure below atmospheric. pressure,- extracting rosin and turpentine from the wood by the action of a percolating liquid solvent while maintaining the wood in an unsubmerged condition, the withdrawal of the solvent rich in extract, the application of steam'in an upward direction to drive off the residue of turpentine and the easily-volatilized substances from the wood, the application of steam in a downward direction, the application of Water at about the boiling .point, and drawing off at the surface ofthe water the products separated from the wood by the water.

3. The process of removing rosin and turfrom resinous woods which consists in subjecting such wood to heat and a pressure below atmospheric pressure; extracting the rosin and turpentine from the wood by the action of a percolating liquid solvent while maintaining the wood in an unsubmerged condition, the withdrawal of the solvent'rich in extract, the application of steam in an upward direction to drive 01f the residue of turpentine and the easily volatilized substances from the wood, the application of steam in a downward direction, the application of water at about the boiling point, and drawing 011 at the surface of the water the products separated from the wood unsubmerged condition.

5. The process of removingji'osin and turpcntine from resinous woods wh1ch consists in subjecting the wood to heat at a pressure.

below atmospheric pressure and extracting the rosin and turpentine by a percolating liquid solvent while maintaining the wood 1n an unsubmerged condition. I

In testimony whereof I have hereunto set my hand in the witnesses. Y

WILIAM M. BASHLIN.

Witnesses:

E. B. HANHAW, Louisa Smears.

presence of two subscribing.

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