US8490A - Improvement in distilling acid and naphtha from rosin - Google Patents

Description

L. s. ROBBINS. 'DISTILLING AGIDS AND NAPHTHA FROM ROSIN.

No. 8,490. Patented Nov. 4, 1851.

after designate by the word still.

UNITED STATES PATENT OFFICE.

ILS. ROBBINS, 0F NEW YORK, N. Y.

IMPROVEMENT lN DISTILLING ACID AND NAPHTHA FROM ROSlN.

Soecification formingpart of Letters Patent Norfiflgili. dated. November A, 1851.

rosin, by which I amenable to produce therefrom, in a separate and distinct form, acid, I naphtha, and oil; and I do hereby declare that the following is a full and exact description thereof, reference being had to the 'accompa n'y'ing drawing, making a part of this specification.

A is the bodyof the sti1l,which I shallherein- B is a curved pipe connected with the top of the still;

. G, a movable jointof pipe f or connecting the curved still-neck B with the still-worm D. f

is a steam-pipe, which passes through a close' jointin the side of'the still, and thence is con ducted down the inner side and along the bottom of thes'ame to near the"center of the botom of the still, where it is curved into a circular form around the centerthereof 1 The annular terminating portion of the-said steampipe which surround sthe center of the bottom of the still is perforated with small holes for escape the steam a portion of the time during my improved process of distillation. A spiral or any other shape may begiven to the perforated terminating portion of the steampipef,which surrounds the center of the bottom of the still.

A thermometer must be so combined with the still as to indicate the temperature of whatever may be contained in the interior thereof.

I make use of Fahrenheits thermometer, and consequently all references to temperature in.

tained therein by blowing steam into it through the pipe f. Detach the still from its worm prior to making a fire under it, or before the fire has made much progress, by removing the connecting-pipe C from its place. for thereason that the rosin is violently agitated within the'still during'the early stages of raising its temperature, and'until all the acid and water is expelled therefrom, during which agitation the rosin is'liable to overflow, and should it be allowed .to overflow into the still-worm;

great injury would result therefrom, and an explosion of the still would probably im'mediately follow. The acid will immediately begin to escape from the neck of the still when the thermometer indicates the temperature of the rosin to be-(325)'three hundred and twen- 'ty-five degrees, at which time the fire under the still must be checked, and so regulated as to keep the temperature of the melted rosin therein somewhere between 300 and 325, until the acid shall cease to fiow'from the neck of the still. As soon as the flow of the acid from the neck of the" still ceases. the still must be connected to its worm by placingthe con- 'n'eetin'g-pipe G in its proper p'osition'and lut 'ing the joints at each extremity thereof; and

then steam must be steadily blown through the pipe f intothe bottom of the still, while the fire underthe same is so regulated as to keep the contents of the still at about thesame range of temperature that was required .to expel the acid therefrom, as before described. The steam, as it rises I through the melted matter in the still, takes up and carries with This said operahas been discharged, which will be indicated by the character of the discharge from the still-worm, and also can be ascertained by so graduating the receiving-vessel as to indicate when a quantity of naphtha about equal to fifteen per cent. in bulk of the rosin originally placed in the still has been discharged from the still-worm. as soon as the naphtha ceases .to flow from the still-worm, the fire must be increased under the still until the. contents thereof have been raised to a temperature of 550, the steam all the while being allowed to How 'ifio the still through the pipef, as in the preceding part of my improved process of distillation, and which flow of steam'into the still must be continued during all the remaining parts and divisions of my said process of distillation,which are hereinafter described. The

oil will commence passing off in the form of vapor from the contents of the still, mingled with thesteam blown into the same, when the temperature of said contents reach 550, and these two mingledvapors will pass into and be condensed in the still-worm, and thence be discharged into a suitable receiving-vessel. The temperature of 550, or thereabout, must be preserved within the still until the flow of oil from the still-worm nearly. or quite ceases, which will take place when a quantity of oil equal to about twenty-five per cent. of the rosin originally placed in the still has been discharged. 'Thecontents of the still must then be raised to a temperature of 600, when the flow of oil and water from the still-worm will recommence and continue,wh ile the said temperature of 600, or thereabout, is maintained within the still until a second quantity of oil about equal to twenty-five per cent. of the rosin originally placed in the same has been discharged from the still-worm,when the flow of oil will nearly or quite cease. The temperature within the still must then be raised to 650, or thereabout, when the flow of oil and water from the still-worm will recommen ce and continue, while the temperature within the still is retained at or about the said temperature of 650 until a third quantity of oil about equal to twelve and a half per cent. of the rosin originally placed in the still has been discharged,..

- stillafter extracting therefrom the acid, naphtha, and oil, by the before-described process, is'of anatnre similar to pitch, and is applicacable to similar purposes and uses. This renates in a perforated head or coil, h, in theupp er portion of the still, and which has not been before referredto, serves the following purpose, to wit: Steam is injected from this pipe into the volatilized oil during its passage from the still to the condensing-worm,which hasa purifying and partially-bleaching effect upon the v oil.

Having thusfully described my new and improved process of distilling rosin, what I claim therein as my. invention, and desire to secure by Letters Patent, 1s-'- 1. The process of separating the acid and water arising'from the decomposition of rosin at the temperature of 325 Fahrenheit, or th ereabout, by means of fire-heat, substantially in the manner herein set forth.

2. In combination with the above, the process of separating the naphtha from the other component parts of the rosin,by preserving the temperature of the liquid mass within the still at about the range of 325 Fahrenheit, as above stated, and injecting s eam into the same, by which I am enabled to throw off the naphtha at the same temperature employed for throw ing off the acid. I

3. I do not intend to limit myimproved process of distillation, as hereinbefore described,

to the production of oil from rosin, but shall employ it for redistilling the crude article known as rosin-oil.

LOUIS S. ROBBINS.

Witnesses:

Z. O. BoBBINs, J. S. BROWN.

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