US895800A - Process for the manufacture of brewers' pitch. - Google Patents

Description

, BEST AVAILABLE 1 which are consequently prejudicial for this ,7

onirnn s're'rss rsrsis'r cri ics;

LEOPOLD SCHMIED, 0F PRAGUE, AUSTRIAJiUNGARY.

rnoc sss son The irnuumoruns or BBEWERtB PITCH.

C OPY' To all whom it may concern:

Specification of Letters Potent. Application fled June 7, 1907. Serial No. 377,83.

Patented Aug. 11, 1908.

' 1 means not only is any carbonizetion avoided,

Beitlt'nownthatLLEoroLDSonnIencitizen but in addition the volatile constituents are of the Einpireof A'ust1'ia-Hr111gary, residin at Prague, Austrie-Hungary, have invented certain new and useful Improvelnentsin the Process for the Manufacture of Brewers Pitch, of which the following is a specific tion, reference being had therein to the accoinpanying drawing.

Theprcsent invention has for its object a process for the manufacture of brewers pitch by the dry distillation of colopho'ny,

in which, as fares possible, all constituents of the colophony which ere volatile 81) the pitching temperatures are driven ofl' while carefully maintaining low distillation ternperutures, whereupon the distillation residue is mixed with puraflin inthe well known manner. i

In order to obtain brewers itchwhich is utilizoble with the novel pitc ring methods in which temperatures exceeding 200 C; are

employed, it is known to free resinous products from the constituentsvolatile at these pitching temperatures by vigorous superheating. Owing; to the great, heat some carbonizetion, although only a little, takes place, which imparts a deep color to the residue. This is readily detected in all superheated pitches on the norket and in the mixtures made therefrom, as when dis solved these products leave a carbonaceous residue. I

Hitherto it has been held that the constituents of resin which in applying pitch at high temperatures become volatile and purpose, were not distilled over until at a temperature of 330 0. (temperature of the mess) andconsequently that the cerboni notion which sheets the flavor of the beer, was unavoidable; it was thought that it was precisely high decomposition temperatures which were necessary for obtaining it residue of good quality and that the pitch was favor ebly influenced by them, It hes, however, been found that the constituents exerting an unfavorable influence on the utilization as pitching medium distil o'ver lroi cololphony even. at low temperatures ii the disti lotion is carried out very slowly and so 113 to urolong itsdurntion while carefully avoiding superheating, that is to say the temperature is not ellowed to exceed 300-C. By this driven off far more effectually than heretor fore and the other pro oerties of the product are also favorably in uenced: for instance the residue in the still presents greater trectability so that smaller quantities of perailin need be added than to oolophony or superheated pitches. carried into practice by continuing the dry distillation of the colophony at temperatures The novel process is p of 230-300 C. until the loss of mutter caused by the distillation amounts to 16 whereupon it is melted with neutral paraffin or o similar hydrocarbon until a, homogeneous. vernishdihe.v mess is formed.

The rodu'ct by the above method shows it conchy aceou s'freoture and when dissolved does not leave a carbonaceous residue. cordingly, contrary to what is the ease. with all so erheeted pitches hitherto known, which eve o bitter taste caused by the our bonizetio'n', it .does not import any lever to beer and wort even in'e worm condition and without previous swilling of the cssks;

The coat of varnish produced by the epplication of the novel lite/hing medium is more resistant and dumb ethen the known cost of pitch, so that labor, time and meterielere economized; but even for each pitching much less pitching; medium is required then when superheated pitch is used. The costs are very thin and adhere well to iron and cement, so that the modern iron and cement fermenting vets may be coated with the var nish.

ascertained the notureof my said invention and in what nonner the seine is to bs per" formed, 1 declare that what i cla m is:

Y v Theresiduein the" still 1s then allowed to cool to 1()()-l.20 'Q,

Having now particularly described and i The herein described process of producing V v en entirely neutral pitch which consists f n sub ecting colophony, consisting of the resin of theconiferee which has been freed from ecetico'cid and turpentine oil by distillation, to dry distillation at e tern ereture not in excess of from 280 to 300 (1 until all con.-

its

stituents volatile at the pitching tumpeml ture have been driven oil and the loss caused i by distillation mnount to from 16 10 18 per cent. and melting the neutral tastelesz; resi due 5 which rmnaius with av neutral paralliniike E hyllromrliofi corresponding to the (lVSlI'PiI consistency of 11w pitch.

allixed my signature in presence. of two Wit- In testimony whereof I have hereunto