US1114278A - Treating rosin. - Google Patents

Description

ED sTArQP- TENT I or nori. f

FRANK E. MARINER, F GULL POINT, FLOR-IDA, ASSIGNOR- TO THE PENSACOLA TAR &

TURPENTINE COMPANY, or GULL POINT,

FLOR-IDA, A CORPORATION OF FLOR-IDA.

Tan-Arms ROSIN.

No Drawing.

T 0!] Z whom it may concern Be it known that I, FRANK E. MARINER, acitizen oi? the United States, residing at Gull 1oint,.in the county of Escambia and State of Florida, have invented a neW and useful Improvement in Treating Rosin. of which the following is a specification.

My invention relates to an improved treatment of frosin, or colophony, meaning the residue obtained by distilling turpentine and from which the turpentine is thus separated. for the purpose of obtaining a prodnot, which may properly be termed a rosinoid because of its physical resemvalue rarely exceeds per cent. This acid content of rosin oil, which is the portion of the latter that combines with the milk of lime to produce the rosin soap for setting the grease. is generally understood to be -abietic acid, notwitl'istanding the fact,that the rosin, from which the rosin oilyis produced, and which is approximately all abietic acid, will 'not properly set grease,

nor does it have necessary lubricating qualities. 'It Would therefore seem that 1n producing rosinoil by, distilling rosin, a. re-

arrangement of its molecular .structure .takes place, due to thefnery. mater al decomposition brought about by the heat; and

that in the course of this re-arrangement the 'saponifying agent therein, believed to be abietic acid, contained in the resultant rosin" oil is rendered agreasersehthough the cent, it follows-that the, remaining per,

precisefmol'ecular structure of this, agent is not known. It j being .Zevident, ,therefore, that the only alue of rosin oilas a grease set is in' itsacid-'content-ofabout 45 per cent-,or thereabouhpf neutraloil'is wasted;

I By distilling, under' a more or lesshigli vacuum, rosin irom which the Y turpentine has been thoroughly l -extracted by 'distilla;

Specification of Letters Patent.

Patented Oct. 20, 15 14:.

Application filed December 23, 1913. Serial No. 808,486.

ti'on, or with superheated steam, a peculiar distillate is produced which, as I have discovered, possesses superior grease-setting properties. By distilling-such resin in a vacuum of, say, 22 inches at a temperature. between 290 C. and 310- C. the distillate contains an acid value of approximately 90 per cept. and this constitutes approximately 90 per cent. of the rosin treated. This acid, which is apparently an isomer of abietic acid. is probably similar to the acid formed by distilling rosin at atmospheric pressure to ,produce ordinary rosin oil, containing only about 45 per cent. of acid value, as aforesaid. Consequently, about one-half the quantity of my rosinoid product will sufiice for the grease-setting purpose in the manufacture of lubricant greases that is required of regular first-run rosin oil.

If the rosin be distilled by the use of steam, the latter should preferably be not into'the rosin in thejstill through-a. perfo rated pipe or pipes; and the still may be additionally heated with externally-applied fire, which, however, is not necessary, but preferable because more economical, since it obviates the need of carrying highly superheated steam. Moreover, therosin can be heated in'the still to the comparatively-low boiling point essential to carrying it over only superheated, but should be conductedin the presence of steam, which then becomes superheated by contact with the mass of hot rosin; and the bulk' of the rosin may be dis tilled by a temperature of about 275 0., though the distillation starts at a much lower temperature, while at that specified.

the distillation proceeds rapidly and steadily and continues until most of the rosin has been distilled over 'in'the form of .this p eculiar article of rosi-n'oid. The last 8 to 1 0 per cent. of the rosin, however, re quires the temperature tobe raised somewhat to carry it even. Practically'all ofthe rosin may be distilled over by this method.

While the distiilate isthesame, Whether produced by the described practice in oamm or by the. use .of-superheated steam,'-of 0btainingi the .inolecular change of therosin necessary to convertthe abietic acid into my precin t; thereby to -enhance; its chemical action with milk oflinie manufacturing grease,

at being 'less' expensive inthe mat difierences from the ordinary rosin-product I of turpentine-distillation, in being susce reduced to the form of tent be lower than 80 tible of chewing like chewing gum, and in remaining solid at ordinary temperatures. To possess this last-named characteristic the abietic acid content should be at least about 80 per cent. However, by agitating it while it is cooling after distillation, whereby it is crystals, it will remain solid at ordinary atmospheric temperatures even though the abietic acid conper cent, and this particularly, if from 1 to 2 per cent. of water be added to it While undergoing agitation, to promote the crystallization. This property of remaining solid at ordinary temperatures affords the advantage of enabling my improved article to be transported, like rosin, in slack cooperage without material or undesirable change in its condition, while rosin oil requires to be shipped in tight and more expensive packages.

' What I claim'as new by Letters Patent is l. The process which consists in distilling over rosin, from which the turpentine has previously been separated,

and desire to secure 1 at a temperature.

below its boiling point at atmospheric pressure, condensing the distillate, and continu-. ing the distillation until substantially all the rosin has been distilled over, whereby a grease-set high in abietic-acid content is produced. I

v 2. The process which consists in distilling over, with superheated steam, rosin, from which the turpentine has previously been separated, condensing the distillate, and continuing the distillation until substantially all the rosin has been distilled over, whereby a grease-set high in abietic-acid content is produced.

3. The process which consists in over, with superheated steam at a temperature of about 275 C., rosin, from which the turpentine has previously been separated, raising the temperature of the steam to complete the distillation of substantially all the rosin, and condensing the distillate, whereby a grease-set high in abietic-acid content is produced.

4. As a grease-set for lubricant greases, the distillate of rosin having an abietic-acid content of over 65 per cent.

FRANK E. MARINER.

I In presence of A. C. FISCHER, F. A. FLORLLL.