US1767076A - Lubricant and method of producing the same - Google Patents

Description

Patented June 24, 1930 UNITED STATES PATENT OFFICE RUSH NICHOLAS J'ARMAN, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO LINDSAY- MCMILLAN COMPANY, A CORPORATION OF WISCONSIN LUBRICANT AND METHOD OF PRODUCING THE SAME No Drawing.

The invention relates to an improved lubricant and the method of producing the same. 4

The object of the invention is to so treat 5 petroleum lubricating oils having paraffin bases as to reduce-the cold test thereof so that heavier oils, which contain a better body and are better lubricants, can be used in cold Weather without becoming too stifi and solid for practical purposes.

By my invention I am able to take petroleum lubricatin oils having parflin bases, such as are usable for lubricating automobiles or other machinery and reduce the cold test thereof, for example, Mid-continent or Pennsylvania petroleum oil and similar paraffin oils, having a viscosity test of two hundred seconds at one hundred degrees F. Saybolt Universal Viscosimeter and a cold test of thirty-five degrees F. and reduce the cold test to zero F. without affecting the lubricating or other qualities of the oil. In carrying out my invention I take degras of any suitable kind, including American degras, and make a zinc degras soap therefrom. Degras, as is well known, contains a mixture of fats made from various fatty acids, and I may make this soap directly by boiling zinc oxide (ZnO) and the degras together until completely saponified, or I may make it indirectly. In the latter case I take degras and make a sodium soap therefrom with sodium hydroxide (Nz OH) and this soap is then dissolved in water, zinc sulphate (ZnSO in solution added thereto and the mixture may then be heated to hasten the action, although heating is not necessary. The zinc replaces the sodium with the result that I get a zinc soap and sodium sulphate (NfigSO the-latter being soluble and easily washed out, leaving the resultant waterinsoluble zinc degras soap.

In either case I obtain a product of zinc degras soap which when added to the petroleum lubricating oil having a paraffin base I desire to treat reduces the cold testthereof.

For practical commercial purposes I dissolve the soap so made in a small amount of lubricating oil, generally a ten per cent solution, which I call my base. If now I de- Applieation filed February 7, 1927. Serial No. 166,593.

sire to reduce the cold test of a particular petroleum lubricating oil having a paraffin base, such as one of the examples given above, I mix it with some of this base, for example, ten per cent base and ninety per 5 cent of the lubricating oil, such as I have indicated, which gives a one per cent zinc degras soap solution. This one per cent of zinc degras soap will reduce the cold test in the case of a Mid-continent or Pennsylvania petroleum oil having a paraffin base of twohundred viscosity test at one hundred degrees Fahrenheit from thirty-five degrees F. down to zero F.

While I have described In invention in connection with two known ubricating petroleum oils having paraffin bases, having a cold test of thirty-five degrees F., it will be understood that the zinc degras soap may be used with other lubricating petroleum oils having paraffin bases or greases made from petroleum oils having paraffin bases to reduce the cold test thereof and hence I desire it to be understood that this invention is not to be limited to any specific oil or proportion of parts except as such limita tions are specified in the claims.

What I claim as my invention is:

1. As a new lubricant, a petroleum oil having a parafiin base and having a small so amount of zinc degras 'soap added thereto to reduce the cold test of said oil.

2. As a new base for treating petroleum lubricants having paraffin bases to reduce the cold test thereof, a petroleum lubricating oil having zinc degras soap added-thereto in an amount not to exceed'ten per cent of the mixture. i

In testimony whereof, I affix my signature.

RUSH NICHOLAS JARMAN.