US2828248A - Production of petroleum jelly - Google Patents

Description

r' v 2,828,248 Ice Patented Mar. 255 1958 PRODUCTION OF PETROLEUM JELLY Claims priority, application Great Britain December 30, 1953' 3 Claims. (Cl. 196-449) This invention relates to the production of petroleum jelly.

At the present time, petroleum jelly is largely obtained as the residue remaining after the distillation of substantially non-asphaltic crude oils. The principal object of the present invention is to enable satisfactory petroleum jellies to be prepared from asphaltic crude oils.

It has been found that this object may beachieved by blending together certain oil components and certain oilwax mixtures, commonly referred to as slack waxes, that are obtained in the production of lubricating oils from petroleum.

According to the present invention, a petroleum jelly comprises. a mixture in approximately equal proportions of a residual oil (bright stock) having a viscosity index of not greater than 90, and preferably between 80 and 90, and a viscosity at 140 F. greater than 150 centistokes, and a slack wax derived from a residual oil (bright stock) having a penetration unworked of 50-90 mm./ 10, an oil content of O-%, and a congealing point of 148-170 F.

According to a further feature of the invention, the residual oil may be used in admixture with a distillate oil having a viscosity index of 65-80 and a viscosity at 140 F. of to 50 centistokes, the distillate oil constituting up to 70% of the mixture.

According to a still further feature of the invention, the residual oil slack wax may be used in admixture with a slack wax derived from a distillate oil boiling above 480 F., and having an oil content of O% and a congealing point of 125-150" F.

The invention will now be described with reference to the following examples. Throughout the examples, the following blending components were used.

BRIGHT STOCK OIL S. G. 60/60 F 0.9255 Kinematic viscosity 140 F cs 176.1 Viscosity index 85 DISTILLATE OIL S. G. 60/60 F 0.916

Kinematic viscosity 140 F cs 39.72

1 Institute of Petroleum Test 1. P. 50/48.

2 DISTILLATE OIL SLACK WAX Congealing point F 134 Oil content percent wt... 23.7

Example 1 Blends containing equal proportions 'by' weight of the bright stock oil and various bright stock slack waxes had the following properties;v

TABLE 1' Penetration at 25 0. Change in Melting r Penetra- Slack WaxNo. 'Point of tionon Blend Un- Worked, Working, C. worked, mm./10 mm./10

mmL/lO' Example 2 Blends containing equal proportions by weight of the bright stock oil and the distillate oil, and various proportions of bright stock slack wax, had the following properties.

TABLE 2 v Penetration at 259 C. Change in Percent; Melting Penetra- Slack Wax Weight Point of tion on No. of Slack Blend, Un- Worked, Working,

Wax 0. Worked, mm./1O mm./10

mmJlO (Repeat Blend) 2 50 72 183 273 90 4 50 69 192 277 85 73 144 224 75 74 157 248 91 75 76 122 235 113 From a comparison of the data presented in Tables 1 and 2 it will be seen that when using bright stock slack wax No. 3, the blend comprising a mixture of bright stock oil and distillate oil gave a considerably smaller change in penetration on working than the blend comprising only the bright stock oil.

Example 3 The following table shows the effect of prolonged working on two blends according to the invention as compared with a petroleum jelly at present on the market.

The following table gives the properties of two jellies consisting of a blend of bright stock slack wax, distillate oil slack wax, bright stock oil, and distillate oil.

TABLE 4 Un- Worked Melting worked Penetra- Change Composition Point, Penetration at in pene- 0. tion at 25 0., tration, 25 0., mm./10 rum/l mm./

Bilggot Stock Slack Wax No, Distillate ()iTiYWk" 20% wt 203 247 44 Distillate Oil, 25% Wt.-- Bright Stock Oil, 25% Wt---. Bright Stock Slack Wax No.

4, 34% Wt Di2s6till%$% Oil Slack Wax, 6&0 172 220 48 Distil1ate 6il 2 (l% 'v'v'III II 7 Bright Stock Oil, 20% Wt.

Distillate Oil Slack Wax, 50%

Wt Granular composition w1th little resem- Distillate Oil, 25% Wt blance to petroleum elly, Bright Stock Oil, 25% Win--- It will be seen from the data presented in Table 4, that blends comprising both bright stock and d istillate oil slack waxes, and both bright stock and distillate oils gave the least change in penetration on working;

:We claim:

1. A petroleum jelly consisting of a mixture of a residual oil (bright stock) having a viscosity index of 80 to 90 and a viscosity at 140 F. greater than 150 centistokes,

a distillate oil having a viscosity index of 65 to 80 and 480 F., and having an oil content of 0-40% and a congealing point of 125' to 150 F.,'the combined amounts of said residual and distillate oils amounting to between 40 and of the mixture.

2. A petroleum jelly consisting of a mixture of 25% of a residual oil (bright stock) having a viscosity index of 80 to 90 and a viscosity at 140 F. greater than 150 centistokes, 25% of a distillate oil having a viscosity index of to and a viscosity at 140 F. of 30 to 50 centistokes, 30% of a slack Wax derived from a residual oil (bright stock) having a penetration unworked of 50 to mm./l0, an oil content of 025%, anda congealing point of 148 to 170 F., and 20% of a slack wax derived from a distillate oil boiling above 480 F., and having an oil content of 0-40% and a congealing point of to 150 F.

3. A petroleum jelly consisting of a mixture of 20% of a residual oil (bright stock) having a viscosity index of 80 to 90 and a viscosity at F. greater than centistokes, 20% of a distillate oil having a viscosity index of-*65 to 80 and a viscosity at 140 F. of 30 to 50 centistokes, 34% of a slack wax derived from a residual oil (bright stocklhavingapenetration unworked of 50 to 90 mm./ 10, an oil content of 025%, and a congealing point of 143 to F., and 26% of a slack wax derived from a distillate oil boiling above 480'? F., and having an oil content 0f- 040% and a congealing point of 125 to 150 F.

1,920,161 Rosen,... a July 25, 1933 2,649,384 Anderson Aug. 18, 1953 2,661,318, MacLaren Dec. 1, 1953

Claims (1)

1. A PETROLEUM JELLY CONSISTING OF A MIXTURE OF A RESIDUAL OIL (BRIGHT STOCK) HAVING A VISCOSITY INDEX OF 80 TO 90 AND A VISCOSITY AT 140*F. GREATER THAN 150 CENTISTOCKES, A DISTILLATE OIL HAVING A VISCOSITY INDEX OF 65 TO 80 AND A VISCOSITY AT 140*F. OF 30 TO 50 CENTISTOCKES, A SLACK WAX DERIVED FROM A RESIDUAL OIL (BRIGHT STOCK) HAVING A PENETRATION UNWORKED OF 50 TO 90 MM./10, AN OIL CONTENT OF 0-25%, AND A CONGEALING POINT OF 148 TO 170*F., AND A SLACK WAX DERIVED FROM A DISTILLATE OIL BOILING ABOVE 480*F., AND HAVING AN OIL CONTENT OF 0-40% AND A CONGEALING POINT OF 125 TO 150*F., THE COMBINED AMOUNTS OF SAID RESIDUAL AND DISTILLATE OILS AMOUNTING TO BETWEEN 40 AND 50% OF THE MIXTURE.