US1963489A - Stabilized petroleum wax - Google Patents
Stabilized petroleum wax Download PDFInfo
- Publication number
- US1963489A US1963489A US595226A US59522632A US1963489A US 1963489 A US1963489 A US 1963489A US 595226 A US595226 A US 595226A US 59522632 A US59522632 A US 59522632A US 1963489 A US1963489 A US 1963489A
- Authority
- US
- United States
- Prior art keywords
- wax
- disulphide
- petroleum wax
- oxidation
- disulphides
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000012169 petroleum derived wax Substances 0.000 title description 8
- 235000019381 petroleum wax Nutrition 0.000 title description 8
- 239000001993 wax Substances 0.000 description 10
- 230000003647 oxidation Effects 0.000 description 9
- 238000007254 oxidation reaction Methods 0.000 description 9
- GVPWHKZIJBODOX-UHFFFAOYSA-N dibenzyl disulfide Chemical compound C=1C=CC=CC=1CSSCC1=CC=CC=C1 GVPWHKZIJBODOX-UHFFFAOYSA-N 0.000 description 8
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- 239000003112 inhibitor Substances 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- MPYGLNNTOXLWOB-UHFFFAOYSA-N 3-methyl-1-(3-methylbutyldisulfanyl)butane Chemical compound CC(C)CCSSCCC(C)C MPYGLNNTOXLWOB-UHFFFAOYSA-N 0.000 description 1
- CUDSBWGCGSUXDB-UHFFFAOYSA-N Dibutyl disulfide Chemical compound CCCCSSCCCC CUDSBWGCGSUXDB-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- -1 are preferable Chemical compound 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- ALVPFGSHPUPROW-UHFFFAOYSA-N dipropyl disulfide Chemical compound CCCSSCCC ALVPFGSHPUPROW-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G73/00—Recovery or refining of mineral waxes, e.g. montan wax
- C10G73/02—Recovery of petroleum waxes from hydrocarbon oils; Dewaxing of hydrocarbon oils
- C10G73/06—Recovery of petroleum waxes from hydrocarbon oils; Dewaxing of hydrocarbon oils with the use of solvents
Definitions
- This invention relates to the production of petroleum waxes, such as refined paraflin wax, which are relatively resistant to oxidation by the atmosphere when maintained at temperatures above the melting point.
- the efl'ect of the addition is shown by an accelerated test performed upon a refined petroleum wax melting at approximately 50 C. In this test each sample was maintained at a temperature of 120 C. for ninety-six hours, while oxygen gas was bubbled slowly through the melted wax. The acid content was then determined in terms of milligrams of potassium hydroxide required to neutralize one gram of the wax. In the case of the wax alone, the measure of acidity was 37.2 milligrams.
- the effects of the addition of various disulphides is shown in the following table, showing, in each case, the name and the amount of the disulphide and the corresponding acidity:
- dibenzyl disulphide has the further advantage of being particularly effective in inhibiting oxidation.
Landscapes
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
s'rmznn PETROLEUM wax Everett W. Fuller and Bertrand W. Story, Woodbury, N. 3., assignors to Vacuum Oil Company,
Ina, New York, N. Y
' York a corporation of New No Drawing. Application February 25, 1932,
Serial No. 595,226
3 Claims.
This invention relates to the production of petroleum waxes, such as refined paraflin wax, which are relatively resistant to oxidation by the atmosphere when maintained at temperatures above the melting point.
In the use of parafiin wax for the purpose of impregnating paper and other materials, it is customary to keep the wax at a temperature substantially above its melting point, and in contact with the atmosphere. It has been found that ordinary wax, particularly when highly refined, deteriorates rapidly under these conditions, owing to oxidation and the formation of acidic bodies. We have found, however, that such oxidation may be so far prevented or retarded, by the addition to the wax of a small quantity of certain organic disulphides, as to prevent substantial deterioration under ordinary conditions of use.
In our application for Letters Patent of the United States filed June 10, 1931, Serial No. 543,- 396, we have disclosed the fact that organic disulphides in general have an oxidation inhibiting effect on highly refined petroleum oils, such as transformer oil and lubricating oil. In the case of the petroleum waxes, however, we have found that a similar eflect is not produced, to a practically useful degree, by all of the organic disulphides, but that it is a useful characteristic of the dialkyl disulphides. The present invention accordingly resides in the addition, to a petroleum wax, of a relatively small amount, in theorder of .01% to 20% of the weight of the wax, of a dialkyl disulphide, for the purpose and with the result of stabilizing the wax against oxidation.
The efl'ect of the addition is shown by an accelerated test performed upon a refined petroleum wax melting at approximately 50 C. In this test each sample was maintained at a temperature of 120 C. for ninety-six hours, while oxygen gas was bubbled slowly through the melted wax. The acid content was then determined in terms of milligrams of potassium hydroxide required to neutralize one gram of the wax. In the case of the wax alone, the measure of acidity was 37.2 milligrams. The effects of the addition of various disulphides is shown in the following table, showing, in each case, the name and the amount of the disulphide and the corresponding acidity:
1 .05% di-iso-amyl disulphide .05 .05% di-n-butyl disulphide .07 .05% di-n-propyl disulphide .07 .05% dibenzyl disulphide .03 .01% dibenzyl disulphide .00
Larger amounts of the disulphides may be used .with somewhat increased effectiveness, but they are unnecessary for most purposes, since the amounts stated reduce the acid formation to a practically negligible quantity.
Where a high temperature is to be used the less volatile disulphides, such as dibenzyl disulphide, are preferable, and dibenzyl disulphide has the further advantage of being particularly effective in inhibiting oxidation.
The invention claimed is:
1. The combination, with a petroleum wax, of a relatively small amount of dibenzyl disulphide, as an inhibitor of oxidation.
2. The combination, with a petroleum wax, of a relatively small amount of an oxidation inhibitor comprising a dialkyl disulphide.
3. The combination, with a petroleum wax, of a relatively small amount of an oxidation inhibitor comprising one or more of the dialkyl disulphides:
di-iso-amyl disulphide, di-n-butyl disulphide, di-
n-propyl disulphide and dibenzyl disulphide.
EVERETT w. FULLER. BER'IRAND w. STORY.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US595226A US1963489A (en) | 1932-02-25 | 1932-02-25 | Stabilized petroleum wax |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US595226A US1963489A (en) | 1932-02-25 | 1932-02-25 | Stabilized petroleum wax |
Publications (1)
Publication Number | Publication Date |
---|---|
US1963489A true US1963489A (en) | 1934-06-19 |
Family
ID=24382317
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US595226A Expired - Lifetime US1963489A (en) | 1932-02-25 | 1932-02-25 | Stabilized petroleum wax |
Country Status (1)
Country | Link |
---|---|
US (1) | US1963489A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2636861A (en) * | 1950-06-09 | 1953-04-28 | Shell Dev | Hydraulic fluid |
US4320018A (en) * | 1978-05-30 | 1982-03-16 | Texaco Inc. | Synthetic aircraft turbine oil |
-
1932
- 1932-02-25 US US595226A patent/US1963489A/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2636861A (en) * | 1950-06-09 | 1953-04-28 | Shell Dev | Hydraulic fluid |
US4320018A (en) * | 1978-05-30 | 1982-03-16 | Texaco Inc. | Synthetic aircraft turbine oil |
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