US2795532A - Refining heavy mineral oil fractions with an anhydrous mixture of sodium hydroxide and potassium hydroxide - Google Patents
Refining heavy mineral oil fractions with an anhydrous mixture of sodium hydroxide and potassium hydroxide Download PDFInfo
- Publication number
- US2795532A US2795532A US460269A US46026954A US2795532A US 2795532 A US2795532 A US 2795532A US 460269 A US460269 A US 460269A US 46026954 A US46026954 A US 46026954A US 2795532 A US2795532 A US 2795532A
- Authority
- US
- United States
- Prior art keywords
- sodium hydroxide
- mineral oil
- potassium hydroxide
- hydroxide
- sodium
- 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
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 title claims description 55
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 title claims description 48
- 239000000203 mixture Substances 0.000 title claims description 17
- 238000007670 refining Methods 0.000 title claims description 7
- 229940097789 heavy mineral oil Drugs 0.000 title description 3
- 239000007788 liquid Substances 0.000 claims description 15
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 239000003575 carbonaceous material Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- 239000002480 mineral oil Substances 0.000 claims description 6
- 235000010446 mineral oil Nutrition 0.000 claims description 6
- 230000005484 gravity Effects 0.000 claims description 3
- HNNQYHFROJDYHQ-UHFFFAOYSA-N 3-(4-ethylcyclohexyl)propanoic acid 3-(3-ethylcyclopentyl)propanoic acid Chemical compound CCC1CCC(CCC(O)=O)C1.CCC1CCC(CCC(O)=O)CC1 HNNQYHFROJDYHQ-UHFFFAOYSA-N 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 235000011118 potassium hydroxide Nutrition 0.000 description 16
- 235000011121 sodium hydroxide Nutrition 0.000 description 15
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 10
- 239000000463 material Substances 0.000 description 10
- 239000003921 oil Substances 0.000 description 9
- 239000003518 caustics Substances 0.000 description 7
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 6
- 239000011734 sodium Substances 0.000 description 6
- 229910052708 sodium Inorganic materials 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 5
- 229910000029 sodium carbonate Inorganic materials 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 229910052783 alkali metal Inorganic materials 0.000 description 4
- 150000008044 alkali metal hydroxides Chemical class 0.000 description 4
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 229910000027 potassium carbonate Inorganic materials 0.000 description 3
- BYTCDABWEGFPLT-UHFFFAOYSA-L potassium;sodium;dihydroxide Chemical compound [OH-].[OH-].[Na+].[K+] BYTCDABWEGFPLT-UHFFFAOYSA-L 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- 229910000288 alkali metal carbonate Inorganic materials 0.000 description 2
- 150000008041 alkali metal carbonates Chemical class 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000010688 mineral lubricating oil Substances 0.000 description 2
- 125000005608 naphthenic acid group Chemical group 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000012808 vapor phase Substances 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 244000007645 Citrus mitis Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 239000000374 eutectic mixture Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 239000002198 insoluble material Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- KQSJSRIUULBTSE-UHFFFAOYSA-M sodium;3-(3-ethylcyclopentyl)propanoate Chemical group [Na+].CCC1CCC(CCC([O-])=O)C1 KQSJSRIUULBTSE-UHFFFAOYSA-M 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 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
- C10G19/00—Refining hydrocarbon oils in the absence of hydrogen, by alkaline treatment
- C10G19/067—Refining hydrocarbon oils in the absence of hydrogen, by alkaline treatment with molten alkaline material
Definitions
- This invention relates to refining of heavy mineral oil fractions by contact thereof in vapor phase with liquid alkaline treating agents.
- One manner of operation involves circulating liquid alkaline material comprising sodium hydroxide, sodium naphthenates, and mineral lubricating oil through a caustic treating section comprising several trays of a fractionating tower. A portion of the alkaline material withdrawn from the bottom of the caustic treating section is recycled to the top of the section.
- a serious problem encountered is the formation of carbonaceous deposits on the surfaces of the equipment, and the plugging of conduits, downcomers, etc. by carbonaceous solids. These objectionable carbonaceous deposits are believed to be formed by thermal decomposition of sodium naphthenates, mineral oil, etc. in the caustic treating section. It is further believed that these carbonaceous materials include sodium carbonate which acts as a binder for the other carbonaceous materials. Such sodium carbonate may have been formed, for example, by decomposition of sodium naphthenate to liberate carbon dioxide and reaction of the latter with sodium hydroxide to form the carbonate, or by oxidation of hydrocarbons to form carbon dioxide and reaction of the-latter with sodium hydroxide, or by other mechanism.
- the present invention provides a novel manner of reducing the fouling and plugging of apparatus by carbonaceous materials.
- a mineral oil fraction is contacted in vapor phase with a mixture of sodium hydroxide and potassium hydroxide, which mixture contains about to 95 moles of sodium hydroxide per 90 to 5 moles of potassium hydroxide. It is believed that the mechanism of the improvement obtained according to the invention involves the inhibition of the action of sodium carbonate, or of potassium carbonate, as a binder for other carbonaceous materials, or the removal of carbonates from already-formed deposits or agglomerates of carbonaceous materials, thus breaking up the deposits or agglomerates.
- Reduced naphthenic crude petroleum was preheated to about 650 F. and introduced into a vacuum flash zone in a lower portion of a distillation tower.
- the flashed vapors were introduced into a treating section wherein they were countercurrently contacted with descending liquid alkaline material which had, on the lowermost tray of the treating section, the following approximate composition:
- Liquid alkaline material was removed from the lowermost tray of the treating section, and a portion of the removed liquid alkaline material was recycled to an upper portion of the treating section. The remainder of the alkaline material was introduced into an extraction z'one employing aqueous isopropanol as solvent for alkali metal naphthenates and petroleum naphtha as solvent for oil. Liquid oil recovered from the alkaline material in the extraction operation was recycled to an upper portion of the treating section.
- Fresh alkali metal hydroxide wasintroduced into an upper portion of the treating section at a rate sufficient to maintain the above concentration of alkali metal naph thenates and excess alkali metal hydroxides in the liquid alkaline material on the lowermost tray of the treating section.
- the liquid temperature on the lowermost tray of the treating section was about 630 F.
- the fresh alkali metal "hydroxide charged to the caustic treating section was a mixture of sodium hydroxide and potassium hydroxide containing 5 to 20 mole percent potassium hydroxide for a two-month period of continuous operation.
- the sodium hydroxide and potassium hydroxide molar concentrations were 95 percent and 5 percent respectively, during another part 90 percent and 10 percent respectively, and during another part percent and 20 percent, respectively. All of these concentrations were found to be satisfactory.
- the pressure drop undergone by rising vapors in passing through the caustic treating section remained at a level between about 15 mm. Hg and 25 mm. Hg during the two-month period.
- the pressure drop is a measure of the extent of formation of carbonaceous deposits in the treating section, since the greater the extent of deposit formation, the greater the obstruction of vapor flow, and the greater the pressure drop.
- the l5-25 mm. Hg pressure drop obtained in this example represents a satisfactory operating range.
- potassium carbonate has greater solubility than sodium carbonate in alkaline treating agents containing sodium hydroxide-potassium hydroxide mixtures. At any rate, it has been found that when insoluble materials do form in operation according to the invention, they contain a greater ratio of sodium to potassium than that contained in the sodium hydroxide-potassium hydroxide mixture, thus indicating that potassium carbonate is held in solution in the treating agent more strongly than sodium carbonate.
- the process of the present invention is preferably carried out using a liquid alkaline refining agent containing about 60-95% oil, and preferably at least about oil, since it has been found that such operation together with the use of a mixture of sodium and potassium hydroxides results in a process wherein deposit formation 3 and the resulting disadvantageous etfects are particularly greatly reduced.
- the invention is applicable generally to petroleum fractions having A. P. I. gravity within the approximate range from 10 to 40.
- the process is applied to the refining of vapors from which lubricating oils are subsequently condensed.
- gas oil vapors can also be refined according to the invention.
- the mixture of sodium and potassium hydroxides which is used according to the invention is preferably used as the sole alkaline material charged to the caustic treating, though other alkaline materials, e. g. lime, can also be employed in minor amounts.
- beneficial results were obtained from the use of a caustic mixture containing 5 to 20 parts of KOH per 100 parts of NaOH-KOH mixture. Even more beneficial results can be obtained with greater proportions of KOH, e. g. 30 to 70 parts per 100, since the eutectic mixture, which occurs at about 50 mole percent KOH, has optimum ability to hold alkali metal carbonates in solution. Also, greater proportions of KOH have the advantage of favoring the formation of KzCOs, which is more soluble in the treating agent than NazCOs. However, the present greater cost of KOH may render it more advisable to use relatively small proportions of KOH, and satisfactory results can be obtained with the small proportions.
- Process for refining mineral oil which comprises: contacting naphthenic-acid containing vapors of a mineral oil fraction having A. P. I. gravity within the approximate range from 10 to with a liquid treating agent consisting essentially of a molten anhydrous mixture of sodium hydroxide and potassium hydroxide, said mixture containing about 10 to 95 moles of sodium hydroxide per to 5 moles of potassium hydroxide, thereby to inhibit coating and plugging of the apparatus employed with carbonaceous materials formed during the contacting.
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)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Lubricants (AREA)
Description
United States Patent REFINING HEAVY MINERAL OIL FRACTIONS WITH AN ANHYDRGUS MIXTURE OF 'SODHUM HYDRQXIDE AND POTASSIUM HYDRQXIDE Earl M. Honeycutt, Claymont, Del., assignor to Sun Oil Company, Philadelphia, Pa., a corporation of New Jersey No Drawing. Application October 4, 1954, Serial No. 460,269
3 Claims. (Cl. 196-36) This invention relates to refining of heavy mineral oil fractions by contact thereof in vapor phase with liquid alkaline treating agents.
It is known in the art to remove naphthenic acids from mineral lubricating oils by contacting vapors of the oil with molten sodium hydroxide or with aqueous sodium hydroxide solution. in such treatment, the naphthenic acids contained in the vapors react with sodium hydroxide to form sodium naphthenates in the liquid phase present in the treating zone.
One manner of operation involves circulating liquid alkaline material comprising sodium hydroxide, sodium naphthenates, and mineral lubricating oil through a caustic treating section comprising several trays of a fractionating tower. A portion of the alkaline material withdrawn from the bottom of the caustic treating section is recycled to the top of the section.
A serious problem encountered is the formation of carbonaceous deposits on the surfaces of the equipment, and the plugging of conduits, downcomers, etc. by carbonaceous solids. These objectionable carbonaceous deposits are believed to be formed by thermal decomposition of sodium naphthenates, mineral oil, etc. in the caustic treating section. It is further believed that these carbonaceous materials include sodium carbonate which acts as a binder for the other carbonaceous materials. Such sodium carbonate may have been formed, for example, by decomposition of sodium naphthenate to liberate carbon dioxide and reaction of the latter with sodium hydroxide to form the carbonate, or by oxidation of hydrocarbons to form carbon dioxide and reaction of the-latter with sodium hydroxide, or by other mechanism.
The present invention provides a novel manner of reducing the fouling and plugging of apparatus by carbonaceous materials. According to the present invention, a mineral oil fraction is contacted in vapor phase with a mixture of sodium hydroxide and potassium hydroxide, which mixture contains about to 95 moles of sodium hydroxide per 90 to 5 moles of potassium hydroxide. It is believed that the mechanism of the improvement obtained according to the invention involves the inhibition of the action of sodium carbonate, or of potassium carbonate, as a binder for other carbonaceous materials, or the removal of carbonates from already-formed deposits or agglomerates of carbonaceous materials, thus breaking up the deposits or agglomerates.
The following example illustrates the invention:
Reduced naphthenic crude petroleum was preheated to about 650 F. and introduced into a vacuum flash zone in a lower portion of a distillation tower. The flashed vapors were introduced into a treating section wherein they were countercurrently contacted with descending liquid alkaline material which had, on the lowermost tray of the treating section, the following approximate composition:
Weight percent Liquid m'l 85-88 Alkali metal naphthenates 1 Alkali metal hydroxides 1-2 Liquid alkaline material was removed from the lowermost tray of the treating section, and a portion of the removed liquid alkaline material was recycled to an upper portion of the treating section. The remainder of the alkaline material was introduced into an extraction z'one employing aqueous isopropanol as solvent for alkali metal naphthenates and petroleum naphtha as solvent for oil. Liquid oil recovered from the alkaline material in the extraction operation was recycled to an upper portion of the treating section.
Fresh alkali metal hydroxide wasintroduced into an upper portion of the treating section at a rate sufficient to maintain the above concentration of alkali metal naph thenates and excess alkali metal hydroxides in the liquid alkaline material on the lowermost tray of the treating section. The liquid temperature on the lowermost tray of the treating section was about 630 F.
The uncondens'ed vapors passed from the top of the treating section into the fractionating section and upwardly therethrough. Normal reflux was maintained from the fractionating section to the treating section by means of a liquid downcomer from the lowermost tray of'tlie fractionating section of the top tray of the treating section.
The fresh alkali metal "hydroxide charged to the caustic treating section was a mixture of sodium hydroxide and potassium hydroxide containing 5 to 20 mole percent potassium hydroxide for a two-month period of continuous operation. During part of this time, the sodium hydroxide and potassium hydroxide molar concentrations were 95 percent and 5 percent respectively, during another part 90 percent and 10 percent respectively, and during another part percent and 20 percent, respectively. All of these concentrations were found to be satisfactory.
The pressure drop undergone by rising vapors in passing through the caustic treating section remained at a level between about 15 mm. Hg and 25 mm. Hg during the two-month period. The pressure drop is a measure of the extent of formation of carbonaceous deposits in the treating section, since the greater the extent of deposit formation, the greater the obstruction of vapor flow, and the greater the pressure drop. The l5-25 mm. Hg pressure drop obtained in this example represents a satisfactory operating range.
It is believed that the beneficial results obtained according to the invention probably result from the greater ability of alkaline treating agents containing sodium hydroxide-potassium hydroxide mixtures to dissolve and hold in solution alkali metal carbonates which are formed by decomposition of carbonaceous materials in the treating section. This greater ability results in a reduction in the amount of solid carbonates available to form objectionable deposits.
It appears further that potassium carbonate has greater solubility than sodium carbonate in alkaline treating agents containing sodium hydroxide-potassium hydroxide mixtures. At any rate, it has been found that when insoluble materials do form in operation according to the invention, they contain a greater ratio of sodium to potassium than that contained in the sodium hydroxide-potassium hydroxide mixture, thus indicating that potassium carbonate is held in solution in the treating agent more strongly than sodium carbonate.
The process of the present invention is preferably carried out using a liquid alkaline refining agent containing about 60-95% oil, and preferably at least about oil, since it has been found that such operation together with the use of a mixture of sodium and potassium hydroxides results in a process wherein deposit formation 3 and the resulting disadvantageous etfects are particularly greatly reduced.
The invention is applicable generally to petroleum fractions having A. P. I. gravity within the approximate range from 10 to 40. Usually, the process is applied to the refining of vapors from which lubricating oils are subsequently condensed. However, gas oil vapors can also be refined according to the invention.
The mixture of sodium and potassium hydroxides which is used according to the invention is preferably used as the sole alkaline material charged to the caustic treating, though other alkaline materials, e. g. lime, can also be employed in minor amounts.
In the preceding example beneficial results were obtained from the use of a caustic mixture containing 5 to 20 parts of KOH per 100 parts of NaOH-KOH mixture. Even more beneficial results can be obtained with greater proportions of KOH, e. g. 30 to 70 parts per 100, since the eutectic mixture, which occurs at about 50 mole percent KOH, has optimum ability to hold alkali metal carbonates in solution. Also, greater proportions of KOH have the advantage of favoring the formation of KzCOs, which is more soluble in the treating agent than NazCOs. However, the present greater cost of KOH may render it more advisable to use relatively small proportions of KOH, and satisfactory results can be obtained with the small proportions.
In the preceding disclosures of relative amounts of sodium hydroxide and potassium hydroxide, the figures given are based on total alkali metal hydroxide, though other constituents are present in the liquid alkaline treating agent.
The invention claimed is:
1. Process for refining mineral oil which comprises: contacting naphthenic-acid containing vapors of a mineral oil fraction having A. P. I. gravity within the approximate range from 10 to with a liquid treating agent consisting essentially of a molten anhydrous mixture of sodium hydroxide and potassium hydroxide, said mixture containing about 10 to 95 moles of sodium hydroxide per to 5 moles of potassium hydroxide, thereby to inhibit coating and plugging of the apparatus employed with carbonaceous materials formed during the contacting.
2. Process according to claim 1 wherein said liquid treating agent contains 60 to oil.
3. Process according to claim 1 wherein said fraction has average molecular weight at least as high as that of gas oil.
' References Cited in the file of this patent UNITED STATES PATENTS 1,784,262 Wheeler et al Dec. 9, 1930 2,227,811 Moser Jan. 7, 1941 2,481,300 Engel Sept. 6, 1949
Claims (1)
1. PROCESS FOR REFINING MINERAL OIL WHICH COMPRISES; CONTACTING NAPHTHENIC-ACID CONTAINING VAPORS OF A MINERAL OIL FRACTION HAVING A.P.I. GRAVITY WITHIN THE APPROXIMATE RANGE FROM 10 TO 40 WITH A LIQUID TREATING AGENT CONSISTING ESSENTIALLY OF A MOLTEN ANHYDROUS MIXTURE OF SODIUM HYDROXIDE AND POTASSIUM HYDROXIDE, SAID MIXTURE CONTAINING ABOUT 10 TO 95 MOLES OF SODIUM HYDROXIDE PER 90 TO 5 MOLES OF POTASSIUM HYDROXIDE, THEREBY TO INHIBIT COATING AND PLUGGING OF THE APPARATUS EMPLOYED WITH CARBONACEOUS MATERIAL FORMED DURING THE CONTACTING.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US460269A US2795532A (en) | 1954-10-04 | 1954-10-04 | Refining heavy mineral oil fractions with an anhydrous mixture of sodium hydroxide and potassium hydroxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US460269A US2795532A (en) | 1954-10-04 | 1954-10-04 | Refining heavy mineral oil fractions with an anhydrous mixture of sodium hydroxide and potassium hydroxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2795532A true US2795532A (en) | 1957-06-11 |
Family
ID=23828020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US460269A Expired - Lifetime US2795532A (en) | 1954-10-04 | 1954-10-04 | Refining heavy mineral oil fractions with an anhydrous mixture of sodium hydroxide and potassium hydroxide |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2795532A (en) |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2944014A (en) * | 1956-12-10 | 1960-07-05 | Sun Oil Co | Obtaining neutral distillates from petroleum |
| US3080312A (en) * | 1960-04-13 | 1963-03-05 | Sun Oil Co | Production of lubricating oils from naphthenic crudes |
| US3216927A (en) * | 1962-08-20 | 1965-11-09 | Sinclair Research Inc | Caustic treatment of fuel oils |
| FR2424314A1 (en) * | 1978-04-27 | 1979-11-23 | Degussa | PROCESS FOR THE REGENERATION OF WASTE LUBRICATING OILS II |
| WO1997008270A1 (en) * | 1995-08-25 | 1997-03-06 | Exxon Research And Engineering Company | Process for decreasing the acid content and corrosivity of crudes |
| US5683626A (en) * | 1995-08-25 | 1997-11-04 | Exxon Research And Engineering Company | Process for neutralization of petroleum acids |
| US5891325A (en) * | 1998-08-11 | 1999-04-06 | Exxon Research And Engineering Co. | Process for reducing total acid number of crude oil |
| US5904839A (en) * | 1997-06-06 | 1999-05-18 | Exxon Research And Engineering Co. | Process for upgrading heavy oil using lime |
| US5914030A (en) * | 1997-08-29 | 1999-06-22 | Exxon Research And Engineering. Co. | Process for reducing total acid number of crude oil |
| US6030523A (en) * | 1997-05-30 | 2000-02-29 | Exxon Research And Engineering Co. | Process for neutralization of petroleum acids (LAW810) |
| US6121411A (en) * | 1997-12-17 | 2000-09-19 | Exxon Research And Engineering Company | Process for decreased the acidity of crudes using crosslinked polymeric amines (LAW871) |
| US6190541B1 (en) | 1999-05-11 | 2001-02-20 | Exxon Research And Engineering Company | Process for treatment of petroleum acids (LAW824) |
| US6228239B1 (en) | 1999-02-26 | 2001-05-08 | Exxon Research And Engineering Company | Crude oil desalting method |
| US6281328B1 (en) | 1999-08-06 | 2001-08-28 | Exxonmobil Research And Engineering Company | Process for extraction of naphthenic acids from crudes |
| EP2628780A1 (en) | 2012-02-17 | 2013-08-21 | Reliance Industries Limited | A solvent extraction process for removal of naphthenic acids and calcium from low asphaltic crude oil |
| CN111099992A (en) * | 2020-01-03 | 2020-05-05 | 中国地质大学（武汉） | A kind of liquid-liquid extraction method of carboxylic acid compound in petroleum |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1784262A (en) * | 1927-06-24 | 1930-12-09 | Raymond C Wheeler | Alkaline treatment of petroleum vapors |
| US2227811A (en) * | 1938-05-23 | 1941-01-07 | Shell Dev | Process for removing naphthenic acids from hydrocarbon oils |
| US2481300A (en) * | 1943-08-10 | 1949-09-06 | Shell Dev | Process for purifying hydrocarbons |
-
1954
- 1954-10-04 US US460269A patent/US2795532A/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1784262A (en) * | 1927-06-24 | 1930-12-09 | Raymond C Wheeler | Alkaline treatment of petroleum vapors |
| US2227811A (en) * | 1938-05-23 | 1941-01-07 | Shell Dev | Process for removing naphthenic acids from hydrocarbon oils |
| US2481300A (en) * | 1943-08-10 | 1949-09-06 | Shell Dev | Process for purifying hydrocarbons |
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2944014A (en) * | 1956-12-10 | 1960-07-05 | Sun Oil Co | Obtaining neutral distillates from petroleum |
| US3080312A (en) * | 1960-04-13 | 1963-03-05 | Sun Oil Co | Production of lubricating oils from naphthenic crudes |
| US3216927A (en) * | 1962-08-20 | 1965-11-09 | Sinclair Research Inc | Caustic treatment of fuel oils |
| FR2424314A1 (en) * | 1978-04-27 | 1979-11-23 | Degussa | PROCESS FOR THE REGENERATION OF WASTE LUBRICATING OILS II |
| US6022494A (en) * | 1995-08-25 | 2000-02-08 | Exxon Research And Engineering Co. | Process for decreasing the acid content and corrosivity of crudes |
| AU707465B2 (en) * | 1995-08-25 | 1999-07-08 | Exxon Research And Engineering Company | Process for decreasing the acid content and corrosivity of crudes |
| WO1997008270A1 (en) * | 1995-08-25 | 1997-03-06 | Exxon Research And Engineering Company | Process for decreasing the acid content and corrosivity of crudes |
| US5683626A (en) * | 1995-08-25 | 1997-11-04 | Exxon Research And Engineering Company | Process for neutralization of petroleum acids |
| US6030523A (en) * | 1997-05-30 | 2000-02-29 | Exxon Research And Engineering Co. | Process for neutralization of petroleum acids (LAW810) |
| US5904839A (en) * | 1997-06-06 | 1999-05-18 | Exxon Research And Engineering Co. | Process for upgrading heavy oil using lime |
| US5914030A (en) * | 1997-08-29 | 1999-06-22 | Exxon Research And Engineering. Co. | Process for reducing total acid number of crude oil |
| US6121411A (en) * | 1997-12-17 | 2000-09-19 | Exxon Research And Engineering Company | Process for decreased the acidity of crudes using crosslinked polymeric amines (LAW871) |
| US5891325A (en) * | 1998-08-11 | 1999-04-06 | Exxon Research And Engineering Co. | Process for reducing total acid number of crude oil |
| US6228239B1 (en) | 1999-02-26 | 2001-05-08 | Exxon Research And Engineering Company | Crude oil desalting method |
| US6190541B1 (en) | 1999-05-11 | 2001-02-20 | Exxon Research And Engineering Company | Process for treatment of petroleum acids (LAW824) |
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| CN111099992A (en) * | 2020-01-03 | 2020-05-05 | 中国地质大学（武汉） | A kind of liquid-liquid extraction method of carboxylic acid compound in petroleum |
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