US2196796A - Process for improving drying - Google Patents
Process for improving drying Download PDFInfo
- Publication number
- US2196796A US2196796A US2196796DA US2196796A US 2196796 A US2196796 A US 2196796A US 2196796D A US2196796D A US 2196796DA US 2196796 A US2196796 A US 2196796A
- Authority
- US
- United States
- Prior art keywords
- oil
- weight
- treated
- acid
- oils
- 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
- 238000000034 method Methods 0.000 title description 26
- 238000001035 drying Methods 0.000 title description 10
- 239000003921 oil Substances 0.000 description 46
- 235000019198 oils Nutrition 0.000 description 46
- 230000000111 anti-oxidant Effects 0.000 description 16
- 239000003963 antioxidant agent Substances 0.000 description 16
- 235000006708 antioxidants Nutrition 0.000 description 16
- 239000002253 acid Substances 0.000 description 14
- 239000003153 chemical reaction reagent Substances 0.000 description 10
- GRYLNZFGIOXLOG-UHFFFAOYSA-N nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 10
- 235000019486 Sunflower oil Nutrition 0.000 description 6
- 239000003513 alkali Substances 0.000 description 6
- 230000001590 oxidative Effects 0.000 description 6
- 239000002600 sunflower oil Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 239000007800 oxidant agent Substances 0.000 description 4
- JLPULHDHAOZNQI-ZTIMHPMXSA-N 1-hexadecanoyl-2-(9Z,12Z-octadecadienoyl)-sn-glycero-3-phosphocholine Chemical compound CCCCCCCCCCCCCCCC(=O)OC[C@H](COP([O-])(=O)OCC[N+](C)(C)C)OC(=O)CCCCCCC\C=C/C\C=C/CCCCC JLPULHDHAOZNQI-ZTIMHPMXSA-N 0.000 description 2
- 239000004342 Benzoyl peroxide Substances 0.000 description 2
- 240000007842 Glycine max Species 0.000 description 2
- 235000010469 Glycine max Nutrition 0.000 description 2
- OMPJBNCRMGITSC-UHFFFAOYSA-N Incidol Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 2
- 229940067606 Lecithin Drugs 0.000 description 2
- 235000004347 Perilla Nutrition 0.000 description 2
- 240000003877 Perilla frutescens Species 0.000 description 2
- 235000004348 Perilla frutescens Nutrition 0.000 description 2
- 235000019484 Rapeseed oil Nutrition 0.000 description 2
- 239000012445 acidic reagent Substances 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- 235000019400 benzoyl peroxide Nutrition 0.000 description 2
- 238000004061 bleaching Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 239000000787 lecithin Substances 0.000 description 2
- 235000010445 lecithin Nutrition 0.000 description 2
- 235000021388 linseed oil Nutrition 0.000 description 2
- 239000000944 linseed oil Substances 0.000 description 2
- 235000019645 odor Nutrition 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
Classifications
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B11/00—Recovery or refining of other fatty substances, e.g. lanolin or waxes
Definitions
- the present invention relates broadly to a process for improving the drying properties of naturally occurring 5 anti-oxidants.
- Theopimum range in the case of the alkali was found to be.013- .050 part by weight of alkali to 100 parts by weight of the oil, and in the case of the acid reagent the range was .025-.050 part by weight of acid to 100 parts by weight of the oil being treated.
- the present application is specifically directed to the improving of oils using a definite quantity of a reagent which serves the dual function of an oxidizing agent and of a reagent for controlling the pH value of the solution.
- concentrated nitric acid fulfills this double function.
- the quantity of this acid employed may vary substantially within the range of .025-0.50% by weight of the oil, particularly good results 40 being obtainable when concentrated nitric acid in the proportion of about 0.20% by weight is employed.
- oils containing naturally occurring anti-oxidants may be improved as to their drying properties by treatment in accordance with the present process, among which may acid within the limited range referred to above.
- the process efiectively removes the anti-oxidants (such as lecithin and kephalin) which are naturally occurring in these oils.
- the sludge containing the anti-oxidants and spent reagents I may be separated from the refined oil in any suit able manner, such "aisby filtering, centrifuging, orthe like, depending on the nature of the treating solution.
- the oil is preferably treated for one-half hour to two hours and may be mechanically agitated either by means of a stirrer or by blowing filtered air or an inert gas through the material, it being a of raw oils containing naturally occurring antioxidants, which comprises removing the antioxidants by treating the oil at substantially room temperature with intric acid, and maintaining the pH value of the materials undergoing treatment only slightly acid throughout the treatment by confining the quantity of nitric acid employed substantially within the range of .025-.50% by weight of the oil being treated,- continuing the treatment just until the refractive index begins to increase, then discontinuing the treatment and separating the treated oils from the other constituents.
- oil treated' is a member of a group consisting of linseed oil, soya bean oll, sunflower oil, perilla oil, rapeseed oil and oiticica oil.
Description
Patented Apr. 9, 1940 PATENT OFFICE PROCESS FOR IMPROVING DRYING PROPERTIES OF OILS Theodore S. Hodgins, Royal Oak, Mich., assignor to Reichhold Chemicals, Inc.-, formerly Beck;
7 Koller & Company, Inc., Detroit, Mich.
No Drawing. Application July 17, 1939, Serial No. 285,001
4 Claims.
In common with the disclosure of my Patent No. 2,133,894 dated October 18, 1938, the present invention relates broadly to a process for improving the drying properties of naturally occurring 5 anti-oxidants.
According to the process claimed in said patent quantities with respect to the weight of the oil.
. Theopimum range in the case of the alkali was found to be.013- .050 part by weight of alkali to 100 parts by weight of the oil, and in the case of the acid reagent the range was .025-.050 part by weight of acid to 100 parts by weight of the oil being treated.
In my application Serial No. 240,858 filed November 16, 1938, now Patent No. 2,167,206 dated July 25, 1939, it was shown that similar results could be obtained by the use of an organic oxidizing agent such as benzoyl peroxide, and properly controlling the pH value of the solution .by the use of an acid or alkaline reagent in the proportion of approximately 1-5% by weight of the oil being treated.
The present application is specifically directed to the improving of oils using a definite quantity of a reagent which serves the dual function of an oxidizing agent and of a reagent for controlling the pH value of the solution. I have found that concentrated nitric acid fulfills this double function. The quantity of this acid employed may vary substantially within the range of .025-0.50% by weight of the oil, particularly good results 40 being obtainable when concentrated nitric acid in the proportion of about 0.20% by weight is employed.
Various types of oils containing naturally occurring anti-oxidants may be improved as to their drying properties by treatment in accordance with the present process, among which may acid within the limited range referred to above. The process efiectively removes the anti-oxidants (such as lecithin and kephalin) which are naturally occurring in these oils. The sludge containing the anti-oxidants and spent reagents I may be separated from the refined oil in any suit able manner, such "aisby filtering, centrifuging, orthe like, depending on the nature of the treating solution. a
I am aware that previous attempts have been 10 made to improve the drying properties ofoils by partially oxidizing the same, particularly by passing air'or other oxidizing gas through the body of the oil. My invention is not concerned with this type of oxidation. In such prior processes the oxi- 15 dation has taken place within the oil itself whereas according to my process only the anti-oxidants are eliminated, the oil being unoxidized. Also in such previous treatments temperatures above room temperature have been considered necessary whereas my process may be carried on to best advantage at substantially room temperature.
It has also been proposed totreat various oils with chemical reagents such as acids, alkalies and salts for the purpose of improving their qualtities, mi as for example for removing odors or bleaching the same, but to my knowledge no successful process has been carried out at room temperature wherein the anti-oxidants are removed by treatment at room temperature employing a small pre- 80 determined quantity of an oxidizing agent-which. also serves to control the acidity of the solution 4 within definite limits.
The invention will be more readily understood by reference to the following specific example. 86
Example Parts by weight Sunflower oil Concentrated nitric acid r 0.2 Water (not constant) 1.0to 10 The oil is preferably treated for one-half hour to two hours and may be mechanically agitated either by means of a stirrer or by blowing filtered air or an inert gas through the material, it being a of raw oils containing naturally occurring antioxidants, which comprises removing the antioxidants by treating the oil at substantially room temperature with intric acid, and maintaining the pH value of the materials undergoing treatment only slightly acid throughout the treatment by confining the quantity of nitric acid employed substantially within the range of .025-.50% by weight of the oil being treated,- continuing the treatment just until the refractive index begins to increase, then discontinuing the treatment and separating the treated oils from the other constituents.
2. A process as set forth in claim 1, wherein the quantity of nitric acid employed is approximately 0.20 by weight of the 011 being treated.
3. A process as set forth in claim 1, wherein the oil treated'is a member of a group consisting of linseed oil, soya bean oll, sunflower oil, perilla oil, rapeseed oil and oiticica oil.
'4. A process as set forth in claim 1, wherein the oil treated is sunflower oil.
. THEODORE S. HODGINS.
Publications (1)
Publication Number | Publication Date |
---|---|
US2196796A true US2196796A (en) | 1940-04-09 |
Family
ID=3431201
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US2196796D Expired - Lifetime US2196796A (en) | Process for improving drying |
Country Status (1)
Country | Link |
---|---|
US (1) | US2196796A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2569136A (en) * | 1950-04-28 | 1951-09-25 | Pittsburgh Plate Glass Co | Method of improving color and drying characteristics and similar properties of drying glyceride oils |
-
0
- US US2196796D patent/US2196796A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2569136A (en) * | 1950-04-28 | 1951-09-25 | Pittsburgh Plate Glass Co | Method of improving color and drying characteristics and similar properties of drying glyceride oils |
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