Патент USA US2120128код для вставки
Patented June 7, 1938 2,120,128‘ ATENT FFl?E anodes mmm'ron CLEANKNG comosrrron Benjamin Gall'sworthy, Glenham, N. Y., assignor to The Texas Company, New York, N. Y... a corporation otDelaware i No Drawing. Application August 27, 1934, Serial No. 741,741 1i Claims. This invention relates to a radiator cleaning compound adapted to be added to the circulating water of a radiator of an internal combustion en gine, for the purpose of removing accumulated 5 rust, dirt and scale and increasing the co-e?lcient of heat transfer of the radiator shell and cylinder block. ' ' Various types of radiator cleaning composi tions of this character have heretofore been sug gested, but have been in the main either com paratively ineffective for the purpose or else ob jectionable as dangerous to use because of chem ical attack upon the metal parts of the circulat ing system, solder, hose connections and the like. Such compositions have generally been in the form of dry powders to be added to the circulat ing water, or‘ concentrated water solutions. .While having some bene?cial‘ effect upon depos ited scale or dirt, such materials are generally 20 ineffective in removing the scum of deposited oil which accumulates‘ in a radiator of this char acter. In order to remove ‘such an oily ‘scum, a petroleum fraction of the character of kerosene has been employed. However, it has proved difli 25 cult to secure an e?ective mixture of kerosene with a cleaningcompound,v in order to secure the desired easy handling and addition of the materials to‘ a radiator for effective distribution therein. 30 , , It is an object of the present invention to pro vide a radiator cleaning'composition of this char acter which is effective in removing both scale and oily scum without objectionable action upon materials of the circulating system, and to pro; vide the composition in a highly effective form which can be easily handled and directly added to the circulating water so as to obtain maximum ei‘?ciency. ~~ - v ’ e ' ' In accordance with the present invention the 40 radiator cleaning composition is a concentrate in the form of a water-oil emulsion containingv a permanent or semi-permanent emulsion of the water. kerosene and alkali metal cleaning com pound. Various alkali metal soaps or trieth— anolarnine soaps can be used for this purpose. But, preferably, an alkali metal soap of acids of 5 oxidized waxy hydrocarbons is employed as con stituting a highly e?ective andi'economical emul sifying agent. A. very satisfactory material of this character is obtained by forming the alkali metal soap of acids of oxidized para?in wax, the m latter being prepared as disclosed in my U. S. Patent No. 1,909,945. As set forth in the patent, a charge of para?in wax, for example crude scale wax having a gravity of between 48° and 50° A. P. I. at 130° F., is placed in an enameled or 15 aluminum vessel which is preferably jacketed or otherwise ?tted to permit heating or cooling of the contents. The vessel is also ?tted with an air distributor, preferably located near the bot tom, through which air may be introduced in fine streams to promote intimate contact of the air with the oxidizing mass. If the vessel is well insulated, the heat developed by the oxidation will be su?icient to maintain the charge at the proper temperature, once it has been brought to that temperature by outside means such as a steam coil. The charge of wax may be heated to a temperature between 260° and 335° F. and air may be introduced in sufficient quantity to maintain the desired temperature. The most 30 satisfactory temperature range for the oxidation has been found to be about 3l5°-320° F. The oxidation is allowed to proceed until the batch attains a gravity of 33°~35° A. P. I. By carrying out the oxidation in this manner, a material is 35 produced having a low acid value while contain ing a relatively large’ amount of saponifiablev - bodies or esters. Moreover, the oxidized material is substantially free from red gum, which is that material insoluble in naphtha, for example an 40 86° Bé. gasoline. The resulting oxidized material cleaning compound’ and an emulsifying agent. is then subjected to sweating at 90°-100° F. and The oil employed is preferably a kerosene frac separated into approximately % of semi-liquid sweatings ‘and 1/3 of solid waxy material. The tion. Various. types of alkali metal cleaning 45 compounds can be employed, which are of a char acter to e?ect desired removal f rust; scale and dirt and at the same time avoid injury to the .50 ' (Cl. 87-5) sweatings so obtained had approximately the fol- 45 lowing tests: ' I metal and rubber parts of the circulating system. Gravity, °Bé _______________________ __ A very satisfactory material of this character is Viscosity at 100° F__________________ __ 205 S.U. sodium metasilicate. However,‘ ordinary water Pour, "F ___________________________ __ Neutralization No _____ _____________ __ glass or other alkalimetal or soluble silicates can . be employed. Likewise, trisodium phosphate or other alkali metal phosphates can be used. An emulsifying agent, preferably in the form 55 of an ‘alkali metal soap, is employed to form a Saponi?cation No ___-_ ______________ .._ 25.5 95 25.8 50 - 129 The following is an example of the preparation of a radiator cleaning composition of this inven tion, utilizing the oxidized para?in wax sweatings 55 2 2,120,128 obtained as above outlined. The following in gredients were heated together at around 180° F. for 7 hours, with occasional stirring: Percent by Grams weight I \ over night in the radiator, which is then drained and ?ushed. The proportions in which the in gredients of the composition can be employed and the strength of the concentrate, can be varied ~within wide limits; and it ‘is to be understood that the above is given by way of example and not by way of limitation. Oxidized para?in wax sweatings _____________ __ Sodium hydroxide 95 percent ________________ __ 600 40 60 4 Water 360 36 ' 10 I The mixture lost 247 g. in weight during the above saponi?cation which left it with the following approximate composition: of the invention, as hereinbefore set forth, may} be made without departing from the spirit and 10 scope thereof, and therefore only such limita tions should be imposed as are indicated in the appended claims. I claim: 15 Grams Percent by weight . Obviously many modi?cations and variations ' , g 1. A radiator cleaning composition consisting 15 essentially of a preformed concentrated emulsion of water in kerosene containing a soluble silicate Oxidized paraffin wax sweatings 600 79. 68 _ 40 5. 31 Water _______________________________________ __ 113 15. 00 Sodium hydroxide 95 percent__ 20 50.0 g. of this impure sodium soap of oxidized para?in wax acids, prepared as outlined above, was then mixed at 180° F. with 1000 g. of water. 25 The mixture was then allowed to stand and and the sodium soap of acids of oxidized para?in wax, the composition being adapted to be added directly to the circulating water of an internal 20 combustion engine cooling system to form a di lute emulsion of cleaning effectiveness therewith. 2. A radiator cleaning composition consisting essentially of a preformed concentrated emulsion of water in kerosene containing sodium metasili 25 stratify into 2 layers. The top layer, amounting cate and the sodium soap of acids of oxidized to about 20% by volume and consisting. mainly of unsaponi?able waxes, was removed from the bot tom layer of soap solution, while the material para?in wax, the composition being adapted‘to 30 was still warm (about 120° F.). To, this soap solution was added about 10% by weight of sodium metasilicate, ‘and-the material agitated until the metasilicate dissolved. Approximately. 75% by weight of this soap solution containing 35 the metasilicate was then agitated in a high speed stirrer with 25% by weight of kerosene, until a good emulsion ‘was obtained which showed little ‘signs of separation after standing 1 week. be added directly to the circulating water of an internal combustion engine cooling system to form a dilute emulsion of cleaning effectiveness there 80' with. 3. A radiator cleaning composition comprising a preformed concentrated emulsion consisting of about 75% by weight of a sodium soap of oxidized paraffin wax sweatings in solution in about twice 35 the weight of water of the said sweatings, and con taining about 10% by weight of sodium metasili cate on the weight of the said soap solution, to The above concentrate in the form of an emul ‘ gether with about 25% by weight of kerosene. ‘sion has many advantages in ease of handling 4. The method of forming a. radiator cleaning composition, which consists of mixing an-alkali and in effectiveness as a. radiator cleaner. In use, the concentrate may be poured directly into a metal soap'of oxidized paraffin wax acids with large volume of water in the circulating system, whereupon with running of the engine, a dilute 45 emulsion ‘is formed throughout the circulating system. For example, about 1/2 to 3 pounds of ‘the - concentrated emulsion may be added to approx imately 2-3 gallons of circulating water to give an effective cleaning action. The radiator engine 50 may be run for about 30 minutes, and then the radiator drained and flushed. Or, if desired, the cleaning composition may be allowed to remain It water, dissolving therein an alkali metal silicate, ‘and then emulsifying the said solution with kero sene to produce a preformed concentrated ‘stable 46 emulsion which is adapted to be added in said emulsified condition directly to the circulating Water of an internal combustion engine cooling system to form a dilute emulsion of cleaning ef fectiveness therewith. BENJAMIN GALLSWOR'I‘II-IY.