US1917489A - Method for removing scale incrustations, oil and the like in water receptacles - Google Patents

Description

Patented July 11, 1933 UNITED STATES PATENT OFFICE HUMBERT IBIZZON'I, OF NEW YORK, AND PHILIP LENT, OF BROOKLYN, NEW YORK METHOD FOR REMOVING SCALE INCRUSTATIONS, OIL AND THE LIKE IN WATER REGEPTACLES No Drawing.

This invention relates to the composition and method for removing scale incrustations, oil and the like in water receptacles, such as boilers, automobile radiators and the like. In

water receptacles where the drain or outlet is located at a point above the bottom of the receptacle, it is of importance to provide for the complete draining of the water receptacle with the dissolved scale incrustations and the )i1 without permitting any of the latter to settle in the bottom of the container.

One of the objects of this invention therefore and a dominant feature thereof, is the provision of a method whereby dissolved oil and other impurities in a liquid receptacle may be brought to any level in the receptacle, at which level it may be drained oif.

A further object of the invention is to provide a composition and method of the character described, which shall be highly eflicient and eflective and shall work equally well with cold or heated water in the receptacle treated.

Other objects and advantages of the invention will in part be obvious and in part pointed out.

Our invention will be understood from the following example and its application to the cleansing of a boiler. The latter usually has a certain amount of oil floating on the surface of the water while the inner Wall thereof may become incrustated with iron oxide or other scale formations formed thereon, all of which lll'lltSG the efficiency and prevent the proper joperation of the boiler. To remove these, we first pour into the boiler an oil solvent having a density greater than than Water, such for example, as trichlorethylene. The latter descends to the bottom of the boiler carrying with it such portions of the oil as have become dissolved by contact with the solvent. We then add a salt capable of attacking or dissolving the rust or incrustations as for example, sodium peroxide. A sufiicient amount is employed to elfectively dissolve or loosen the rust, or incrustations or other impurities, some of which, such as iron oxide, will float to the surface of the liquid and some of which will drop to the bottom, from where it may be removed, as for instance in case of an auto- Application filed April 11,

1930. Serial No. 443,609.

mobile radiator having a drain opening at the bottom of the radiator.

We then introduce into the container, a water soluble salt such as potassium carbon ate which is capable of increasing the specific gravity of the water, thus causing the trichlorethylene to rise to the surface, thereby dissolving the undissolved substances adhering to the water container or still floating upon the surface of the Water. The resultant liquid holds dissolved therein, the rust incrustations and the oil.

We then add water to decrease the density of the liquid, below the density of the dissolved oil, thereby causing the trichlorethylene and the dissolved oil which is of greater density to descend again. By regulating the amount of water thus added, the point to which the oil solvent and oil descends, may thus be controlled and the dissolved substances may then be drained off at the desired point in the receptacle. I Where the draining oif at a level above the bottom of the receptacle is not important as for example, in cleaning automobile radiators where the outlet is at the bottom, the steps of the addition of the potassium carbonate and water may be omitted, the introduction of the oil solvent and soluble salt for attacking the rust or incrustations, being suffieient. As the reaction takes place between the water and the sodium peroxide, the liquid is stirred up and a complete cleansing circulation established thru the radiator core and after the reaction has subsided, the water with the dissolved oil and other impurities therein may be readily drained ofi.

While We have referred to triohlorethylene as the preferred oil solvent, it Will be understood of course, that other oil solvents heavier than water may be employed. Trichlorethylene however, is preferable because it is not inflammable and obviously where sodium peroxide is employed, an oil solvent should be of non-inflammable character. Likewise, metallic sodium or metallic potassium or other oxides of sodium and potassium or any other water soluble substances capable of attacking or dissolving rusts or in'crusta- 10m tions may be employed instead of sodium peroxide.

It will also be understood that instead of potassium carbonate, any other water soluble 5 salts of potassium or sodium capable of increasing the specific gravity of the water, may be employed.

Our method and compound have the further advantage that they may be employed effectively both with cold and heated Water. This is of particular importance in cleaning automobile radiators since it is not necessary to run the motor and circulate the water so as to become heated.

It will thus be seen that there is provided a material and process in which the several objects of this invention are achieved, and which is well adapted to meet the conditions of practical use.

As various possible embodiments might b made of the above invention, and as various changes might be made in the embodiment set forth, it is to be understood that all matter herein set forth is to be interpreted as illustrative and not in a limiting sense.

Having thus described our invention, We claim as new and desire to secure by Letters Patent:

1. A process for removing oil from a water receptacle having water therein and oil on the surface of the water consisting in introducing into the water at the surface thereof, a non-inflammable oil solvent of greater density than Water and non-soluble in Water to dissolve the oil and descend to the bottom of the receptacle, then introducing into the water a Water soluble salt of greater density than water to form therewith a liquid having a density greater than the density of the dissolved substances and thereby causing the latter to rise in the liquid.

2. A process for removing oil from a Water receptacle having Water therein and oil on the surface of the water consisting in introducing into the water at the surface thereof, a noninflammable oil solvent of greater density than water to dissolve the oil and descend to the bottom of the receptacle, then introducing into the Water a Water soluble salt of greater density than water to form therewith a liquid having a density greater than the density of the dissolved substances and thereby causing the latter to rise in the liquid, and then adding water to the liquid to reduce the density of the liquid and cause the dissolved substances to again descend in the liquid.

3. A process for removing oil and incrustations such as rust and scale from a water receptacle having water therein and oil on the surface of the Water consisting in introducing into the water at the surface thereof, a non-inflammable oil solvent having a greater density than water-and non-soluble in water to dissolve the oil and descend to the hottom of the receptacle, and then introducing into the water a solvent comprising one or more of the following group: metallic sodium and potassium and the oxides thereof to dissolve said incrustations..

4. A process for removing oil and incrustations such as rust and scale and the like impurities from a water receptacle having water therein and oil on the surface of the water consisting in introducing into the Water, a non-inflammable oil solvent greater in density than water and non-soluble in water to dissolve the oil and descend to the bottom of the receptacle, then introducing into the water a solvent comprising one or more of the following group metallic sodium and potassium and the oxides thereof to dissolve said incrustations, then introducing to the water a water soluble salt of greater density than water, to form therewith a liquid having a density greater than the density of the dissolved substances and thereby causing the latter to rise to the top of the liquid and permitting the oil solvent within the liquid to dissolve oil adhering to the wall of the receptacle.

5. A process for removing oil and incrustations and other impurities from a water receptacle having water therein and oil on the surface of the water consisting in introducin into the water receptacle, trichlorethylene to permit the same to partially dissolve the oil as it comes in contact therewith and descends to the bottom of the receptacle, then introducing sodium peroxide for attacking or dissolving such incrustations, then introducing potassium carbonate for increasing the density of the liquid abovethe density of the oil solvent and dissolved oil, and therebycausing the latter to rise to the top of such liquid and permitting the oil solvent to dissolve '105 the oil adhering to the wall of the receptacle and floating on the surface, then adding water to decrease the density of the liquid below that of the oil solvent and dissolved oil to cause the latter to descend to a desired level in the receptacle and then draining the liquid ofl at such a level.

6. A process for removing oil from a water receptacle having water therein and oil on the surface of the water, consisting in introducing into the Water receptacle trichlorethylene to permit the same to partially dissolve the oil as it comes in contact therewith and descend to the bottom of the receptacle, then introducing potassium carbonate into the receptacle for increasing the density of the liquid above the density of the oil solvent and dissolved oil, and thereby causing the latter to rise to the top of the liquid and permitting the oil solvent to dissolve the 2 oil adhering to the wall of the receptacle and floating on the surface of the liquid.

7 A process for removing oil and incrusta-' tions and other impurities from a Water receptacle having water therein and oil on the i surface of the water, consisting in introducing into the water receptacle trichlorethylene to permit the same to partially dissolve the oil as it comes in contact therewith and descend to the bottom of the receptacle, then introducing sodium peroxide into the liquid for attacking or dissolving the incrustations, then introducing potassium carbonate for increasing the density of the liquid above the density of the oil solvent and dissolved oil, and thereby causing the latter to rise to the top of the liquid and permitting the oil solvent to dissolve the oil adhering to the wall of the receptacle and floating on the surface.

8. A process for removing oil from a water receptacle having water therein and oil on the surface of the water, consisting in introducing intothe water receptacle trichlorethylene to permit the same to partially dis-v solve the oil as it comes in contact therewith and descend to the bottom of the receptacle, then introducing potassium carbonate into the receptacle for increasing the density of the liquid above the density of the oil solvent and dissolved oil, and thereby causing the latter to rise to the top of the liquid and ,permitting the oil solvent to dissolve the oil adhering to the wall of the receptacle and floating on the surface of the liquid,thenadding water to decrease the density of the liquid below that of the oil solvent and dissolved oil to cause the latter to descend in the receptacle.

In testimony whereof we aflix our signatures. v

' HUMBERT BIZZONI.

PHILIP LENT.