Патент USA US2403612код для вставки
Patented July 9, 1946 I 2,403,612 UNITED STATES PATENT ' OFFICE 2,403,612 PROCESS FOR REMOVING GREASY DE POSITS FROM CONCRETE, WOOD, AND TILE SURFACES Robert L. Reynolds, _Washlngton, D. 0., and Harlan M. Rice, Syracuse, N. Y., assignors to The Solvay Process Company, New York, N. Y., a corporation of New York No Drawing. Application May 6, 1942, Serial No. 441,994 > 7' Claims. (01. 252_1’61)' 1 2 This invention relates to a \process for remov-v ing deposits of an oily, greasy waxy Or asphaltlc nature, hereinafter referred. lto generically as process for effectively removing greasy deposits from surfaces soiled therewith. It is a more speci?c object of this invention to "greasy deposits," from surfaces soiled therewith, provide an e?ective garage ?oor cleaner capable more particularly to a process for removing grease 5 of cutting greasy deposits von concrete garage and dirt from concrete garage flbors. floors and of removing the deposits thus treated As is well known, concrete, wood and tile sur from the ?oors by ?ushing with water. faces frequently become soiled with greasy de We have made the surprising discovery that posits. This problem is particularly acute in the greasy deposits on surfaces soiled therewith may case of concrete garage ?oors, especially those of 10 be effectively removed by contacting the deposits large commercial garages, which quickly become with a composition comprising o-dichlorbenzene coated with deposits of grease and oil with which ‘ containing dissolved therein a substantially salt are intermixed considerable quantities of dirt. free water-soluble alkyl mononuclear aromatic These deposits, because of the comparatively sulfonate detergent, the alkylv side chain of which rough and porous nature of the concrete SUI“. 15 contains between 12 and 30 carbon atoms, and faces, adhere tenaciously to the ?oors and are then flushing the deposits from the surfaces with exceedingly di?icult to remove; however, it is water. We have found that our novel compo highly undesirable to permit them to remain on sitions cut the greasy deposits easily without ex the floors since they tend to accumulate and thus cessive scrubbing, thereby quickly disengaging the render the garage ?oors extremely slippery and 20 grease and dirt from the soiled surfaces in spite unsightly in appearance. Hence, for some time of the tenacious adherence normally displayed by there has been a demand for an effective garage such deposits;-furthermore, our compositions are ?oor cleaner. _ readily emulsi?able in water so that they may A satisfactory garage ?oor cleaner must be be washed from the surfaces by merely ?ushing capable of cutting the greasy deposit on the floor 25 with water. The compositions of our invention so as to loosen the grease and remove the 1116.are readily ?uid. and may be applied to‘ the greasy .posit, together with the "dirt incorporated there deposits by spraying in undiluted'form or emul - with, from the concrete surface; furthermore, a si?ed in from one to ten times their weight in satisfactory cleaner should vbe such .thatiafter ~ water; if a particularly heavy greasy deposit is to “application thereof to the garage ?oor, removal 30 be removed, we prefer to use our compositions thereof together with they grease and dirt'may in substantially undiluted form. Our composi ~ be accomplished by simply flushing the floor with ...tions arenot inflammableso thatno ?re hazard water. The cleaner should also ‘be ‘chemically. ispresented by their use. They are, therefore, inert toward the concrete. To .our knowledge .preeminently suited for removing greasy deposits " no materialsatisfying these requirements has as 35 from surfaces soiled therewith and are particu yet been provided. The use of alkaline deter gents such as soap, soda and the like has proved unsatisfactory since excessive scrubbing is re larly adapted for removing such deposits from concrete garage ?oors. > In preparing the compositions ‘employed in our invention, a substantially salt-free water-soluble posit. Organic solvents capable of dissolving the 40 alkyl mononuclear aromatic sulfonate, the alkyl side chain of which contains‘ between 12 and 30 grease also do not fill the above requirements carbon atoms, or a mixture of such substances, since they are almost universally insoluble in wa may be employed. Preferably, ‘mixtures of such ter, so that they cannot be successfully removed sulfonates are employed, obtainable by chlorinat from the floor by ?ushing with water, and since they generally, are in?ammable and, hence, pre 45 ing a petroleum hydrocarbon mixture having an average carbon content of between 12 and 30 sent a certain fire hazard on use. \ carbon atoms per molecule, e. g. kerosene or a The above discussion also applies to the re para?ln oil of the type commercially known .as moval of greasy deposits from surfaces such as “white oil,f’ condensing the chlorinated hydrocar wood and tile which may become soiled therewith 50 bon with a mononuclear aromatic compound, such quired before they effectively cut the greasy de since suchdeposits frequently adhere tenaciously to the soiled surfaces and cannot be satisfactorily removed with alkaline detergents or organic sol vents for reasons above mentioned. It is an object of this invention to provide a 55 as benzene or phenol, in the presence of alumi num chloride, suli’onating the mixture ofzalkyl aryl compounds thus produced to obtain a mix-_ ture of alkyl aryl sulfonic acids, neutralizing the alkyl aryl sulfonic acids thus obtained to form 2,403,612 3 a water-soluble alkyl aryl sulfonate mixture, and separating the bulk of the inorganic sulfates from the alkyl aryl sulfonates thus obtained in any suitable manner such as, for example, by ex tracting the sulfonates with alcohol to produce a substantially salt-free sulfonate detergent. Sub stantially salt-free alkyl aryl sulfonates, the alkyl side chains of which are derived from a petro leum source, are particularly suitable for use in our invention since the nature of their side chains 4 to those concerned with the removal of such greasy materials. Since certain changes in carrying out the above process and certain modi?cations in the compo sitions which embody the invention may be made without departing from its scope, it is intended that all matter contained in the above description shall be interpreted as illustrative and not in a limiting sense. We claim: 10 1. A process for removing a greasy deposit from a surface soiled therewith selected from the group consisting of concrete, wood and tile surfaces which comprises applying thereto a composition makes them readily soluble and compatible with o-dichlorbenzene. Alkyl aryl sulfonates of the type described are readily soluble in o-dichlor benzene to the extent of about 25%. comprising o-dichlorbenzene containing dissolved The amount of the substantially salt-free sul fonated detergent dissolved in the o-dichlorben therein between about 1% and about 25% of a water-soluble alkyl mononuclear aromatic sul fonate detergent substantially free of inorganic , zene may vary considerably since solutions con taining between about 1% and about 25% of the salts, the alkyl side chain of which contains be detergent have been found suitable; preferably, tween 12 and 30 carbon atoms, and then flushing 20 the greasy deposit from the surface with water. vention contain approximately 10% of the sul 2. A process for removing a greasy deposit from fonated detergent. As hereinabove pointed out, a surface soiled therewith selected from the group the compositions may be applied to the greasy consisting of concrete, wood and tile surfaces deposits to be removed in substantially undiluted which comprises applying thereto a composition form, particularly when exceedingly heavy greasy the compositions used in accordance with our in deposits are to be removed. comprising o-dichlorbenzene containing dissolved However, since we therei have found emulsions of the above compositions between about 1% and about 25% of a from soiled surfaces, these compositions may be applied in the form of emulsions containing one water-soluble alkyl mononuclear aromatic sul fonate detergent substantially free of inorganic salts, the alkyl side chain of which is derived from to ten times their weight of water. Application of the compositions of our inven tion to the greasy deposits to be removed may be 30 carbon atoms, and then flushing the greasy deposit from the surface with water. are also effective in removing greasy deposits a petroleum source and contains between 12 and ' accomplished in any suitable manner, such as, for 3. A process for removing a greasy deposit from deposits for a time sufficient to cut the grease benzene containing dissolved therein between other suitable manner, since the cleaner emul sifies the grease and dirt in the water and thereby thereto an aqueous emulsionv of a composition example, by spraying. These compositions are 35 a concrete garage floor which comprises apply ing thereto a composition comprising o-dichlor permitted to remain in contact with the greasy about 1% and about 25% of a mixture of water and thereby disengage it, together with the dirt soluble alkyl mononuclear aromatic sulfonates accumulated therewith, from the soiled surface; ordinarily between about one and about ten min 40 substantially free of inorganic salts, the alkyl side chains of which are derived from kerosene, utes of contact are suitable to effect this disen and then ?ushing the greasy deposit from the gagement. At the end of this time the cleaner ' floor with water. may be removed from the surface, together with 4. A process for removing a greasy deposit from the greasy deposits, by merely flushing the sur face with water by means of a hose or in any 45 a concrete garage-?oor which comprises applying comprising o-dichlorbenzene containing dissolved therein between about 1% and about 25% of a mixture of water-soluble alkyl mononuclear aro A preferred embodiment of this invention involves the use of our compositions for the removal of 50 matic sulfonates substantially free of inorganic salts, the alkyl side chains of which are derived greasy deposits from concrete garage ?oors since from kerosene, and then flushing the greasy de the properties of our compositions, as set forth posit from the floor with water. above, are such that such deposits may be re 5. A process for removing a greasy deposit from moved with particular facility, thus satisfying the demand for an effective cleaner for this purpose. 55 a concrete garage floor which comprises apply ing thereto a composition comprising o-dichlor The following example is illustrative of our in benzene containing ‘dissolved therein (between vention: about 1% and about 25% of a mixture of water A composition containing 90% o—dichlorben soluble alkyl benzene sulfonates substantially zene and 10% of a substantially salt-free alkyl permits substantially complete removal thereof. mononuclear aromatic sodium sulfonate, the al 60 free of inorganic salts, the alkyl side chains of which are derived from kerosene, and then ?ush kyl side chain of which is derived from kerosene, ing the greasy deposit from the ?oor with water. was sprayed on‘ a greasy concrete garage floor and permitted to remain in contact therewith for five minutes. At the end of this time the ma terial was removed by flushing with water, where 6. A process for removing a greasy deposit from a concrete garage floor which comprises apply 65 ing thereto an aqueous emulsion of a composi by the grease was substantially completely re moved from the concrete floor. From the above description it will be evident that our invention provides an eillcient and prac tical method of removing greasy deposits from 70 surfaces soiled therewith, particularly from con crete surfaces such as garage floors. In view of the ease with which our invention may be car ried out and in view of the economic nature of tion comprising o-dichlorbenzene containing dis solved therein between about l% and about 25% of a mixture of water-soluble alkyl benzene sul fonates substantially free of inorganic salts, the alkyl side chains of which are derived from kero sene, and then flushing the greasy deposit from the floor with water. 7. A process for removing a greasy deposit from a surface soiled therewith selected from the group our compositions, our invention will be of value 75 consisting oLconcrete, wood and tile surfaces 2,408,612 5 » i . s I v which comprises applying thereto a composition from a para?in oil of the type commercially comprising o-dichlorbenzene containing dissolved known as “white oil," and then ?ushing the therein between about-1% and about 25% or a greasy deposit from the surface with water. water-soluble alkyi mononuclear aromatic’ sul fonate detergent substantially free of inorganic 5 ROBERT L. REYNOLDS. salts, the alkyl side chain oi.’ which is derived ‘ ‘ HARLAN M. RICE.