UNITED STATES PATENT OFFICE. WILLIAM GODSON LITTLE, OF EAST GRINSTEAD, ENGLAND. CLEANSING FLUID AND SHIEEP-DP. 992,220. Specification of Letters Patent. Patented May 16, 1911. No Drawing. Application filed July 2, 1910. serial No. 570,166. the whole is again heated as described above To all whom it may concern: until a clear liquid is obtained. The prod Be it known that I, WILLIAM GoDsoN LIT lict is a transparent liquid containing over TLE, a subject of the King of Great Britain, 80 percent. of coal tar distillates and adapt residing at Brockhurst, East Grinstead, in ed to form a very permanent emulsion with 55 the county of Sussex, England, chemical water. . . manufacturer, have inyented a certain new Ilaving thus described my invention and and useful Cleansing Fluid and Sheep-Dip, the best means I know of carrying the same of which the following is a specification. into practical effect, I claim:-- Cleansing fluids for use as sheep dips, for 1. A process of manufacturing a cleansin 60 10 disinfecting or like purposes, as sold to the fluid, which process consists in mixing coa consumer, generally consist of concentrated. tar creosote with hydrous castor oil soap and solutions or emulsions of certain distillates heating the mixture until a clear liquid is of coal. tar, preferably those heavier than obtained. water and known commercially as creosote. 65 5 The consumer dilutes this fluid with water 2. A process of manufacturing a cleansing in which the creosote remains suspended. fluid, which process consists in heating to Many agents have been used for dissolving gether castor oil and alkali lye until saponi or emulsifying coal tar creosote in water for fication is complete, then introducing coal this purpose, most of them consist of some tar creosote and then heating the mixture 70 20 kind of soap, rosin soap being generally pre until3. Aa processclear liquid of manufacturing is obtained. a cleansing ferred. In British specification No. 26608 fluid, which process consists in heating to of 1907 is recommended sulfonated castor oil gether equal weights of castor oil and caustic for the purpose. soda solution of 1.15 specific gravity at a According to the present invention saponi temperature of 200° F. until frothing ceases, 75 25 fied castor oil is used for making the solution then adding coal tar creosote equal to four of coal tar distillate, it having been discov times the weight of the soap produced by ered that by means of this agent there can the saponification and then heating the be obtained an emulsifiable fluid containing whole until a clear liquid is obtained: a considerably higher proportion of the dis 4. A cleansing fluid for use as a sheep dip, 80 30 tillate, than is the case when other soaps are for disinfecting and for like purposes, con used, and that the emulsion made by dilut sisting of a clear liquid which forms with ing this fluid with water is more permanent. water a permanent emulsion and consists of I prefer to use caustic soda for saponifying a mixture of coal tar creosote and hydrous theThe castor following oil. example illustrates . the . in castor oil soap. 8. r as vention :-11 cwts. (112 pounds) of castor 5. A cleansing fluid for use as a sheep dip, oil are introduced into a steam-jacketed for disinfecting and for like purposes, con pan and to this are added 11 cwts. of caustic sisting of a clear liquid which forms with soda solution of 1.15 specific gravity. The water a permanent emulsion and consists of 90 40 mixture is heated to about 2008. F. and a mixture of coal tar creosote and hydrous stirred until frothing ceases. A sample is castor oil soap, containing at least 80 per now tested to see if the saponification is cent. of coal tar creosote. complete, that is to say, if the simple is In testimony whereof I have signed my soluble in water. If not, the heating is con name to this specification in the presence of 45 tinued, if necessary with addition of more two subscribing witnesses. soda. It is essential that the soda should be WILLIAM GODSON LITTLE. creosotein slight substantiallyexcess. An equalamount to offour coal. times tar Witnesses: the weight of the soap in the pan, namely, JosFPH MILLARD, 50 about 9856 lbs. of creosote, is now added and W. J. SKERTEN.