Patent GB-634499-A (GB)
Title: Methods and agents for preparing aqueous solutions of water-insoluble substances
IPC: C09K23/00
Filed: 1947-01-06
Abstract: Clear, transparent aqueous solutions of water-insoluble organic substances which may be dissolved unchanged in sulphated butyl oleate or a salt thereof are prepared by mixing the substance in liquid form with the said butyl oleate or salt and adding the resulting fluid mixture to water.  Specified salts are the ammonium, sodium and potassium salts.  The use of the triethanolamine and morpholine salts is also referred to but not claimed.  Specified water-insoluble substances are 1,1,1-trichloro-2,2 - bis (4 - chlorophenyl) - ethane, dibutylphthalate, dimethyl phthalate, para-dichlorobenzene, 4,41-dichlorobenzophenone, 2,41-dichlorobenzophenone, oleic acid, butyl stearate, "Thanite" medicinal paraffin, dibenzyl ether, benzyl alcohol, nitrobenzene, camphor, pentachlorophenol, methyl isobutyl ketone, solvent naphtha, di-(n-butoxyethyl)-phthalate, gammahexachloro - cyclohexane, dinitro - ortho - cresol, monoglycerides of fatty acids, fast red scarlet 111, and eucalyptus oil.  If the compositions have a high content of certain of the water-insoluble substances, e.g. D.D.T., solutions are obtained containing a proportion of the substance in finely-divided suspension.  The solutions may also be converted into finely-divided suspensions by the addition of salt or small amounts of multivalent ions such as those of calcium, magnesium or iron.  The Specification as open to inspection under Sect. 91 comprises also the use of other sulphated unsaturated fatty esters instead of the sulphated butyl oleate, or the salts of such esters.  This subject-matter does not appear in the Specification as accepted.ALSO:Clear, transparent aqueous solutions of water insoluble organic substances which may be dissolved unchanged in sulphated butyl oleate or a salt thereof are prepared by mixing the substance in liquid form with the said butyl oleate or salt and adding the resulting fluid mixture to water. Specified salts are the ammonium, sodium and potassium salts.  The use of the triethanolamine and morpholine salts is also referred to but not claimed.  Specified water-insoluble substances are 1, 1, 1-trichloro-2, 2-bis (4-chlorophenyl)-ethane, dibutylphthalate, dimethylphthalate, paradichlorobenzene, 4, 41-dichlorobenzophenone, 2, 41-dichlorobenzophenone, oleic acid, butyl stearate, "Thanite" medicinal paraffin, dibenzyl ether, benzyl alcohol, nitrobenzene, camphor, pentachlorophenol, methyl isobutyl ketone, solvent naphtha, di-(n-butoxyethyl) phthalate, gamma-hexachloro - cyclohexane, dinitro - ortho - cresol, monoglycerides of fatty acids, fast red scarlet 111, and eucalyptus oil.  If the compositions have a high content of certain of the water-insoluble substances, e.g. D.D.T. solutions are obtained containing a proportion of the substance in finely divided suspension.  The solutions may also be converted into finely divided suspensions by the addition of salt or small amounts of multivalent ions such as those of calcium, magnesium or iron.  The Specification as open to inspection under Sect. 91 comprises also the use of other sulphated unsaturated fatty esters instead of the sulphated butyl oleate, or the salts of such esters.  This subject-matter does not appear in the Specification as accepted.