Terpene sulfonate hydrotropes

Details Terpene sulfonate hydrotropes Terpene sulfonate hydrotropes

C - Chemistry, Metallurgy

11

D

260/504, 134/3.2

C11D 3/34 (2006.01) C07C 143/20 (1985.01) C07C 143/22 (1985.01)

Patent

CA 1234391

ABSTRACT OF THE DISCLOSURE p-Menthane-7sulfonic acid and p-menthane-2-sulfonic acid and their alkali metal, alkaline earth metal, ammonium and alkylolammonium salts are disclosed. A method for increasing the solubility of an only partially water-soluble material is presented comprising combining the material in water with the salts of p- menth-6-ene-2-sulfonic acid, p-menth-1-ene-7-sulfonic acid and their saturated derivatives as hydrotropes. p-menth-6-ene-2-sulfonate salts are prepared from alpha- pinene and sulfite or bisulfite salt in the presence of a phase transfer catalyst under free radical conditions. Salts of four alpha- en beta-pinene derived sulfonates have been indentified as effective hydrotropes in aqueous media. These compounds are identified by their struc- tural formulas below; Image where M is an alkali metal, alkaline earth metal, ammonium or alkylolammonium cation.

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