Process for manufacture of fatty acid esters of hydroxy sulfonat

Details Process for manufacture of fatty acid esters of hydroxy sulfonat Process for manufacture of fatty acid esters of hydroxy sulfonat

1983-11-09

1985-08-20

Sneed, Helen M. S.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C14390, C11D 128

Patent

active

045363382

ABSTRACT:
A method is disclosed for preparing fatty acid isethionate soaps through direct esterification wherein the catalyst is quenched by an alkaline compound at the end of the esterification. Quenching inhibits transesterification between isethionate and later added stearic acids. Transesterification is undesirable impairing lather and bar soap firmness. The traditional stripping of lower molecular weight fatty acids is no longer necessary where low ratios of fatty acids to isethionates are utilized. Alternatively, stripping can be avoided with traditional molar ratios provided water co-distillate fatty acid is not recycled. Finally, it has been shown that zinc catalyzed reactions provide optimum yield and low corrosion at pH about 2.0 to 2.5.

REFERENCES:
patent: 1860092 (1932-05-01), Graves
patent: 3320292 (1967-05-01), Cahn et al.
patent: 3383396 (1968-05-01), Cahn et al.
patent: 3420857 (1969-01-01), Holland et al.
patent: 3420858 (1969-01-01), McCrimlisk
patent: 4369144 (1983-01-01), Lamberti et al.
patent: 4405526 (1983-09-01), Lamberti et al.
"Organic Reactions with Boron Fluoride. XX. Acidolysis of Esters", J. Amer. Chem. Soc., vol. 60, pp. 654-658, (1938).

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