Process for solid alkali metal salts of .alpha. sulfofatty...

Details Process for solid alkali metal salts of .alpha. sulfofatty... Process for solid alkali metal salts of .alpha. sulfofatty...

C - Chemistry, Metallurgy

07

C

260/494.5

C07C 303/32 (2006.01) C07C 309/17 (2006.01) C11D 1/28 (2006.01) C11D 13/06 (2006.01) C11D 17/06 (2006.01)

Patent

CA 1289149

ABSTRACT OF THE DISCLOSURE For the production of solid, substantially anhydrous alkali metal salts of .alpha.-sulfofatty acid alkyl esters containing from 8 to 22 carbon atoms in the fatty acid chain and from 1 to 6 carbon atoms in the ester alkyl radical, solid or molten .alpha.-sulfofatty acid alkyl esters are simultaneously mixed with an aqueous solu- tion of hydrogen peroxide or an H2O2-yielding compound and with solid alkali metal carbonate at a temperature of from 20 to 80°C, optionally in the presence of aqueous alkali metal hydroxide, the ratio by weight of ester to H2O2 being from 1:0.01 to 1:0.06 and the molar ratio of ester to alkali metal carbonate being in the range of from 1:0.5 to 1:0.75, the foam formed through the release of CO2 is mechanically destroyed under a pressure of from 0.2 to 1.0 bar and at a temperature of from 50 to 70°C, and the product formed is residually degassed and residually dehydrated under a pressure of from 15 to 50 mbar and a temperature of from 50 to 80°C.

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