| 摘要 |
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 simltaneously mixed with an aqueous solution of hydrogen peroxide or an H2O2-yielding compound and with solid alkali metal carbonate at a temperature of from 20 DEG to 80 DEG C. optionally in the presence of aqueous alkali metal hydroxide, the ratio by weight of ester of 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 DEG to 70 DEG 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 DEG to 80 DEG C. |
