| 摘要 |
Process for isolating paraffinsulfonate from the extracts obtained on sulfoxidating n-paraffins by first of all separating off the bulk of the paraffin by adding alcohol at about 5 DEG -55 DEG C., then adding an amount of alkali required for neutralization in such a way that pH 7 is not undershot, separating off the precipitated alkali metal sulfate, distilling the alcohol out of the remaining paraffinsulfonate solutions, and concentrating the aqueous solution of the paraffinsulfonate by continuously introducing it into an evaporator in which the temperature should never drop below 130 DEG C. from when the paraffinsulfonate solution is started to be introduced throughout the entire period for the evaporation of water.
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