N-ACYL AMINOALKANE SULFONATE SURFACTANTS AND DERIVATIVES THEREOF
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United States of America Patent
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Jun 27, 2024
app pub date -
Dec 6, 2023
filing date -
Dec 7, 2022
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A surfactant composition includes greater than 75 wt. % N-acyl aminoalkane sulfonate of formula (I). The surfactant composition is substantially free of solvent and NaCl. A process for preparation of a mixture comprising a N-acyl aminoalkane sulfonate surfactant includes combining (a) an aminoalkane sulfonic acid of formula (II) or (b) an anhydrous alkali salt of an aminoalkane sulfonic acid of formula (II), a waterless base, and a fatty alkyl ester of formula (III) to form the mixture including N-acyl aminoalkane sulfonate of formula (I). The process further includes increasing the temperature of the mixture to 190° C. or less, preferably 170° C. or less, more preferably 160° C. or less to form a reaction mixture; and continuously removing alkyl alcohol from the reaction mixture.
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