| 摘要 |
<p>A process for preparing an ±-sulpho-fatty acid ester salt surfactant comprises the following steps: (1) sulfonating a fatty acid ester with SO 3 to produce a crude sulphonic acid, (2) bleaching the crude sulphonic acid from step (1) with hydrogen peroxide; (3) subjecting the product of step (2) to a secondary esterification using an alcohol; (4) neutralising the product of step (3) with a base; and (5) drying the product from step (4) to obtain a powdery product.</p> |
