| 摘要 |
Alkanol alkoxylates, useful, for example, as nonionic surfactants, are prepared in accordance with the invention by reacting at least one alkanol having 8 to 18 carbon atoms with at least one alkylene oxide having 2 to 4 carbon atoms at alkaline pH and in the presence of one or more soluble calcium compounds, and reducing the pH of the resulting alkoxylation mixture to 7 or below by addition thereto of an acid comprising propionic acid, benzoic acid or a mixture of propionic and benzoic acids. |
