| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a method for removing water from an aldehyde-containing solution.SOLUTION: There is provided a method for separating a formaldehyde-containing product from a formalin solution containing formaldehyde, water and methanol, wherein the formaldehyde-containing product contains substantially less water than the formalin solution and the method comprises distilling the formalin solution in the presence of a water-containing compound, especially methyl propionate or methyl methacrylate. The formaldehyde-containing product is suitable for use in a further treatment which requires a source of formaldehyde containing a relatively small amount of water. One example of such a method is a reaction of methyl propionate with formaldehyde and methanol in the presence of a catalyst in order to produce methyl methacrylate.</p> |
