| 摘要 |
<p>The invention relates to a method for purifying off-gases from a high-pressure melamine-producing installation, with formation of melamine intermediates. According to the inventive method, the off-gases are brought into contact, in a first step, with circulatory melted massed of urea containing melamine intermediates and NH3, and, in a second step, with a fresh melted mass of urea.</p> |
