| 摘要 |
The invention relates to a process for preparing sulphuric methacrylamide from acetone cyanohydrin. This process for preparing sulphuric methacrylamide comprises: a) a mixing step, in which acetone cyanohydrin is mixed with sulphuric acid; b) a stoving step; c) a step of adding further acetone cyanohydrin; d) another stoving step; e) optionally, one or more additional step(s) of further addition of acetone cyanohydrin followed by an additional stoving step; and f) optionally, a final stoving step. It is characterized in that sulphur trioxide is also introduced in step c) and/or just after this step c) and/or, where appropriate, in one or more of the additional steps of further addition e) and/or just after this or these step(s) e). The invention also relates to a device for carrying out this process.
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