| 摘要 |
The subject-matter of the present invention relates in principle to a process for preparing alkyl esters of methacrylic acid, comprising at least the following steps: preparing acetone cyanohydrin from hydrocyanic acid and acetone in a first step, purifying the acetone cyanohydrin in a second step, preparing methacrylamide from acetone cyanohydrin in a third step, esterifying a reaction mixture comprising methacrylamide and at least one alkyl alcohol in the presence of a mixture of water and sulphuric acid to give alkyl methacrylates in a fourth step, and purifying the alkyl methacrylate in at least one further step, and also to an apparatus for performing this process. |
