发明名称 |
Process for the preparation and fractionation of a mixture of dimethyl ether and chloromethane with methanol as extractant |
摘要 |
This invention relates to a process for the preparation and fractionation of a mixture of dimethyl ether and chloromethane by extractive distillation with methanol as extractant. The mixture is prepared by reacting methanol with hydrogen chloride. The mixture is then distilled to remove water and is subsequently subjected to an extractive distillation with methanol as extractant, with chloromethane resulting as top product. In another distillation step, the remaining dimethyl ether is separated from the methanol.
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申请公布号 |
US5763712(A) |
申请公布日期 |
1998.06.09 |
申请号 |
US19970880608 |
申请日期 |
1997.06.23 |
申请人 |
HOECHST AKTIENGESELLSCHAFT |
发明人 |
ROTH, PETER;LEISTNER, ERHARD;WENDEL, WOLFGANG |
分类号 |
B01D3/40;C07C17/16;C07C17/38;C07C17/383;C07C19/03;C07C41/01;C07C41/42;C07C43/04;(IPC1-7):C07C17/00;C07C41/00 |
主分类号 |
B01D3/40 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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