发明名称 |
A process for the preparation and fractionation of a mixture of dimethyl ether and chloromethane with methanol as extractant. |
摘要 |
Preparation and separation of a mixture of dimethyl ether and chloromethane is effected by: (a) reacting MeOH with an excess of HCl; (b) treating the mixture obtained with an excess of MeOH and distilling in a first column with removal of water at the sump and a MeOH/Me2O/MeCl mixture at the top; (c) treating the mixture in an extractive distillation column which has MeOH added as extractant at the upper part while drawing off an MeOH/Me2O mixture at the sump and MeCl at the top; (d) distilling the MeOH/Me2O mixture in a second column with removal of MeOH at the sump and Me2O at the top; and (e) recycling part of the MeOH obtained in step (d) back to steps (a) and (b) and part back to the upper part of the extraction column as extractant. |
申请公布号 |
ZA9705579(B) |
申请公布日期 |
1997.12.29 |
申请号 |
ZA19970005579 |
申请日期 |
1997.06.24 |
申请人 |
HOECHST AKTIENGESELLSCHAFT |
发明人 |
PETER ROTH;ERHARD LEISTNER;WOLFGANG WENDEL |
分类号 |
B01D3/40;C07C17/16;C07C17/38;C07C17/383;C07C19/03;C07C41/01;C07C41/42;C07C43/04 |
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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