发明名称 |
A process for the preparation and fractionation of a mixture of dimethyl ether and chloromethane with water as extractant. |
摘要 |
Production and separation of a mixture of dimethyl ether (I) and chloromethane (II) comprises (a) reacting methanol (MeOH) with excess hydrogen chloride (HCl); (b) reacting the mixture from (a) with excess MeOH; (c) passing the mixture from (b) to an extractive distillation column (EDC); (d) adding water as extractant in the upper zone of the column; (e) discharging (II) at the top of the column; (f) discharging a mixture of water, MeOH and (I) from the sump and passing this to a first distillation column (DC-1); (g) discharging (I) from the top of this column; (h) discharging a mixture of water and MeOH from the sump; (i) feeding the mixture from (h) to a second distillation column (DC-2); (k) taking pure MeOH from the top of DC-2; (l) taking water from the sump of DC-2; and (m) passing the MeOH from stage (k) to stages (a) and (b). |
申请公布号 |
ZA9705578(B) |
申请公布日期 |
1997.12.29 |
申请号 |
ZA19970005578 |
申请日期 |
1997.06.24 |
申请人 |
HOECHST AKTIENGESELLSCHAFT |
发明人 |
PETER ROTH;ERHARD LEISTNER;HANS HAVERKAMP |
分类号 |
B01D3/40;C07C17/16;C07C17/38;C07C17/386;C07C19/03;C07C41/01;C07C41/09;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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