发明名称 |
Process for the preparation of N-alkyl-pyrrolidones |
摘要 |
A process for the production of N-alkylpyrrolidone from γ-butyrolactone and monoalkylamine in the liquid phase comprising the steps of: feeding monoalkylamine and γ-butyrolactone, in the absence of water or in the presence of less than about 1 wt % of water, to a reaction zone to form a reaction mixture; heating the reaction mixture; withdrawing a product stream from the reaction zone and passing the stream to a distillation zone comprising at least one distillation column operated at sub-atmospheric pressure; adding water to the distillation zone; isolating at least one overhead stream from the distillation zone comprising monoalkylamine, water and optionally N-alkyl-pyrrolidone and condensing the overhead stream against cooling water.
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申请公布号 |
US7834196(B2) |
申请公布日期 |
2010.11.16 |
申请号 |
US20050570179 |
申请日期 |
2005.06.01 |
申请人 |
DAVY PROCESS TECHNOLOGY LIMITED |
发明人 |
HENSMAN JOHN RICHARD;KHAMBATI RIYAZ EZZUDDIN |
分类号 |
C07D207/12;C07D207/26;C07D207/267;C07D307/20 |
主分类号 |
C07D207/12 |
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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