Invention Grant
US08766010B2 Method for distilling mixtures comprising ethylenediamine, N-methylethylenediamine, and water, and mixtures of ethylenediamine and N-methylethylenediamine having a low content of N-methylethylenediamine obtainable thereby
有权
蒸馏含有乙二胺，N-甲基乙二胺和水的混合物的方法以及由此得到的具有低含量的N-甲基乙二胺的乙二胺和N-甲基乙二胺的混合物
- Patent Title: Method for distilling mixtures comprising ethylenediamine, N-methylethylenediamine, and water, and mixtures of ethylenediamine and N-methylethylenediamine having a low content of N-methylethylenediamine obtainable thereby
- Patent Title (中): 蒸馏含有乙二胺，N-甲基乙二胺和水的混合物的方法以及由此得到的具有低含量的N-甲基乙二胺的乙二胺和N-甲基乙二胺的混合物
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Application No.: US13513363Application Date: 2010-11-30
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Publication No.: US08766010B2Publication Date: 2014-07-01
- Inventor: Michael Jödecke , Jörg Pastre , Randolf Hugo
- Applicant: Michael Jödecke , Jörg Pastre , Randolf Hugo
- Applicant Address: DE
- Assignee: BASF SE
- Current Assignee: BASF SE
- Current Assignee Address: DE
- Agency: Drinker Biddle & Reath LLP
- Priority: EP09177776 20091202
- International Application: PCT/EP2010/068469 WO 20101130
- International Announcement: WO2011/067226 WO 20110609
- Main IPC: C07C209/84
- IPC: C07C209/84 ; C07C209/86
Abstract:
The present invention relates to a mixture of ethylenediamine (EDA) and N-methylethylenediamine (Me-EDA) with a low content of Me-EDA, which comprises at least 99.5% by weight of ethylenediamine, and wherein the concentration of N-methylethylenediamine is in the range from 0.005 to 0.15% by weight.The present invention further relates to a process for distillative workup of a mixture comprising EDA, Me-EDA and water, by introducing the mixture into a distillation column which is operated at a column top pressure of 10 mbar to 4 bar, wherein the weight ratio of water to ethylenediamine in the mixture used is a*X:Y where X is the proportion by weight of water and Y is the proportion by weight of ethylenediamine at the azeotropic point of a binary mixture of water and ethylenediamine at the column top pressure in question, and a is a real number with a value of 0.9 or more.The present invention further provides a process for preparing a distillable mixture comprising EDA, Me-EDA and water, which is suitable for preparing EDA with a low Me-EDA content.
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