发明授权
- 专利标题： Process for making alkoxylated piperazine compounds
- 专利标题（中）： 制备烷氧基化哌嗪化合物的方法
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申请号： US14238338申请日： 2012-08-24
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公开(公告)号： US09169222B2公开(公告)日： 2015-10-27
- 发明人: Christophe R. Laroche , Daniel A. Aguilar
- 申请人： Christophe R. Laroche , Daniel A. Aguilar
- 申请人地址： US MI Midland
- 专利权人： Dow Global Technologies LLC
- 当前专利权人： Dow Global Technologies LLC
- 当前专利权人地址： US MI Midland
- 国际申请： PCT/US2012/052179 WO 20120824
- 国际公布： WO2013/032874 WO 20130307
- 主分类号： C07D295/088
- IPC分类号： C07D295/088 ; C07D241/04
摘要：
The present invention relates to an improved process for making mono- and di-alkoxylated piperazine compounds especially dihydroxyethylpiperazine. The improvement comprises the addition of an acid to the piperazine compound prior to the addition of an alkylene oxide to a reactor wherein the alkoxylated piperazine compound is prepared. Said improvement reduces the concentration of undesirable glycol ether byproducts which contribute undesirable color and foaming of the alkoxylated piperazine compounds.
公开/授权文献
- US20140256944A1 PROCESS FOR MAKING ALKOXYLATED PIPERAZINE COMPOUNDS 公开/授权日：2014-09-11
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