发明授权
- 专利标题： In situ conductimetric end point determination of the oxyethylation of phenolic compounds
- 专利标题（中）： 酚类化合物的氧乙基化的原位电导终点测定
-
申请号： US68710申请日： 1979-08-22
-
公开(公告)号： US4249024A公开(公告)日： 1981-02-03
- 发明人: David C. Sanders
- 申请人： David C. Sanders
- 申请人地址： IN West Lafayette
- 专利权人： Great Lakes Chemical Corp.
- 当前专利权人： Great Lakes Chemical Corp.
- 当前专利权人地址： IN West Lafayette
- 主分类号： C07C41/03
- IPC分类号： C07C41/03 ; C07C43/23
摘要：
The present invention discloses an improved method for the in situ end point determination of the oxyethylation of phenols. In the present invention, the oxyethylation reactions occur in the presence of catalysts and at temperatures in excess of 100.degree. C. The reaction end point is monitored by continuous measurements of the electrical conductivity of the reaction mixture and the reaction is terminated when a preselected rate of change of conductance is attained.The method of the present invention may be used with complex phenolic systems wherein alkali metal hydroxides, quarternary ammonium salts, or alkali metal alkoxides are used as oxyethylation catalysts.
公开/授权文献
- USD405170S Combined air conditioning and heating unit housing 公开/授权日：1999-02-02
信息查询
