| abstract |
PURPOSE: A catalyst useful for preparing a polyethylene glycol dialkyl ether from a polyethylene glycol monoalkyl ether, obtained by supporting nickel and rhenium on a γ-alumina carrier. n CONSTITUTION: A polyethylene glycol monoalkyl ether shown by the formula I (R is ≤4C alkyl; n≥2) is reacted with hydrogen in the presence of a catalyst obtained by supporting nickel and rhenium on a γ-alumina carrier (preferably having 100W250m 2 /g specific surface area) (preferably catalyst having 5W50wt% nickel based on γ-alumina carrier, and an atom ratio of nickel to rhenium of (1:0.005)W(1:0.3), to give a polyethylene glycol dialkyl ether shown by the formula II. n EFFECT: Improving the yield of a polyethylene glycol dialkyl ether. n COPYRIGHT: (C)1985,JPO&Japio |