| 摘要 |
A process is described for preparing quaternary ammonium hydroxides of improved purity. In one embodiment, the present invention relates to a process of preparing quaternary ammonium hydroxides from the corresponding quaternary ammonium salts in an electrolytic cell which comprises an anolyte compartment containing an anode and a catholyte compartment containing a cathode and water, said anolyte and catholyte compartments being separated from each other by a cation-exchange membrane, said process comprising the steps of (a) providing the catholyte compartment with a cathode of zinc, cadmium, tin, lead, or alloys thereof, mercury, or mercury amalgam, (b) charging an aqueous solution containing a quaternary ammonium salt to the anolyte compartment, (c) passing a current through the electrolytic cell to produce quaternary ammonium hydroxide in the catholyte compartment, and (d) recovering the quaternary ammonium hydroxide from the catholyte compartment. |
