| 摘要 |
<p>1384605 Pivalolactone HOECHST AG 8 June 1972 [8 June 1971] 26779/72 Heading C2C Pivalolactone (α,α- dimethyl - # - propiolactone) is prepared by thermally splitting acetic acid from #-acetoxy-pivalic acid in the presence of a catalyst comprising an alkali metal compound and/or an alkaline earth metal compound, and a carrier material, more than 50% of the pore volume of which carrier comprises pores having a diameter of from 100 to 1000 Š. The alkali or alkaline earth metal compound may be an oxide, hydroxide, bicarbonate, carbonate, or a salt of an organic carboxylic acid having up to four carbon atoms. A particularly suitable carrier is silicic acid.</p> |
