Manufacture of olefinically unsaturated aliphatic or cycloaliphatic hydrocarbons

摘要: Olefinically unsaturated aliphatic or cycloaliphatic hydrocarbons are manufactured by bringing alkanecarboxylic acids of 3 to 20 carbon atoms, alkanedicarboxylic 4 atoms 5-membered 6-membered cycloalkanecarboxylic their alkyl, cycloalkyl, aralkyl phenyl esters, in the gas phase, at from 250° 800° C., into contact with catalysts which active composition consists boron trioxide, boric acid and/or nitride, together one more oxides aluminum, silicon, tin, lead, titanium and zirconium.