Degussa Aktiengesellschaft

Gunther Prescher

Axel Kleemann

Heinz Friedrich

Helmut Beschke

Rainer Siegmeier

Helmut Maurer

Bergstein Wolfgang

Wolfgang Bergstein

The continuous production of 1,2-diols by means of saponification of aliphatic, linear or branched epoxides with 8-30 carbon atoms or high molecular weight cycloaliphatic epoxides with water and acidic catalyst at pressures of 1-5 bar using a vapor-liquid mixture of a solubilizing agent which is stationary in a column. The yields obtained are high and exhibit a high degree of purity. The water added can be recycled as such.

Continuous method for the production of 1,2-diols

For the catalytic reaction of 2-methylpyrazine with ammonia and oxygen to form 2-cyanopyrazine there are used compounds of the elements antimony, vanadium, and oxygen and at least one of the elements iron, copper, titanium, cobalt, manganese, and nickel, whereby the atomic ratio of antimony to vanadium is greater than 1 and which contain besides these compounds a lattice layer silicate and a highly dispersed silica. These catalysts are very selective and result in high yields and high space-time-yields.

Catalysts for the production of 2-cyanopyrazine

Growing community of inventors

Hanau, Germany

Gunther Prescher