Basf Se Corporation

Stephanie Mollner

Heinz-Josef Kneuper

Karl Ott

Helmut Schmidtke

Ralph Versch

Ronald Drews

Jan-Martin Loening

Jan-Martin Löning

Joerg Torsten Nickel

Silke Simon

Jörg Torsten Nickel

A process for preparing nitric acid by: catalytically oxidizing ammonia, to obtain a gas mixture containing NO and O; cooling and condensing the gas mixture, thereby further oxidizing NO with O, to obtain a gas stream containing NO/NOand an aqueous solution containing nitric acid; and countercurrently absorbing the NO/NOfrom the gas stream in an absorber with process water (HO), to obtain nitric acid and an NO-containing absorber offgas, wherein the water content of the nitric acid is regulated to a concentration in the range from 50 to 77.8% by weight and the NOcontent of the absorber offgas to a concentration in the range from 20 to 500 ppm, by continuously measuring the water content of the process air supplied to the catalytic gas phase oxidation and, as a function of this, adjusting the amount of process water (Q-HO) fed to the absorber.

Process for preparing nitric acid with a concentration in the range from 50 to 77.8% by weight

Process for the continuous preparation of N-ethyl-2-pyrrolidone (NEP) by reacting gamma-butyrolactone (GBL) with monoethylamine (MEA) in the liquid phase, wherein GBL and MEA are used in a molar ratio in the range from 1:1.08 to 1:2 an the reaction is carried out at a temperature in the range from 320 to 420&#xb0; C. and an absolute pressure in the range from 70 to 120 bar.

Process for continuously preparing N-ethyl-2-pyrrolidone (NEP)

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Mannheim, Germany

Stephanie Mollner