Mg Technologies Ag

Lurgi Ag

Helmuth Domes

Thomas Gutermuth

Volker Franz

Lutz Urban

Herbert Feisel

A process for catalytically generating organic substances by partial oxidation of an organic feedstock in the presence of molecular oxygen at temperatures in the range from 200 to 500&#xb0; C. in at least one cooling-tube reactor, wherein 40 to 100 wt-% of the total amount of catalyst is disposed as a coating on the outside of the cooling tubes.

Process for catalytically producing organic substances by partial oxidation

Process for generating a homogeneous gas mixture of o-xylene and air for the production of phthalic anhydride wherein o-xylene is completely evaporated in the absence of oxygen, superheated and then mixed with air and supplied to a phthalic anhydride reactor.

Process of generating o-xylene-air mixtures for the production of phthalic anhydride

To improve the columns used so far for producing phthalic anhydride, and to make them less expensive and easier to install, it is proposed that in the column for concentrating phthalic anhydride two distillation stages are arranged, wherein the removal of the low-boiling components of the crude phthalic anhydride by distillation is effected in the first distillation stage () and the separation of the high-boiling components from the pure phthalic anhydride is effected in the second distillation stage (), both distillation stages being arranged side by side and being separated from each other by a vertical wall (), and that the bottom () of the first distillation stage () is connected with the bottom () of the second distillation stage ().

Growing community of inventors

Obertshausen, Germany

Helmuth Domes