Bayer Aktiengesellschaft

Paul R Wambach, Deceased

Gerd-Michael Petruck

Adolf Wissner

Kurt Klinkmann

A process for the preparation of 2-chlor-4-nitrotoluene is disclosed by chlorination of 4-nitrotoluene in the presence of iodine. The resultant 2-chloro-4-nitrotoluene is a valuable intermediate for the preparation of herbicides.

Process for the preparation of 2-chloro-4-nitrotoluene

The invention relates to a process for purifying, by treatment with an acid ion exchanger and, if desired, a basic ion exchanger, the methanol employed in the preparation of formaldehyde.

Process for purifying the methanol employed in the preparation of

1,3,5-Trichlorobenzene is prepared by the isomerization of other trichlorobenzenes at an elevated temperature after the addition of aluminum trichloride and formic acid.

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Leverkusen, Germany

Paul R Wambach, Deceased