WeylChem Höchst GmbH

WeylChem Höchst is located in the Industrial Park of Höchst in the vicinity of Frankfurt. The geographic location allows for quick access to the most efficient mode of transportation (road, rail, river, airport). All production plants use the secure and efficient infrastructure (energy, waste water treatment, site security) of well developed chemical sites.

WeylChem Höchst is specialized in continuous photo chlorination of the methyl side chain of chlorotoluenes, and continuous clean catalytic oxidation reactions. The one key technology of WeylChem Höchst is Side Chain Chlorination which is performed by  four Chlorination lines, two hydrolysis lines and various distillation units mainly for agrochemical, pharma or specialty chemical customers. The second key technology is the oxidation process which is performed continuous e.g. in bubble column reactors.

VP3 Plant

Main reactions

  • UV radical chlorination
  • Hydrolysis


Side Chain Chlorinated Products

  • Substituted Benzylchlorides (-CH2Cl)
  • Substituted Benzalchlorides (-CHCl2)
  • Substituted Benzotrichlorides (-CCl3)

Hydrolyzed Products

  • Substituted Benzaldehydes (-CHO)
  • Substituted Benzoylchlorides (-COCl)

VP5 Plant

Main reactions

  • Oxidations with O2 to carboxylic acids: 2 continuous dedicated lines with column/bubble reactors (stainless steel)
  • Esterification & anhydrides: several stirred vessels (3 – 6 m³, stainless steel)
  • Sulfonating: 1 continuous line in a dedicated plant

Work-up/purification technologies:

  • Distillation
  • Melt crystallization


  • Crotonic acid “CA”
  • Methoxyacetic acid “MAA”
  • Dimethylacrylic acid “DMAA””
  • Crotonic acid methyl ester “CAM”
  • Crotonic acid anhydride “CAA”
  • Dimethylacrylic acid methyl ester “DAME”
  • Maleinic acid monoisooctyl ester “MOM”
  • Sodium vinylsulfonate “VSN”



1863 Chemische Fabrik Meister Lucius & Co. starts dyestuff production west of Höchst
1925 Merger into IG Farbenindustrie AG
1951 Establishment of Farbwerke Hoechst AG
1997 Acquisition of the Specialty Fine Chemicals business to Clariant AG
2007 Acquired by ICIG and creation of the WeylChem Group of Companies

Bildnachweis: Infraserv GmbH & Co. Höchst KG


Industriepark Höchst
Brüningstraße 50
65929 Frankfurt am Main

Phone +49 69 4109-2230
Fax +49 69 4109-2100


Wolfgang Böhm

Sales & Marketing