Anthracene & Carbazole

At its Castrop-Rauxel site, the Aromatic Chemicals business line operates a unique, state-of-the-art plant using the highly innovative, high-temperature melting crystallization process for the solvent-free extraction of anthracene and carbazole from coal tar.

Our tar dyes

Carbazole and anthracene are polycyclic aromatics which can practically only be produced from coal tar (apart from uneconomic synthesis routes). Anthracene is needed for the production of anthraquinone which is used by the paper industry as a bleaching agent for pulp and in the dye industry as a dyestuff precursor. Carbazole is a key raw material for the high-performance pigment violet 23 and for the denim dye Hydron Blue, which are widely used in car varnishes, repair varnishes, printing inks, textiles and polymers.

A substance with heritage

Coal tar contains approximately 1.3% anthracene and 0.9% carbazole. After tar distillation, both substances are concentrated in the anthracene oil fraction. Anthracene was first isolated from coal tar by Auguste Laurent and Jean Dumas back in 1832. It crystallizes in colorless to yellowish flakes that fluorescence violet and sublime easily. Carbazole was discovered and identified in coal tar by Carl Graebe and Carl Glaser in 1872. Carbazole is a yellowish solid that also sublimes easily.

So that we can optimally respond to our customers and the needs of the market, RÜTGERS is subdivided into seven lines of business: Basic Aromatics, BTX/PA, Handy Chemicals, Resins & Modifiers, Aromatic Chemicals, Trading and InfraTec.

Find out more about the business line: Aromatic Chemicals

Dr. Olaf Uhde

Tel.: +49 2305 705-363
Fax: +49 2305 705-186

Our claim: tailor-made

  • Longstanding partnerships with our customers
  • Tailor-made solutions
  • Continual product development