Ruhrchemie is a chemical company founded in 1927/28. The company, based in the Holten district of Oberhausen, is now the German headquarters of the OQ (company). It is now formally known as OQ Werk Ruhrchemie. For a short time at the beginning of the 20th century, one of the first German airports seemed to be built in the Holtener Bruch, which had been largely drained by the canalization of the Emscher river. However, it remained with air shows and training flights; the course and outcome of the First World War prevented the airport project from being realized. Instead, the area was used for industrial purposes at the end of the 1920s. More information...
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