Error Evonik Industries’ chemical production site in Krefeld stretches across 17 hectares of land and employs about 550 people. The products range from superabsorbents for the personal hygiene industry all Evonik Industries’ chemical production site in Krefeld stretches across 17 hectares of land and employs about 550 people. The products range from superabsorbents for the personal hygiene industry all the way to specialty polymers for the agricultural, cable and packaging industries.