| About 1830 |
Several lime burners from the Eifel found a company and set up a ring kiln |
| 1934 |
Peter Neuendorf from Pelm sets up a small shaft kiln |
| 1960 |
Foundation of the Akdolit-Werke GmbH; set-up of a small manufacturing plant for water treatment and filtration products in Pelm |
| 1980 |
Complete takeover by the Wülfrather group |
| 1990 |
Pelmer Kalkwerk Neuendorf KG is taken over as a subsidiary by Akdolit-Werk GmbH |
| 1994 |
Re-naming to Akdolit GmbH |
| 2000 |
Re-naming to Rheinkalk Akdolit GmbH & Co. KG |