| 1858 |
Start of German potash mining industry |
| 1899 |
Establishment of a royal, Prussian salt mine at Bleicherode |
| 1903 |
First finished production - basis of the potash production has been the mining of hard salt, a mixture of potassium chloride, sodium chloride and sulphates. In the course of time, processes improved and the existing techology was modernized, so that production increased year by year |
| 1970-1978 |
The depletion of hard salt stocks was foreseeable, thus necessitated new technologies of mining and processing. The realization to only use the carnallite in the long run, led to the development of selective carnallite leaching and the respective processing technology. Roots of DEUSA International go back to the year of 1890 |
| 1976 |
Start of drilling as a part of the exploration program |
| 1978 |
Start of small-scale testwork in the underground of the conventional mine Bleicherode |
| 1979 |
Construction of the first productive well |
| 1981 |
Start of research and developement activities at the Kehmstedt site |
| 1985 |
Start hot leaching operation |
| 1988 |
Inauguration of the processing plant |
| 1993 |
Foundation of Deusa Solbergwerke und Aufbereitungs GmbH |
| 1995 |
Commissioning oft he Power station and the magnesium chloride plant |
| 1996 |
Installation a new facility for the production of „Bischofite“ (firm magnesium chloride) |
| 2001 |
Takeover of Deusa Solbergwerke und Aufbereitungs GmbH by DEUSA International GmbH, large investments funded by the new shareholders for safety issues, stabilization and capacity increase (KCl-benification, potash storage), improvement of energy efficiency (co-generation measures) with the goal to increase the production volume up to 120kt of wet potash |
| 2009 |
Inauguration of new mining areas, drilling of new wells, power plant merged to the company |
| 2012 |
Commissioning of a KCl drying station |
| 2017 |
Merger with NDH Entsorgungsbetreibergesellschaft mbH |
| 2020 |
Commissioning of a further potash drying facility, which, together with the existing facility, enables the company to dry the entire potash production |
