
Trading house for chemicals and fertilizers; historical namesake of the Cologne-Kalk chemical plant shut down in 1993

Chemische Fabrik GmbH
Cologne (Kalk) · GermanyNew on Amplifa
About Chemische Fabrik
Chemische Fabrik GmbH operates as a trading company for chemicals and fertilizers and continues the name of the historic Chemische Fabrik Kalk GmbH. The latter was founded in 1858 in Cologne by Julius Vorster and Hermann Julius Grüneberg as Chemische Fabrik Vorster & Grüneberg, Cöln and renamed Chemische Fabrik Kalk GmbH in 1892. The plant in Cologne-Kalk produced potassium nitrate, soda, potassium chloride, nitrogen and phosphate fertilizers, ammonium sulfate, sal ammoniac, magnesium sulfate as well as sulfuric acid and nitric acid. Grüneberg developed the world's first industrial process for processing raw potassium salts (carnallite). In 1960, Salzdetfurth AG (later Kali und Salz, today K+S) took over the company, which was at times the second-largest soda producer in Germany and employed up to around 2,400 people. BASF decided to close the plant as of December 31, 1993; afterwards the production facilities were demolished and the site remediated. Production no longer takes place today.
- Site
- Cologne
- Materials
- Potassium nitrate, Sodium carbonate, Potassium chloride, Nitrogen and phosphate fertilizers, Thomas phosphate, Ammonium sulfate, Sulfuric acid and nitric acid
- Founded
- 1858
- Industries
- Chemicals, Fertilizers, Agriculture
Products and Processes (historical)
Potassium nitrate
Historical main product, used as an oxidizing agent for food preservation and for the production of black powder.
Sodium carbonate
By-product of potassium nitrate production; CFK was at times the second-largest soda producer in Germany.
Potassium chloride
Produced from carnallite using a newly developed crystallization process; the world's first industrial processing of raw potassium salts.
Nitrogen and phosphate fertilizers
Added to the product range from 1864; first large-scale factory in Germany to chemically produce all three main nutrients.
Thomas phosphate
Cost-effective fertilizer based on Thomas slag, developed by Carl Johann Heinrich Scheibler.
Ammonium sulfate
Produced from ammonia from town gas gas liquor and sulfuric acid; production sites including Raderberg, Nippes and several German and foreign cities.
Sulfuric acid and nitric acid
Produced from 1881 in new production facilities at the Kalk parent plant.
Locations

Cologne-Kalk (historical parent plant)
DEHistorical main plant (production shut down in 1993, facilities demolished)
- Materials
- Potassium nitrate, soda, potassium chloride, fertilizers, sulfuric acid, nitric acid
Staßfurt / Leopoldshall (historical)
DESalines and potassium chloride works
- Materials
- Potassium chloride (carnallite)
Raderberg (historical)
DEBranch plant for ammonium sulfate
- Materials
- Ammonium sulfate
Inside the production

Industries
History
- 1858
Founded as Chemische Fabrik Vorster & Grüneberg, Cöln by Julius Vorster and Hermann Julius Grüneberg on November 1, 1858; production began with potassium nitrate, by-product soda; initially ten employees.
- 1859
Production start in Kalk (February 1859) on the site of the former Biber & Berger iron foundry; potassium nitrate from Russian potash and soda niter.
- 1860
Expansion; introduction of beet potash as a raw material; start of potassium chloride production; acquisition of a saline in Staßfurt; world's first industrial processing of raw potassium salts (carnallite).
- 1864
Product range expanded to include nitrogen and phosphate fertilizers; first large-scale factory in Germany to chemically produce all three main nutrients.
- 1865
Branch plant in Raderberg for ammonium sulfate; further ammonia plants including in Nippes, Düsseldorf, Essen, Dortmund, Hamburg, Leipzig, St. Petersburg; sal ammoniac factory in Moscow.
- 1867
Financial losses due to bad investments in England; Julius Vorster jr. joins the company management; magnesium sulfate added to the product range.
- 1870
Overcoming of the financial crisis.
- 1875
Fritz Vorster joins as technical director (October 1, 1875).
- 1876
Death of founder Julius Vorster (October 10, 1876); conversion into a limited partnership; gold medal at the Centennial Exposition in Philadelphia.
- 1878
Carl Johann Heinrich Scheibler becomes head of the fertilizer department; development of Thomas phosphate.
- 1881
New production facilities for sulfuric acid and nitric acid in Kalk.
- 1892
Renaming to Chemische Fabrik Kalk GmbH (May 24, 1892).
- 1960
Acquisition by Salzdetfurth AG (later Kali und Salz / K+S, a subsidiary of BASF).
- 1960s-1993
At times the second-largest soda producer in Germany; up to approx. 2,400 employees.
- 1993
BASF decides to close the plant as of December 31, 1993 due to unprofitability; afterwards demolition of the production facilities and remediation of the site.
- nach 1993
Exists only as the name of a trading house for chemicals and fertilizers of K+S AG; the Cologne Police Headquarters and the Köln Arcaden were built on the site.