Solution Crystallization Expertise for Inorganic Chemicals

GEA's evaporators and crystallizers form an integral part of numerous production processes for inorganic products.

Crystallization of inorganic chemicals

Installation DU SQM KNO3 2

Our wide range of proprietary equipment includes large capacity pre-evaporator systems, as well as fine chemicals crystallization units. We have installed large-scale solution crystallization plants for sodium and potassium chloride, sodium and ammonium sulfate, potassium nitrate, and potassium and sodium carbonate. We also have significant expertise in crystallization processes for the production of chemicals and compounds including caffeine, vitamin C, citric acid, pentaerythritol, bisphenol A, nickel sulfate, sodium dimolybdate, and sodium thiosulfate. 

Recovery of salts from waste streams

Installing plants for the recovery (evaporation/concentration) of calcium chloride (CaCl2) from various resources has been part of our core business since 1980. The product is typically available in the form of flakes and granules, from 76% CaCl2 to 96% CaCl2, dependent upon the application (pharmaceutical, chemical, food). In the 1980s GEA developed the process of evaporation crystallization for the preparation of pharmaceutical-grade calcium chloride from calcium chloride solution prepared by the reaction of limestone with hydrochloric acid.

The crystallization of sodium sulfate is another key business for GEA, and we have already supplied over 70 installations, which have anhydrous sodium sulfate production capacities ranging from 200 kg/hour to 40 tons/hour.

The compound is produced from natural minerals or from natural salt lakes, and is also obtained as a byproduct of chemical neutralization processes that generate sodium sulfate solution. Examples include the regeneration of spin bath liquors, the chromium industry and the production of vitamin C. GEA is active in all these industries, to which it supplies technologies for mineral dissolution, brine purification, Glauber’s salt crystallization, and calcination of the Glauber’s salt by crystallization of anhydrous sodium sulfate, including separation and drying.

GEA operates a state-of-the-art research center, in which new process concepts can be evaluated, and detailed modeling carried out to optimize design and operation of a plant or process.