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Swenson Technology, Inc. is an American industrial equipment manufacturer specializing in chemical process equipment, including crystallizers, evaporation, and drying systems.^[1] The company is a subsidiary of Whiting Corporation and is headquartered in Crete, Illinois.^[2]

Swenson designs chemical process equipment used to convert liquid solutions into dry solid. It serves industries such as chemicals, fertilizers, mining, and other specialty materials. The company has expanded its work in lithium refining in recent years, supplying crystallization systems used in battery raw material production.

Swenson Technology was founded in 1889 by Magnus Swenson. ^[3] Whiting Corporation acquired the company in 1923. ^[4] The company was formerly known as the Swenson Evaporator Company, under which name it held early crystallizer patents; a 1932 U.S. patent for a continuous vacuum crystallization process was assigned to the Swenson Evaporator Company.^[5]

Swenson-designed evaporators, crystallizers, and dryers have been installed in over 65 countries.^[6] In December 2013, the company completed a multi-million-dollar expansion of its Test Center research facility in Harvey, Illinois, adding laboratory and pilot-scale equipment to support process development across industries including mining, fertilizer production, inorganic chemicals, and industrial biotechnology.^[7]

Swenson manufactures three main categories of process equipment:

• Crystallizers, including the draft tube baffle (DTB), forced-circulation, surface-cooled, vacuum, and Swenson-Walker designs.^[8]
• Evaporators, including forced-circulation, falling-film, rising-film, and mechanical vapor recompression (MVR).^[9]
• Dryers, including fluid bed and rotary dryer systems.^[10]

The company's draft tube baffle (DTB) crystallizer is designed to produce large, uniform crystals used in fertilizer manufacturing and similar applications requiring specific filtration, washing, and drying characteristics.^[11]

Two Swenson crystallizer designs have become reference points in chemical engineering literature independent of the company's own marketing. The Swenson-Walker Crystallizer, a continuous, cooling-type trough crystallizer, is widely used as a teaching example in chemical and pharmaceutical engineering coursework, and was the subject of an independent operating-characteristics study by researcher Sherman Irving Ginsberg.^[12] The DTB crystallizer, along with the Swenson-Walker and Swenson evaporative designs, was used as one of eleven benchmark industrial crystallizer configurations in a 2014 peer-reviewed computational fluid dynamics study published in the Canadian Journal of Chemical Engineering, which compared crystal size distribution outcomes across designs from multiple manufacturers.^[13]