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History of EDI and Electropure

History of EDI Electrodeionization

In 2017, SnowPure celebrated the 40th anniversary of Electropure EDI!

It started with a prototype

In 1977, Harry O’Hare began experimenting with electrodeionization (filled-cell ED) and created the first working EDI prototype. Prototype testing was done at Southern Research Institute (SRI). This ground-breaking work led to the founding of HOH Water Technology, Inc. in 1979. HOH applied for the first electrodeionization patents in 1981, which were issued in 1984, preceding the Millipore/Ionpure patents by two years. During the product development years of 1981-1989 a wide variety of EDI prototypes were designed and tested, including cylindrical EDI in a pressure vessel. With its new technology launched, the company went public in 1987.

Electropure was born

In 1996, HOH changed its name to Electropure and began aggressively marketed the EPM product line which became popular with a number of the “early adopters” in the pure water industry. Electropure licensed its electrodeionization technology to Glegg Water in 1994, enabling Robert Glegg to develop E-Cell®, now Suez Water’s EDI technology.

Continued innovation

In 1998 Electropure finished development and patented its Excellion ion exchange membranes and process, which enabled the XL product line to be developed in 1999.

The next step

2004 marked the introduction of the Electropure XL-HTS (High Temperature Stable) electrodeionization product line. SnowPure’s product line expanded again in 2005 with the introduction of Zapwater EDI for laboratories. SnowPure, a private corporation, was formed in 2005 and via a management buyout acquired Electropure’s EDI division. In 2006, SnowPure embarked on an aggressive expansion in China, opening up its sales office in Shanghai.

Celebrating our past, building our future

In 2007, SnowPure launched the XL-R industrial EDI product line. SnowPure International was formed in Hong Kong in 2008. The next year was highlighted by the addition of a revolutionary low-energy, compact UV product to the SnowPure line. In 2011, SnowPure launched the EXL EDI series worldwide and opened a global production and logistics facility in China.

We are actively working to add technologies that make electrodeionization work better, for example for hemodialysis water, and reducing silica further for semiconductor and power generation. An example is the new ExcellPure RO, the highest silica rejection membrane available.

SnowPure continues to create new innovations while expanding its world market presence in the pure water industry.

*Note: in 2005 Electropure Inc (public, ELTP) was renamed to Micro Imaging Technology Inc (now traded under MMTC). Shareholders of ELTP are now shareholders of MMTC. SnowPure is a privately held corporation.