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January 17, 2017 01:00 AM

Wacker to add fumed silica plant at Tennessee campus

Chris Sweeney
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    Wacker Chemie A.G.
    Wacker produces HDK pyrogenic silica at Burghausen and Nuenchritz in Germany and Zhangjiagang in China. The Munich-based chemical company is the world's third-largest manufacturer in this sector.

    CHARLESTON, Tenn.—Wacker Chemie A.G. intends to invest $150 million to establish a new pyrogenic silica facility on the same site as its existing plant in Charleston.

    Construction is projected to start in the second quarter of 2017 with completion targeted for the first half of 2019. Wacker said the new site will have an annual capacity of 13,000 metric tons for its HDK brand of pyrogenic silica and create 50 jobs.

    A company spokesman said in an email that local authorities—the Bradley County government offices, Bradley-Cleveland Chamber of Commerce, Industrial Board and the state of Tennessee—was outstanding in providing aid to the firm for infrastructure measures, road access and access to a reliable power supply.

    "Our HDK brand of fumed silica is in high demand," the spokesman said. "The additional capacities strengthen our market position as a leading global producer of fumed silica and help us to provide our customers with the volumes they need also in the future."

    Wacker's facility in Charleston produces hyperpure polysilicon for the solar and semiconductor sectors. It employs about 650 people with an annual capacity of 20,000 metric tons.

    The firm currently produces its HDK-branded pyrogenic silica at Burghausen and Nuenchritz, Germany, and Zhangjiagang, China. The Munich-based chemical company said it is the world's third largest manufacturer in this sector.

    Wacker A.G.
    Wacker produces hyperpure polysilicon for the solar sector at its Charleston, Tenn. plant. The company plans to build a pyrogenic silica plant on site.

    "The additional capacities strengthen our market position as a leading global producer of pyrogenic silica and help us to meet our customers' growing demand," Wacker CEO Rudolf Staudigl said in a statement. "The new plant is the next logical step toward expanding Charleston into a fully integrated silicon site in the world's second-largest chemical market."

    Wacker called the facility a key addition to the Charleston site's supply chain. The company said that by integrating the polysilicon and HDK production systems, as it does at its Burghausen and Nuenchritz sites in Germany, it can achieve maximum flexibility in the reprocessing of tetrachlorosilane, avoids the need to dispose of waste products, resulting in the enhanced efficiency of the integrated production system as a whole.

    Ultrapure amorphous silicon dioxide powder is used as a filler in silicone elastomers and as a rheology-control additive in paints, adhesives, unsaturated polyester resins and plastisols. It also serves as a flow aid in the cosmetics, pharmaceutical and food-processing industries.

    "A fumed silica facility in Charleston enhances our flexibility in processing byproducts from our polysilicon production," the spokesman said. "The main byproduct of polysilicon manufacturing is tetrachlorosilane, which either has to be converted and fed back into the production loop or can be used to create added value by being further processed into fumed silica."

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