WACKER Begins Constructing Pyrogenic Silica Plant
June 5, 2017
Wacker Chemie AG officially started construction on the HDK® pyrogenic silica plant located adjacent to WACKER’s Charleston, Tenn. polysilicon plant. “The new plant will support growing global demand and is a strategic next step in expanding Charleston into a fully integrated silicon site,” said Auguste Willems, WACKER executive board member.
According to WACKER, the silica plant will enable the company to meet growing demand for the product. The plant will have an annual capacity of 13,000 metric tons and is scheduled to be completed in the first half of 2019.
The main byproduct of polysilicon manufacturing is tetrachlorosilane, which either must be converted and fed back into the production loop, or used to create added-value by being further processed into HDK. By integrating the polysilicon and HDK production systems, WACKER says it achieves optimum flexibility in reprocessing tetrachlorosilane into a marketable product, the company stated. WACKER produces HDK pyrogenic silica at Burghausen and Nunchritz in Germany and at Zhangjigang, China.