TÜV confirms 24.3% conversion rate for Schmid Silicon Technology’s hydrochlorination process

  • Schmid Silicon Technology's hydrochlorination process for the synthesis of trichlorosilane tested by TÜV.
    Schmid Silicon Technology's hydrochlorination process for the synthesis of trichlorosilane tested by TÜV.
  •   SST's certificate from TÜV.
    SST's certificate from TÜV.

TÜV Sued Industries Service recently released conversion results on Schmid Silicon Technology’s (SST) hydrochlorination process for the synthesis of trichlorosilane at its Saxony, Dresden plant. The study, conducted in December 2011, saw that the operating parameters were lowered to the minimum setting in order to see what was the absolute minimum conversion rate for SST’s hydrochlorination system under “worst” operating conditions.

The plant was run at 50% of its nominal output with the reaction time of the fluidized bed reactor dropped to 60% and the reaction temperature set to a minimum. Under these conditions the conversion rate for the hydrochlorination process was 24.3%. Jochem Hahn, COO of SST, stated, “We are very proud to prove to the polysilicon world the effectiveness of our low pressure hydrochlorination system. Our state of the art low pressure hydrochlorination serves a lot of advantages to our customers in respect to operation, safety and cost compared to conventional high pressure systems.”

TÜV additionally confirmed in its certificate of operation that the hydrochlorination plant, at full capacity with normal temperature and conditions, would see an enhanced conversion rate and output of TCS. Hahn, noted, “We are able to confirm a 26.8 % conversion rate in production with an even further upside potential.”

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