Technologies

Distillation and Purification:

The final purification of solar and electronics grade Trichlorosilanes (TCS) requires removal of impurities below the parts per billion level. DEI utilizes multiple distillation columns in the separation of Chlorosilanes from Impurities to cut down energy consumption and ensure ultra-high product purity by minimizing cross pollution of impurities. DEI’s process to prepare the final stage purification equipment and adsorbent materials assures rapid start-up. Our specifications provide for construction, handling and cleaning techniques for the equipment to assure that it is free from contamination.

TCS Fluidized Bed Reactor Design:

DEI’s unique design calls for a reliable and useable construction of the Fluidized Bed Reactor (FBR). The FBR performs in a pressurized, high wear environment requiring both heat addition to initialize the reactions and cooling to keep the reactors performing at peak efficiency. A uniform temperature distribution maximizes the yields of TCS. DEI’s design optimizes the robustness of the equipment to minimize risk of hazards and maintenance down time while achieving peak reactor performance.

By Product Catalysts:

DEI utilizes a redistribution catalyst to minimize the production of DCS and STC and maximize the yield of TCS.

Silane Option:

By specifying different operating conditions and reactor design for the redistribution catalyst, DEI can provide a unit operation for the production of silane. Electronics grade silane can be produced for approximately $25/kg.

Polysilicon Plant Integration:

DEI provides the integration of different units from all process providers.

• Metallurgical Grade silicon grinding
• HCl preparation
• CVD Reaction
• STC Converters and Gas recovery
• Utilities
• Overall control