Hemlock Semiconductor Operations LLC

Dow Silicones Corporation

Hemlock Semiconductor Corporation

Patrick J Harder

Michael John Molnar

John Victor Bucci

Ted M Knowlton

S B Reddy Karri

Max E Dehtiar

Raymond Anthony Cocco

Tyler Swenson

David Williams

Sb Reddy Karri

A fluidized bed reactor includes a gas distributor, a tapered section above the gas distributor, and an expanded head above the tapered section. The gas distributor defines a plurality of inlets surrounding a product withdrawal tube, which extends away from the fluidized bed reactor. The fluidized bed reactor is useful in a process for fluidizing relatively large particles, such as Geldart Group B particles and/or Geldart Group D particles, where said particles are in a bubbling fluidized bed residing, in whole or in part, in the tapered section. The fluidized bed reactor and process may be used for manufacturing polycrystalline silicon.

Tapered fluidized bed reactor and process for its use

A process for preparing a product including a monohydrogentrihalosilane is disclosed. The process includes the steps of: 1) initially charging a reactor with a contact mass including both fresh silicon and recycled contact mass, where the recycled contact mass is obtained from during or after a production phase of an inorganic Direct Process reaction for production of a monohydrogentrihalosilane; and thereafter 2) feeding to the reactor a hydrogen halide and additional fresh silicon, thereby forming the product.

Process for preparing monohydrogentrihalosilanes

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Saginaw, MI, United States of America

Patrick J Harder