Preparing pure silicon, useful as raw material in e.g. solar industry, comprises introducing silicon containing gas, as input gas, into a upstream reactor and depositing hot separated bodies, which are silicons, on reactor surfaces

摘要

Preparing pure silicon comprises introducing silicon containing gas or gaseous mixture, as input gas, into a upstream reactor (2) and depositing hot separated bodies, which are silicons, on reactor surfaces, where: the upstream reactor forms an output gas; a portion of the input gas, as first output gas, comprises a gas component and at least one second further output gas component; the output gas is introduced into a downstream reactor (7); and at least one portion of the second output gas component is removed from the output gas of the upstream reactor. Preparing pure silicon comprises introducing silicon containing gas or gaseous mixture, as input gas, into a upstream reactor (2) and depositing hot separated bodies, which are silicons, on the reactor surfaces, where: the upstream reactor forms an output gas; a portion of the input gas, as first output gas, comprises a gas component and at least one second further output gas component; the output gas is introduced into a downstream reactor (7); and at least one portion of the second output gas component is removed from the output gas of the upstream reactor, before it is conducted into the downstream reactor. An independent claim is included for a device for preparing pure silicon comprises the upstream reactor and the second downstream reactor, where between the upstream and downstream reactors, a separation device for separating at least one gas component of the output gas of the first upstream gas reactor.