公开(公告)号：US10512887B2

公开(公告)日：2019-12-24

申请号：US16087416

申请日：2017-03-01

申请人： Wacker Chemie AG

发明人： Gerhard Forstpointner ,  Bernhard Baumann

IPC分类号： B01J8/00 ,  B01J8/18 ,  C01B33/027 ,  F16K7/04 ,  B01J19/02

摘要： Control of the flow of granular polysilicon granules is effected by employing an elastomeric pinch sleeve valve. The flow control by this method is especially useful for controlling the flow of silicon seed particles and granular polysilicon product in the fluidized bed method for producing polysilicon. The flow may be stopped without gas leakage, and is suitable for use over long operating campaigns.

公开(公告)号：US10899626B2

公开(公告)日：2021-01-26

申请号：US14889347

申请日：2014-04-28

申请人： WACKER CHEMIE AG

发明人： Simon Pedron ,  Gerhard Forstpointner

IPC分类号： B01J4/00 ,  B01J8/18 ,  C01B33/03 ,  C01B33/027 ,  B01J8/00 ,  B01J8/24 ,  C23C16/24 ,  C23C16/442

摘要： The fluidized bed process for preparing polysilicon by chemical vapor deposition is improved by positioning at least one Laval nozzle upstream from a gas inlet into the reactor.

公开(公告)号：US10537899B2

公开(公告)日：2020-01-21

申请号：US15316931

申请日：2015-06-02

申请人： Wacker Chemie AG

发明人： Gerhard Forstpointner ,  Rainer Hauswirth

IPC分类号： B02C19/06 ,  C01B33/021 ,  C04B35/56

摘要： Silicon seed particles which can be used for producing polycrystalline silicon granules in a fluidized-bed reactor are prepared by a process wherein a milling gas stream is introduced into a chamber containing polycrystalline silicon granules, as a result of which individual particles of the polycrystalline silicon granules are accelerated in such a manner that they collide with other particles of the polycrystalline silicon granules, and in this manner the polycrystalline silicon granules are comminuted, wherein the milling gas stream is introduced into the chamber by at least one jet nozzle made of hard metal.

公开(公告)号：US10974218B2

公开(公告)日：2021-04-13

申请号：US16641375

申请日：2017-08-23

申请人： WACKER CHEMIE AG

发明人： Simon Pedron ,  Bernhard Baumann ,  Gerhard Forstpointner

IPC分类号： B01J8/18 ,  B01J8/44 ,  C01B33/027

摘要： A subject of the invention is a fluidized-bed reactor for producing granular polycrystalline silicon. The fluidized-bed reactor comprises a segmented reactor tube, which is disposed between a reactor top and a reactor bottom, a heating facility, at least one nozzle for supplying fluidizing gas, at least one nozzle for supplying reaction gas, a facility for supplying silicon seed particles, a product removal line, and an offgas removal line. The segmented reactor tube comprises a base segment and at least one spacer segment, there being disposed, between base segment and spacer segment, a flat seal made from a carbon-containing material, the spacer segment consisting of a material which, within a temperature range from 100 to 950° C., has a thermal conductivity of

公开(公告)号：US10526711B2

公开(公告)日：2020-01-07

申请号：US15326522

申请日：2015-08-26

申请人： Wacker Chemie AG

发明人： Gerhard Forstpointner ,  Bernhard Baumann ,  Michael Fricke

IPC分类号： C23C24/04

摘要： Plastic material-comprising surfaces of a substrate are coated with elemental silicon by cold gas spraying by injecting a powder containing silicon into a gas and powder with a high velocity onto the substrate surface, such that the silicon forms a firmly adherent coat on the substrate surface comprising the plastics material. Apparatuses having such silicon-coated surfaces are useful in minimizing contamination of polycrystalline silicon production, processing, packaging, and transport.

公开(公告)号：US10363534B2

公开(公告)日：2019-07-30

申请号：US15525631

申请日：2015-11-03

申请人： Wacker Chemie AG

发明人： Dirk Weckesser ,  Gerhard Forstpointner ,  Harald Hertlein

IPC分类号： B01J8/18 ,  C01B33/027 ,  C01B33/029 ,  C23C16/24

摘要： Assembly of a fluidized bed reactor for the preparation of polycrystalline silicon granules by chemical vapor deposition of silicon onto seed particles and removal of polycrystalline silicon granules is facilitated without breakage and with gas tightness by a specific assembly sequence.