公开(公告)号：US20170320035A1

公开(公告)日：2017-11-09

申请号：US15525631

申请日：2015-11-03

Applicant: Wacker Chemie AG

Inventor： Dirk WECKESSER ,  Gerhard FORSTPOINTNER ,  Harald HERTLEIN

IPC: B01J8/18 ,  C23C16/24 ,  C01B33/029

CPC classification number: B01J8/1818 ,  B01J8/1827 ,  B01J8/1836 ,  B01J8/1872 ,  B01J2208/00407 ,  B01J2208/00902 ,  B01J2219/00018 ,  C01B33/027 ,  C01B33/029 ,  C23C16/24

Abstract: 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.

公开(公告)号：US20170312724A1

公开(公告)日：2017-11-02

申请号：US15522444

申请日：2015-10-21

Applicant: Wacker Chemie AG

Inventor： Gerhard FORSTPOINTNER ,  Dirk WECKESSER

IPC: B01J8/24 ,  C01B33/03 ,  B01J8/18

CPC classification number: B01J8/24 ,  B01J8/1827 ,  B01J8/1836 ,  B01J2208/00752 ,  B01J2208/00902 ,  C01B33/03 ,  C01B33/033 ,  F23C10/20

Abstract: Contamination of fluidized bed-produced polycrystalline granules by phosphorus is reduced by employing as seals and/or packings, graphite containing

公开(公告)号：US20170158516A1

公开(公告)日：2017-06-08

申请号：US15320971

申请日：2015-06-19

Applicant: Wacker Chemie AG

Inventor： Simon PEDRON ,  Bernhard BAUMANN ,  Gerhard FORSTPOINTNER

IPC: C01B33/03 ,  C01B33/029 ,  B01J8/18

CPC classification number: C01B33/03 ,  B01J8/1827 ,  B01J8/1836 ,  B01J8/1872 ,  B01J2208/00761 ,  B01J2208/00902 ,  C01B33/027 ,  C01B33/029

Abstract: A fluidized-bed reactor for preparing granular polycrystalline silicon has a reactor vessel, a reactor tube and a reactor bottom within the reactor vessel, and an intermediate jacket located between the reactor tube and the reactor vessel, a heating device, at least one bottom gas nozzle for introducing of fluidizing gas and at least one secondary gas nozzle for introducing reaction gas, a silicon seed particle feed, an offtake line for granular polycrystalline silicon and reactor offgas discharge, wherein a main element of the reactor tube comprises at least 60% by weight of silicon carbide with a CVD coating having a layer thickness of at least 5 μm and is at least 99.995% by weight of SiC, or a main element of the reactor tube is a sapphire glass comprising at least 99.99% by weight of α-Al2O3.

公开(公告)号：US20190099730A1

公开(公告)日：2019-04-04

申请号：US16087416

申请日：2017-03-01

Applicant: Wacker Chemie AG

Inventor： Gerhard FORSTPOINTNER ,  Bernhard BAUMANN

IPC: B01J8/00 ,  B01J8/18 ,  C01B33/027 ,  F16K7/04

Abstract: 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：US20160101982A1

公开(公告)日：2016-04-14

申请号：US14889347

申请日：2014-04-28

Applicant: WACKER CHEMIE AG

Inventor： Simon PEDRON ,  Gerhard FORSTPOINTNER

IPC: C01B33/03 ,  C23C16/442 ,  C23C16/24 ,  B01J8/24 ,  B01J8/00

CPC classification number: C01B33/03 ,  B01J8/0015 ,  B01J8/1827 ,  B01J8/1836 ,  B01J8/1872 ,  B01J8/24 ,  B01J2208/00752 ,  B01J2208/00761 ,  B01J2208/00902 ,  B01J2208/065 ,  C01B33/027 ,  C23C16/24 ,  C23C16/442

Abstract: 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.

Abstract translation: 通过化学气相沉积制备多晶硅的流化床方法通过将至少一个拉瓦尔喷嘴从气体入口上游定位到反应器中得到改善。

公开(公告)号：US20170204520A1

公开(公告)日：2017-07-20

申请号：US15326522

申请日：2015-08-26

Applicant: Wacker Chemie AG

Inventor： Gerhard FORSTPOINTNER ,  Bernhard BAUMANN ,  Michael FRICKE

IPC: C23C24/04

Abstract: 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：US20170113228A1

公开(公告)日：2017-04-27

申请号：US15316931

申请日：2015-06-02

Applicant: Wacker Chemie AG

Inventor： Gerhard FORSTPOINTNER ,  Rainer HAUSWIRTH

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

Abstract: 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.