Patent · US Active

Classifying polysilicon

US10589318B2 · kind B2 · utility

0Cited by

9References

16Claims

0Family size

Assignee

Wacker Chemie AG · DE

Inventors

Andreas Schneider · Leonberg, DE
Peter Gruebl · Triftern, DE
Rainer Hauswirth · Haag in Oberbayern, DE
Reiner Pech · Vilshofen an der Donau, DE

Key dates

Filing date	Aug 7, 2014
Grant date	Mar 17, 2020
Priority date	—
Expiry date	Jul 20, 2035

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB07B2201/04
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A method for mechanically classifying polycrystalline silicon chunks or granules with a vibratory screening machine, involves setting silicon chunks or granules present on one or more screens each comprising a screen lining in vibration such that the silicon chunks or silicon granules perform a movement which causes the silicon chunks or silicon granules to be separated into various size classes, wherein a screening index is greater than or equal to 0.6 and less than or equal to 9.0.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.