公开(公告)号：EP3371100A1

公开(公告)日：2018-09-12

申请号：EP16862948.3

申请日：2016-11-03

申请人： CertainTeed Gypsum, Inc.

发明人： COLLEGE, John W. ,  LEE, Sang-Ho ,  HILTON, Chris ,  KIANG, Yu-Zhi ,  LAI, Choung-Houng ,  GLAVIN, George ,  ILYASHENKO, Helen

IPC分类号： C01B17/02 ,  C01B17/50 ,  C01B17/04

CPC分类号： C01F11/468 ,  C01F11/466 ,  C01G1/12 ,  C01G3/12 ,  C01P2006/80 ,  C04B11/007 ,  C04B28/145 ,  C04B2111/0062 ,  C04B2111/10 ,  C04B14/42 ,  C04B22/14 ,  C04B24/08 ,  C04B24/10 ,  C04B24/383 ,  C04B38/10 ,  C04B2103/0016 ,  C04B2103/20

摘要： Disclosed are various methods for reducing levels of elemental sulfur within gypsum products such as wall board. Gypsum sometimes includes increased levels of elemental sulfur. Such sulfur can be corrosive and otherwise harmful at elevated levels. The disclosure contemplates reacting the elemental sulfur with copper to copper sulfide. This reaction has the benefit of reducing the levels of elemental sulfur present within the final gypsum product. The copper can be added at any of a variety of locations in the manufacturing process. This is a very efficient method for reducing elemental sulfur in the production of gypsum products.