EP3371100 (A1)

Method for reducing elemental sulfur in gypsum products

(22) 03.11.2016

(43) 12.09.2018

(57) 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.

(71) CertainTeed Gypsum, Inc (US)

x

Related articles:

Issue 7-8/2017 WO 2017/079410 A1

Method for reducing elemental sulfur in gypsum products

(22) 03.11.2016 (43) 11.05.2017 (57) Disclosed are various methods for reducing levels of elemental sulfur within gypsum products such as wall board. Gypsum sometimes includes increased levels of...

more
Issue 5/2023 WO 2023/068587 A1

Method for preparing gypsum by using bio-sulfur, and use thereof

(22) 28.09.2022 (43) 27.04.2023 (57) Disclosed are: a method for preparing gypsum, which contains a large amount of anhydrite, by using bio-sulfur; and a use of gypsum prepared thereby. The...

more
Issue 1-2/2019 WO 2018/166220 A1

Method for co-producing sulphoaluminate cement and sulfur by using desulfurized gypsum and aluminum ash

(22) 07.11.2017 (43) 20.09.2018 (57) A method for co-producing sulphoaluminate cement and sulfur by using desulfurized gypsum and aluminum ash, comprising: (1) drying aluminum ash, and heating...

more
Issue 7/2023 EP 4 190 758 A1

Method for regulating alite crystal structure in cement clinker

(22) 11.08.2021 (43) 07.06.2023 (57) Disclosed is a method for regulating an alite crystal structure in a cement clinker. In a preparation process of a Portland cement raw meal, a magnesium element...

more
Issue 5-6/2020 US 2020/0078980 A1

Gypsum panels, systems, and methods

(22) 25.10.2017 (43) 12.03.2020 (57) Gypsum panels and methods of making the same are provided. A method of making a gypsum panel includes forming a first gypsum slurry by combining stucco, water, a...

more