WO 2022/006230 A1

Methods and systems for forming vaterite from calcined limestone using electric kiln

(22) 30.06.2021

(43) 06.01.2022

(57) Provided herein are zero carbon dioxide (CO2) emission processes and systems to carry out the processes, comprising a) calcining limestone in a cement plant in an electric kiln to form a mixture comprising calcium oxide and a first gaseous stream comprising clean carbon dioxide, wherein the clean carbon dioxide comprises no gaseous or non-gaseous components from combustion of fuel; b) treating the mixture comprising calcium oxide with a N-containing salt solution under one or more dissolution conditions to produce a first aqueous solution comprising calcium salt; and c) contacting the first aqueous solution with the first gaseous stream comprising clean carbon dioxide under one or more precipitation conditions to produce a precipitation material comprising vaterite, aragonite, calcite, or combinations thereof.

(71) Arelac, Inc., 251 E. Hacienda Avenue, Suite B, Campbell, California 95008 (US)


Related articles:

Issue 2017-4 AU 2017200405 A1

Exhaust gas processing system and processing method

(22) 20.01.2017 (43) 09.02.2017 (57) There is disclosed an exhaust gas processing system, comprising: a desulfurization unit (2) that removes a sulfur oxide from an exhaust gas by a limestone/gypsum...

Issue 2022-2 US 2022/0002197 A1

Additive for blended cement compositions, cement produced therefrom and methods related thereto

(22) 14.11.2019 (43) 06.01.2022 (57) The present invention relates to a cement additive for use in a blended cement composition, the additive comprising a precipitated calcium carbonate formed from...

Issue 2022-1 WO 2021/225567 A1

Improved catalysts and processes for the direct production of liquid fuels from carbon bon dioxide and hydrogen

(22) 25.07.2020 (43) 11.11.2021 (57) Embodiments of the present invention relates to two improved catalysts and associated processes that directly converts carbon dioxide and hydrogen to liquid fuels....

Issue 2022-2 WO2022020780 (A1)

Systems, methods and devices for cement manufacture

(22) 23.07.2021 (43) 27.01.2022 (57) High temperature furnaces, calcining, pyrolysis and other high temperature manufacturing processes, composition rearrangements, and equipment. Systems, equipment...

Issue 2020-10 WO 2020/149744 A1

Carbon capture and storage

(22) 14.01.2019 (43) 23.07.2020 (57) It is disclosed a process and a plant or assembly of stages for producing soda lime (NaOH) and carbon dioxide, said plant comprising optionally an initial section...