US 2022/0081311 A1

Sustainable calcium hydroxide production for green cement

(22) 24.08.2021

(43) 17.03.2022

(57) A method of making a composition of matter comprising calcium hydroxide. The method includes the steps of contacting a calcium-containing molecule with an aqueous solution of a water-soluble salt having ammonium cation and a counter-anion, under conditions effective to yield a compound containing calcium and the counter-anion; and reacting the compound comprising calcium and the counter-anion with ammonia and water under conditions to yield calcium hydroxide.

(71) Wisconsin Alumni Research Foundation, Madison, WI (US)

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