Reactor and method for making calcium hydroxide
AssigneePetroliam Nasional Berhad (Petronas)
InventorsMohammad Ghaddaffi b M Noh, M Syazwan B Onn, Ruzilah Binti Sanom
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Abstract
A method for making a calcium hydroxide solution includes adding water and calcium oxide into a slaking reactor equipped with a stirring means at an upper end and two or more outlets positioned at different heights. The materials are stirred so that a vertical concentration gradient of calcium ions develops within the reactor, producing a clear liquid layer at an upper region and a milk of lime suspension at a lower region. A desired calcium hydroxide solution is obtained by selecting an outlet corresponding to the required concentration of calcium ions.
Claims8
A method for making a calcium hydroxide solution comprising the steps of:
- adding water and calcium oxide to a slaking reactor comprising a stirring means at an upper end thereof, and two or more outlets provided at different vertical positions of the slaking reactor;
- stirring the water and the calcium oxide such that a concentration gradient of calcium ions is formed within the slaking reactor;
- and
- selecting an outlet from the two or more outlets to collect the calcium hydroxide solution depending on a concentration of calcium ions required.
Dependencies are inferred from the claim text.