A platform for research: civil engineering, architecture and urbanism
METHODS FOR REACTIVATING PASSIVATED MINERAL RESIDUES
The instant disclosure sets forth a process for re-activating a mineral residue. The process includes providing a mineral residue, which includes a core and a shell around the core. In certain examples, the core comprises calcium (Ca), magnesium (Mg), or a combination thereof. The Ca and Mg is not present as elemental Ca or Mg but rather as a compound of Ca or of Mg, such as but not limited to Ca(OH)2 or Mg(OH)2. In certain examples, the shell comprises an oxide, a hydroxide, a carbonate, a silicate, a sulfite, a sulfate, a chloride, a nitrate, or nitrite, of calcium (Ca) or of magnesium (Mg), or a combination thereof. The process includes (a) fractionating the mineral residue; (b) contacting the mineral residue with an acid and fractionating the mineral residue; or (c) contacting the mineral residue with a base and fractionating the mineral residue. As a result, the mineral residue's core is exposed. In some examples, the shell is passivating and inhibits the Ca or Mg, or both, in the core from reacting with carbon dioxide (CO2). By exposing the core as described herein, a mineral residue's reactivity with carbon dioxide is increased.
METHODS FOR REACTIVATING PASSIVATED MINERAL RESIDUES
The instant disclosure sets forth a process for re-activating a mineral residue. The process includes providing a mineral residue, which includes a core and a shell around the core. In certain examples, the core comprises calcium (Ca), magnesium (Mg), or a combination thereof. The Ca and Mg is not present as elemental Ca or Mg but rather as a compound of Ca or of Mg, such as but not limited to Ca(OH)2 or Mg(OH)2. In certain examples, the shell comprises an oxide, a hydroxide, a carbonate, a silicate, a sulfite, a sulfate, a chloride, a nitrate, or nitrite, of calcium (Ca) or of magnesium (Mg), or a combination thereof. The process includes (a) fractionating the mineral residue; (b) contacting the mineral residue with an acid and fractionating the mineral residue; or (c) contacting the mineral residue with a base and fractionating the mineral residue. As a result, the mineral residue's core is exposed. In some examples, the shell is passivating and inhibits the Ca or Mg, or both, in the core from reacting with carbon dioxide (CO2). By exposing the core as described herein, a mineral residue's reactivity with carbon dioxide is increased.
METHODS FOR REACTIVATING PASSIVATED MINERAL RESIDUES
MEHDIPOUR IMAN (author) / SANT GAURAV (author)
2024-03-21
Patent
Electronic Resource
English
British Library Online Contents | 2001
|Rooting empowering reactivating. Rehabilitation of traditional heritage and local development
BASE | 2024
|Planning and Design for Reactivating Groundwater Systems in Urban Areas
British Library Conference Proceedings | 2011
|Reactivating the Hong Kong Botanical Garden and Government House : government hill
BASE | 2015
|