Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
A process of making a lime slurry
A process of making a lime slurry, which is suitable for adjusting the pH of water during water treatment, the process comprising the steps of: (a) contacting solid particulate calcium-rich material with water to form a calcium hydroxide slurry, wherein the solid particulate calcium-rich material comprises: (i) from 90wt% to 99.9997wt% calcium material selected from calcium hydroxide and/or calcium oxide; and (ii) from 0.0003wt% to 0.001wt% manganese cations; wherein greater than 95wt% of the solid particulate calcium-rich material has a particle size of less than 100µm, wherein the calcium hydroxide slurry has a solids content of from 1.0wt% to 25wt%, and wherein the calcium hydroxide slurry comprises from 0.90wt% to 25wt% calcium hydroxide; and (b) contacting the calcium hydroxide slurry with an oxidising material; (c) reacting the slurry obtained in step (b) so as to form water-soluble oxidised manganese cations and purified calcium hydroxide solid material; (d) separating the purified calcium hydroxide from the slurry to form purified calcium hydroxide wet cake and a liquid aqueous phase comprising the water-soluble oxidised manganese cations; and (e) contacting water to the purified calcium hydroxide wet cake to form a slurry, wherein the purified calcium hydroxide slurry comprises less than 0.0003wt% manganese cations.
A process of making a lime slurry
A process of making a lime slurry, which is suitable for adjusting the pH of water during water treatment, the process comprising the steps of: (a) contacting solid particulate calcium-rich material with water to form a calcium hydroxide slurry, wherein the solid particulate calcium-rich material comprises: (i) from 90wt% to 99.9997wt% calcium material selected from calcium hydroxide and/or calcium oxide; and (ii) from 0.0003wt% to 0.001wt% manganese cations; wherein greater than 95wt% of the solid particulate calcium-rich material has a particle size of less than 100µm, wherein the calcium hydroxide slurry has a solids content of from 1.0wt% to 25wt%, and wherein the calcium hydroxide slurry comprises from 0.90wt% to 25wt% calcium hydroxide; and (b) contacting the calcium hydroxide slurry with an oxidising material; (c) reacting the slurry obtained in step (b) so as to form water-soluble oxidised manganese cations and purified calcium hydroxide solid material; (d) separating the purified calcium hydroxide from the slurry to form purified calcium hydroxide wet cake and a liquid aqueous phase comprising the water-soluble oxidised manganese cations; and (e) contacting water to the purified calcium hydroxide wet cake to form a slurry, wherein the purified calcium hydroxide slurry comprises less than 0.0003wt% manganese cations.
A process of making a lime slurry
CHRISTOPHER RAYMOND MEYER (Autor:in) / JAY DEEP WADHAWAN (Autor:in) / DAVID KOCSIS (Autor:in)
15.03.2023
Patent
Elektronische Ressource
Englisch
IPC:
C02F
Behandlung von Wasser, Schmutzwasser, Abwasser oder von Abwasserschlamm
,
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
/
C01F
COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
,
Verbindungen der Metalle Beryllium, Magnesium, Aluminium, Calcium, Strontium, Barium, Radium, Thorium oder der Seltenen Erden
/
C04B
Kalk
,
LIME
Method and System for making Lime Slurry using Oyster Shell
| Europäisches Patentamt | 2020