公开(公告)号：US11472706B2

公开(公告)日：2022-10-18

申请号：US16763999

申请日：2018-11-30

Applicant: Solvay SA

Inventor： Thierry Delplanche ,  Aziz Mimouni ,  Thierry Le Mercier ,  Sarah Khirani ,  Lauriane D'Alencon ,  Yves Antoinette ,  Beatrice Ortego

IPC: B01D53/02 ,  B01J20/20 ,  B01J20/02 ,  B01J20/04 ,  B01J20/28 ,  C01B25/32 ,  C02F1/28

Abstract: A composite comprising a hydroxyapatite and at least one additive which is present during hydroxyapatite synthesis. The additive may be embedded or incorporated into or coated onto the hydroxyapatite. The additive preferably increases the hydroxyapatite porosity, e.g., providing a higher pore volume and/or BET surface area than a hydroxyapatite material without additive. The additive preferably comprises an activated carbon, chitosan, hopcalite, clays, zeolites, sulfur, and/or a metal such as Al, Sn, Ti, Fe, Cu, Zn, Ni, Cu, Zr, La, Ce, in the form of metal, salt, oxide, oxyhydroxide, and/or hydroxide. The hydroxyapatite may be calcium-deficient. The composite is in the form of particles having a D50 of at least 20 μm, a BET surface area of at least 120 m2/g; and/or a total pore volume of at least 0.3 cm3/g. An adsorbent material comprising a composite or a blend of composite with a hydroxyapatite without additive, and its use for removal of contaminants such as Hg, Se, As, and/or B from an effluent.