TITANIUM PHOSPHATE-BASED SORBENT PREPARATION METHOD Russian patent published in 2005 - IPC

FIELD: sorbents.

SUBSTANCE: invention relates to preparation of compounds based on poorly soluble polyvalent metal salts of polybasic acids, in particular titanium phosphate, which can be used as sorbents for various cations from aqueous solutions. Synthesis of titanium phosphate-based sorbent is accomplished by interaction of phosphate solution with titanium-containing solution preheated to 70-100°C at P/Ti ratio (1.0-2.6):1. Resulting hydrogel is separated from mother liquor, washed with water, and subjected to heat treatment for 20-36 h at 35 to 100°C, after which dried at higher temperature (100-120°C). Titanium-containing solution may be 0.6-2.8 M solution of titanium in sulfuric or hydrochloric acid and phosphate solution may be 0.5-3.6 M orthophosphoric acid solution. According to invention, before heat treatment or after drying, hydrogel is, respectively, molded or ground to granule or particle size 0.6 to 10.0 mm.

EFFECT: enabled preparation of granulated amorphous sorbent resistant to spontaneous destruction in aqueous media, having improved sorption characteristics and low hydrodynamic resistance.

4 cl, 1 tbl, 10 ex