Titanium stannate silicate, method of preparation and use thereof

Patent metadata

Field	Value
Publication number	US-10814310-B2
Application number	US-201414782665-A
Country	US
Kind code	B2
Filing date	Apr 10, 2014
Priority date	Apr 11, 2013
Publication date	Oct 27, 2020
Grant date	Oct 27, 2020

Abstract

The present invention relates to an amorphous titanium stannate silicate with the general formula: Mv+wTixSiySnzO2x+2y+2z+0.5vw, wherein M is proton, ammonium, a metal or a mixture of metals, wherein v is the valence of M being a positive integer, and wherein x, y, z and w are molar ratios: x is 1, y is from 0.01 to 99, z is from 0.01 to 99, and w is from 0.01 to 50. The described titanium stannate silicates are particularly useful in catalysis and adsorption.

First claim

The invention claimed is:

1. Amorphous titanium stannate silicate with the general formula:
M v+ w Ti x Si y Sn z O 2x+2y+2z+0.5vw ,
wherein M is at least one of a proton, ammonium, a metal or a mixture of metals, v is the valence of M being a positive integer and wherein x, y, z and w are molar ratios:
x is 1,
y is from 0.1 to 5,
z is from 0.03 to 1, and
w is from 0.01 to 10, and

wherein said titanium stannate silicate has an average pore diameter of at least 40 Å, determined by liquid nitrogen adsorption.

2. The titanium stannate silicate according to claim 1 , wherein M is at least one of proton, ammonium, Na, Li, K, Cs, Ca, Mg, Sr, Ba, Fe(II), Fe(III), Sn(II), Ce, La, Nb, Ni, V, W, Mo, Al, Zn, Cu, Mn.

3. The titanium stannate silicate according to claim 1 , wherein w is in the range 0.1-10.

4. The titanium stannate silicate according to claim 1 , wherein said titanium stannate silicate has a pore volume of at least 0.3 mL/g, determined by liquid nitrogen adsorption.

5. The titanium stannate silicate according to claim 1 having a form of powder, tablets, granules or extrudate.

6. A method for titanium stannate silicate preparation, the method comprising:
reacting a soluble silicate source, a soluble stannate source and a soluble titanium source in an aqueous medium to form titanium stannate silicate,
precipitating the titanium stannate silicate, and
isolating the titanium stannate silicate, the titanium stannate silicate having the general formula:
M v+ w Ti x Si y Sn z O 2x+2y+2z+0.5vw ,

wherein M is at least one of a proton, ammonium, a metal or a mixture of metals, v is the valence of M being a positive integer and wherein x, y, z and w are molar ratios:
x is 1,
y is from 0.1 to 5,
z is from 0.03 to 1, and
w is from 0.01 to 10, and

wherein said titanium stannate silicate has an average pore diameter of at least 40 Å, determined by liquid nitrogen adsorption.

7. The method according to claim 6 , further comprising ion exchanging with a cation selected from proton, ammonium, Na, Li, K, Cs, Ca, Mg, Sr, Ba, Fe(II), Fe(III), Sn(II), Ce, La, Nb, Ni, V, W, Mo, Al, Zn, Cu, Mn ions, and combinations thereof.

8. The method according to claim 6 , wherein the titanium stannate silicate is further calcined at a temperature of above 200° C.

9. A method comprising:
introducing into a chemical reaction an amorphous titania stannate silicate with the general formula:
M v+ w Ti x Si y Sn z O 2x+2y+2z+0.5vw ,

wherein M is at least one of a proton, ammonium, a metal or a mixture of metals, v is the valence of M being a positive integer and wherein x, y, z and w are molar ratios:
x is 1,
y is from 0.1 to 5,
z is from 0.03 to 1, and
w is from 0.01 to 10, and

wherein said titania stannate silicate has an average pore diameter of at least 40 Å, determined by liquid nitrogen adsorption.

10. The method according to claim 9 , wherein the chemical reaction is a reaction of esterification, Michael addition, transesterification, oxidation, epoxidation, or hydroxylation.

11. A method for adsorption and desorption of metals from a metal-contaminated waste stream and ground water, the method comprising:
introducing an amorphous titania stannate silicate having the general formula:
M v+ w Ti x Si y Sn z O 2x+2y+2z+0.5vw ,

wherein M is at least one of a proton, ammonium, a metal or a mixture of metals, v is the valence of M being a positive integer and wherein x, y, z and w are molar ratios:
x is 1,
y is from 0.1 to 5,
z is from 0.03 to 1, and
w is from 0.01 to 10; and

contacting the amorphous titania stannate silicate with a metal contaminated stream, wherein said titania stannate silicate has an average pore diameter of at least 40 Å, determined by liquid nitrogen adsorption.

12. The method of claim 11 further comprising selectively adsorbing and desorbing metals in the metal contaminated stream.

13. The method according to claim 12 , wherein the metals comprise Pt (II), Pt(IV), Pd, Gd, Hg, Cd, Au or Ho.

14. The method according to claim 11 , wherein y is in the range of 0.2-5.

15. The method according to claim 11 , wherein z is in the range of 0.05-1.

16. The method according to claim 11 , further comprising adsorbing and removing radionuclides.

17. The method of claim 16 , wherein the radionuclides comprise 90 Sr or actinides.

Assignees

• Basf Corp

Inventors

• Brandts Jim Aloysius Maria

Classifications

• B01J2235/15

  X-ray diffraction · CPC title

• C02F2101/327

  Polyaromatic Hydrocarbons [PAH's] · CPC title

• B01J39/14

  Base exchange silicates, e.g. zeolites · CPC title

• C02F1/281

  using inorganic sorbents · CPC title

• G21F9/12

  by absorption; by adsorption; by ion-exchange · CPC title