Method for preparation of a group 4 metal silicate and use thereof

Patent metadata

Field	Value
Publication number	US-10286390-B2
Application number	US-201715674795-A
Country	US
Kind code	B2
Filing date	Aug 11, 2017
Priority date	Apr 17, 2013
Publication date	May 14, 2019
Grant date	May 14, 2019

Abstract

The invention provides a method for the preparation of an amorphous silicate of at least one metal from the Group 4 of the Periodic Table of Elements with a total pore volume of at least 0.3 mL/g. The method of preparation involves the use of pore shaping conditions, which can be the use of a pore shaper and optionally an increased precipitation temperature, e.g. at least 60° C. The silicate of the invention is especially suitable in catalytic reactions such as esterifications, Michael additions, transesterifications, (ep)oxidations, hydroxylations, or in absorbance of small inorganic and organic molecules e.g. CO 2 or aromatic compounds.

First claim

The invention claimed is:

1. A catalyst or adsorbent composition comprising a mesoporous and/or macroporous amorphous Group 4 metal silicate of formula
M v+ w T x Si y O 2x+2y+0.5vw
wherein
M is selected from the group consisting of a proton, an ammonium, a Na, Li, K, Cs, Ca, Mg, Sr, Ba, Fe, Sn, Ce, La, Nb, Ni, V, W, Mo, Al, Ag, Zn, Cu or Mn cation and combinations thereof,
v is the valence of M being a positive integer,
T is at least one of the Group 4 metals, and
x, y and w are molar ratios, wherein
x is 1;
y is from 0.01 to 99; and
w is from 0.01 to 50; and

wherein said silicate has a total pore volume of at least 0.3 mL/g as measured by liquid nitrogen adsorption and wherein the composition is in the form of a powder, tablet, granule or extrudate.

2. The composition according to claim 1 , wherein M is selected from the group consisting of Na, Li and K cations, and combinations thereof.

3. The composition according to claim 1 , wherein T is selected from the group consisting of Ti, Zr and Hf, and mixtures thereof.

4. The composition according to claim 1 in the form of a tablet or extrudate.

5. A method of performing a chemical reaction under catalytic conditions, the method comprising employing the composition according to claim 1 as a catalyst.

6. The method according to claim 5 wherein the chemical reaction is an esterification, Michael addition, transesterification, oxidation, epoxidation or an hydroxylation.

7. The method according to claim 5 wherein the chemical reaction is a transesterification.

8. A method for adsorption and/or removal of radionuclides from a contaminated aqueous stream, the method comprising contacting the stream with the composition of claim 1 .

9. The method according to claim 8 wherein the radionuclides are selected from the group consisting of Sr and actinides.

10. A method for selective adsorption and desorption of metal cations under physiological conditions, the method comprising contacting an aqueous solution at physiological pH with the composition of claim 1 .

11. The method according to claim 10 , wherein the metals are selected from the group consisting of Pt, Pd, Gd, Hg, Cd, Au, Ho and combinations thereof.

12. The composition according to claim 1 , wherein the silicate has a total pore volume of at least 0.4 mL/g.

13. The composition according to claim 1 , wherein the silicate has a total pore volume of at least 0.45 mL/g.

Assignees

• Basf Corp
• Base corp

Inventors

• Brandts Jim Aloysius Maria
• Wagemaker Lorianne

Classifications

• C02F1/281

  using inorganic sorbents · CPC title

• B01J29/89 Primary

  Silicates, aluminosilicates or borosilicates of titanium, zirconium or hafnium {(B01J29/005 takes precedence)} · CPC title

• C11C3/10

  Ester interchange · CPC title

• C02F2101/20

  Heavy metals or heavy metal compounds · CPC title

• B01J2229/18

  to introduce other elements into or onto the molecular sieve itself · CPC title