Porous catalytic matrices for elimination of toxicants found in tobacco combustion products

Patent metadata

Field	Value
Publication number	US-10182593-B2
Application number	US-201214236085-A
Country	US
Kind code	B2
Filing date	Aug 1, 2012
Priority date	Aug 1, 2011
Publication date	Jan 22, 2019
Grant date	Jan 22, 2019

Abstract

Described herein are compositions and methods for capturing carbonylic or phenolic toxicants, or converting these toxicants into less volatile compounds. The toxicants, which may be a component of cigarette smoke, may be captured by physical or chemical adsorption, absorption, or entrapment.

First claim

We claim:

1. A smoking article, comprising a tobacco rod; and a filter element, comprising a hybrid metal-organic framework (MOF) matrix, and a fiber; wherein
the hybrid MOF matrix comprises a dopant and a plurality of metal ions or clusters coordinated to a plurality of polydentate organic ligands selected from the group consisting of terephthalic acid, isophthalic acid, 2-aminoterephthalic acid, acetate-muconic acid, and a mixture thereof; wherein
the dopant is selected from the group consisting of a nucleophilic amine, a polyoxometalate (POM) and a nucleophilic amine, phosphotungstic acid (PTA), and aluminum isopropoxide;

the metal ion or cluster comprises Al, Cr, or Fe;
the filter element reduces the quantity of a toxicant; and
the filter element is attached to the tobacco rod.

2. The smoking article of claim 1 , wherein the metal ion or cluster comprises Fe.

3. The smoking article of claim 1 , wherein the polydentate organic ligand is selected from the group consisting of terephthalic acid, isophthalic acid, 2-aminoterephthalic acid, and a mixture of acetate-muconic acid and terephthalic acid.

4. The smoking article of claim 1 , wherein the polydentate organic ligand is selected from the group consisting of terephthalic acid, 2-aminoterephthalic acid, and a mixture of acetate-muconic acid and terephthalic acid.

5. The smoking article of claim 1 , wherein the metal ion or cluster comprises Al.

6. The smoking article of claim 1 , wherein the metal ion or cluster comprises Cr.

7. The smoking article of claim 1 , wherein the dopant is a nucleophilic amine.

8. The smoking article of claim 7 , wherein the polydentate organic ligand is selected from the group consisting of terephthalic acid, isophthalic acid, 2-aminoterephthalic acid, and a mixture of acetate-muconic acid and terephthalic acid.

9. The smoking article of claim 8 , wherein the metal ion or cluster comprises Fe.

10. The smoking article of claim 8 , wherein the metal ion or cluster comprises Al.

11. The smoking article of claim 8 , wherein the metal ion or cluster comprises Cr.

12. The smoking article of claim 7 , wherein the nucleophilic amine is dimethylaminopyridine (DMAP).

13. The smoking article of claim 1 , wherein the dopant is a polyoxometalate (POM) and a nucleophilic amine.

14. The smoking article of claim 13 , wherein the polydentate organic ligand is selected from the group consisting of terephthalic acid, 2-aminoterephthalic acid, and a mixture of acetate-muconic acid and terephthalic acid.

15. The smoking article of claim 14 , wherein the metal ion or cluster comprises Fe.

16. The smoking article of claim 14 , wherein the metal ion or cluster comprises Al.

17. The smoking article of claim 14 , wherein the metal ion or cluster comprises Cr.

18. The smoking article of claim 13 , wherein the nucleophilic amine is dimethylaminopyridine (DMAP).

19. The smoking article of claim 1 , wherein the dopant is phosphotungstic acid (PTA).

20. The smoking article of claim 1 , wherein the dopant is aluminium isopropoxide.

Assignees

• Bromberg Lev E
• Hatton Trevor A
• Massachusetts Inst Technology

Inventors

• Bromberg Lev E
• Hatton Trevor A

Classifications

• A24D3/0287 Primary

  for composite filters · CPC title

• B01J20/28038

  Membranes or mats made from fibers or filaments · CPC title

• B01J20/3208

  Polymeric carriers, supports or substrates · CPC title

• B01J20/226

  Coordination polymers, e.g. metal-organic frameworks [MOF], zeolitic imidazolate frameworks [ZIF] (preparation of metal complexes containing carboxylic acid moieties C07C51/418; MOF's per se C07F) · CPC title

• A24D3/10

  of cellulose or cellulose derivatives · CPC title