Chemical processing cell with nanostructured membranes

Patent metadata

Field	Value
Publication number	US-9174173-B2
Application number	US-201213459323-A
Country	US
Kind code	B2
Filing date	Apr 30, 2012
Priority date	Sep 9, 2011
Publication date	Nov 3, 2015
Grant date	Nov 3, 2015

Abstract

A chemical processing cell includes an upstream membrane and a downstream membrane. The upstream membrane generates a first reaction product. The downstream membrane converts the first reaction product to a second reaction product.

First claim

What is claimed:

1. A chemical processing cell, comprising:
an upstream membrane generating hydrogen peroxide from a starting material, wherein said upstream membrane is a layer-by-layer assembly of glucose oxidase in a regenerated cellulose membrane; and
a downstream membrane decomposing said hydrogen peroxide generated by said upstream membrane, wherein said downstream membrane is a poly(vinylidene fluoride) membrane with poly(acrylic acid) functionalized pores containing immobilized metal, iron, metal ion, iron ion, iron oxide nanoparticles, iron oxyhydroxide nanoparticles, ferrihydrite nanoparticles and mixtures thereof.

2. The cell of claim 1 , wherein said downstream membrane further comprises an immobilized catalase enzyme that decomposes hydrogen peroxide produced by said upstream membrane into water and oxygen.

3. The cell of claim 1 , wherein glucose oxidase occupies pores of the upstream membrane.

4. The cell of claim 1 , further including a housing holding said upstream membrane and said downstream membrane in a flow pathway.

5. A method of detoxifying a water supply, comprising:
passing said water supply containing a target chemical and a hydrogen peroxide precursor through the cell of claim 1 ;
generating hydrogen peroxide from said hydrogen peroxide precursor; and
decomposing said hydrogen peroxide generated by said upstream membrane into free radical oxidants that oxidize said target chemical.

6. The method of claim 5 including providing glucose as said hydrogen peroxide precursor and reacting said glucose with glucose oxidase immobilized in pores of said upstream membrane to produce said hydrogen peroxide.

7. The method of claim 6 including reacting said hydrogen peroxide generated by said upstream membrane with metal, iron, metal ion, iron ion, iron oxide nanoparticles, iron oxyhydroxide nanoparticles, ferrihydrite nanoparticles and mixtures thereof immobilized in pores of said downstream membrane to produce said free radical oxidants.

8. The method of claim 7 including reacting said target chemical with said free radical oxidants in said pores of said downstream membrane.

9. A method of generating gluconic acid comprising:
passing glucose through the cell of claim 1 ;
generating hydrogen peroxide and gluconic acid from said glucose; and
decomposing said hydrogen peroxide generated by said upstream membrane into water and oxygen.

10. The method of claim 9 including reacting said glucose with glucose oxidase immobilized in pores of said upstream membrane to produce hydrogen peroxide and gluconic acid.

11. The method of claim 10 , including reacting hydrogen peroxide generated by said upstream membrane with catalase enzyme immobilized in pores of said downstream membrane to produce said water and said oxygen.

12. A method of chemical processing, comprising:
passing a starting material into a first plurality of pores in the upstream membrane of the cell of claim 1 ;
reacting said starting material with glucose oxidase in said first plurality of pores in said upstream membrane so as to produce a first reaction product;
passing said first reaction product into a second plurality of pores in the downstream membrane; and
reacting said first reaction product with immobilized metal, iron, metal ion, iron ion, iron oxide nanoparticles, iron oxyhydroxide nanoparticles, ferrihydrite nanoparticles and mixtures thereof in said second plurality of pores in said downstream membrane so as to produce a second reaction product.

13. The method of claim 12 including controlling residence time of said starting material in said first plurality of pores and residence time of said first reaction product in said second plurality of pores.

14. The cell of claim 1 , wherein functionalized pores of said downstream membrane comprise an immobilized metal.

15. The cell of claim 1 , wherein functionalized pores of said downstream membrane comprise immobilized iron.

16. The cell of claim 1 , wherein functionalized pores of said downstream membrane comprise immobilized metal ions.

17. The cell of claim 1 , wherein functionalized pores of said downstream membrane comprise immobilized iron ions.

18. The cell of claim 1 , wherein functionalized pores of said downstream membrane comprise immobilized iron oxide nanoparticles.

19. The cell of claim 1 , wherein functionalized pores of said downstream membrane comprise immobilized iron oxyhydroxide nanoparticles.

20. The cell of claim 1 , wherein functionalized pores of said downstream membrane comprise immobilized ferrihydrite nanoparticles.

Assignees

• Bhattacharyya Dibakar
• Lewis Scott R
• Datta Saurav
• Univ Kentucky Res Found

Inventors

• Bhattacharyya Dibakar
• Lewis Scott R
• Datta Saurav

Classifications

• B01D67/0079

  Manufacture of membranes comprising organic and inorganic components · CPC title

• B01D67/0088

  Physical treatment with compounds, e.g. swelling, coating or impregnation · CPC title

• B82Y40/00

  Manufacture or treatment of nanostructures · CPC title

• B01D2323/40

  in-situ membrane formation · CPC title

• B01D71/022

  Metals · CPC title