Method for preparing a solid material for storing ozone, the material and the uses thereof

Patent metadata

Field	Value
Publication number	US-12434967-B2
Application number	US-202017422709-A
Country	US
Kind code	B2
Filing date	Jan 14, 2020
Priority date	Jan 14, 2019
Publication date	Oct 7, 2025
Grant date	Oct 7, 2025

Abstract

The present invention relates to a method and a unit for preparing a solid material for storing ozone, said method comprising contacting cyclodextrins and/or derivatives of cyclodextrins in solid form with a gas comprising ozone, by means of which a solid material for storing ozone is obtained. The present invention also relates to the material thus prepared and to the uses thereof.

First claim

The invention claimed is:

1. A process for preparing a solid ozone storage material comprising contacting cyclodextrins and/or cyclodextrin derivatives in solid form with a gas comprising ozone, whereby a solid ozone storage material is obtained,
wherein said cyclodextrin derivative is a chemically modified, cross-linked, immobilized cyclodextrin and/or organized in a molecular superstructure,
wherein a chemically modified cyclodextrin is a cyclodextrin of which at least one hydrogen atom and/or at least one hydroxyl radical is substituted with an atom or chemical group selected from a halogen atom, an alkyl group, a hydroxyalkyl group, a thioalkyl group, a sulfhydryl group, an acetyl group, a silyl group, an acyl group, a sulphonyl group, an amine group, a sulphoalkylether group, a sulphate group, a phosphate group, a carboxyl group, a carboxylester group, a quaternary ammonium group, a glucosyl group, a maltosyl group or a chlorotriazinyl group, and
wherein, when contacted with the gas comprising ozone, the cyclodextrins and/or cyclodextrin derivatives are free of any molecule different from a water molecule and capable of reacting with ozone.

2. The process of claim 1 , characterised in that said cyclodextrins and/or said cyclodextrin derivatives are selected from the group consisting of α-CDs, β-CDs, γ-CDs, hydroxypropylated α-CDs, hydroxypropylated β-CDs, hydroxypropylated γ-CDs, dimethylated α-CDs, dimethylated β-CDs, dimethylated γ-CDs; sulfobutylether α-CDs, sulfobutylether-β-CDs, sulfobutylether γ-CDs, sulfated α-CDs, sulfated β-CDs, sulfated γ-CDs, phosphated α-CDs, phosphated β-CDs, phosphated γ-CDs; carboxymethylated α-CDs, carboxymethylated β-CDs, carboxymethylated γ-CDs, carboxymethylether α-CDs, carboxymethylether β-CDs, carboxymethylether γ-CDs, 3-trimethylammonium-2-hydroxypropyl-ether α-CDs; 3-trimethylammonium-2-hydroxypropyl-ether β-CDs; 3-trimethylammonium-2-hydroxypropyl-ether γ-CDs; cross-linked cyclodextrin derivatives and mixtures thereof.

3. The process of claim 1 , characterised in that said process has a step prior to contacting said cyclodextrins and/or said cyclodextrin derivatives with said gas comprising ozone aiming at either removing all or part of water molecules present in cavities of said cyclodextrins and/or said cyclodextrin derivatives, or replacing all or part of water molecules present in the cavities of the cyclodextrins and/or cyclodextrin derivatives with a non-ozone reactive substance.

4. The process of claim 1 , characterised in that said gas comprising ozone is a gas mixture comprising ozone and at least one other gas such as dioxygen, carbon dioxide, nitrogen or a mixture thereof.

5. The process of claim 1 , characterised in that contacting between said cyclodextrins and/or said cyclodextrin derivatives and said gas comprising ozone is carried out at a temperature between 0° C. and 80° C.

6. The process of claim 1 , characterised in that contacting between said cyclodextrins and/or said cyclodextrin derivatives and said gas comprising ozone lasts between 1 min and 8 h.

Assignees

• Inst Nat Polytechnique Toulouse
• Ecole Dingenieurs De Purpan
• Univ Toulouse 3 Paul Sabatier
• Centre Nat Rech Scient
• Institut National De Rech Pour Lagriculture Lalimentation Et Lenvironnement

Inventors

• Torre Jean-Philippe
• Pages-Homs Marielle
• Violleau Frédéric
• Manero Marie-Hélène
• Richard Romain

Classifications

• A61L2103/75

  Room floors or walls · CPC title

• C02F2303/04

  Disinfection · CPC title

• C02F1/78

  with ozone {(C02F1/4672 takes precedence)} · CPC title

• C02F1/50

  by addition or application of a germicide or by oligodynamic treatment {(C02F1/4606, C02F1/467, C02F1/76 take precedence)} · CPC title

• B01J20/24

  Naturally occurring macromolecular compounds, e.g. humic acids or their derivatives · CPC title