# US 11,897,764 B2 · Porphyrazines as efficient, catalytic and scalable method to produce chlorine dioxide

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- Number: US 11,897,764 B2
- Document ID: US11897764B2
- Status: Granted
- Kind: B2
- Application number: 17/550,448
- Filed: 2021-12-14
- Published: 2022-03-31
- Granted: 2024-02-13
- Earliest claimed: 2010-08-23
- Assignees: The Trustees of Princeton University
- Applicants: The Trustees of Princeton University
- Inventors: John T. Groves; Roy Xiao
- Web page: https://patentgrep.com/patent/US11897764B2

## CPC

- C01B 11/024: {from chlorites}
- A61L 2/18: Liquid substances
- B01J 31/2295: {Cyclic compounds, e.g. cyclopentadienyls}
- B01J 31/26: containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24
- C07F 15/025: {without a metal-carbon linkage}
- D21C 9/14: with ClO2 or chlorites
- B01J 31/1815: {with more than one complexing nitrogen atom, e.g. bipyridyl, 2-aminopyridine}
- B01J 31/183: {with more than one complexing nitrogen atom, e.g. phenanthroline}
- B01J 2531/025: Ligands with a porphyrin ring system or analogues thereof, e.g. phthalocyanines, corroles
- B01J 2531/842: Iron
- C02F 1/76: with halogens or compounds of halogens {(C02F1/4674 takes precedence)}
- C02F 2103/023: {Water in cooling circuits}
- C02F 2303/04: Disinfection
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- A61L: METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES (preservation of bodies or disinfecting characterised by the agents employed A01N; preserving, e.g. sterilising, food or foodstuffs A23; preparations for medical, dental or toiletry purposes A61K)
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- C07F: ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM (metal-containing porphyrins C07D487/22)
- D21C: PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- C02F: TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE (separation in general B01D; special arrangements on waterborne vessels of installations for treating water, waste water or sewage, e.g. for producing fresh water, B63J; adding materials to water to prevent corrosion C23F; treating radioactively-contaminated liquids G21F9/04; regeneration of reactants for recirculation into processes, see the relevant places for the processes)

## Abstract

Methods, kits, cartridges, and compounds related to generating chlorine dioxide by exposing ClO2− to at least one of an iron porphyrin catalyst or an iron porphyrazine catalyst are described.

## Claims

### Claim 1

A cartridge comprising a housing and at least one of a manganese porphyrin catalyst or a manganese porphyrazine catalyst in the housing, wherein the cartridge is adapted to allow reactants to contact the at least one of a manganese porphyrin catalyst or a manganese porphyrazine catalyst, and the cartridge further comprises at least one of the reactants or a source of ClO2−, and the reactants comprise ClO2−.

### Claim 2 (depends on 1)

The cartridge of claim 1, wherein the cartridge comprises the reactants.

### Claim 3 (depends on 2)

The cartridge of claim 2, wherein the ClO2− is in the form of chlorite salts.

### Claim 4 (depends on 2)

The cartridge of claim 2, wherein the ClO2− is mixed with a solid filler.

### Claim 5 (depends on 2)

The cartridge of claim 2, wherein the ClO2− is adsorbed on at least one substance selected from the group consisting of clay, silica, alumina and organic polymers.

### Claim 6 (depends on 1)

The cartridge of claim 1, wherein at least one of the manganese porphyrin catalyst or the manganese porphyrazine catalyst is adsorbed on a solid support.

### Claim 7 (depends on 1)

The cartridge of claim 1 comprising the source of ClO2−, wherein the at least one of the manganese porphyrin catalyst or the manganese porphyrazine catalyst and the source of ClO2− are separated by an interface.

### Claim 8 (depends on 7)

The cartridge of claim 7, wherein the interface is a solid material configured to allow mixing of the at least one of the manganes porphyrin catalyst or the manganese porphyrazine catalyst with the source of ClO2− upon mechanical disruption of the interface.

### Claim 9 (depends on 8)

The cartridge of claim 8, wherein the source of ClO2− is a chlorite salt.

### Claim 10 (depends on 8)

The cartridge of claim 8 wherein the mechanical disruption includes breaking of the solid material.

### Claim 11 (depends on 8)

The cartridge of claim 8, wherein the mechanical disruption includes dissolution of the solid material.

### Claim 12 (depends on 1)

The cartridge of claim 1 comprising the source of ClO2−, wherein the housing includes a first compartment and a second compartment, and the at least one of a manganese porphyrin catalyst or a manganese porphyrazine catalyst is in the first compartment and the source is in the second compartment.

### Claim 13 (depends on 12)

The cartridge of claim 12, wherein at least one of the manganese porphyrin catalyst or the manganese porphyrazine catalyst is adsorbed on a solid support.

### Claim 14

A kit for generating chlorine dioxide comprising a catalyst selected from at least one a manganese porphyrin catalyst, and a manganese porphyrazine catalyst, and instructions to combine the catalyst with ClO2−.

### Claim 15 (depends on 14)

The kit of claim 14, wherein the ClO2− is in the form of at least one substance selected from the group consisting of chlorite salts.

### Claim 16 (depends on 14)

The kit of claim 14, wherein the ClO2− in the form of at least one substance selected from the group consisting of sodium chlorite, potassium chlorite, calcium chlorite and magnesium chlorite.

### Claim 17 (depends on 14)

The kit of claim 14, wherein the ClO2− is mixed with a solid filler.

### Claim 18 (depends on 14)

The kit of claim 14, wherein the ClO2− is adsorbed on at least one substance selected from the group consisting of clay, silica, alumina and organic polymers.

### Claim 19 (depends on 14)

The kit of claim 14, wherein at least one of the manganese porphyrin catalyst and the manganese porphyrazine catalyst is adsorbed on a solid support.

### Claim 20 (depends on 19)

The kit of claim 19, wherein the solid support includes a substance selected from the group consisting of clay, silica, alumina, glass beads, functionalized polystyrene or organic polymers.