# US 10,478,769 B2 · Depollution product for trapping volatile organic compounds, particularly formaldehyde, and method for the production thereof

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- Number: US 10,478,769 B2
- Document ID: US10478769B2
- Status: Granted
- Kind: B2
- Application number: 15/749,590
- Filed: 2016-08-03
- Published: 2018-08-09
- Granted: 2019-11-19
- Earliest claimed: 2015-08-03
- Assignees: Inovame
- Applicants: Inovame
- Inventors: Thierry Miclo; Nelly Piazzon; Frédéric Lanoux; Larisa Dobircau
- Web page: https://patentgrep.com/patent/US10478769B2

## CPC

- B01D 53/0407: {Constructional details of adsorbing systems}
- B01D 53/02: by adsorption, e.g. preparative gas chromatography {(solid sorbent compositions B01J20/00, preparation of inorganic compounds or elements C01)}
- B01D 53/72: Organic compounds not provided for in groups B01D53/48 - B01D53/70, e.g. hydrocarbons
- B01D 53/82: with stationary reactants
- B01J 20/20: comprising free carbon; comprising carbon obtained by carbonising processes
- B01J 20/22: comprising organic material
- B01J 20/2805: {Sorbents inside a permeable or porous casing, e.g. inside a container, bag or membrane}
- B01J 20/28064: {being in the range 500-1000 m2/g}
- B01J 20/2808: {being less than 2 nm, i.e. micropores or nanopores}
- B01J 20/28083: {being in the range 2-50 nm, i.e. mesopores}
- B01J 20/3078: {Thermal treatment, e.g. calcining or pyrolizing}
- B01D 2253/102: Carbon
- B01D 2257/708: Volatile organic compounds V.O.C.'s
- B01D 2258/06: Polluted air
- B01D 2259/4508: for cleaning air in buildings
- B01J 2220/46: Materials comprising a mixture of inorganic and organic materials (materials coated or impregnated on a carrier B01J20/32)
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS

## Abstract

The invention relates to a product that adsorbs VOCs (150), comprising acetoacetamide, said product being characterised in that it consists of granular activated carbon (100) coated with crystallised acetoacetamide (13) on the surface of the granules, leaving free the pores of the channels (10) of the spongy body formed by the granular activated carbon. The invention also relates to a method for producing such a product.

## Claims

### Claim 1

Product adsorbing VOC compounds comprising acetoacetamide, product characterised in that
it comprises active carbon granules, each granule having a surface, pores, channels, and a cavernous body, wherein the granules are coated with acetoacetamide crystallised on the surface of the granules leaving free the pores of the channels of the cavernous body.

### Claim 2 (depends on 1)

Product according to claim 1,
characterised in that
the active carbon comprises active carbon granules with micropores of size less than 2 nm and mesoporous active carbon of size between 2 and 50 nm and a specific surface area of 300 to 3000 m2/g.

### Claim 3 (depends on 1)

Method for the preparation of a product adsorbing VOC compounds, according to claim 1, characterised in that
active carbon is prepared in the form of granules,
the acetoacetamide is melted,
the active carbon granules are added, to the liquid molten acetoacetamide and mixed to coat the granules with the acetoacetamide and then,
the mixture of acetoacetamide-coated active carbon granules is allowed to cool to recrystallise the acetoacetamide on the active carbon granules.

### Claim 4 (depends on 3)

Method according to claim 3,
characterised in that
the acetoacetamide is melted in a water bath at a temperature above its melting point but below its boiling point,
the acetoacetamide is removed from the water bath before the active carbon is added, then
the mixture of acetoacetamide and active carbon is put back into a water bath and mixed until all the liquid acetoacetamide coats the active carbon granules,
the mixture is removed from the water bath and allowed to cool for recrystallisation.

### Claim 5 (depends on 3)

Method according to claim 3,
characterised in that
the active carbon is prepared in the form of granules by dedusting.

### Claim 6 (depends on 3)

Filler of depolluting material obtained according to the method of claim 3, characterised in that
it comprises active carbon granules coated with crystallised acetoacetamide.

### Claim 7 (depends on 6)

Filler of depolluting material according to claim 6, characterised in that
it further comprises dedusted active carbon granules.