# US 8,772,357 B2 · Decontamination, stripping and/or degreasing foam containing solid particles

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- Number: US 8,772,357 B2
- Document ID: US8772357B2
- Status: Granted
- Kind: B2
- Application number: 12/525,836
- Filed: 2008-02-14
- Published: 2010-03-18
- Granted: 2014-07-08
- Earliest claimed: 2007-02-15
- Assignees: Commissariat a l'Energie Atomique; Areva Nc
- Applicants: Sylvain Guignot; Sylvain Faure
- Inventors: Sylvain Guignot; Sylvain Faure
- Web page: https://patentgrep.com/patent/US8772357B2

## CPC

- C11D 3/0094: {High foaming compositions}
- C11D 3/042: {Acids}
- C11D 3/044: {Hydroxides or bases}
- C11D 3/12: Water-insoluble compounds
- C11D 3/37: Polymers {(polymeric surface-active agents C11D1/008; polysaccharides C11D3/222)}
- C11D 17/0013: {Liquid compositions with insoluble particles in suspension (C11D17/0021, C11D17/0026, C11D17/003 take precedence)}
- C11D 2111/20: Industrial or commercial equipment, e.g. reactors, tubes or engines
- C11D 2111/42: Application of foam or a temporary coating on the surface to be cleaned
- C11D: DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL

## Abstract

A stabilized foam formed from a foaming aqueous solution comprising from 0.1 to 7 mol of one or more decontamination, stripping and/or degreasing reactants per liter of solution and from 0.01 to 15% by weight of a solid stabilizing agent of solid particles type, with respect to the total weight of the solution, and a process for the preparation of said stabilized foam, to its use in decontaminating, stripping and/or degreasing a surface and to a process for decontaminating, stripping and/or degreasing a surface.

## Claims

### Claim 1

A stabilized foam composed of a dispersion of bubbles of air in a foaming aqueous solution, comprising:
from 0.1 to 7 mol of one or more decontamination, stripping and/or degreasing agent per liter of solution; and
from 0.01 to 25% by weight with respect to the total weight of the solution, of solid particles of identical nature or of mixtures of solid particles of different nature, said solid particles presenting foaming properties,
wherein said solid particles presenting foaming properties are solid entirely mineral particles functionalized by having hydrophobic organic molecules grafted thereon.

### Claim 2 (depends on 1)

The stabilized foam as recited in claim 1, further comprising at least solid particles presenting sorbing properties.

### Claim 3 (depends on 1)

The stabilized foam as recited in claim 1,
wherein the entirely mineral particles are made of phosphotungstic acid, of nickel ferrocyanide or of oxide, of hydroxide, of carbonate, of sulfate, of nitrate, of oxalate and/or of titanate of one or more entity(ies) chosen from alkali metals, alkaline earth metals, transition metals and semimetals.

### Claim 4 (depends on 1)

The stabilized foam as recited in claim 1,
wherein said decontamination, stripping and/or degreasing agent is selected from the group consisting of an acid or a mixture of acids, a base or a mixture of bases, an oxidizing agent, a reducing agent, a disinfecting agent, an antioxidant, an antiseptic agent and their mixtures.

### Claim 5 (depends on 1)

The stabilized foam as recited in claim 1,
wherein said foaming aqueous solution additionally comprises a surface-active agent, an inorganic oxidizing agent, a complexing agent and/or an organic gelling agent.

### Claim 6 (depends on 4)

The stabilized foam as recited in claim 4, wherein said foaming aqueous solution comprises:
a single surface-active agent or a mixture of at least two surface-active agents chosen from nonionic foaming surfactants, anionic or cationic foaming surfactants, amphoteric surfactants, surfactants with a bolaform structure, surfactants with a Gemini structure and polymeric surfactants.

### Claim 7

A process for the preparation of a stabilized foam composed of a dispersion of bubbles of air in a foaming aqueous solution, the process comprising:
mixing together from 0.1 to 7 mol of one or more decontamination, stripping and/or degreasing agent per liter of solution; and from 0.01 to 25% by weight with respect to the total weight of the solution, of solid particles of identical nature or of mixtures of solid particles of different nature, said solid particles presenting foaming properties, wherein said solid particles presenting foaming properties are solid entirely mineral particles functionalized by having hydrophobic organic molecules grafted thereon.