METHOD FOR PRODUCING AN AQUEOUS FOAM, AQUEOUS FOAM OBTAINED BY SUCH A METHOD AND USES THEREOF

• Main Authors: GARONNE, François, SALAS, Jean-Félix, FAURE, Sylvain, BALLAND-LONGEAU, Alexia, CADRA, Stéphane, IMBERT, Bruno
• Format: Patent
• Language: English; French; German
• Published: 12.06.2019
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; AGRICULTURE; ANIMAL HUSBANDRY; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES, AS HERBICIDES; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS; CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING ORPROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; COMPOSITIONS BASED THEREON; EXPLOSIVES; EXPLOSIVES OR THERMIC COMPOSITIONS; FIRE-FIGHTING; FISHING; FORESTRY; GENERAL PROCESSES OF COMPOUNDING; HUMAN NECESSITIES; HUNTING; LIFE-SAVING; MANUFACTURE THEREOF; MATCHES; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PEST REPELLANTS OR ATTRACTANTS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PLANT GROWTH REGULATORS; PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTSTHEREOF; THEIR PREPARATION OR CHEMICAL WORKING-UP; THEIR RELEVANT APPARATUS; TRANSPORTING; TRAPPING; USE OF SINGLE SUBSTANCES AS EXPLOSIVES; WORKING-UP

A method for producing an aqueous foam comprising (a) preparing a solution comprising at least one surfactant and at least one protic polar solvent, (b) bringing the solution into contact with a pressurised gas to obtain a two-phase mixture, and (c) injecting the two-phase mixture to obtain the aqueous foam after expansion or dispersion of the gas. The solution further comprises at least one gelling compound chosen from a non-nitrogenous polysaccharide and gelatin. An aqueous foam obtained by such method and uses of the same, in particular in the fields of decontamination, the purification of effluents, or the defusing or containment of explosive devices or suspected explosive devices.