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1. WO2020023573 - SORBANT ET DISPOSITIFS POUR CAPTURER, STABILISER ET RÉCUPÉRER DES COMPOSÉS VOLATILS ET SEMI-VOLATILS

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

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CLAIMS

1) A method of capturing one or more volatile organic compounds (VOC) or semi volatile organic compounds (SVOC) from a gaseous atmosphere, the method comprising: exposing a mesoporous silica of the MCM-41 type (hexagonal) to an atmosphere comprising the one or more VOC and/or one or more SVOC, thereby capturing the one or more VOC and/or one or more SVOC; wherein

the mesoporous silica possesses a combination of two or more of the following physical properties:

2) A device for passive sampling of volatile organic compound or semi-volatile organic compound in air or gaseous environment, the device comprising:

a sorbent holder comprising one or more unsealable or resealable chambers, at least one of said chambers comprising one or more portions of mesoporous silica sorbent of the MCM-41 type (hexagonal), wherein the mesoporous silica possesses a combination of two or more of the following physical properties:

3) A device for passive sampling of volatile organic compound or semi-volatile organic compound in air or gaseous environment, the device comprising:

a sorbent holder comprising two or more separate and independently unsealable and independently resealable chambers, wherein a first one of said chambers comprises a first portion of sorbent, and a second one of said chambers comprises a second portion of sorbent.

4) The device of claim 3 further comprising a diffuser comprising plural ports, pores or perforations through which said VOC or SVOC must pass to contact said portions of sorbent.

5) A method of providing plural samples of sorbent differing in exposure time limit, the method comprising:

providing a device comprising plural separate sections of sorbent, each section in a respective sealed receptacle;

unsealing a first receptacle comprising a first section of sorbent, exposing said first section to VOC or SVOC for a first period of time, and then sealing the first receptacle; unsealing a second receptacle comprising a second section of sorbent, exposing said second section to VOC or SVOC for a second period of time, and then sealing the second receptacle; wherein

the first and second receptacles can be unsealed at the same or different times.

6) The method of claim 5, wherein: a) the first and second receptacles are separately (independently) sealable; b) the first and second receptacles are separately (independently) unsealable; c) the first period of time is different than the second period of time; d) the first time period is the same as the second time period; e) both receptacles are unsealed at the same time; f) both receptacles are sealed at the same time; g) the receptacles are unsealed at different times; h) the receptacles are sealed at different times; i) the first period of time is less than the second period of time; j) the first period of time is greater than the first period of time; or k) a combination of any two or more thereof.

7) An explosive-containing sorbent, which is not detonable by fire, heat, friction or impact.

8) The explosive-containing sorbent of claim 7 comprising:

one or more explosive materials; and

a mesoporous silica of the MCM-41 type (hexagonal), wherein the mesoporous silica possesses a combination of two or more of the following physical properties:

9) A method of converting a detonable explosive material into a non-detonable form, the method comprising adsorbing the explosive material onto a mesoporous silica of the MCM-41 type (hexagonal), wherein the mesoporous silica possesses a combination of two or more of the following physical properties:

10) A method of neutralizing an explosive-containing sorbent comprising sorbent and one or more explosive materials, the method comprising:

exposing the explosive-containing sorbent to an amount of one or more neutralizing agents for a period of at least 6 h, at least 12 h, at least 18 h, or at least 24 hours.

11) The method of claim 10, wherein: a)

a) the sorbent comprises a mesoporous silica of the MCM-41 type (hexagonal), wherein the mesoporous silica possesses a combination of two or more of the following physical properties:


b) the exposing is conducted in the absence of a fluid;

c) said neutralizing is conducted without detonation of the one or more explosive materials;

d) said one or more types of neutralizing agents are selected from the group consisting of at least one organic acid, at least one surfactant, at least one sulfur-containing inorganic salt, at least one antioxidant, at least one oxidizing agent, at least one reducing agent, and combinations thereof

e) a combination of any two or more of the above.

12) A method of training an explosive-detecting animal to detect one or more VOC or SVOC, the method comprising:

exposing a mesoporous silica of the MCM-41 type (hexagonal) to an atmosphere comprising the one or more VOC and/or one or more SVOC, thereby forming a compound-containing mesoporous silica; and

exposing the animal to the compound-containing mesoporous silica.

13) The method of claim 12 further comprising one or more of the following steps: a) hiding the compound-containing mesoporous silica before exposing the animal to it; b) placing the compound-containing mesoporous silica away from the animal; c) allowing the animal to search for the compound-containing mesoporous silica; d) rewarding the animal after it finds the compound-containing mesoporous silica; e) rewarding the animal when it detects compound released from the compound-containing mesoporous silica; f) selecting an animal that is inquisitive and responsive; g) introducing the animal to the test environment before exposing the animal to the compound-containing mesoporous silica; h) disciplining the animal for conducting undesirable behavior; i) having the animal bond with an animal trainer; j) reducing the amount of the animal’s daily food ration during training; k) reducing or eliminating contaminants in the area (environment) in which training is being conducted; 1) including in the training area one or more control containers or samples not including the compound adsorbed onto the mesoporous silica; m) employing verbal, audio and/or visual commands for the animal; or n) a combination of any two or more of the above.

14) The method of claim 12, wherein the compound used in the training method comprises an explosive, narcotic, controlled substance, abusable drug, a regulated substance, an illegal substance or a derivative or precursor of any thereof.

15) The device of claim 2, wherein the mesoporous silica comprises: a) at least one non-functionalized mesoporous silica; b) at least one functionalized mesoporous silica; or c) a combination of one or more non-functionalized mesoporous silica and one or more functionalized mesoporous silica.

16) The device of claim 15, wherein the weight ratio of non-functionalized mesoporous silica to functionalized mesoporous silica range from about 1 : 100 to about 100: 1.

17) The device of claim 15, wherein the sorbent has been functionalized with one or more adsorption modifier functional groups that improve in at least one aspect the adsorption of particular VOC or SVOC.

18) The device of claim 17, wherein: a) the one or more adsorption modifier functional groups are covalently bound to the porous medium; b) the one or more adsorption modifier functional groups are non-covalently bound to the porous medium; c) the mass content of functional groups in the porous medium as determined by thermogravimetric analysis is in the range of 20-25%; or d) a combination of any two or more thereof.

19) The device of claim 2, wherein the sorbent is silane-functionalized mesoporous silica.

20) The device of claim 19, wherein the silane functionalized mesoporous silica has been functionalized by treating unfunctionalized mesoporous silica with a trialkoxyalkylsilane (R^^OR2^), wherein:

R1 is selected from the group consisting of aromatic group, alkyl group, oxygen- containing alkyl groups, sulfur-containing alkyl groups, nitrogen-containing alkyl groups, phenyl, biphenyl, (Cl-C8)-alkyl, methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, decanyl, undecanyl, methoxytriethyleneoxypropyl,

alkoxyalkyleneoxyalkyl, haloalkyl, halo-(Cl-C8)-alkyl, aminoalkyl, alkoxyalkyl, polyaromatic, toluyl, fluoroalkyls, fluroaromatics, and their combinations; and

R2 is selected from the group consisting of alkyl, Cl-Cl2-alkyl, with methyl, ethyl, and propyl being preferred, thereby forming a silane-functionalized mesoporous silica comprising plural silane groups R1 Si- covalently bound to oxygen molecules of the mesoporous silica.

21) The device of claim 19, wherein the silane functionalized mesoporous silica comprises functional groups with a chemical formula defined as -Si(R1)(OR2)n-Om-, wherein:

R1 is selected from the group consisting of aromatic group, alkyl group, oxygen-containing alkyl group, phenyl, biphenyl, Cl-C8-alkyl, methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, decanyl, undecanyl, methoxytriethyleneoxypropyl, alkoxyalkyleneoxyalkyl, haloalkyl, alkoxyalkyl, polyaromatic, and toluyl;

R2 is selected from the group consisting of alkyl, Cl -Cl 2-alkyl, methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, decanyl, and undecanyl,

thereby forming a silane-functionalized mesoporous silica comprising plural silane groups R1 Si- covalently bound to oxygen molecules of the mesoporous silica; and wherein n is 0, 1 or 2, and m is 2, 1, or 0, respectively.

22) The device of claim 2, wherein, the sorbent releases at least 75 wt % of adsorbed VOC or SVOC when the sorbent is exposed to heat or organic solvent.

23) The device of claim 2, wherein the sorbent releases less than 25% of VOC or SVOC during storage at ambient temperature for a period of at least 1 week.

24) Use of a non-detonable sorbent as described herein.

25) A non-detonable sorbent as described herein.

26) A device comprising a non-detonable sorbent as described herein.

27) A device as described herein.

28) Use of a device as describe herein.

29) A method of use as described herein.

30) A method of manufacturing a non-detonable sorbent as described herein.