Method for safe filling with carbon nanotubes, filling system and industrial plant employing this method

1. A method for filling a second receptacle with carbon nanotubes from a first receptacle comprising: passing carbon nanotubes from said first receptacle to said second receptacle by means of a coupling ( 300 ) comprising a double-valve device ( 30 ) comprising a first valve coupled to said first receptacle and a second valve coupled to said second receptacle, said valves of the butterfly valve type, said valves ( 31 , 32 ) closing independently and tightly and being openable only when they are coupled to one another, wherein one of said first valve or said second valve is an active valve comprising an opening control and the other valve is a passive valve that does not comprise an opening control, and said opening control of said active valve is locked when the two valves are not coupled.

2. The method according to claim 1 , characterized in that said first valve comprises the active valve and said first receptacle is a container and said second valve comprises the passive valve and said second receptacle is a metering device.

3. The method according to claim 1 , characterized in that said first valve comprises the active valve and said first receptacle is a storage hopper and said second valve is the passive valve and said second receptacle is a container.

4. The method according to claim 1 , characterized in that the carbon nanotubes are in the form of bundles.

5. The method according to claim 1 , characterized in that the carbon nanotubes are in the form of bundles which exist as a powder of a range of particle sizes having a mean diameter of about 400 microns.

6. The method according to claim 1 , additionally comprising screening the nanotubes.

7. The method according to claim 1 , additionally comprising inerting the carbon nanotubes.