Arc reactor and process for producing nanoparticles

Arrangement of at least two arc reactors for producing nanoparticles from a raw material melt comprising:

• a common housing of the at least two arc reactors, a crucible in the common housing, the crucible being connected to an anode, and a cathode spaced a distance away from an opening of the crucible, the common housing comprising a carrier gas inlet for each of the at least two arc reactors entering into the housing below the crucible, and a carrier gas outlet for each of the at least two arc reactors exiting above the crucible, wherein at a distance above the crucible there is disposed a hood separated from the crucible, a terminal cross-section of which hood spans at least over the opening of the crucible, the hood being connected to the carrier gas outlet by an exhaust pipe and the housing having at least one inlet for cooling gas directed towards an interstice between the crucible and the hood, wherein at least two carrier gas outlets of the at least two arc reactors are each are connected by a vertical outlet pipe to a common horizontal primary connecting pipe disposed above the vertical outlet pipes, the primary connecting pipe having a secondary horizontal outlet pipe connected between the outlet pipes and disposed above the primary connecting pipe;
• wherein at least two of the carrier gas inlets are connected to a common carrier gas line, from which feed lines branch off to each of the at least two carrier gas inlets, wherein the feed lines each have the same flow resistance and the same internal cross-section and no flow controller, and wherein the outlet pipes are connected to a common outlet pipe, which is connected to a separating device for the separation of nanoparticles from gas, and the separating device has a gas outlet that is connected to a cooling device for gas, the gas outlet of which is connected to the common carrier gas line.