Geez thats funny, even money laundering, lol, I like it, however I presume that you also get a pretty solid wanted status as well......You robber NPC traders using interdiction, hacking cargo modules. Than sell it to the black markets, or install one on carrier and sell to the carrier, which will make it clean. Than you can pick it from the storage and sell elsewhere at good price.
Also you can take mission "deliver OUR 3000t of the Tritium to elsewhere" and you deliver it to own carrier over black market. However, now, you will get fee for full price. So this way you will not earn too much of the credits.
Thanx