Some people do have multiple accounts, maybe for backup in case something happens to the main, or to hold more characters, to do things as you described, etc etc.
All provided that you have another email available to use that is all yours or that you have permission to use (recommended it's your own). That would be the email you'd use for it, and as usual no username or password over 16 characters or else it'd be a waste, and make sure the activate the account straight after registering it.
To use both accounts in game at the same time, use two different browsers for each one.