"emptied itself" is correct and usable in written English.
You can use the phrase when you want to describe the action of an object or place emptying its contents, such as a pond or a container. For example: "The pond emptied itself of its murky water over the course of the night."
The New Yorker, November 17, 1962 P. 56 A snake emptied itself into the grass.
By David Wevill The New Yorker, November 17, 1962 P. 56 A snake emptied itself into the grass.
Finally, I saw the Browning lying at my feet, but by then the inn had emptied itself of customers and landlord.
Yet, one night, when I crashed on the lavish living room couch after a long day of exploring the American Museum of Natural History, my bladder emptied itself.
Later, I would come to think of it as a necessary transition phase in which my brain emptied itself of life's daily routines and concerns.
The museum emptied itself of 500 visitors and staff members within an hour of the attack on the World Trade towers.
On the other hand, then, emptiness is truly emptiness "only when it empties itself even of the standpoint that represents it as some 'thing' that is emptiness.
Like a living syringe, it gradually empties itself into the victim and takes over its genetic machinery.
"I cannot imagine a UK that closes itself off from Europe and says it will empty itself of all the international minds that make it unique.
If that is true, the universe is fated to empty itself out eventually, and all but the Milky Way's closest neighbors will eventually be out of sight.
"With the single-mindedness of the inebriated," Morrie says, "I crept cautiously past, as if the yawning pit, darker than dark, might empty itself upward over me in an eruption of shadow".
