According to Deuteronomy 24, when can a man divorce his wife?

If he finds some uncleanness in her

When a man hath taken a wife, and married her, and it come to pass that she find no favour in his eyes, because he hath found some uncleanness in her: then let him write her a bill of divorcement, and give it in her hand, and send her out of his house. Deuteronomy 24:1