Bleach Episode 241titled “Hokori no tame ni! Byakuya VS Renji” means “For the Sake of Pride! Byakuya vs. Renji” is aired on October 13, 2009.
The shinigami discuss Byakuya’s betrayal, and the discovery that if a zanpakuto is killed by anyone other than its owner, it will be unusable. Byakuya returns to the zanpakutos’ hideout, and proves his loyalty by defeating and seemingly killing Sode no Shirayuki, leaving Rukia unable to use her zanpakuto. Rukia and Renji investigate Byakuya’s office, but Byakuya arrives with Senbonzakura, tossing Rukia the broken remains of her zanpakuto.
Source: http://en.wikipedia.org/wiki/List_of_Bleach_episodes_(season_13) and Mega Video