Facebook can be used to promote your business and interact with co-workers, clients and suppliers, but Facebook is not a practical tool for every business, and for some it is a distraction in the workplace. You can deactivate your Facebook account via the Security page of your Account Settings screen. Deactivating your account deletes your Timeline and removes all information you have posted on Facebook.
Click the downward-facing account menu arrow in the top right corner of any Facebook page.
Click "Account Settings" on the drop-down menu.
Click "Security" on the menu along the left side of the Account Settings screen.
Click the "Deactivate your account" link.
Scroll down and select the radio button next to the reason you are leaving Facebook.
Click "Email opt out" check box to opt out of receiving future emails from Facebook. This step is optional.
Click the "Confirm" button to cancel your Facebook account.