Facebook is banned in a number of institutions and companies during work hours because it is considered as wastage of time. Companies prefer to use some other social networks like LinkedIn for professional usage.
According to Financial Times, Facebook is developing an entirely new social network for professional use in offices. It will be focused mainly on your work instead of your personal Facebook profile.
It will be called Facebook at Work. According to a report, Facebook for Work is already being used by Facebook employees in their offices. So it will not take a lot of time to launch the service publically.
Facebook at Work will have almost the same user interface as the original Facebook. It will be enhanced to interact with company employees easily and will be optimized for documents. Company may offer some document editing tools like Google Docs.