Auto-Create PO After Requisition Is Approved

Is there a way to automatically create a blanket release (or Purchase order based on a Blanket) once the requisition is approved?
Moreover that PO must go out directly to the vendor without any intervention form the Procurement department.

Released PO can also be based on a contract PO if the blanket doesn’t allow it.

Looking a solution to relief burdens out of the buyers’ shoulders. Buyers are responsible to find vendors, negociate prices & conditions. This is where their value resides, not in a tedious process of converting approved requisitions into purchase orders.