Polyether polyols - industrial scale manufacture

[CatalysisGuy]

I am trying to gain some insight into industrial scale formation of polyethers - ones that go on to become feedstock material for polyurethanes.

Can anyone shed any light on:

- How are these polymers manufactured industrially? Batch? Continuous flow? Semi-batch?

- What process is used to perform the polymerisation? Catalysts? Pressures? Temperatures?

- How is the polymer product treated after synthesis? Is the catalyst removed? does it need to be mixed with a solvent to aid transfer? etc.

Any industrial insight at all would be very helpful!