The problem is if I try to connect the gas feed to a plastics plant it gets no gas at all, it's all eaten up by the sulfur which itself looks to be only going about 50% capacity

So..is it WAD that one oil refinery can only produce 50% of the gas needed to run one chemical plant producing either plastic of batteries etc so that you need two oil refineries for every chemical plant using petroleum gas?
(BTW I know you can convert heavy and light oil to gas but you need refining 2 for that which needs blue beakers which need plastic and batteries........Grrrr)