nah. the world is glutted in sulfur. i suspect that Dew is getting at a service company that does more business in countries with high sulfur crudes than other service companies. I think all of the major service companies will see revenues increase as the world's crude oil reserves become progressively more sour. However, one will see a greater revenue increase (in absolute dollar terms) than others.
That’s right, although I would call the sulfur an unwanted element in the feedstock rather than a byproduct. The answer I was seeking is: APD! They are the world’s leading producer of H2 gas, which is used to remove sulfur from sour crude.