/industries/refining/b/weblog/posts/flexible-and-optimized-refining-and-petrochemical-operationsPetrochemical producers and refiners are having to adjust to big changes over the last couple of years. With the large supply of natural gas and natural gas liquids (NGLs) from shale combined with the opening of U.S. oil exports and new LNG exports, pricesen-USTelligent Community 13