Houston-based Kraton Corp. announced a general price increase of 15%-20% across its crude tall oil refinery products and derivatives, effective Jan. 1, 2022. Its distilled tall oils are used in production of metalworking fluids and oil field chemicals, as well as soaps, cleaners and alkyd resins. Dallas-headquartered HollyFrontier Corp. promoted Tim Go to president and chief operating officer, with oversight over its refining segment and its lubricants and specialty products segment. Mike Jennings, who previously served as CEO and president, will continue to serve CEO.