North Charleston, South Carolina-headquartered Ingevity announced a general price increase of 10%-15% effective April 1, or as contracts allow, for all merchant and derivatized tall oil rosin and tall oil fatty acid products associated with its industrial specialties and oilfield technologies portfolios. Factors cited include strong market demand and increasing raw material costs.  Lexington, Kentucky-based Valvoline appointed Mahmoud (Mack) Sharaf to serve as the company’s treasurer and chief liaison to the investment community.