Abstract: Use of diaminopropanes, or of a composition thereof as a dispersing agent to prevent the formation or remove already formed deposits of ammonium salt in hydrocarbon process plants, such as petrochemical or refinery plants.

Abstract: Use of diaminopropanes, or of a composition thereof as a dispersing agent to prevent the formation or remove already formed deposits of ammonium salt in hydrocarbon process plants, such as petrochemical or refinery plants.

Abstract: The present invention relates to a method and to a plant for controlling and/or preventing the colonization of submerged structure surfaces by aquatic filtering organisms based on subjecting waters near said surfaces to at least one biocide treatment, where the provision of the biocide treatment is based on a monitoring to identify phytoplankton biomass values and on a calculating of a period of maximum density of the aquatic filtering organisms.

Abstract: An anti-aging additive composition and an operating method to control the quench oil viscosity in an ethylene production plant are described, capable of raising the yield of said plant through a control of the quench oil viscosity related to a significant increase in the operation temperature of the plant fractionating column, said composition comprising an effective quantity with respect to the aging of said oil of at least one component selected in the group constituted by alkylated phenols, alkylated biphenols, diphenols, alkylated diphenols, aromatic amines and nitroxides, precursors and mixtures thereof.