Abstract: Systems and methods manage unit operating data of a customer. A customer may be a refinery or any other entity that utilizes unit operating data. Unit operating data may include feed stock data, operations data, yield data, and catalyst data. An analysis service provider analyzes the unit operating data and makes results of the analysis accessible to the customer. The analysis may be based on historical data, industry-wide data, or changes in feed stock data, operations data, yield data, and catalyst data.

Abstract: A process for separating a first hydrocarbon, selected from the group consisting of aromatic hydrocarbons, cycloalkanes, cycloalkenes, cycloalkadienes and combinations thereof, from a close-boiling second hydrocarbon, selected from the group consisting of alkanes, alkenes, and alkadienes and combinations thereof, by extractive distillation of a hydrocarbon-containing fluid containing such hydrocarbons by using a solvent containing a 3-alkyl-substituted-2-oxazolidinone. Such aromatic hydrocarbons contain in the range of from about 6 to about 10 carbon atoms per molecule. Such cycloalkanes, cycloalkenes, cycloalkadienes, and close-boiling second hydrocarbon contain in the range of from about 4 to about 10 carbon atoms per molecule.