Saudi Arabian Oil Company

Saroj Kumar Panda

Omer Refa Koseoglu

Robert Peter Hodgkins

Hendrik Muller

Adnan Al-Hajji

Mohamed Elanany

Sarafaraz Alam

Amal Lajami

Abdullah A Al-Zahrani

The disclosure relates to methods to estimate the carbon number of an alkyl substituent (number of carbon atoms in the alkyl substituent) of an aromatic compound using a gel permeation chromatography (GPC) retention time and prediction models.

Estimation of alkyl substituent carbon number of aromatic compounds using gel permeation chromatography retention time and prediction models

Disclosed are methods and systems for quantitation of benzene, toluene, ethyl benzene, o-xylene, m-xylene, and p-xylene in aromatics recovery complexes. High-performance liquid chromatography using a carbon stationary phase and a gradient mobile phase is performed. The carbon stationary phase can be a porous graphitic carbon stationary phase. The mobile phase includes an organic acid in water and an alcohol. The organic acid can include formic acid, and the alcohol can include methanol. The methods and systems achieve a resolution between xylene isomer peaks of greater than 2.0 when sampling industrial process streams in aromatic recovery complexes.

Optimization of p-xylene recovery by integration of HPLC into aromatics recovery complex

Disclosed are methods and systems for quantitation of benzene, toluene, ethyl benzene, o-xylene, m-xylene, and p-xylene. High-performance liquid chromatography using a carbon stationary phase and a gradient mobile phase is performed. The carbon stationary phase can be a porous graphitic carbon stationary phase. The mobile phase includes an organic acid in water and an alcohol. The organic acid can include formic acid, and the alcohol can include methanol. The methods and systems achieve a resolution between xylene isomer peaks of greater than 2.0.

Method for separation and quantitation of benzene, toluene, ethyl benzene, o-xylene, m-xylene, and p-xylene (BTEX) using high performance liquid chromatography

A method and a system for predicting a molecular weight of a hydrocarbon fluid are provided. An exemplary method includes measuring a density of the hydrocarbon fluid, obtaining an alternative measurement of a physical property of the hydrocarbon fluid, calculating an index value for the hydrocarbon fluid from the alternative measurement, and calculating a predicted molecular weight using an equation that combines the density with the index value. The predicted molecular weight is provided as an output.

Estimating molecular weight of hydrocarbons

A system and a method are provided for calculating the cetane number, pour point, cloud point, aniline point, and/or octane number of a crude oil and its fractions from the density and gel permeation chromatography data of a sample of the crude oil.

System and method of characterizing crude oil by gel permeation chromatography (GPC)

A system and a method are provided for calculating one or more indicative properties, e.g., one or more of the cetane number, octane number, pour point, cloud point and aniline point of oil fractions, from the density and high pressure liquid chromatography (HPLC) data of a sample of the crude oil.

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Dhahran, Saudi Arabia

Saroj Kumar Panda