Distinct naphthenic acid (NA) species were isolated from oil sands process water (OSPW) into 20 fractions via silver-ion solid phase extraction, prior to treatment using potassium ferrate(VI). Untreated and treated fractions F1F20 were characterized…
Detailed molecular analysis of complex mixtures such as crude oil and its fractions has been successfully covered by a number of groups during the past two decades. On the other side, the most glaring need is some type of method that allows…
Abstract: Molecular-mass distribution curves of native nanoasphaltenes in the form of fractograms for a significant sample of crude oils have been obtained using the thermal field-flow fractionation of asphaltenes, and a multidimensional analysis of…
A new series of sulfobetaine surfactants with double-chain single-head structure were derived from 1,3-dialkyl glyceryl ethers and their performances in reducing Daqing crude oil/connate water interfacial tension (IFT) in the absence of alkali were…
Polar compounds from three Brazilian crude oils were isolated and separated into seven fractions according to the polarity (low polarity-LP, low medium polarity-LMP, high medium polarity-HMP, high polarity-HP, basic-BAS, acidic-AC) by using…
Abstract: Specific features of the distribution of vanadium and nickel duringfractionation of heavy oil resins were examined using the example of heavysulfurous oils from the Permian and Carboniferous deposits of the Volga-Uralsoil and gas basin…
1-Ethyl-3-(3-dimethylaminopropyl) carbodiimide (EDC) is widely used as a crosslinker for fluorescence labeling of protein in the fields of biochemistry and food analysis. Many natural polysaccharides often contain some proteins or peptides that are…
A thermal processing of waste tires in the presence of a natural zeolite catalyst from the "Tayzhuzgen" field (Eastern Kazakhstan) is detailed. The hydrogen sources utilized were heavy residues from oil refinement. The elemental and phase composition…
In recent years, ASP flooding has been widely applied and obtained the remarkable effect. During the ASP flooding process, the oil composition has a great effect on the interfacial tension, which plays a vital role in the oil displacement effect.…
Recent analytical advances have provided evidence that groundwater affected by oil sands process-affected water (OSPW) is reaching the Athabasca River at one location. To understand and discriminate the toxicological risks posed by OSPW-influenced…
Incremental oil recovery due to polymer flooding results from acceleration of oil production along flow paths and improving sweep efficiency. To achieve favorable economics, polymers should have a high viscosifying power and low adsorption. However,…
Given the ill-defined term “naphthenic acids” (NAs), we will classify NAs as the carboxylic acids found naturally in crude oil, which include both classic NAs (c-NAs, monoacids) and ox-NAs (polyacids). Resulting from the biodegradation mainly of…
Marine mammals are top predators of the marine food chain and thus known to bioaccumulate high concentrations of polyhalogenated compounds. Yet, details of the organohalogen pattern are largely unknown. For this reason, we isolated the…
Scope: These test methods cover the determination of the amounts of the individual fatty acids and rosin acids in fractionated tall oil products, using capillary gas chromatographic separation of the volatile methyl esters of these acids. Four…
In this paper we isolated resins from a sample of extra heavy oil and from the products of catalytic aquathermolysis in the presence of a cobalt based catalyst and studied their structure. In fact, an oil fraction and 4 resin fractions (R1-R4) have…
Petroleum sulfonates are widely used in chemical flooding in China. The samples are complicated and not all the fractions are effective. To recognize effective fraction with excellent interfacial activity and emulsifying property, a preparative…
Characterization of heteroatom compounds in crude oils is very important in petroleum production and processing. The ultrahigh-resolution Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) is a powerful MS technique for it but…
A combination of multi-dimensional supercritical fluid chromatography and field ionization time-of-flight mass spectrometry (SFC FI-TOF MS) is developed for the detailed analysis of olefins and other hydrocarbon types in total petroleum liquid…
Given the ill-defined term “naphthenic acids” (NAs), we will classify NAs as the carboxylic acids found naturally in crude oil, which include both classic NAs (c-NAs, monoacids) and ox-NAs (polyacids). Resulting from the biodegradation mainly of…
Incremental oil recovery due to polymer flooding results from acceleration of oil production along flow paths and improving sweep efficiency. To achieve favorable economics, polymers should have a high viscosifying power and low adsorption. However,…
Given the ill-defined term “naphthenic acids” (NAs), we will classify NAs as the carboxylic acids found naturally in crude oil, which include both classic NAs (c-NAs, monoacids) and ox-NAs (polyacids). Resulting from the biodegradation mainly of…
Given the ill-defined term “naphthenic acids” (NAs), we will classify NAs as the carboxylic acids found naturally in crude oil, which include both classic NAs (c-NAs, monoacids) and ox-NAs (polyacids). Resulting from the biodegradation mainly of…
Amino-bonded silica phase, frequently used in adsorption chromatographic mode for petroleum analysis, was evaluated for the separation of petroleum components based on polymer liquid chromatographic modes (viz. size exclusion, critical condition, and…
There have been many attempts to achieve a clear-cut separation of alkylated aromatic compounds based on the number of aromatic rings employing normal-phase liquid chromatography. However, each method has its own limitations to address this issue.…
Characterization of heteroatom compounds in crude oils is very important in petroleum production and processing. The ultrahigh-resolution Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) is a powerful MS technique for it but…
Characterization of heteroatom compounds in crude oils is very important in petroleum production and processing. The ultrahigh-resolution Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) is a powerful MS technique for it but…
There have been many attempts to achieve a clear-cut separation of alkylated aromatic compounds based on the number of aromatic rings employing normal-phase liquid chromatography. However, each method has its own limitations to address this issue.…
Marine mammals are top predators of the marine food chain and thus known to bioaccumulate high concentrations of polyhalogenated compounds. Yet, details of the organohalogen pattern are largely unknown. For this reason, we isolated the…
In this study, a preparatory-scale fractionation method was developed. To verify the effectiveness of this method, an oil sample was fractionated into five fractions, referred to as saturate, aro1, aro2, polar1, and polar2
Scope: These test methods cover the determination of the amounts of the individual fatty acids and rosin acids in fractionated tall oil products, using capillary gas chromatographic separation of the volatile methyl esters of these acids. Four…
Scope: These test methods cover the determination of the amounts of the individual fatty acids and rosin acids in fractionated tall oil products, using capillary gas chromatographic separation of the volatile methyl esters of these acids. Four…
In this paper we isolated resins from a sample of extra heavy oil and from the products of catalytic aquathermolysis in the presence of a cobalt based catalyst and studied their structure. In fact, an oil fraction and 4 resin fractions (R1-R4) have…
Abstract: The presented review considers the currently relevant methods for studying petroleum porphyrins. For this purpose, the experimental approaches used during the investigation of the structure, concentration, and properties of metal complexes…
Primary porphyrin extracts were obtained from carbon tetrarchloride solutions of different heavy oil residuals with assistance of sulfuric acid. According to data of chromatographic separation of extracts porphyrinic fractions appear in amount of…
Bio-oil is a highly valuable product derived from biomass pyrolysis which could be used in various downstream applications upon appropriate upgrading and refining. Extraction and fractionation are two promising methods to upgrade bio-oil by…
Identification of the heteroatom (nitrogen, sulfur, and oxygen)-containing compounds of petroleum is of key importance when considering industrial and environmental issues associated with crude oil production. The more commonly performed methods of…
Metals occurring in crude oil in a great variety of complexed forms are minor but important constituents as they affect the refining and production operations, as well as participate in geochemical processes. These roles of metals are thought to be…
Asphaltenes are among the most challenging components in petroleum processing because they contain high amounts of heteroatoms (i.e., S, N, O, V, and Ni) thought to be responsible for strong aggregation tendencies, precipitation, and fouling…
Asphaltenes and resins of crude oil from the Usa oil field have been subjected to fractionation. The asphaltenes have been separated into fractions by fractional precipitation with chloroform/hexane solvent blends in the ratios of 30/70, 30/75, and…
Scope: These test methods cover the determination of the amounts of the individual fatty acids and rosin acids in fractionated tall oil products, using capillary gas chromatographic separation of the volatile methyl esters of these acids. Four…
Brassica oilseed is the second largest oilseed in the world both in terms of seed and meal production. The nutritional value and functional properties of rapeseed/canola (RSC) protein make it a suitable alternative protein in food applications.…
In this paper, a new method of resistance-examining for the results of field flow fractionation is presented, which can be used for separating resulting checking of separation technology using liquid separating carrier such as FFF, liquid…
Comprehensive two-dimensional gas chromatography coupled to time-of-flight mass spectrometry (GC. . GC/TOFMS) has shown great skill in analyzing complex mixtures such as fossil fuels, especially for compounds at low concentrations. The analysis of…
Polycyclic aromatic sulfur heterocycles (PASHs) can show very poor reactivities in catalytic hydrodesulfurization processes in refineries, especially those in high-boiling fractions and distillation residues. An insight into the structural features…
Scope: These test methods cover the determination of the amounts of the individual fatty acids and rosin acids in fractionated tall oil products, using capillary gas chromatographic separation of the volatile methyl esters of these acids. Four…
In this paper, a new method of resistance-examining for the results of field flow fractionation is presented, which can be used for separating resulting checking of separation technology using liquid separating carrier such as FFF, liquid…
In this work, preparative liquid chromatography was used for the separation of the nitrogen compounds in a sample of heavy gas oil from a Brazilian petroleum. Initially it took place a pre-fractionation by neutral aluminium oxide and the compounds…
Scope: These test methods cover the determination of the amounts of the individual fatty acids and rosin acids in fractionated tall oil products, using capillary gas chromatographic separation of the volatile methyl esters of these acids. Four…
Scope: These test methods cover the determination of the amounts of the individual fatty acids and rosin acids in fractionated tall oil products, using capillary gas chromatographic separation of the volatile methyl esters of these acids. Four…
Purpose: The aims of this research were to extract sugar-based products from oil palm biomass, oil palm fronds (OPFs) and oil palm fruit pressed fibers (FPFs) via a hydrothermal process using accelerated solvent extraction and to identify the sugar…