Study of the naphthenic acids recovery from petroleum using an ionic material as stationary phase in the solid phase extraction (SPE) process

Naphthenic acids cause corrosion in the equipment used in the petroleum processing. Considering difficulties in the identification of these compounds present in the petroleum sample is necessary to study new methodologies to identify the acid compounds. Solid phase extraction (SPE) with ionic phases has been widely used for this purpose, because it promotes greater selectivity, lower consumption of solvents and small amount of the stationary phase. The proposed study is the acid compounds recovery using SPE method. A new stationary phase was synthesised and called pyridiniunpropylsilica ( SiPy ). Linear and monocycles acids were used as model system in the SPE for calculation of recovery. The synthesized mesoporous materials, SiPy , showed adequate characteristics to be used as stationary phase in SPE for acidic compounds recovery from a petroleum resins fraction. It was observed that the percentage of cyclic acids recovery using the SiPy was better than the results found in the literature. This result is promising because the recovery of cyclic acid, main short chain and high polarity, from complex matrixes is a challenge to the analytical chemistry. The SiPy showed a percentage of recovery of the acid compounds per unit area of the stationary phase greater than commercial stationary phases. The SPE process using SiPy as stationary phase to recovery cyclic and acyclic acid compounds showed satisfactory results for the recovery, characterization, and quanti?cation of the acidic compounds presented in the model system as well as in the resin fraction from petroleum.

[1]  José R. Gregório,et al.  Ionic silica based hybrid material containing the pyridinium group used as an adsorbent for textile dye. , 2012, Journal of colloid and interface science.

[2]  E. Benvenutti,et al.  Solid phase extraction of petroleum carboxylic acids using a functionalized alumina as stationary phase. , 2012, Journal of separation science.

[3]  N. Nielsen,et al.  Quantitative Analysis of Constituents in Heavy Fuel Oil by 1H Nuclear Magnetic Resonance (NMR) Spectroscopy and Multivariate Data Analysis , 2008 .

[4]  A. Marshall,et al.  Sulfur Speciation in Petroleum: Atmospheric Pressure Photoionization or Chemical Derivatization and Electrospray Ionization Fourier Transform Ion Cyclotron Resonance Mass Spectrometry , 2007 .

[5]  T. Barth,et al.  Fractionation of Crude Oil Acids by HPLC and Characterization of Their Properties and Effects on Gas Hydrate Surfaces , 2007 .

[6]  E. Caramão,et al.  Analysis of tert-butyldimethylsilyl derivatives in heavy gas oil from Brazilian naphthenic acids by gas chromatography coupled to mass spectrometry with electron impact ionization. , 2006, Journal of chromatography. A.

[7]  P. Fedorak,et al.  A review of the occurrence, analyses, toxicity, and biodegradation of naphthenic acids. , 2005, Chemosphere.

[8]  P. Fedorak,et al.  Evaluation of the analyses of tert-butyldimethylsilyl derivatives of naphthenic acids by gas chromatography-electron impact mass spectrometry. , 2004, Journal of chromatography. A.

[9]  E. Benvenutti,et al.  FTIR Thermal Analysis on Anilinepropylsilica Xerogel , 2002 .

[10]  J. Watson,et al.  Determination of naphthenic acids in crude oils using nonaqueous ion exchange solid-phase extraction. , 2001, Analytical chemistry.

[11]  E. Benvenutti,et al.  Infrared and thermogravimetric study of high pressure consolidation in alkoxide silica gel powders , 1997 .

[12]  Y. Gushikem,et al.  Antimonio (V) disperso na superficie de silica gel : sintese, caracterização e propriedades , 1992 .

[13]  J. Ying,et al.  Energetics and structure of sol-gel silicas , 1990 .

[14]  E. Barrett,et al.  The Determination of Pore Volume and Area Distributions in Porous Substances. II. Comparison between Nitrogen Isotherm and Mercury Porosimeter Methods , 1951 .

[15]  E. Teller,et al.  ADSORPTION OF GASES IN MULTIMOLECULAR LAYERS , 1938 .

[16]  H. P. Oliveira,et al.  Síntese, caracterização e propriedades do sistema AIO(OH)W'O IND.2' , 2009 .

[17]  W. Ke,et al.  Erosion-corrosion of various oil-refining materials in naphthenic acid , 2004 .

[18]  E. Barrett,et al.  (CONTRIBUTION FROM THE MULTIPLE FELLOWSHIP OF BAUGH AND SONS COMPANY, MELLOX INSTITUTE) The Determination of Pore Volume and Area Distributions in Porous Substances. I. Computations from Nitrogen Isotherms , 1951 .