Abstract
The development of efficient methods for preconcentration and purification of petroleum metal porphyrins is the necessary condition for further progress of basic and especially applied research concerning the properties of these compounds and their role in oil genesis and maturation. This study deals with chromatographic preparation of high-purity vanadyl porphyrins using a sulfuric acid cation exchanger that can be readily prepared from silica gel and sulfuric acid and is simple in use. At the silica gel : sulfuric acid : water weight ratio of 60 : 15 : 25, the suggested sulfuric acid cation exchanger retains most efficiently nonporphyrin impurities of the asphaltene polar extract, whereas a significant fraction of vanadyl porphyrins (up to ~50%) passes through the chromatographic column virtually without retention with the stationary phase. In contrast to traditional adsorbents, the suggested sulfuric acid cation exchanger allows preparation of spectrally pure vanadyl porphyrins in one chromatographic purification step, thus ensuring the minimal consumption of the eluent and adsorbent. High purity of the vanadyl porphyrins obtained was confirmed by mass-spectrometric and spectroscopic methods of analysis.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
