Petroleum Chemistry

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Routes for reactions of alkylene oxides with R-β-hydroxyalkyl sulfides: Unusual exchange of functional groups
Petroleum Chemistry - Tập 52 - Trang 194-203 - 2012
A. D. Malievskii
Possible routes of the previously unknown exchange reaction of alkylene oxides with R-β-hydroxyalkyl sulfides have been considered. Each route has intermediates and transition states of its own, but all the directions in the final stage lead to the formation of a single intermediate cyclic bipolar ion with intramolecular hydrogen bonding, which determines the common nature and composition of end p...... hiện toàn bộ
Thin-film cracking of acid tars
Petroleum Chemistry - Tập 52 - Trang 245-252 - 2012
A. D. Zorin, E. N. Karataev, V. F. Zanozina, A. V. Knyazev, E. V. Zhebryakov
The method of thin-film thermal cracking of acid tar to manufacture liquid fuel and coke or liquid fuel and asphaltic binders has been developed. Differential thermal analysis of acid tar samples has been performed. A model of the thin-layer thermal cracking of acid tar and an algorithm for calculating the engineering parameters of the process have been proposed.
Fabrication and Performance of Gemini Oleamidopropyl Hydroxy Sulfobetaine (GOHSB) Used as a Viscoelastic Fracturing Fluid
Petroleum Chemistry - Tập 62 Số 9 - Trang 1062-1071 - 2022
Chen Wang, Yan Hou, Xiaoguang Yang, Zhigang Li, Kang Zhang, Peizhi Li, Jiangtao Wang, Meng Li
Modeling of Fast-Permeant Component Removal from Gas Mixture in a Membrane Module with Pulsed Retentate
Petroleum Chemistry - Tập 58 - Trang 806-814 - 2018
S. V. Battalov, T. S. Sazanova, M. M. Trubyanov, E. S. Puzanov, V. M. Vorotyntsev, P. N. Drozdov, I. V. Vorotyntsev
The process of unsteady-state membrane gas separation (fast-permeant impurity removal) with a pulsed retentate flow operation was considered. A semiempirical mathematical algorithm was developed to describe this process taking into account its kinetic characteristics (total cycle time, stripping time and withdrawal time, withdrawal velocity) using the MathCad® software package. Based on the develo...... hiện toàn bộ
Synthesis of N-methylaniline over molecular sieve catalysts
Petroleum Chemistry - Tập 56 - Trang 205-210 - 2016
M. V. Belova, O. A. Ponomareva, I. I. Ivanova
The preparation of N-methylaniline in two various processes: alkylation of aniline with methanol and hydroalkylation of nitrobenzene with methanol has been studied. Bifunctional molecular sieves containing metal copper as the hydrogenating component and zeolites BEA, MOR, MFI, FAU (Y) and mesoporous material MCM-41 as an alkylating component were used as catalysts. It has been shown that the modif...... hiện toàn bộ
Catalytic chemistry of dimethyl ether (review)
Petroleum Chemistry - Tập 57 - Trang 353-373 - 2017
E. A. Volnina, M. A. Kipnis, S. N. Khadzhiev
Heterogeneous catalytic reactions of dimethyl ether (DME) with various compounds (alkenes, aromatic compounds, CO, etc.) are surveyed. Analysis of published data allows the conclusion that the formation of products generally involves surface intermediates produced by the interaction of DME with Brønsted acid sites. There is no formation of water in this case, suggesting that DME can be preferred t...... hiện toàn bộ
tert-Butyl Ethers of Renewable Diols as Oxygenated Additives for Motor Gasoline. Part I: Glycerol and Propylene Glycol Ethers
Petroleum Chemistry - Tập 63 - Trang 428-436 - 2023
V. O. Samoilov, T. I. Stolonogova, D. N. Ramazanov, E. V. Tyurina, V. A. Lavrent’ev, Yu. I. Porukova, E. A. Chernysheva, V. M. Kapustin
The study investigates tert-butoxy alkanols (otherwise defined as polyol tert-butyl ethers) that have vicinal tert-butoxy and hydroxy groups in their molecules from the perspective of their usability as oxygenated additives for motor gasoline. A series of propylene glycol mono-tert-butyl ether (PTBE) and glycerol di-tert-butyl ether (di-GTBE) samples were prepared: PTBE by direct acid-catalytic al...... hiện toàn bộ
Modern Methods for Producing Acetic Acid from Methane: New Trends (A Review)
Petroleum Chemistry - Tập 62 - Trang 40-61 - 2022
N. N. Ezhova, N. V. Kolesnichenko, A. L. Maximov
Recent achievements in the development of new methods for producing acetic acid (AA) from methane using heterogeneous catalysts are summarized and systematized. Modern heterogeneous-catalytic processes of methane conversion to AA via syngas and alternative one- and two-step AA production procedures via “low-temperature” oxidative methane conversion (via oxidative coupling, oxyhalogenation, oxidati...... hiện toàn bộ
Influence of Demulsifier Aging on Its Performance in Heavy Oil Synthetic Emulsions
Petroleum Chemistry - - Trang 1-6 - 2023
Rita de Cassia P. Nunes, Carla Michele F. Silva, Paulo Cristiano S. Rocha, Elizabete F. Lucas
Flow assurance is one of the main challenges in the oil industry. Many factors can affect the oil fluidity, including the oil °API and the formation of water-in-oil (w/o) emulsions that increase the fluid viscosity. The demulsification process aims to decrease as much as possible the water content in the crude oil. Chemical products known as demulsifiers can be used to aid in this process. In labo...... hiện toàn bộ
Small-angle scattering study of colloidal particles in heavy crude oils
Petroleum Chemistry - Tập 51 - Trang 281-285 - 2011
F. V. Tuzikov, Yu. V. Larichev, L. S. Borisova, I. V. Kozhevnikov, O. N. Mart’yanov
The structural and dispersion characteristics of samples of heavy crude oils and fractions isolated from them have been studied. A method of in situ analysis of the aggregation of asphaltenes directly in crude oils on the basis of small-angle X-ray scattering is proposed. It has been shown that the maximum size of scattering particles in all crude oil samples is limited to the value on the order o...... hiện toàn bộ
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