Influence of the chemical structure of additives poly(ethylene‐co‐vinyl acetate)‐based on the pour point of crude oils

ABSTRACT One of the methods to prevent wax precipitation, during petroleum production, transport, and refining, is the use of polymer additives that can reduce the oil pour point. However, no single additive work for all types of crude oil and this relation is not yet well known. In this study, a fa...

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Bibliographic Details
Published in:Journal of applied polymer science 2020-09, Vol.137 (33), p.n/a
Main Authors: Oliveira, Lize M. S. L., Nunes, Rita C. P., Pessoa, Larissa M. B., Reis, Leidiane G., Spinelli, Luciana S., Lucas, Elizabete Fernandes
Format: Article
Language:English
Subjects:
Additives
Copolymers
Crude oil
Cycloalkanes
Ethylene
Hydrocarbons
Hydroxyl groups
Materials science
Molecular chains
NMR
Nuclear magnetic resonance
oil and gas
Paraffins
Polymers
Size distribution
spectroscopy
Vinyl acetate
Waxes
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Summary:ABSTRACT One of the methods to prevent wax precipitation, during petroleum production, transport, and refining, is the use of polymer additives that can reduce the oil pour point. However, no single additive work for all types of crude oil and this relation is not yet well known. In this study, a family of polymers based on poly(ethylene‐co‐vinyl acetate), containing hydroxyl groups and long pendant hydrocarbon chains (from C6 to C18), were synthesized and characterized by H1 nuclear magnetic resonance and solubility test. Four crude oil samples containing different amounts and size distribution of the wax were used. The additive's action is favored by higher contents of iso + cycloalkanes and lower contents of n‐paraffins with larger chain sizes. The presence of the CH3COO group in the copolymers promoted the lowering of the pour point, supported by a low OH concentration and the presence of a long pendant hydrocarbon chain: the best results were obtained with C10 and C12 chain lengths. © 2020 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48969.
ISSN:0021-8995
1097-4628
DOI:10.1002/app.48969