scholarly journals Study the rheological properties of waxy oil with modified pour point depressants for the South Turgai oil field in Kazakhstan

2019 ◽  
Vol 74 ◽  
pp. 28 ◽  
Author(s):  
S.S. Kozhabekov ◽  
A.A. Zhubanov ◽  
Zh. Toktarbay
Keyword(s):  
Crude Oil ◽  
Vinyl Acetate ◽  
Pour Point ◽  
Oil Field ◽  
Ftir Analysis ◽  
The South ◽  
Waxy Oil ◽  
Pour Point Depressants ◽  
Poly Ethylene ◽  
Eva Copolymer

This work describes the performance of poly(ethylene-co-vinyl acetate) (EVA) copolymer and modified poly(ethylene-co-vinyl acetate) (EVA-M) as pour point reducer. Commercially available EVA copolymer modified with sodium hydroxide in methanol. Partially hydrolyzed EVA was obtained and Fourier Transform InfraRed (FTIR) analysis of the modified EVA was recorded. The modified and unmodified EVA was used to crude oil of South Turgai, Kazakhstan, in order to improve the flowability of the crude oil. According to the rheological behavior of oils in the South Turgai, the findings showed that modified EVA lowered the dynamic viscosity greater compared to unmodified EVA and heat treatment. Dynamic viscosities and yield points of different oils with various temperatures with using EVA and EVA-M were studied systematically. Finally microphotograph of crystal structures two oils with using EVA and EVA-M, under same conditions, were compared and discussed.

scholarly journals Ethylene-Vinyl Acetate Copolymer/Crude Gossypol Compositions as Pour Point Depressants for Waxy Oil

2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
Bekaidar T. Marenov ◽  
Kazim S. Nadirov ◽  
Manap K. Zhantasov ◽  
Rashid K. Nadirov
Keyword(s):  
Crude Oil ◽  
Vinyl Acetate ◽  
Pour Point ◽  
Ethylene Vinyl Acetate ◽  
Oil Field ◽  
Wax Deposition ◽  
Chemical Additives ◽  
Polar Groups ◽  
Pour Point Depressants ◽  
Acetate Copolymer

Wax deposition from crude oil that blocks the pipeline and increases the viscosity of the fluid is considered as a serious challenge for petroleum transportation. Employment of chemical additives, the so-called pour point depressants (PPDs), is widely used to solve this problem. Among them are the ethylene-vinyl acetate (EVA) copolymers (EVAc), containing a polyethylene segment along the backbone with vinyl acetate. To improve the performance of EVAc as PPD, the compositions of this polymer with crude gossypol (CG), isolated from the refined cottonseed oil soapstock, were prepared by joint milling in a ball mill. Prepared compositions were characterized by Fourier transform infrared (FTIR), ultraviolet (UV), and nuclear magnetic resonance (NMR) spectroscopy. The pour point and viscosity of the crude oil from the Akshabulak oil field (Kazakhstan) were studied. The compositions with 10, 20, and 25 wt% of CG demonstrate better efficiency as PPD for crude oil than EVAc at the dosage of PPD of 50, 100, 250, and 500 ppm. The improved properties of the obtained PPD in comparison with the commercial EVAc is explained by the appearance of additional nonpolar and polar groups caused by the formation of the EVAc/CG composition.

Effect of Polyethylene-Vinyl Acetate Pour Point Depressants on the Flow Behavior of Degassed Changqing Waxy Crude Oil before/after scCO2 Extraction

2019 ◽  
Vol 33 (6) ◽  
pp. 4931-4938 ◽  
Author(s):  
Shuang Yang ◽  
Chuanxian Li ◽  
Fei Yang ◽  
Xiaoteng Li ◽  
Guangyu Sun ◽  
...  
Keyword(s):  
Crude Oil ◽  
Vinyl Acetate ◽  
Pour Point ◽  
Flow Behavior ◽  
Waxy Crude Oil ◽  
Waxy Crude ◽  
Pour Point Depressants

Research on Performance of the Monomers about Acrylic Pour Point Depressant

2012 ◽  
Vol 518-523 ◽  
pp. 884-887 ◽  
Author(s):  
Jing Chang Wang ◽  
Jian Tao Zhao ◽  
Zhong Hua Du ◽  
Chun Ming Liu ◽  
Xu Dong
Keyword(s):  
Maleic Anhydride ◽  
Crude Oil ◽  
Vinyl Acetate ◽  
Functional Groups ◽  
Pour Point ◽  
Pour Point Depressant ◽  
Point Depressant ◽  
Pour Point Depressants

Kinds of pour point depressants were prepared from common monomers, octadecyl acrylate, maleic anhydride, styrene, acrylamide and vinyl acetate. Because the monomers have various functional groups, the performance of the polymers that were prepared from different monomers showed different. The performance of the pour point depressants on solubility in diesel and the drop of pour point on Daqing crude oil was studied. The results showed that styrene and vinyl acetate could increase the solubility of the pour point depressants; maleic anhydride and acrylamide could improve the drop of crude oil pour point; tercopolymer pour point depressants are more effective on the flow of crude oil than dimeric polymers, the highest drop of pour point was 14°C. Meanwhile, compostional pour point depressants are the best of them.

Effect of Pour Point Depressants on the Impedance Spectroscopy of Waxy Crude Oil

2020 ◽  
Vol 35 (1) ◽  
pp. 433-443
Author(s):  
Hongying Li ◽  
Chaohui Chen ◽  
Qian Huang ◽  
Yifei Ding ◽  
Yu Zhuang ◽  
...  
Keyword(s):  
Impedance Spectroscopy ◽  
Crude Oil ◽  
Pour Point ◽  
Waxy Crude Oil ◽  
Waxy Crude ◽  
Pour Point Depressants

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

2020 ◽  
Vol 137 (33) ◽  
pp. 48969
Author(s):  
Lize M. S. L. Oliveira ◽  
Rita C. P. Nunes ◽  
Larissa M. B. Pessoa ◽  
Leidiane G. Reis ◽  
Luciana S. Spinelli ◽  
...  
Keyword(s):  
Vinyl Acetate ◽  
Pour Point ◽  
Chemical Structure ◽  
Crude Oils ◽  
Poly Ethylene
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