SYNTHESIS OF POLYETHYLEN GLYCOL OLEATE AS POUR POINT DEPRESSANT FOR CRUDE OIL
One of the problems in transportation of crude oil production is wax deposition in pipeline which reduces the rate of fluid flow in the piping used in the oil transport process. The prevention of wax deposition can be done by the addition of PPD (Pour Point Depressant) compounds, such as polyethylen...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/28885 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | One of the problems in transportation of crude oil production is wax deposition in pipeline which reduces the rate of fluid flow in the piping used in the oil transport process. The prevention of wax deposition can be done by the addition of PPD (Pour Point Depressant) compounds, such as polyethylene glycol oleate compounds or PEG-oleate. In this study, PEG-oleate was synthesized by reacting oleic acid and polyethylene glycol (400, 1000, and 6000) using sulfuric acid catalyst in a vacuum reflux reaction system followed by thin layer chromatography analysis (KLT) and FTIR (Fourier Transform Infra Red) spectrophotometry measuments. The percentage of the synthesized products, which are PEG400-oleate, PEG1000-oleate, and PEG6000-oleate were 93.26%; 91.31%; and 90.91%, respectively. The TLC results showed that the synthesized product showed a different spot with different Rf (retardation factor) value compared to the Rf values of its reactantds. The TLC analysis of PEG400-oleate, oleic acid, and polyethylene glycol using eluent system of n-hexane:methanol (1:3, v/v), revealed Rf values of 0.60, 0.71, and 0.43, respectively. The TLC test using chloroform:methanol (1:4, v/v) as eluents over PEG1000-oleate, oleic acid, and polyethylene glycol gave Rf values of 0.43, 0.51 and 0.29, respectively. Meanwhile, the TLC analysis of PEG6000-oleate, oleic acid and polyethylene glycol in chloroform:methanol (1:6, v/v) eluent system showed Rf values of 0.27, 0.54, and 0.21, respectively. The FTIR spectra of the three products indicated the presence of a carbonyl (C=O) vibration of ester functional group at the wavenumber of 1735–1738 cm-1 indicating the ester product has been formed. The effectiveness tests of PEG-oleate as pour point depressant (PPD) were performed on crude oil from Benar reservoir in Sumatera with variation of PEG-oleat concentration at 500, 1000, 2000, 5000, and 10000 ppm. The results of PPD properties tests of crude oil showed a linear correlation between molecular weight of polyethylene glycol and the decrease in pour point of crude oil sample from Benar reservoir. The use of 10000 ppm concentration of PEG400-oleate was capable to decrease the pour point of crude oil sample up to 6 ?C, whereas with the same concentration, the PEG1000-oleate could decrease the crude oil pour point up to 9 ?C. Unlike the two previous products, PEG6000-oleate has the capability to reduce the pour point of crude oil sample up to 9 ?C only with concentration of 5000 ppm. <br />
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