| Title | Octane improvement by etherification of light distillate olefins |
| Download | Downloads |
| Author | Farnand, B A; Lennox, R K; Tharby, R D |
| Source | Canada Centre for Mineral and Energy Technology, Energy Research Laboratories 88-69 (J), 1988, 23 pages, https://doi.org/10.4095/304410 |
| Year | 1988 |
| Publisher | Energy, Mines and Resources Canada |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf |
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| Released | 1988 01 01; 2017 08 09 |
| Abstract | C4 tO C6 rich fractions of light olefins obtained from oil refinery catalytically cracked reactor effluent were reacted with methanol to form methyl ethers in a bench-scale pilot reactor. The ethers
produced were methyl tertiary butyl ether (MTBE), tertiary amyl methyl ether (TAME) and tertiary hexyl methyl ether (THME). The yields of ethers were determined for various operating conditions of temperature, pressure, space velocity, and
methanol/active olefin molar ratios. The ethers were blended into unleaded gasoline to determine their blending octane numbers and their effect on vapour pressure. Both reactor effluent and purified ethers were used in the quality assessment tests.
The average blending octane numbers in regular unleaded gasoline of 94.2 RON and 83.8 MON were: methanol/isopropanol blends at 4% total oxygen, 124 RON and 94 MON; MTBE, 116 RON and 101 MON; TAME, 106 RON and 99 MON; and THME raw reactor effluent,
89.0 RON and 80.6 MON. The influence of these blending agents and the presence of unreacted methanol upon vapour pressure were discussed in terms of incorporating low cost butane into gasoline. |
| GEOSCAN ID | 304410 |
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