tert-Amyl methyl ether (TAME)
Ether,methyl tert-pentyl

EINECS NO. 213-611-4, CAS: 994-05-8

To meet gasoline anti-knock properties, high environmental requirements and produce green gasoline, Octane Oxygenate blending process is used, which aims at the so-called "aromatic substitution" effect. Methyl tertiary butyl ether (MTBE) and Tertiary amyl methyl ether (TAME) are main oxygenates compounds used in gasoline to achieve high octane numbers.
Oxygenates are environmentally-friendly and low toxicity octane-enhancers. They contain oxygen, which can not provide energy, but their structure provides a reasonable antiknock value, thus they are good substitutes for aromatics, and they may also reduce the smog-forming tendencies of the exhaust gases. Most oxygenates used in gasolines are either alcohols ( Cx-O-H ) or ethers (Cx-O-Cy), and contain 1 to 6 carbons. To mention some of the blending components for gasoline: polygasoline, dimate, alkylate, tertiary butyl alcohol (TBA), Methyl tertiary butyl ether (MTBE), ethyl tertiary butyl ether (ETBE), Tertiary amyl methyl ether (TAME) and tertiary amyl ethyl ether (TAEE).
TAME is considered to become a better alternative to a now debated MTBE and will replace it as a preferred oxygenate blending component for green gasoline. MTBE and TAME are both made out from the light olefins: respectively from isobutylene and isoamylenes (isopentenes).
TAME 300 KMt/year production unit uses high purity isopentane (min. purity 98%) in its production process. This insures TAME's high quality and gasoline performance characteristics.
Compared to MTBE, TAME outperformes its peer with the low value of saturated vapor pressure and higher energy contents, which brings it an added value to reformulated gasolines production. TAME features a high Octane Number, measuring about 112 expressed as RON (Research Octane Number, indicative of normal road performance) and 100 expressed as MON (Motor Octane Number, indicative of high speed performance, a more severe set of conditions).
"Compounded" or "reformulated" gasolines are recomended to blend TAME in at a typical 15% by volume.

Comparative characteristics of the three most popular automotor gasoline octane enhancers.

Specification MTBE ETBE TAME Notes
RON 117 119 112
MON 103 105 98
Ether content in gasoline, % volume. 11,0 12,7 12,7 provides with 2% of bound О2 in gasoline
15,1 17,2 17,2 provides with 2,7% of bound О2 in gasoline
Boiling Temperature, °С 55 73 86
Density at 20 °С, kg/m3 740 770 765
Water solubility %, 20 °С 4,8 0,1 0,2
Saturated vapors pressure, kPA 41,4-61,2 21,7-34,5 6,9-13,8 Euro 3-5 gasolines regulation (not exceeding 40-50 during summer period)
lower heating value (LHV), kJ/l (kcal/l) 26020(6215) 26750(6385) 27900(6659)

Complete Technical Datasheet: TDS
Spectrometry: GLC report
SGS quality report and certificate of analysis.
REACH pre-registration, letter of Access [ref. 71120117/C02142] .
TAME has been approved by TNK-BP and Rosneft for industrial use.

TAME comparative performance test results
produced at TNK-BP research center

Specification Gasoline reference sample Addition +10% TAME Addition +10% MTBE Addition +15% TAME Addition +15% MTBE
1 RON 89,2 91,6 92,4 92,7 93,6
1.1 RON spread between the samples 0,8 0,9
1.2 RON value encrease - 2,4 3,2 3,5 4,4
1.3 TAME blending RON 113,2 112,5
2 Saturated vapors pressure, kPA 59,8 69,5

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product information page generated on: Tue Jun 5 19:55:30 CEST 2012