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Aviation gasoline compositions

A technology for aviation gasoline and mixtures, used in the petroleum industry, fuel tanks of power plants, fuel systems for specific fuels, etc., and can solve problems such as corrosion, icing, gasket swelling, etc.

Inactive Publication Date: 2021-05-07
LYONDELL CHEM TECH LP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Finally, alcohols such as ethanol and methanol are generally not allowed due to their tendency to absorb water which can lead to corrosion, swelling of gaskets and freezing in fuel lines at heights

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1: Aviation gasoline of the present disclosure was blended with the following composition: 59 vol% isooctane, 30 vol% ethyl tert-butyl ether, 10 vol% methyl tert-butyl ether, and 1 vol% methanol. Antioxidants are also added to the blend. The aviation gasoline formulation of Example 1 was analyzed according to ASTM D2699A and ASTM D2700A. The results of these tests are presented in Table 1A below:

[0036]

[0037]

[0038] Table 1A

[0039] A second analysis of Example 1 according to the ASTM test standard identified below yielded the following results, as provided in Table IB below:

[0040]

[0041]

[0042]

[0043] Table 1B

[0044] Unexpectedly, the net heat of combustion of Example 1 of 43.820 MJ / kg exceeds the 100LL specification, implying that the ethers improve combustion despite their inherently lower energy content to produce fuels that behave similarly to 100% hydrocarbon based fuels.

Embodiment 2

[0045] Example 2: Aviation gasoline of the present disclosure was blended with the following composition: 59 vol% isooctane, 30 vol% ethyl tert-butyl ether, 10 vol% methyl tert-butyl ether, and 1 vol% methanol. Tetraethyllead was added in an amount of 0.05 g / gal. Antioxidants are also added to the blend. The aviation gasoline formulation of Example 2 was analyzed according to ASTM D2699A and ASTM D2700A. The results of these tests are presented in Table 2A below:

[0046]

[0047] Table 2A

[0048] A second analysis of Example 2 according to the ASTM test standard identified below yielded the following results, as provided in Table 2B below:

[0049]

[0050]

[0051]

[0052] Table 2B

[0053] Unexpectedly, the net heat of combustion of Example 2 of 43.820 MJ / kg exceeds the 100LL specification, implying that the ethers improve combustion despite their inherently lower energy content to produce fuels that behave similarly to 100% hydrocarbon based fuels.

Embodiment 3

[0054] Example 3: Aviation gasoline of the present disclosure was blended with the following composition: 60 vol% isooctane and 40 vol% ethyl tert-butyl ether.

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PUM

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Abstract

An aviation gasoline composition having: from about 70 vol% to about 80 vol% isooctane; from about 5 vol% to about 9 vol% isopentane; from about 10 vol% to about 20 vol% of one or more dialkyl ether; and from about 1 vol% to about 5 vol% of one or more alcohol, from about 0.02. vol% to about 0.07 vol% of one or more octane enhancer such as MMT, and, optionally, one or more additives selected from the group consisting of: antioxidants, anti-icing agents, antistatic additives, corrosion inhibitors, dyes, lubricants, and mixtures thereof, wherein the aviation gasoline has a motor octane number of at least 99.6.

Description

[0001] Cross References to Related Applications [0002] This application is filed under the Patent Cooperation Treaty which claims priority to U.S. Provisional Application No. 62 / 738,406, filed September 28, 2018, and U.S. Provisional Application No. 62 / 839,389, filed April 26, 2019 Interest, both applications are hereby incorporated by reference in their entirety. technical field [0003] The present disclosure relates to aviation gasoline formulations. More specifically, the present disclosure relates to aviation gasoline formulations having a MON of at least 96.0. Background technique [0004] Aviation gasoline ("avgas") is a fuel used in spark-ignition internal combustion engines to propel aircraft. Aviation gasoline for piston engine aircraft requires a higher octane rating and a tighter Reid vapor pressure ("RVP") range than motor gasoline. Due to the wide range of piston engine technologies used by the commercial aviation fleet, the minimum octane requirement for ...

Claims

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Application Information

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IPC IPC(8): C10L1/02
CPCC10L1/023C10L1/10C10L1/1616C10L1/1608C10L1/1852C10L1/1824C10L1/305C10L1/306C10L2270/02C10L2270/04C10L10/10C10L1/30C10L1/06C10L1/18B64D37/02B64D37/30C10L2200/0222C10L2200/0236C10L2200/043
Inventor D·B·普尔雷奥D·M·小米娜兹
Owner LYONDELL CHEM TECH LP
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