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Unleaded gasoline compositions

a technology of unleaded gasoline and compositions, which is applied in the direction of fuels, thickeners, organic chemistry, etc., can solve the problems of reducing the olefin content of gasoline, imposing limits on the permissible sulfur level of gasoline, and gasoline that does not meet the specifications

Inactive Publication Date: 2003-09-18
IRVING OIL
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  • Abstract
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AI Technical Summary

Problems solved by technology

Gasolines that do not meet the specifications are believed to be inferior with regard to the emissions, which result from their use in vehicles.
Nevertheless, the requirements of the U.S. Clean Air Act and property restrictions imposed by RFG and the EPA Complex Model, impose limits on the permissible sulfur levels in gasoline.
Unfortunately, desulfurization causes a reduction in olefin content and consequently a reduction in octane value.
Depending on the conditions of the hydrotreating operation, however, some of the hydrogen used for desulfurization can also cause some hydrocracking in addition to olefin saturation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

Gasoline Formulations

[0049] Several gasoline fuels were prepared by blending gasoline feedstock selected from one or more of alkylate, desulfirized catalytically cracked gasoline, dehexanizer bottoms, dehexanizer overheads, heavy straight run gasoline, light straight run gasoline, an aromatic saturated gasoline stream, hydrocracker topper light naphtha and butane. The catalytically cracked gasoline feedstock was desulfurized using technology licensed from Catalytic Distillation Technologies under one or more of U.S. Pat. Nos. 5,510,568; 5,595,634; 5,597,476 and 5,807,477 and Canadian published application 2,178,612. MTBE in an amount of about 12% by volume also was blended into the gasoline fuel. The blended gasoline fuels were all found to be in compliance with EPA regulations.

[0050] The blended gasoline fuels exhibited the following properties:

1TABLE 1 GASOLINE PROPERTIES Blend RVP T10 T50 T90 Sulfur Olefin Aromatic Octane Identity (psi) (.degree. F.) (.degree. F.) (.degree. F.) (...

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Abstract

An unleaded gasoline fuel of about 87 octane suitable for use in automobile spark-ignition (internal combustion) engines, the gasoline having a low sulfur content (below 100 ppmw) and a relatively high olefin content (between 15 and 25 vol. %). Gasoline fuels meeting these requirements generally have emissions characteristics satisfying the requirements of RFG under EPA regulations.

Description

[0001] The present invention relates to fuels, particularly unleaded gasoline fuels for use in automobile spark-ignition (internal combustion) engines, to a method for making the fuels and to related combustion methods. The gasoline fuels of the present invention, when used to power automobile internal combustion engines, generally exhibit atmospheric emissions of carbon monoxide (CO), oxides of nitrogen (NOx) and hydrocarbons (HC) sufficiently low to satisfy the requirements of Reformulated Gasoline (RFG) under Environmental Protection Agency (EPA) regulations. The present invention is specifically directed to a clean burning gasoline fuel of about an 87 octane and having a low sulfur content and a relatively high olefin content. For the most part, gasoline fuels of this invention have been shown to meet or exceed emission requirements of RFG under the EPA regulations.BACKGROUND OF THE MENTION[0002] In an attempt to reduce pollution from the combustion of gasoline fuels, federal an...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C10L1/02C10L1/06
CPCC10L1/06C10L1/023
Inventor BLACKWOOD, DAVID MACDONALDFLEMMING, KENNETH E.WILKIE, MICHAEL A.NUGENT, JOHN
Owner IRVING OIL
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