Reduced RVP Oxygenated Gasoline Composition and Method
AssigneeButamax Advanced Biofuels LLC
InventorLESLIE R WOLF
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Abstract
Compositions of oxygenated gasolines are disclosed that have reduced vapor pressure compared to those containing a single oxygenate and no RVP reducing compound. Such compositions can be formed at a refinery or at a terminal. Methods of reducing vapor pressure of an oxygenated gasoline are disclosed and methods of reducing vapor pressure constraints upon a refinery in the production of oxygenated gasoline are disclosed. Fundamental properties of RVP reducing compounds are disclosed including IR spectrum analysis. Processes and methods for blending and distributing these fuels are also disclosed.
Claims24
A gasoline composition comprising:
- a gasoline blend stock;
- an oxygenate selected from the group consisting of alcohols, ketones, esters, aldehydes, carboxylic acids, ethers, ether alcohols, and poly alcohols present at from about one percent (1%) to about ten percent (10%) by volume to form a gasoline-oxygenate blend;
- and
- isobutanol produced from biomass present at from about one percent (1%) to about five percent (5%) by volume to form a gasoline-oxygenate-isobutanol blend, wherein the difference between the infrared absorbance spectrum of the gasoline-oxygenate blend and the infrared absorbance spectrum of the gasoline-oxygenate-isobutanol blend falls within a ratio corresponding to a predetermined Reid Vapor Pressure (RVP) value limit.
A method of reducing the RVP of a gasoline blend stock in the production of oxygenated gasolines having a predetermined maximum RVP limit comprising:
- providing a gasoline blend stock;
- adding at least about one percent (1%) to about ten percent (10%) by volume of one oxygenate selected from the group consisting of alcohols, ketones, esters, aldehydes, carboxylic acids, ethers, ether alcohols and poly alcohols to form a gasoline-oxygenate blend;
- measuring the infrared absorbance spectrum of the gasoline-oxygenate blend;
- reducing the RVP of the gasoline-oxygenate blend by adding isobutanol to form a gasoline-oxygenate-isobutanol blend;
- measuring the infrared absorbance spectrum of the gasoline-oxygenate-isobutanol blend;
- and
- repeating the reducing and the measuring the infrared absorbance spectrum of the gasoline-oxygenate-isobutanol blend until a difference spectrum for the gasoline-oxygenate-isobutanol blend falls within a ratio corresponding to a predetermined RVP limit.
A method of reducing Reid Vapor Pressure (RVP) constraint on a gasoline blend stock for production of oxygenated gasolines with a predetermined maximum RVP limit comprising:
- providing a gasoline blend stock;
- reducing the gasoline blend stock's RVP by adding isobutanol to the gasoline blend stock to form a gasoline-isobutanol blend;
- measuring the gasoline-isobutanol blend's infrared absorbance spectrum;
- adding an oxygenate selected from the group consisting of alcohols, ketones, esters, aldehydes, carboxylic acids, ethers, ether alcohols, and poly alcohols to form a gasoline-isobutanol-oxygenate blend;
- measuring the gasoline-isobutanol-oxygenate blend's infrared absorbance spectrum;
- and
- repeating the adding and the measuring the infrared absorbance spectrum of the gasoline-isobutanol-oxygenate blend until a difference between the infrared absorbance spectrum for the gasoline-isobutanol blend and the infrared absorbance spectrum for the gasoline-isobutanol-oxygenate blend falls within a ratio corresponding to a predetermined RVP limit.
A method of blending oxygenated gasoline to meet a predetermined Reid Vapor Pressure (RVP) limit comprising:
- providing a gasoline blend stock;
- measuring an infrared absorbance spectrum of the gasoline stock;
- adding a pre-blend of isobutanol and at least one oxygenate selected from the group consisting of alcohols, ketones, esters, aldehydes, carboxylic acids, ethers, ether alcohols, and poly alcohols to form a gasoline-isobutanol-oxygenate blend;
- measuring an infrared absorbance spectrum of the gasoline-isobutanol-oxygenate blend;
- and
- repeating the adding and the measuring an infrared absorbance spectrum of the gasoline-isobutanol-oxygenate blend until a difference between the infrared absorbance spectrum of the gasoline-isobutanol-oxygenate blend and the infrared absorbance spectrum of the gasoline blend stock falls within a ratio corresponding to a predetermined RVP limit.
A gasoline composition comprising:
- (a) a gasoline blend stock;
- (b) ethanol present at from about one percent (1%) to about ten percent (10%) by volume to form a gasoline-oxygenate blend;
- and
- (c) isobutanol produced from biomass present at from about one percent (1%) to about five percent (5%) by volume to form a gasoline-oxygenate-isobutanol blend, wherein the difference between the infrared absorbance spectrum of the gasoline-oxygenate blend and the infrared absorbance spectrum of the gasoline-oxygenate-isobutanol blend falls within a ratio corresponding to a predetermined RVP value limit.
A gasoline composition comprising:
- an oxygenate gasoline blend in which the oxygenate comprises from about one percent (1%) to about ten percent (10%) by volume in the oxygenate gasoline blend;
- and
- isobutanol that is produced from biomass and exhibits a synergistic Reid Vapor Pressure (RVP) reduction associated with an normalized absorbance in band areas from three-thousand six-hundred eighty reciprocal centimeters (3680 cm−1) to three-thousand one-hundred reciprocal centimeters (3100 cm−1) in a blend with the oxygenate gasoline in comparison to the gasoline included in the oxygenate gasoline blend.
Dependencies are inferred from the claim text.