Unlock instant, AI-driven research and patent intelligence for your innovation.

Reduced rvp oxygenated gasoline composition and method

a technology of oxygenated gasoline and composition, applied in the petroleum industry, fuels, liquid carbonaceous fuels, etc., can solve the problems of reducing octane rating, reducing rvp limits, and affecting refineries, so as to reduce rvp blending, reduce rvp, and reduce the effect of rvp

Inactive Publication Date: 2011-02-03
BUTAMAXTM ADVANCED BIOFUELS
View PDF37 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"This patent describes a method of reducing the volatile organic compounds (VOCs) in oxygenated gasolines. By adding a specific type of compound called RVP reducing compound, the patent explains how to blend gasoline with oxygenates to meet applicable VOC limits while still maintaining the desired blend composition. The use of these RVP reducing compounds can help refineries meet stricter regulations and reduce the need for waivers. The patent also provides a method for reducing the RVP constraint on gasoline blend stocks for oxygenate blending. Overall, the patent provides a solution for producing oxygenated gasolines with improved quality and reduced emissions."

Problems solved by technology

Reducing such lighter hydrocarbons can negatively impact gasoline characteristics.
For example, decreasing the amount of butane in a gasoline fuel lowers the RVP of that fuel, but it also reduces the octane rating.
By constraining the composition of gasolines, RVP limits also impose a burden upon refineries.
One consequence of such RVP constraints upon refineries is that less gasoline can be refined from each barrel of petroleum.
This can significantly impact the gasoline supply available to meet consumer demand.
Unfortunately, oxygenates have a non-linear effect upon RVP when blended into a fuel.
However, many jurisdictions prohibit or severely limit the use of MTBE and similar ethers.
Unfortunately, many of the oxygenates permitted for blending into gasolines have significant detriments including an affinity for water which causes transportation and handling difficulties, and an increase in a gasoline's RVP when blended with the oxygenate.
An affinity for water causes transport and handling difficulties.
We have found that certain compounds can exhibit unexpectedly low RVP blending values for blending with typical oxygenated gasolines.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Reduced rvp oxygenated gasoline composition and method
  • Reduced rvp oxygenated gasoline composition and method
  • Reduced rvp oxygenated gasoline composition and method

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0065]The gasoline blend stock of Comparative Example A above was blended with 5 vol % suitable oxygenate. Ethanol was used as the suitable oxygenate. The RVP of the resulting oxygenated gasoline was measured to be 9.75 psi when measured in accordance with ASTM D5191. Several potential RVP reducing compounds were blended with the oxygenated gasoline to determine whether the compounds were soluble and to determine the blend RVP value. The blend RVP value was calculated for 1 vol % and 5 vol % blends by measuring the RVP of the resulting gasolines in accordance with ASTM D5191. The results are shown in Table V below.

TABLE VRVP Blend Values (psi)Unleaded RegularGasoline with5 vol % EthanolCompound1%5%2-propanol−0.252.151-butanol−11.25−2.252-butanol−6.25−1.251,3-propanediolII2,3-butanediol−8.25IglycerolIIacetic acid−16.25−4.45I = Insoluble

[0066]Table V illustrates the unpredictable nature of blending oxygenates and RVP reducing compounds with gasoline blend stocks. 1,3-propanediol and g...

example 2

[0068]The gasoline blend stock of Comparative Example A above was blended with 10 vol % of a suitable oxygenate. Ethanol was used as the suitable oxygenate. The RVP of the resulting oxygenated gasoline was measured to be 9.75 psi when measured in accordance with ASTM D5191. Several potential RVP reducing compounds were blended with the oxygenated gasoline and the blend RVP value was calculated for 1 vol % and 5 vol % blends by measuring the RVP of the resulting mixture in accordance with ASTM D5191. The results are shown in Table VI below.

TABLE VIRVP Blend Values (psi)Unleaded RegularGasoline with10 vol % EthanolPotential RVPReducing Compound1%5%2-propanol−5.251.351-butanol−8.250.152-butanol−6.250.151,3-propanediol−9.25I2,3-butanediol−3.251.95glycerolIIacetic acid−8.25−1.25I = Insoluble

[0069]Table VI further illustrates the unpredictable nature of blending oxygenates and RVP reducing compounds with gasoline blend stocks. 1,3-propanediol was not a suitable RVP reducing compound for t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
vol %aaaaaaaaaa
vol %aaaaaaaaaa
temperatureaaaaaaaaaa
Login to View More

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.

Description

BACKGROUND OF THE INVENTION[0001]This invention relates to fuels, more particularly to oxygenated gasolines including gasolines containing ethanol. This invention provides an oxygenated gasoline having a reduced Reid vapor pressure (RVP) thereby allowing a higher proportion of low boiling components to be blended into the gasoline without exceeding RVP limits. This invention also provides a method for reducing the RVP of oxygenated gasolines.[0002]Gasolines are fuels which are suitable for use in a spark-ignition engine and which generally contain as a primary component a mixture of numerous hydrocarbons having different boiling points and typically boiling at a temperature in the range of from about 26° C. to about 225° C. under atmospheric pressure. This range is approximate and can vary depending upon the actual mixture of hydrocarbon molecules present, the additives or other compounds present (if any), and the environmental conditions. Typically, the hydrocarbon component of gas...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(United States)
IPC IPC(8): C10L1/188C10L1/18C10L1/182
CPCC10L1/023C10L1/18C10L1/1881C10L1/1824C10L1/1826C10L1/1822
Inventor WOLF, LESLIE R.
Owner BUTAMAXTM ADVANCED BIOFUELS