41 results about "Reid vapor pressure" patented technology

Mixed alcohols can be used as a fuel additive in gasoline, diesel, jet fuel or as a neat fuel in and of itself. The mixed alcohols can contain C₁-C₅ alcohols, or in the alternative, C₁-C₈, or higher, alcohols in order to boost energy content. The C₁-C₅ mixed alcohols contain more ethanol than methanol with amounts of propanol, butanol and pentanol. C₁-C₈ mixed alcohols contain the same, with amounts of hexanol, heptanol and octanol. A gasoline-based fuel includes gasoline and the mixed alcohols. A diesel based fuel includes diesel and the mixed alcohols. A jet fuel includes kerosene and the mixed alcohols. The neat fuel of the mixed alcohols has an octane number of at least 109 and the Reid Vapor Pressure is no greater than 5 psi. The gross heat of combustion is at least 12,000 BTU's/lb.

The present invention relates to a split stream oilfield pumping system which utilizes recycled high Reid vapor pressure production fluids. The oilfield system is made up of two separate fluid streams: a first recycled fluid stream and a second new fluid stream. The recycled fluid stream is enclosed to reduce or eliminate vaporization of the recycled fluid, which typically will have a Reid vapor pressure >14 kPa. Wellbore treatment additives are added to the new fluid stream, and the resultant treatment fluid is mixed with the recycled fluid in a common manifold to provide a final wellbore treatment fluid to be delivered to the wellhead.

Provided is a novel gasoline composition which is substantially free of ether compounds and is in compliance with a California Predictive Model. The gasoline composition is suitable for use in the winter months, i.e., having a Reid vapor pressure in the range of greater than 7.0 to about 15.0 psi. The method for blending the gasoline comprises blending streams from a refinery in a controlled manner to maintain compliance with the California Predictive Model.

The power required to recover C₃₊ hydrocarbons from crude carbon dioxide comprising C₁₊ hydrocarbons and hydrogen sulfide may be reduced by distilling the crude carbon dioxide to produce carbon dioxide-enriched overhead vapor and C₃₊ hydrocarbon-enriched bottoms liquid such that the hydrogen sulfide is rejected with the overhead vapor. Power consumption reductions may be achieved by incorporating a heat pump cycle using carbon dioxide vapor as working fluid to provide at least a part of the refrigeration duty and using a side reboiler to reduce the bottom reboiler duty. Where the bottoms liquid is further processed to produce “lighter” and “heavier” hydrocarbon fractions, the process enables optimization of upgrading crude oil on the basis of API gravity, Reid Vapor pressure and/or viscosity.

The present invention provides a fuel for homogeneous charge compression ignition engines, which can achieve a stable homogeneous charge compression ignition at a higher output. The fuel satisfies the following requirements (1), (2), (3), and (4):

• (1) distillation characteristics:
  • initial boiling point (IBP): 0° C. or higher and 60° C. or lower;
  • 30 volume percent distillation temperature (T30): 70° C. or higher and 130° C. or lower;
  • 50 volume percent distillation temperature (T50): 95° C. or higher and 200° C. or lower;
  • 70 volume percent distillation temperature (T70): 100° C. or higher and 280° C. or lower;
  • 90 volume percent distillation temperature (T90): 150° C. or higher and 330° C. or lower;
  • 95 volume percent distillation temperature (T95): 230° C. or higher and 360° C. or lower; and
  • end point (EP): 250° C. or higher and 380° C. or lower;
• (2) research octane number: 62 or greater and 85 or less
• (3) density at 15° C.: 0.700 g/cm³ or higher and lower than 0.800 g/cm³; and
• (4) Reid vapor pressure at 37.8° C.: 30 kPa or greater and lower than 65 kPa.

The invention discloses high-proportion methanol gasoline for a vehicle. The methanol gasoline comprises the following components in percentage by weight: 74 to 88.5 percent of methanol, 5 to 10 percent of low-carbon oxygen-containing component oil, 1 to 3 percent of mixed C5, 2 to 6 percent of mixed ether, 2 to 3 percent of C4 hydrocarbon, 1 to 2 percent of mixed alcohol and 0.5 to 2 percent of liquefied petroleum gas, wherein the low-carbon oxygen-containing component oil consists of 70 percent of dimethoxymethane and 30 percent of gasoline hydrocarbon with final boiling point less than 200DEG C; the mixed C5 consists of 80 percent of C5 alkane and 20 percent of C5 alkene; the C4 hydrocarbon is butane; and the mixed alcohol consists of ethanol, n-propanol and iso-propanol in the weight ratio of 4 to 3 to 3. In the preparation method, the high-proportion methanol gasoline product with reid vapor pressure (RVP) value ranging from 82 to 101kpa is prepared at the temperature of between-30 and 15 DEG C; and the method comprises the following steps of: uniformly mixing the components in weight percentage in the claim 1; and filling a preparation tank with the C4 hydrocarbon and the liquefied petroleum gas by using a dispenser to prepare the methanol gasoline. The methanol gasoline and the method have the advantages of making full use of the excess methanol resource, saving the petroleum resource, improving the cold start performance and solving the problem that high-proportion methanol gasoline can not be used in cold area.

A gasoline Reid vapor pressure (RVP) detection system includes a fuel pump and a motor operating the fuel pump in a forward direction of rotation to feed a gasoline fuel to a vehicle engine. A control device is in communication with the motor selectively directing change from the forward direction of rotation to a reverse direction of rotation opposite to the forward direction of rotation. A pressure reduction device receives flow of the fuel during operation in the reverse direction of rotation and reduces a pressure of the fuel until fuel vaporization occurs. A pump speed at which vaporization of the fuel occurs at the pressure reduction device when a motor speed and a motor current change non-linearly is correlated to a fuel RVP.

The present invention relates generally to gelled fuels and solvents. Specifically the invention relates to gel thickeners that reduce vapor pressure in fuels and solvents and are shear thinning (pseudoplastic or thixotropic) or are shear thickening and remain pourable and flowable. Still more specifically, the invention relates to nonaqueous gels made with diblock copolymers that reduce the Reid Vapor Pressure of gelled gasoline and lower the total volatility of gelled hydrocarbon solvents. These gels may contain secondary amino acid or triblock polymer gelling agents. The invention includes gel compositions and methods of making gels.

Provided is a novel high octane summer gasoline composition which is substantially free of oxygenates, and is in compliance with the California Predictive Model. The gasoline composition is suitable for use in the summer, i.e., having a Reid vapor pressure of 7.0 or less. The method for blending the gasoline comprises blending streams from a refinery in a controlled manner to maintain compliance with the California Predictive Model.

The present invention is directed to an analyzer for measuring the vapor pressure of a hydrocarbon liquid. The analyzer includes a pressure measuring system connected to an air saturation system having a circulation chamber with opposing first and second ends. A first opening is disposed toward the first end and a second opening is disposed toward the second end. A plumbing system connects the first and second openings. A pump moves the hydrocarbon liquid through the plumbing system from the first opening to the second opening so as to saturate the hydrocarbon liquid with air. The air saturation system has a cooler for cooling the hydrocarbon liquid and the pressure measuring system has a heater for heating the hydrocarbon liquid. The pump may be a piston actuated pump or a motor-driven pump and the plumbing system may include an aeration chamber.

Systems and methods for operating a fuel system that includes two separate fuel tanks are disclosed. In one example, fuel may be purged from a fuel rail in response to Reid vapor pressure of a fuel so that engine starting may be improved. A fuel with a higher Reid vapor pressure may be pumped into the fuel rail when the engine is expected to be cold started.

Provided is a novel summer gasoline composition which is substantially free of ethers, contains less than 20 ppm sulfur, and is in compliance with the California Predictive Model. The gasoline composition is suitable for use in the summer, i.e., having a Reid vapor pressure of 7.2, and more preferably 7.0 or less, but also offers the advantages of low-emissions while being substantially free of ethers. The method for blending the gasoline comprises blending streams from a refinery in a controlled manner to maintain compliance with the California Predictive Model.

The invention provides a Reid vapor pressure estimation method and device, electronic equipment and a storage medium. The Reid vapor pressure estimation method comprises the steps that saturated vapor pressure of components is determined; and determining a Reid vapor pressure of the component based on the saturated vapor pressure and a Reid vapor pressure estimation model, where the Reid vapor pressure estimation model is determined based on sample data, the sample data including a sample saturated vapor pressure and a sample Reid vapor pressure.

The method of adding to gasoline which has been stored in a container, of relatively small size for a substantial period of time to cause substantial loss of the more volatile gasoline components, an additive composition which comprises a flammable organic liquid having a Reid vapor pressure of 2 to 18 psig, to improve starting capacity of a motor fueled by said gasoline.