Intevep, S.a.

Intevep

Inievep, S.a.

Hercilio Rivas

Xiomara Gutierrez

Gustavo A Nunez

Gerardo Alonso Sanchez

Ignacio A Layrisse

Maria Luisa Chirinos

Manuel Chirinos

Domingo R Polanco

Migdalia Carrasquero

Mayela Rivero

Tulio Rafael Colmenares

Antonio E Cardenas

Socrates Acevedo

Jose P Salazar

Roberto E Galiasso

Domingo P Rodriguez

Felix Abraham Silva

Maria Luisa Ventresca

Geoffrey McGrath

Lirio Quintero

Euler G Jimenez

Euler Jimenez G

Humberto Marquez

Ignacio A Layrisse R

Daysi Rojas

Jose Salazar P

Emilio Guevara

Luis R Marcano

Clara E Mata

Carolina Blanco

Gustavo A Núnez

Xiomara Gutiérrez

Manuel A González

Francisco Lopez-Linares

Dolores Pazos

Amanda Morles

Francisco López-Linares

Gerardo Alonso Sánchez

Pedro Blanco

G Euler Jimenez

Lirio Q De Paz

Luis Marcano

A surfactant package for a water-in-hydrocarbon emulsion includes a fatty acid component; a fatty acid salt component; an alcohol component and a salt of carboxylic acid. Emulsions formed using this surfactant package are stable and have ratios of water to surfactant of at least about 3.

Surfactant package and water in hydrocarbon emulsion using same

A water-in-hydrocarbon emulsion includes a water phase, a hydrocarbon phase and a surfactant, wherein the water phase is present in an amount greater than or equal to about 5% vol. with respect to volume of the emulsion, and the water phase and the surfactant are present at a ratio by volume of the water phase to the surfactant of at least about 1. A method for preparing the emulsion is also provided.

Water in hydrocarbon emulsion useful as low emission fuel and method for forming same

A method for preparing an asphalt composition includes the steps of providing asphalt; mixing sulfur with the asphalt at a temperature greater than 200&#xb0; C. to provide a sulfur-asphalt blend; providing a heavy aromatic oil; and mixing the heavy aromatic oil with the sulfur-asphalt blend to provide the asphalt composition. Polymers can also advantageously be incorporated into the asphalt composition.

Method for preparation of asphalt composition

A process for preparing a bimodal emulsion of viscous hydrocarbon in water includes providing a stream of water at ambient temperature; providing a liquid additive that tends to gel when mixed with water at temperatures less than a gelling temperature T; heating the stream to provide a heated stream at a temperature Twhich is greater than ambient temperature and less than the gelling temperature T; feeding the heated stream to a mixer having a mixer inlet so as to impart energy to the heated stream; adding the liquid additive to the heated stream downstream of the mixer inlet, whereby the liquid additive mixes with the stream and the energy inhibits gelling of the liquid additive to provide a substantially homogeneous solution of additive in water. The solution is then divided and used to make two different droplet sized emulsions which are mixed to form the bimodal emulsion.

Manufacture of stable bimodal emulsions using dynamic mixing

A combustible fuel for diesel engines and a process for forming same in the form of a water in hydrocarbon emulsion wherein the mean water drop diameter is.ltoreq.4 .mu.m with a maximum diameter of.ltoreq.10 .mu.m.

Water in viscous hydrocarbon emulsion combustible fuel for diesel

A multiple emulsion includes a continuous water phase; an oil droplet phase dispersed through the continuous water phase; an inner water droplet phase dispersed through the oil droplet phase; and a water insoluble compound suspended in the inner water droplet phase. The multiple emulsion is useful as a transportable and combustible fuel.

Multiple emulsion and method for preparing same

A stable hydrocarbon-in-water emulsion includes a hydrocarbon phase containing natural surfactant; a water phase having an electrolyte content greater than about 10 ppm (wt) and less than or equal to about 100 ppm (wt) with respect to the water phase; and a surfactant additive including an amine and an ethoxylated alcohol in amounts effective to activate the natural surfactant and stabilize the emulsion.

Natural surfactant with amines and ethoxylated alcohol

A combustible fuel for diesel engines and a process for forming same in the form of a water in hydrocarbon emulsion wherein the mean water drop diameter is .ltoreq.4 .mu.m with a maximum diameter of .ltoreq.10 .mu.m.

A method for forming a stable emulsion of a viscous hydrocarbon in an aqueous buffer solution includes the steps of: providing a viscous hydrocarbon containing an inactive natural surfactant and having a salt content by weight of less than or equal to about 15 ppm and having a water content by weight of less than or equal to about 0.1%; forming a solution of a buffer additive in an aqueous solution to provide a basic aqueous buffer solution, the buffer additive being operative to extract and activate the inactive natural surfactant from the viscous hydrocarbon; and mixing the viscous hydrocarbon with the aqueous buffer solution at a rate sufficient to provide an emulsion of the viscous hydrocarbon in the aqueous buffer solution, whereby the buffer additive extracts the inactive natural surfactant from the viscous hydrocarbon into the aqueous buffer solution and activates the inactive natural surfactant so as to stabilize the emulsion. According to the invention, the buffer additive is a water soluble amine. The inactive natural surfactant contained in the viscous hydrocarbon includes carboxylic acids, phenols, esters, and mixtures thereof. Bimodal emulsions, having two distinct droplet size distributions, are also formed according to the method of the present invention and have improved viscosity characteristics.

Emulsion of viscous hydrocarbon in aqueous buffer solution and method

A method for forming a stable bimodal emulsion comprises admixing a viscous hydrocarbon with an aqueous buffer solution under controlled conditions so as to obtain a first monomodal emulsion having an average hydrocarbon droplet size of less than 5 microns. The monomodal emulsion is thereafter diluted with water and additional viscous hydrocarbon is admixed with the diluted monomodal emulsion under a second mixing energy sufficient to produce a bimodal emulsion wherein the average small hydrocarbon droplet size is less than or equal to 5 microns and the average large hydrocarbon droplet size is less than or equal to about 30 microns.

Method for the preparation of viscous hydrocarbon in aqueous buffer

A low viscosity, non-aging hydrocarbon in water emulsion formed from a viscous hydrocarbon comprises from about 70 to 80%/wt. oil, from about 20 to 30%/wt. water, from about 0.1 to 5.0%/wt. of an emulsifying agent, and an average oil droplet size of greater than or equal to 15 microns wherein the emulsion is characterized by a viscosity of less or equal to 1500 centipoise at 80.degree. F. and substantial non-aging over time wherein the change in viscosity of the emulsion is less than 100 centipoise per month.

Emulsion of viscous hydrocarbon in water which inhibits aging

A stable, low viscosity bimodal oil in water emulsion having an emulsifier, a continuous water phase and a discontinuous oil phase having an oil:water ratio of from about 70:30 to about 85:15 by weight, the discontinuous oil phase being characterized by two distinct oil droplet sizes D.sub.L and D.sub.S wherein D.sub.L is about 10 to 40 microns and D.sub.S is less than or equal to 5 microns, the ratio of D.sub.L /D.sub.S is greater than or equal to 4 and about 45 to 85% by weight of the oil is in oil droplet size D.sub.L.

Bimodal emulsion and its method of preparation

Growing community of inventors

Caracas, Venezuela

Hercilio Rivas