Showing papers on "Emulsified fuel published in 1990"

Stabilized oil-in-water emulsions or suspoemulsions containing pesticidal substances in both oil and water phases

Abstract: The present invention relates to stabilized, concentrated or diluted emulsions of the oil-in-water (O/W) type exhibiting a pesticidal activity and to a process for making use of the emulsions. More specifically the invention relates to stable O/W macroemulsions which comprise one or more pesticidal active ingredients in the oil phase or additionally, macroemulsions which comprise one or more pesticidal active ingredients in both the oil and water phases, wherein the oily phase is emulsified or dispersed in the water phase by an emulsifying system; and wherein the emulsions are further stabilized by a solid dispersing agent, namely titanium dioxide, which maintains or improves the emulsion stability. It also relates to a suspoemulsion obtained by milling the said emulsion with an additional solid pesticidal substance.

The use of emulsions to represent dielectric materials in electromagnetic scale models

Abstract: Simple emulsions are examined as materials with adjustable electrical constitutive parameters. These emulsions are mixtures of oil, saline solution, and a suitable stabilizing agent (emulsifier). Since the relative permittivities of oil and water are around two and eighty, respectively, a large range of permittivity can be obtained for the emulsions. The conductivity of the emulsions can be adjusted by changing the normality of the saline solution. A series of oil-in-water emulsions (oil droplets in water), suitable for use in scale models, is developed; this includes the selection of an appropriate emulsifier. The electrical constitutive parameters of these emulsions are adjustable over wide ranges, and are predictable from a simple formula. As an example, an emulsion that is a scale model for red-clay earth is described. >

Rheology of highly flocculated oil in water emulsions

Abstract: The viscous flow behavior of highly flocculated oil in water emulsions was studied experimentally using a co-axial cylinder viscometer. The aqueous phase of the emulsions consisted of a non-Newtonian solution of Carbopol-940 in tap water; the oil phase consisted of a Newtonian white mineral oil. The emulsions produced were very viscous and they appeared “gelled”. The shear stress/shear rate behavior of the emulsions was described by the Casson's model. The yield-stress in emulsions was found to depend upon the concentrations of the dispersed phase (oil) and the polymer. The yield-stress increased non-linearly with the dispersed phase concentration and it increased linearly with the polymer concentration

Flashing of superheated water-in-oil emulsions : micro-explosion of emulsified fuels

Abstract: The flashing temperature of superheated water droplets dispersed in fuels was measured to investigate the micro-explosion of emulsified fuels. As fuels, kerosene, diesel fuel and tetradecane were used. Water, aqueous methanol and ethanol solutions were used as the dispersed phase. The emulsions were prepared by two methods: mechanical and ultrasonic, and were stabilized by Span 80. The emulsion samples in a test tube were heated in an oil bath at a rate 2 K/min. The flashing temperature, represented by the 50% flashing temperature, decreases with increasing surface area per unit volume of the emulsion sample. The flashing temperatures were observed to depend on the composition of both the continuous and dispersed phases; this dependence was expressed as a function of the surface excess of surfactant.

High emulsifier content explosives

Abstract: The present invention relates to water-in-oil emulsion explosive compositions comprising a discontinuous aqueous phase, a continuous water-immiscible organic phase, and an emulsifier content being at least 45% by weight of the emulsified fuel phase which decreases precompression or dead pressing.

Production of emulsified fuel

Abstract: PURPOSE:To readily and profitably provide a homogeneous, highly stable emulsified fuel having a high effect for inhibiting the generation of nitrogen oxides and dusts and also capable of suppressing the generation of the corrosion of installations by jetting steam into a fuel oil. CONSTITUTION:Steam is jetted in a jetting pressure of 0.5-20kgf/cm (preferably 3-10kgf/cm into a fuel oil, if necessary, containing an emulsifier, e.g. in an amount of 1wt.% to add 0.5-30wt.% (preferably 1-20wt.%) of the water to the fuel for providing the objective jet fuel.

軽油・水(w/o形)乳化燃料に関する研究 : 噴霧特性の時間的推移について

Abstract: The fluidity of an emulsified fuel made of water and gas oil was analyzed as a function of water content and lapse of time. As a result, it was found that the emulsified fuel was unstable, mainly due to the coalescence of distributed water droplets in the fuel. The degree of the coalescence is expressed by a newly introduced specific surface area ratio of emulsified fuel : Sp/Se, which has close relationships to the distance between the water droplets. Se is the surface area of emulsified fuel fuel which is assumed to be spherical, and Sp is the sum of the surface areas of distributed water droplets (which are also assumed to be spherical) surface area in the emulsified fuel. The more water content increase, the more the value of Sp/Se increases. The more lapse of time increase, the more the the value of Sp/Se decreases. The relative viscosity of the emulsified fuel is proportional to the value of Sp/Se.