Abstract: The present invention relates to a method of producing mineral oil from an underground mineral oil deposit, in which an aqueous saline surfactant formulation comprising a surfactant mixture, for the purpose of lowering the interfacial tension between oil and water to <0.1 mN/m, is injected through at least one injection well into the mineral oil deposit and crude oil is withdrawn from the deposit through at least one production well, wherein the mineral oil deposit is at a temperature of ?25° C. and <130° C.

Abstract: The present invention relates to a method of producing mineral oil from underground mineral oil deposits, in which an aqueous saline surfactant formulation comprising a surfactant mixture, for the purpose of lowering the interfacial tension between oil and water to <0.1 mN/m, is injected into a mineral oil deposit through at least one injection well and crude oil is withdrawn from the deposit through at least one production well, wherein the mineral oil deposit has a temperature of ?90° C.

Abstract: Measuring device for measuring an elasticity and a viscosity of a medium, having a first measuring device part having a volume for receiving the medium to be measured, and a second measuring device part that protrudes into the volume, wherein the first measuring device part in relation to the second measuring device part is sealed by way of a gas flow seal, and wherein the first measuring device part in relation to the second measuring device part is movable in a rotating movement about a predefined axis.

Abstract: Measuring device for measuring an elasticity and a viscosity of a medium, having a first measuring device part having a volume for receiving the medium to be measured, and a second measuring device part that protrudes into the volume, wherein the first measuring device part in relation to the second measuring device part is sealed by way of a gas flow seal, and wherein the first measuring device part in relation to the second measuring device part is movable in a rotating movement about a predefined axis.

Abstract: The present invention relates to an emulsion comprising: a) water, b) at least one crude oil and c) at least one layered double hydroxide of general formula (I), whereby the layered double hydroxide of general formula (I) is present in the form of solid particles. The present invention further relates to a process for the preparation of the emulsion and the use of the same.

Abstract: The present invention relates to a process for recovering oil from a subterranean formation by injecting both solid particles and water into the formation. An oil-in-water emulsion that is stabilized by solid particles is formed in the pores of the formation. This emulsion is recovered from the subterranean formation.

Abstract: The presently claimed invention is related to a method of transporting oil by using a solid particles-stabilized emulsion containing water as continuous phase, oil as a dispersed phase and at least one magnetic solid particle which comprises layered double hydroxide.

Abstract: The present invention relates to a process for recovering oil from a subterranean formation by injecting both solid particles and water into the formation. An oil-in-water emulsion that is stabilized by solid particles is formed in the pores of the formation. This emulsion is recovered from the subterranean formation.

Abstract: A process for mineral oil production, in which an aqueous formulation comprising tris(2-hydroxyphenyl)methane of the general formula (I) is injected into a mineral oil deposit through an injection well and the crude oil is withdrawn from the deposit through a production well, where the R1, R2 and R radicals in the formula (I) are each defined as follows: R is independently 1 to 2 hydrocarbyl radicals per phenyl ring, R1 is preferably H or OH, R2 are independently radicals of the general formula (III), —(R5—O—)n—R6—X??(III) where n is a number from 1-50, and where the R5 radicals are R7 groups R6 is a single bond or an alkylene group having 1 to 10 carbon atoms, X is H or an acidic end group, R10 is, for example, C1-C6-hydrocarbyl radical, enables improved mineral oil production.

Abstract: The presently claimed invention is directed a solid particles-stabilized emulsion containing a continuous phase and a dispersed phase comprising a) water, b) crude oil having a viscosity in the range of 1 to 10000 mPa·s at a temperature of 20° C. according to DIN 53019 and c) at least one layered double hydroxide of general formula (I), wherein water is the continuous phase and crude oil is the dispersed phase, and a process for preparing the same.

Abstract: Rylene dyes of the general formula I where the variables are defined as follows: R is hydrogen; optionally substituted C1-C30-alkyl, C5-C8-cycloalkyl, aryl or hetaryl; R? is bromine; cyano; —NR32; optionally substituted aryloxy, arylthio, hetaryloxy or hetarylthio; optionally substituted C3-C18-alk-1-ynyl; X, Y are both hydrogen or together are a radical of the formula Ia n is 2, 3, 4 or additionally 1 when X and Y are a radical of the formula Ia; n? is from 1 to 4; m is from 0 to 6.

Abstract: Rylene dyes of the general formula I where the variables are defined as follows: R is hydrogen; optionally substituted C1-C30-alkyl, C5-C8-cycloalkyl, aryl or hetaryl; R? is bromine; cyano; —NR32; optionally substituted aryloxy, arylthio, hetaryloxy or hetarylthio; optionally substituted C3-C18-alk-1-ynyl; X, Y are both hydrogen or together are a radical of the formula Ia n is 2, 3, 4 or additionally 1 when X and Y are a radical of the formula Ia; n? is from 1 to 4; m is from 0 to 6.

Abstract: A catalyst which comprises at least one complex of a metal of subgroup VIII having at least one bidentate phosphonite ligand of the formula I or salts and mixtures thereof, a process for the preparation of mixtures of monoolefinic C5-mononitriles, a process for the catalytic isomerization of branched aliphatic monoalkenenitriles and a process for the preparation of adiponitrile.

Abstract: A process for preparing diarylethanes of the general formula I ##STR1## where R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 are each hydrogen or C.sub.1 -C.sub.8 -alkyl, by reacting aromatic compounds of the general formula II ##STR2## where R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 have the abovementioned meanings, with styrenes of the general formula III ##STR3## where R.sup.1 has the abovementioned meanings, at from -20 to 300.degree. C. under from 1 to 100 bar in the presence of heterogeneous catalysts, wherein beta-zeolites or mordenites are used as heterogeneous catalysts.