Abstract: In a device for separating methane from a gas mixture containing methane, carbon dioxide and hydrogen sulfide, comprising a gas compressor, two or three membrane separation stages downstream of the compressor and a hydrogen sulfide adsorber, comprising a bed of activated carbon having catalytic activity for oxidizing hydrogen sulfide with oxygen, arranged upstream of the membrane separation stages, oxygen content and relative humidity can be adjusted for optimum adsorption capacity of the hydrogen sulfide adsorber by recycling permeate from the second membrane separation stage, which receives the retentate of the first membrane separation stage, to a point upstream of the hydrogen sulfide adsorber.

Abstract: A composition for use as a multifunctional wax dispersant can treat subterranean formations for the recovery of oil and gas from oil and gas wells. A process can be used for the preparation thereof. A method for treating a crude oil with a wax dispersant composition according to the present invention reduces interfacial tension between the crude oil and the treatment fluids in the recovery of oil and gas from crude oil and gas wells.

Abstract: Compositions containing at least one ceramide, at least one polyglycerol carboxylic acid ester, and cholesterol in specific ratios by weight are provided.

Abstract: Polyalkyl (meth)acrylates are useful in compressor oils. A method of increasing the energy efficiency of a compressor involves operating the compressor with a compressor oil containing a polyalkyl (meth)acrylate-based viscosity index improver.

Abstract: The use of surfactant formulations comprising long-chain alcohols as additives in aqueous polymer dispersions for production of porous polymer coatings, preferably for production of porous polyurethane coatings, is described.

Abstract: A solvent-free composition contains the following components: 2,4,7,9-tetramethyl-5-decyne-4,7-diol, ethoxylates thereof, and polyethylene glycols, wherein the composition contains water and wherein the concentration of 2,4,7,9-tetramethyl-5-decyne-4,7-diol is greater than 40% by weight, based on the composition.

Abstract: The invention relates to a process for producing a porous polyurethane coatings, using a polyol ester as additives in an aqueous polymer dispersion, the process comprising the steps of a) providing a mixture comprising an aqueous polymer dispersion, a polyol ester, and an additive, b) foaming the mixture to give a homogeneous, fine-cell foam, c) adding at least one thickener to establish the desired viscosity of the wet foam, d) applying a coating of the foamed polymer dispersion to a suitable carrier, e) drying the coating. The invention further relates to a phosphorylated polyol ester.

Abstract: A process can be used for the preparation of tris(trichlorosilyl)dichlorogallylgermane, which is a chlorinated, uncharged substance.

Abstract: 1,2-propanediol is prepared by a method involving reacting propene with hydrogen peroxide at 50 to 110° C. in the presence of a catalyst mixture, containing a phase transfer catalyst and a polytungstophosphate, in a liquid reaction mixture containing an aqueous phase with a maximum apparent pH of 6 and an organic phase. The method then involves separating the reaction mixture into an aqueous phase containing 1,2-propanediol and an organic phase; recycling at least part of the separated organic phase to the reaction; and recovering 1,2 propanediol from the aqueous phase. The method further involves reacting a tungstate with hydrogen peroxide and phosphoric acid at 5 to 40° C., in the presence of the phase transfer catalyst, in a liquid mixture containing an aqueous and an organic phase, followed by passing at least a part of the resulting organic phase containing the polytungstophosphate and phase transfer catalyst to the initial reaction.

Abstract: The present invention relates to a method of extracting carbon dioxide (CO2) gas from an aqueous solution comprising dissolved CO2, the method comprising: (a) contacting the aqueous solution with dissolved CO2 with an organic phase; (b) heating the aqueous solution and the organic phase to a temperature of at least 50° C., whereby the CO2 migrates from the aqueous solution to the organic phase; and (c) separating the CO2 from the organic phase, wherein the aqueous solution comprises at least 50% water by weight at a temperature of 10° C. to and a base; the organic phase has a higher CO2 solubility relative to water solubility; and the aqueous solution and the organic phase are in direct contact with each other and are maintained as two separate phases.

Abstract: A reactive diluent system for composite resins contains a reactive diluent composition, which contains an organic phosphorus compound, and an accelerator system. The accelerator system contains at least one iron salt or complex, at least one transition metal salt or complex selected from cobalt and copper, and optionally at least one solvent.

Abstract: A process prepares dialkyl 1,4-cyclohexanedicarboxylates by ring hydrogenation of the corresponding dialkyl terephthalate having a CO value of less than 0.3 mg KOH/g. The dialkyl 1,4-cyclohexanedicarboxylates thus produced can be used as plasticizers or as a component of a plasticizer composition for plastics, in particular PVC.

Abstract: A method for preparing 1,2-propanediol involves reacting propene with hydrogen peroxide in the presence of a catalyst mixture, containing a phase transfer catalyst and a heteropolytungstate, in a liquid reaction mixture containing an aqueous phase with a maximum apparent pH of 6 and an organic phase. The method then involves separating the reaction mixture into an aqueous phase (Pa) containing 1,2-propanediol and formic acid and an organic phase (Po); recycling at least part of the separated organic phase (Po) to the reaction; contacting at least a part of the separated aqueous phase (Pa) with a palladium catalyst; and recovering 1,2 propanediol from the aqueous phase provided by the contacting. The contacting of at least a part of the separated aqueous phase (Pa) with the palladium catalyst reduces the content of formic acid.

Abstract: A method for preparing 1,2-propanediol involves reacting propene with hydrogen peroxide, in the presence of a phase transfer catalyst and a heteropolytungstate, in a liquid two phase reaction mixture with an organic phase containing an alkylaromatic hydrocarbon solvent. The method then involves separating the reaction mixture into an aqueous phase containing 1,2-propanediol and an organic phase, recycling the oxygen depleted organic phase to the reaction, and recovering 1,2 propanediol from the aqueous phase. The reaction and separation are carried out in liquid flooded vessels at a pressure high enough to suppress desorption of gas from the liquid reaction mixture. The separated organic phase is contacted with a stream of a non-flammable gas to desorb from 10 to 75% of the oxygen dissolved in the organic phase into the stream of non-flammable gas, before recycling the organic phase which purges oxygen safely with little loss of propene.

Abstract: A process for preparing C5 aldehydes involves hydroformylation of butenes with synthesis gas in the presence of a homogeneous catalyst system and a solvent. It is a feature of the process that the aldehyde concentration in the reaction mixture is limited.

Abstract: A process for removing butenes from C4-hydrocarbon streams containing butanes and butenes involves extractive distillation with a suitable solvent. The process also involves heat integration, which allows utilization of the heat of the solvent for heating and/or at least partly evaporating various streams.

Abstract: D,L-methionine may include, based on the total weight of the D,L-methionine, from 15 to less than 50 wt.-% of the D,L-methionine with a particle size from more than 0 to less 150 micrometers, from 50 to less than 90 wt.-% of the D,L-methionine with a particle size from more than 0 to less 300 micrometers, and from 30 to less than 80 wt.-% of the D,L-methionine with a particle size in the range between 63 and 300 micrometers. The D,L-methionine may have a bulk density of at least 710 kg/m3.

Abstract: A method for preparing 1,2-propanediol involves reacting propene with hydrogen peroxide in the presence of a catalyst mixture containing a phase transfer catalyst and a heteropolytungstate, in a liquid reaction mixture containing an aqueous phase with a maximum apparent pH of 6 and an organic phase. The process then involves separating the reaction mixture into an aqueous phase (Pa) containing 1,2-propanediol and an organic phase (Po); recycling at least part of the separated organic phase (Po) to the reaction; and recovering 1,2 propanediol from the separated aqueous phase (Pa). In the recovery, 1,2-propanediol is separated from the aqueous phase (Pa) by distillation and the apparent pH of the separated aqueous phase (Pa) is adjusted to at least 9 prior to the distillation to reduce the content of formic acid and acetic acid in the recovered 1,2-propanediol.

Abstract: The transport container for concentrated hydrogen peroxide comprises: a cuboid carrier frame; a liquid container provided inside the carrier frame (1) and frictionally connected thereto, said container having an internal volume of between 65 and 500 I and consisting of pure aluminium, chromium-nickel steel, a nickel-based alloy, or a steel coated with a polyolefin or clad on the inner face; a pressure equalisation device and a pressure relief valve, both of which are provided on the upper face of the liquid container; and at least one sealable opening of the liquid container for the charging and/or removal of hydrogen peroxide.

Abstract: Precipitated silicas having, a N-cetyl-N,N,N-trimethylammonium bromide (CTAB) surface area ?115 m2/g, a dioctyl adipate (DOA) absorption ?130 ml/(100 g), a RoTap for >300 ?m of ?86%, and a pore volume distribution of V (d5?d50)/V (d5?d100)<0.66. A method of producing the precipitated silicas.