摘要:
The invention relates to a method for compressing a gas stream containing hydrogen sulfide, comprising (i) compressing the gas stream containing the hydrogen sulfide in a compressor, (ii) flushing the compressor with a mixture containing dialkyl polysulfides, dialkyl disulfides and at least one amine; to a method for producing sulfur compounds selected from the group consisting of alkyl mercaptans, dialkyl disulfides and alkane sulfonic acids, comprising reacting gas streams containing hydrogen sulfide, wherein the gas streams containing hydrogen sulfide are compressed according to the method comprising the steps i) and ii); and to the use of a mixture containing dialkyl polysulfides, dialkyl disulfides and at least one amine for removing sulfur deposits occurring during the compression of a gas stream containing hydrogen sulfide.
摘要:
The present invention relates to a method for separating at least one first substance from a mixture containing said at least one first substance in an amount of 0.001 to 1.0 wt %, based on the total mixture, and at least one second substance, comprising at least the following steps: (A) bringing the mixture into contact, (B) optionally adding at least one dispersant, (C) treating the dispersion with at least one hydrophobic magnetic particle, (D) separating the enrichment product from step (C) from the mixture by applying a magnetic field, (E) optionally splitting the separated enrichment product from step (D).
摘要:
The present invention relates to novel compositions comprising a metal component selected from a group chosen from at least one polyoxometalate, at least one heteropolyoxometalate and a mixture thereof; and, at least one organic component. The present invention also relates to methods of preparing the nanorod arrays and the nanorod materials and films. The present invention also relates to novel compositions to generate metal-oxide rich films, and also relates to processes for via or trench filling, reverse via or trench filling and imaging with underlayers. The materials are useful in wide range of manufacturing applications in many industries, including the semiconductor devices, electro-optical devices and energy storage industry.
摘要:
The present invention relates to a process for the preparation of bis-(2-hydroxyethyl)-disulfide by oxidizing 2-mercaptoethanol with oxygen in a reaction mixture comprising at least one homogeneously distributed iron comprising salt or complex as catalyst and at least one tertiary amine, to bis-(2-hydroxyethyl)-disulfide, obtainable with the process, and to the use of this bis-(2-hydroxyethyl)-disulfide as intermediate in the manufacture of chemical compounds, such as lubricant additives and in the tertiary oil recovery.
摘要:
The invention relates to a method for hydrogenating aromatic compounds with hydrogen in the presence of a catalyst containing ruthenium on a zirconium oxide support material. The invention also relates to the use of a catalyst containing ruthenium on a zirconium oxide support material for hydrogenating aromatic compounds.
摘要:
The present invention relates to a melamine-formaldehyde foam comprising microspheres having a core comprising at least one active and/or effective substance selected from the group consisting of inorganic compounds, latent heat accumulators, flame retardants, surfactants, detergents, dyes, fragrances, biocidally acting substances, intumescents, hydrophobicizing agents, adhesives, substances influencing haptics or the soil release behavior, formaldehyde scavenger, substances improving indoor air quality, skin care products and formulations, abrasives and mixtures thereof and having a shell comprising at least one melamine-formaldehyde resin, a process for their preparation and to the use thereof.
摘要:
The invention relates to a thermoformable melamine/formaldehyde foam containing 0.1 to 50 wt.% of at least one particulate filler material, said weight percentage being based on the total weight of a melamine/formaldehyde precondensate and the filler material used in the production of the foam. The at least one particulate filler material has a maximum melting point of 220 °C and an average particle diameter of 5 µm to 750 µm. The invention also relates to a method for producing the thermoformable melamine/formaldehyde foam and to the use of the melamine/formaldehyde foam for acoustic or thermal insulation in the field of automobile, ship, rail vehicle, and spacecraft construction, in the upholstery industry, or for insulating pipelines.
摘要:
A process for producing a polymer foam comprises reacting components A to C in the presence of component D and optionally E or an isocyanate-functional prepolymer of components A and B with component C in the presence of component D and optionally component E, the total amount of which is 100 wt%, (A) 35 to 65 wt% of at least one polyisocyanate component A, wherein 10 to 100 wt% of component A is a condensation product comprising polyimide groups and resulting from condensing at least one polyisocyanate component with at least one polycarboxylic acid having at least 3 COOH groups per molecule or with the anhydride of said acid, (B) 5 to 50 wt% of at least one polyol component B, (C) 1 to 59 wt% of at least one polycarboxylic acid component C, and (D) 0.01 to 3 wt% of at least one Lewis base component D, (E) 0 to 5 wt% of at least one foam stabilizer component E, wherein the reaction takes place with a release of carbon dioxide.
摘要:
Disclosed are compositions for negative-working thick film photophotoresists based on acrylic co-polymers. Also included are methods of using the compositions.
摘要:
The present invention relates to a continuous method for producing at least one aromatic amine by hydrogenation of at least one nitroaromatic with hydrogen, wherein a liquid phase containing at least the aromatic amine and a gaseous phase containing at least hydrogen are present, in the presence of a catalyst suspended in the liquid phase, at a temperature of 50-250°C and a pressure of 5-0 bar. The pressure in the reactor is held substantially constant by continuously adjusting the quantity of hydrogen supplied to the reactor, the total amount of hydrogen supplied to the reactor is monitored and the supply of the at least one nitroaromatic is interrupted if the hydrogen uptake of the reactor does not amount to at least 50 mol% of the hydrogen quantity required for stoichiometric reaction of the at least one nitroaromatic to form the at least one aromatic amine.