| Patent application number | Description | Published |
|---|
| 20080289948 | Process for Separating Propylene Glycol From Aqueous Compositions - The present invention relates to a process for separating at least one propylene glycol from a mixture (M) comprising water and said propylene glycol, said process comprising (I) evaporating the mixture in at least two evaporation and/or distillation stages at decreasing operating pressures of the evaporators and/or distillation columns obtaining mixture (M′) and mixture (M″); (II) separating the mixture (M′) obtained in (I) in at least one further distillation step, obtaining a mixture (M-I) comprising at least 70 wt.-% of water and a mixture (M-II) comprising less than 30 wt.-% of water. | 11-27-2008 |
| 20090112018 | METHOD FOR PRODUCING POLYISOCYANATES - The invention provides a process for preparing isocyanates by reacting the corresponding amines with phosgene in the presence of solvents, wherein compounds which form salt melts with hydrogen chloride are used as solvents. | 04-30-2009 |
| 20090200236 | PROCESS FOR PRODUCING A COMPOSITE MEMBRANE - A process for the production of a composite membrane, one or more microporous separation layers comprising a zeolite of the MFI type being produced by hydrothermal synthesis on a porous substrate, wherein one or more additives from the group consisting of linear (C | 08-13-2009 |
| 20090203874 | METHOD FOR PRODUCING POLYETHER POLYOLS - A process for preparing polyether polyols by reaction of the following starting materials:
| 08-13-2009 |
| 20090203941 | DIRECT HYDROCARBON AMINATION - A process for aminating hydrocarbons comprises physically removing hydrogen from the reaction mixture. | 08-13-2009 |
| 20100003203 | METHOD OF PRODUCING SURFACE-MODIFIED NANOPARTICULATE METAL OXIDES, METAL HYDROXIDES AND/OR METAL OXYHYDROXIDES - The present invention relates to methods of producing surface-modified nanoparticulate particles at least of one metal oxide, metal hydroxide and/or metal oxide hydroxide, and aqueous suspensions of these particles. The invention further relates to the surface-modified nanoparticulate particles, obtainable by these methods, at least of one metal oxide, metal hydroxide and/or metal oxide hydroxide and aqueous suspensions of these particles, and to their use for cosmetic sunscreen preparations, as stabilizer in plastics and as antimicrobial active ingredient. | 01-07-2010 |
| 20100015012 | METHOD FOR PRODUCING AROMATIC AMINES OR ALIPHATIC AMINO ALCOHOLS - The invention relates to a process for preparing aromatic amines by hydrogenation of nitroaromatics in the presence of catalysts, in which a fluid reaction mixture which comprises amines and from which the catalysts are separated off is formed in a reactor. After the catalysts have been separated off, a measurement of the absorption of UV/VIS radiation by the reaction mixture is carried out to determine the concentration of nitro and nitroso compounds in the reaction mixture. | 01-21-2010 |
| 20100081804 | PROCESS FOR CONTINUOUS HYDROGENATION OR HYDROGENATING AMINATION - A process is described for continuously hydrogenating unsaturated compounds, in which particles of a first hydrogenation catalyst are suspended in a liquid phase in which an unsaturated compound is dissolved, the liquid phase, in the presence of a hydrogenous gas at a first partial hydrogen pressure and at a first temperature, is conducted through a packed bubble column reactor in cocurrent counter to the direction of gravity, the effluent from the bubble column reactor is sent to a gas-liquid separation, the liquid phase is sent to a crossfiltration to obtain a retentate and a filtrate, the retentate is recycled into the bubble column reactor and the filtrate, in the presence of a hydrogenous gas at a second partial hydrogen pressure and at a second temperature, is passed over a bed of a second hydrogenation catalyst, wherein the second partial hydrogen pressure is at least 10 bar higher than the first partial hydrogen pressure. | 04-01-2010 |
| 20100119829 | METHOD FOR PRODUCING SURFACE-MODIFIED NANOPARTICULATE METAL OXIDES, METAL HYDROXIDES, AND/OR METAL OXIDE HYDROXIDES - The present invention relates to methods of producing surface-modified nanoparticulate particles at least of one metal oxide, metal hydroxide and/or metal oxide hydroxide, and aqueous suspensions of these particles. Furthermore, the invention relates to the surface-modified nanoparticulate particles, obtainable by these methods, at least of one metal oxide, metal hydroxide and/or metal oxide hydroxide and aqueous suspensions of these particles, and to their use for cosmetic sunscreen preparations, as stabilizer in plastics and as antimicrobial active ingredient. | 05-13-2010 |
| 20100130788 | METHOD FOR PRODUCING AMINES - The invention relates to a process for preparing aromatic amines by catalytic hydrogenation of the corresponding nitro compounds, in particular for preparing toluenediamine by hydrogenation of dinitrotoluene, wherein hydrogenation catalysts in which a mixture of nickel, palladium and an additional element selected from the group consisting of cobalt, iron, vanadium, manganese, chromium, platinum, iridium, gold, bismuth, molybdenum, selenium, tellurium, tin and antimony is present as active component on a support are used. | 05-27-2010 |
| 20110009645 | MEMBRANE SEPARATION METHOD FOR SEPARATING HIGH BOILER DURING THE PRODUCTION OF 1,3-DIOXOLANE-2-ONES - The present invention relates to a process for the continuous preparation of a 1,3-dioxolan-2-one wherein a discharge from the reaction zone is subjected to a fractionation by means of a semipermeable membrane in order to separate off polymeric by-products. | 01-13-2011 |
| 20110033532 | AQUEOUS POLYMER DISPERSION BASED ON N,N-DIETHYLAMINOETHYL METHACRYLATE, ITS PREPARATION AND USE - The present invention relates to a process for preparing an aqueous polymer dispersion by free-radical emulsion polymerization of a monomer mixture which comprises N,N-diethylaminoethyl methacrylate, to the polymer dispersion obtainable by this process, and to the use thereof. | 02-10-2011 |
| 20110151517 | PROCESS FOR THE PREPARATION OF HOMOPOLYSACCHARIDES - A process for the preparation of aqueous solutions of glucans having a β-1,3-glycosidically-linked main chain and side groups having a β-1,6-glycosidic bond by fermentation of fungal strains. The fungal strains secrete the glucans into the fermentation broth, in an aqueous culture medium, and the separation of the glucans from the fermentation broth is effected using asymmetrical filter membranes. | 06-23-2011 |
| 20110152433 | PROCESS FOR THE PREPARATION OF NANOPARTICULATE ZINC OXIDE - The present invention relates to a process for the preparation of nanoparticulate zinc oxide in the form of aqueous suspensions or in the form of pulverulent solid. Furthermore, the invention relates to the use of zinc oxide particles and suspensions prepared in this way in cosmetic sunscreen preparations, as stabilizer in plastics, in paints, in coatings and as antimicrobial active ingredient. | 06-23-2011 |
