Patent application number | Description | Published |
20090038255 | C-Shape Profile and Partition Comprising a C-Shaped Profile - A C-shaped sheet metal profile for partitions that are planked on both sides is provided. The C-shaped profile is made up of two leg sections and a bottom section that interconnects the leg sections. At least one of the leg sections encloses an opening angle exceeding 90° along with the bottom section in the unstressed state of the C-shaped profile. | 02-12-2009 |
20090090081 | Fastening element for dry construction elements,and method for the production of such a fastening element - Fastening element for dry construction elements, and method for the production of such a fastening element. | 04-09-2009 |
20090113845 | Sheet metal section for dry construction - The invention relates to a sheet metal section for dry construction, including two limb portions and a base portion that connects the limb portions, in addition to at least one reinforcement strip that is situated on one of the limb portions. The sheet metal section is characterized in that it is equipped with a device for fixing the reinforcement strip to the limb portion. | 05-07-2009 |
20090113846 | Sheet metal section for dry construction - The invention relates to a sheet metal section for dry construction, including two limb portions and a base portion that connects said limb portions. According to the invention, at least one of the limb portions is equipped with a bent supporting edge that extends in the longitudinal direction of the section, the bent supporting edge being provided with a reinforcement strip. The section is characterised in that the reinforcement strip extends over the entire width of the bent supporting edge. | 05-07-2009 |
20090126315 | C-Shaped Profile - A C-shaped sheet metal profile for partitions that are planked on both sides is provided. The C-shaped profile comprises two leg sections and a bottom section that interconnects the leg sections. The leg sections form lateral faces of the C-shaped profile. At least one of the leg sections is provided with beads which protrude outward and form a support area for the planking. At least some sections of the beads are embodied such that the support area corresponds to more than 5 percent and less than 25 percent of the lateral face when the depth of penetration of the beads into a planking amounts to 0.3 mm. | 05-21-2009 |
20110296897 | METHOD FOR THE PRODUCTION OF A FASTENING ELEMENT FOR DRY CONSTRUCTION ELEMENTS - A method for the production of a fastening element for dry construction elements involving feeding a flat sheet metal material through a nip formed between a top roller having first teeth and a bottom roller having second teeth, in order to create depressions and elevations as well as slanted sliding surfaces. | 12-08-2011 |
Patent application number | Description | Published |
20140055767 | MIRROR ARRAY - A mirror array having a total surface extending perpendicularly to a surface normal, comprises a multiplicity of mirror elements each having a reflection surface and at least one degree of freedom of displacement, wherein the totality of the mirror elements form a parqueting of a total reflection surface of the mirror array, and wherein the mirror array is embodied modularly as a tile element in such a way that the parqueting of the total reflection surface can be extended by a tiling of a plurality of such mirror arrays. | 02-27-2014 |
20140327895 | OPTICAL COMPONENT - An optical component comprising a mirror array having a multiplicity of mirror elements, which each have at least one degree of freedom of displacement, and which are each connected to at least one actuator for displacement, has a multiplicity of local regulating devices for damping oscillations of the mirror elements, wherein each of the regulating devices in each case has at least one capacitive sensor having at least one moveable electrode and at least one electrode arranged rigidly relative to the carrying structure. | 11-06-2014 |
20140327896 | OPTICAL COMPONENT - An optical component comprises a mirror array having a multiplicity of mirror elements, which are each connected to at least one actuator for displacement, a multiplicity of signal lines for the signal-transmitting connection of the actuators to an external, global control/regulating device for predefining an absolute position of the individual mirror elements, and a multiplicity of local regulating devices for regulating the positioning of the mirror elements, wherein the regulating devices are in each case completely integrated into the component. | 11-06-2014 |
20150185469 | METHOD FOR REGULATING THE TILTING OF A MIRROR ELEMENT - An optical component comprises a carrying structure, at least one mirror element which is mounted in a tiltable manner relative to the carrying structure by an actuator system and which comprises at least one mirror electrode, at least one local regulating device for regulating the tilting of the mirror element, having at least one capacitive sensor and at least one actuator electrode for tilting the mirror element, and a signal generator for generating a modulation signal, having a frequency above a resonant frequency of the mirror element, wherein the signal generator is connected in a signal-transmitting manner to the at least one mirror electrode. | 07-02-2015 |
20160025952 | Optical Module - The present invention relates to an optical module, in particular facet mirror, comprising an optical element and a supporting structure for supporting the optical element, wherein the supporting structure comprises a positioning device for actively setting a position and/or orientation of the optical element in at least one degree of freedom. The supporting structure comprises a selectively activatable contacting device having at least one contacting unit having a first contact section, wherein the first contact section, in an activated state of the contacting device, contacts a second contact section of the optical element in order to exert a contact force on the optical element, while the first contact section, in a deactivated state of the contacting device is removed from the second contact section. | 01-28-2016 |
Patent application number | Description | Published |
20090187051 | Process for the preparation of nitrobenzene by adiabatic nitration - This invention relates to a process for the continuous preparation of nitrobenzene. This process comprises the adiabatic nitration of benzene with a mixture of sulfuric acid and nitric acid, in which the sum of the concentrations in the reaction zone of the metal ions which form sparingly soluble metal sulfates is less than 900 mg/l, based on the volume of the aqueous phase which contains sulfuric acid. | 07-23-2009 |
20100076230 | CONTINUOUS PROCESS FOR THE MANUFACTURE OF NITROBENZENE - The invention relates to a continuous process for the manufacture of nitrobenzene. This process comprises the nitration of benzene with nitrating acid that contains at least 3.0 wt. % of nitric acid and at least 67.0 wt. % of sulfuric acid, in a reaction space in which the start temperature of the reaction is above 100.0° C. but below 102.0° C. In addition, this process requires that the benzene and the nitrating acid are dispersed in one another several times. | 03-25-2010 |
20130131384 | PROCESS FOR RESTORING CATALYST ACTIVITY - The present invention relates to a process for restoring the activity of spent catalysts for the hydrogenation of aromatic nitro compounds, in which a regeneration comprising at least a first burning off stage, a first washing stage, a second burning off stage and a second washing stage is carried out at periodic intervals. | 05-23-2013 |
20130197268 | METHOD FOR PRODUCING NITROBENZENE BY ADIABATIC NITRIDING - The invention relates to a process for the continuous production of nitrobenzene by nitration of benzene with a mixture of nitric acid and sulfuric acid under adiabatic conditions, in which unreacted benzene is separated from the crude product obtained after phase separation before washing thereof, using the adiabatic heat of reaction. | 08-01-2013 |
20130204043 | METHOD FOR CONTINUOUSLY PRODUCING NITROBENZENE - The present invention relates to a continuous process for the production of nitrobenzene by nitration of benzene with nitric acid or mixtures of nitric acid and sulfuric acid to give a crude nitrobenzene, washing of the crude nitrobenzene by means of at least one of each of an acid, alkaline and neutral washing, there being obtained a pre-purified nitrobenzene which, as well as containing nitrobenzene, at least contains also low boilers, optionally middle boilers as well as high boilers and salts, wherein the pre-purified nitrobenzene is purified further by separating off low boilers in a distillation apparatus by evaporation of the low boilers, and separation of nitrobenzene from the resulting further purified nitrobenzene in a distillation apparatus by partial evaporation of nitrobenzene, wherein pure nitrobenzene is removed from the distillation apparatus in gaseous form and is subsequently condensed, and wherein the non-evaporated portion of the further purified nitrobenzene is fed back into the washing at any desired point. | 08-08-2013 |
20130296610 | CHEMICAL REACTOR HAVING WOVEN WIRE MESH PRODUCT AS A RETAINING DEVICE FOR PARTICLES - In a chemical reactor for heterogeneously catalysed reaction of a fluid, comprising a holding device for catalyst particles and/or inert particles ( | 11-07-2013 |
20140131275 | PROCESS FOR PHASE SEPARATION OR EXTRACTION AND DEVICE SUITABLE THEREFOR - The present invention relates to a device for separating two immiscible phases and/or for extracting one phase with another phase (phase separation or extraction device), comprising at least one vessel for receiving the at least two phases, at least one pipe for supplying a fluid to the vessel, at least one pipe for discharging a fluid from the vessel, and at least one arrangement comprising a transparent disk for observing the separation operation or the extraction operation, wherein at least the side of the transparent disk that faces the phases to be separated or extracted consists of sapphire (sapphire glass) or mica ( mica disk), and to the use of such a device in the preparation of di- and polyamines of the diphenylmethane series. | 05-15-2014 |
20150073180 | METHOD FOR CONTINUOUS PRODUCTION OF NITROBENZENE - The invention relates to a method for producing nitrobenzene, in which crude nitrobenzene is first produced by nitrating benzene and said crude nitrobenzene is then washed in succession in at least one acid wash, in at least one alkaline wash and in at least one neutral wash, at least one additional wash with an aqueous solution of a potassium salt being interposed between the last alkaline wash and the first neutral wash. | 03-12-2015 |
20150080611 | METHOD FOR STARTING A REACTION DURING THE PRODUCTION OF AROMATIC AMINES FROM NITROAROMATICS - The present invention relates to a method of producing aromatic amines by hydrogenation of aromatic nitro compounds. This method comprises the steps:
| 03-19-2015 |
20150087862 | METHOD FOR STOPPING A REACTION DURING THE PRODUCTION OF AROMATIC AMINES FROM NITROAROMATICS - The present invention relates to A method for producing aromatic amines by the hydrogenation of aromatic nitro compounds. This method comprises:
| 03-26-2015 |
20150094493 | METHOD FOR TREATING A SUBSTANCE MIXTURE COMPRISING AN AROMATIC AMINE, IN PARTICULAR A SUBSTANCE MIXTURE OF RAW ANILINE - The present invention relates to a method for treating a substance mixture comprising an aromatic amine, wherein the aromatic amine is aniline or 2,4-diaminotoluene, preferably aniline. The substance mixture comprises an aromatic amine and compounds having a higher boiling point than the aromatic amine. The method for treating the substance mixture requires I) separating the first substance mixture by means of distillation in a first distillation unit ( | 04-02-2015 |
20150175521 | METHOD FOR PRODUCING NITROBENZENE BY ADIABATIC NITRIDING - The invention relates to an adiabatic process for producing nitrobenzene by nitrating benzene with sulphuric acid mixtures and nitric acid mixtures using a stoichiometric excess of benzene and reusing non-reacted benzene, the content of the aliphatic organic compounds in the feed benzene being limited, by the targeted evacuation of aliphatic organic compounds to at least one step in the process, to a content of less than 1.5 mass-%, in relation to the total amount of feed benzene. | 06-25-2015 |
20150175522 | METHOD FOR PRODUCING NITROBENZENE BY ADIABATIC NITRIDING - The invention provides a continuous adiabatic process for the preparation of nitrobenzene by nitrating benzene with mixtures of sulfuric and nitric acids using a stoichiometric excess of benzene, wherein the content of organic compounds in the circulating sulfuric acid, at least during the start-up period of the production plant, is always kept below 1.0 mass percent, based on the total mass of circulating sulfuric acid. This is preferably achieved by a procedure in which, either after the end or before the beginning of a production cycle, the circulating sulfuric acid is circulated at elevated temperature so that the organics contained in the sulfuric acid, preferably comprising nitrobenzene and traces of benzene, dinitrobenzene and nitrophenols, are separated off in the evaporation apparatus for concentrating the sulfuric acid. | 06-25-2015 |
20160060152 | PROCESS FOR WORKING UP WASTE WATER FROM NITROBENZENE PREPARATION - The invention relates to a process for working up alkaline waste water which is formed during washing of crude nitrobenzene obtained by nitration of benzene, wherein
| 03-03-2016 |
20160068473 | PROCESS FOR THE PREPARATION OF DI- AND POLYAMINES OF THE DIPHENYLMETHANE SERIES - The invention relates to a method for producing diamines and polyamines of the diphenylmethane series, wherein first aniline and formaldehyde are reacted in the absence of an acidic catalyst to form a reaction mixture containing aminal and water and, after the water has been separated, the aminal is reacted by acid catalysis to form a reaction mixture containing diamines and polyamines of the dephenylmethane series, wherein the separation of the water and aminal is supported by the use of a coalescence aid. According to the invention, a filter bed made of coalescence fiber material is used as coalescence aid. | 03-10-2016 |
20160068474 | PROCESS FOR THE PREPARATION OF DI- AND POLYAMINES FROM THE DIPHENYLMETHANE SERIES - The present invention provides a process for preparing di- and polyamines from the diphenylmethane series by converting aniline and formaldehyde in the absence of an acid catalyst to give aminal and water, removing the aqueous phase and further processing the organic aminal phase to give the di- and polyamines of the diphenylmethane series, in which use of a coalescence aid in the phase separation of the process product obtained in aminal reaction reduces the proportion of water and hence also of water-soluble impurities in the organic phase containing the aminal. The di- and polyamines of the diphenylmethane series obtained by acid-catalysed rearrangement and workup after further processing of the aminal phase are outstanding suitably for preparation of the corresponding isocyanates. | 03-10-2016 |
20160068475 | METHOD FOR PRODUCING DIAMINES AND POLYAMINES OF THE DIPHENYLMETHANE SERIES - The invention relates to a method for producing diamines and polyamines of the diphenylmethane series, wherein first aniline and formaldehyde are reacted in the absence of an acidic catalyst to form a reaction mixture containing aminal and water and, after the water has been separated the aminal is reacted by acid catalysis to form a reaction mixture containing diamines and polyamines of the diphenylmethane series, wherein the separation of the water from the aminal is supported by the use of a coalescence aid. According to the invention, a filter bed made from coalescence fiber material is used an coalescence aid. | 03-10-2016 |
20160075582 | PROCESS FOR WORKING UP WASTE WATER FROM NITROBENZENE PREPARATION - The present invention provides a process for working up alkaline waste water which is formed during washing of crude nitrobenzene obtained by nitration of benzene, wherein | 03-17-2016 |
20160083332 | PROCESS FOR THE PREPARATION OF NITROBENZENE BY ADIABATIC NITRATION - The present invention relates to a continuously operated adiabatic process for the preparation of nitrobenzene by nitration of benzene with nitric acid and sulfuric acid, in which the dilute sulfuric acid obtained after the nitration has taken place and the crude nitrobenzene has been separated off from the aqueous phase is concentrated for the purpose of re-use in the nitration, and after its concentration, at least one minute before it comes into contact with fresh nitric acid again an oxidizing agent is added such that a concentration of the oxidizing agent of from 10 ppm to 5,000 ppm, based on the total weight of the concentrated sulfuric acid to be recycled into the nitration, is established. | 03-24-2016 |