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公开(公告)号：US20230085467A1
公开(公告)日：2023-03-16
申请号：US17799186
申请日：2021-02-09
摘要： A roller mill for comminuting bulk material may include a first grinding roller and a second grinding roller that are arranged opposite one another and can be driven in opposite directions. A grinding gap exists between the grinding rollers. A floating bearing unit may be configured to receive the first grinding roller, and a fixed bearing unit may be configured to receive the second grinding roller. The floating bearing unit includes two bearings, each of which receives one end of the first grinding roller. Hydraulic actuators are mounted on the floating bearing unit for applying a force to the floating bearing unit. The bearings of the floating bearing unit are connected to one another via a synchronization device that includes a coupling element, which in a coupling position prevents a relative movement of the bearings and in a free position permits a relative movement of the bearings.
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公开(公告)号：US20230074083A1
公开(公告)日：2023-03-09
申请号：US17796758
申请日：2021-01-13
发明人： Bjoern STEGT
摘要： An absorption tower for production of nitric acid by the Ostwald process may include sieve trays that are arranged on top of one another and each spaced apart from one another, a water inlet in an upper region of the absorption tower, an inlet for gaseous nitrogen oxides in a lower region of the absorption tower, and a column bottom that is disposed in the lower region of the absorption tower beneath a lowermost sieve tray and is divided by a dividing wall into a first, radially inner region and at least a second, radially outer region. Nitric acid that trickles down from the lowermost sieve tray with a higher concentration can be collected in a middle region. The less-concentrated nitric acid that then effluxes from sieve trays higher up can then be collected separately in a region farther outward.
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公开(公告)号：US20230038954A1
公开(公告)日：2023-02-09
申请号：US17791881
申请日：2020-12-21
发明人： Paul KERN
摘要： A process for producing nitric acid by the Ostwald process involves reacting ammonia with atmospheric oxygen as primary air to afford a NOx-containing gas stream in an ammonia oxidation reactor at a first pressure and absorbing the NOx-containing gas stream in water in an absorption apparatus at a higher, second pressure. Nitric acid is bleached with bleach air as secondary air at approximately the first pressure. The secondary air is brought to an operating pressure of the bleaching operation via a separate secondary air compressor or compressor stage. The separate secondary air compressor is independent of the compressor that brings the primary air to the first pressure. Compression to the second higher pressure at which the absorption of the NOx gases is performed in the absorption apparatus is provided only downstream of the bleaching operation.
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4.发明申请公开(公告)号：US20220410170A1
公开(公告)日：2022-12-29
申请号：US17793166
申请日：2021-01-22
发明人： Falk SILBERMANN
IPC分类号： B02C17/16
摘要： A stirred ball mill may include a milling jar, at least three agitator shafts, and a drive. The milling jar may be arranged in a main direction and may have a milling chamber that is adapted to receive milling material and milling aid elements. Each of the at least three agitator shafts has a center axis that is arranged parallel to the main direction of the milling jar and is configured as a screw that is mounted fixedly to a frame in the milling jar such that each agitator shaft is rotatable about its center axis. The drive is configured to rotate the agitator shafts about their respective center axes without any contact between the agitator shafts. The center axes of the agitator shafts may be arranged as side edges of a prism.
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公开(公告)号：US20220387954A1
公开(公告)日：2022-12-08
申请号：US17755333
申请日：2020-10-20
发明人： Grigorios Kolios , Frederik Scheiff , Christopher Alec Anderlohr , Hagen Appel , Gerhard Olbert , Bernd Zoels , Dieter Flick , Achim Wechsung , Matthias Kern , Karsten Bueker , Nicolai Antweiler
摘要： A method can be used for operating a descending moving bed reactor with flowable granular material. The method involves: (i) filling an upper lock-hopper with granular material and/or emptying a lower lock-hopper, (ii) purging the lock-hoppers with purging gas, and (iii) filling the reaction chamber containing a descending moving bed from the upper lock-hopper and/or emptying the reaction chamber into the lower lock-hopper. The pressure equalization between the reaction chamber and lock-hopper is achieved with product gas. The method then involves: (iv) optionally, relieving the lock-hoppers and conveying the product gas flow into the product line, and (v) purging the lock-hoppers with purging gas.
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公开(公告)号：US20220306392A1
公开(公告)日：2022-09-29
申请号：US17617903
申请日：2020-06-09
IPC分类号： B65G15/60 , B65G39/071 , B65G39/12 , B65G15/08
摘要： A carrier roller for a conveyor belt may be configured to be rotatable about an axis of rotation and may include a roll element with a rolling support region that is configured to provide rolling support for the conveyor belt. The rolling support region is rotationally symmetrical with respect to the axis of rotation of the carrier roller and has different diameters along its axial extension, including a maximum diameter and a minimum diameter. The minimum diameter of the rolling support region is at least 95% and at most 99.8% of the maximum diameter of the rolling support region. Carrier roller stations and belt conveyor systems may employ such carrier rollers.
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公开(公告)号：US20220298128A1
公开(公告)日：2022-09-22
申请号：US17699102
申请日：2022-03-19
发明人： David BOLZ , Holger WIEDERHOLD
IPC分类号： C07D301/12 , B01J19/24 , B01J29/70 , B01J23/44 , C01B3/36 , C01B15/029 , B01J8/02 , C07C5/333 , B01D53/047
摘要： An integrated process for making styrene and propene oxide which comprises the steps: a) dehydrogenating ethylbenzene in the presence of a dehydrogenation catalyst; b) separating styrene and hydrogen from the reaction mixture of step a); c) producing hydrogen peroxide from hydrogen separated in step b) and oxygen; d) reacting propene with the hydrogen peroxide obtained in step c) in the presence of an epoxidation catalyst to provide a reaction mixture comprising propene oxide; and e) separating propene oxide from the reaction mixture obtained in step d).
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公开(公告)号：US20220258121A1
公开(公告)日：2022-08-18
申请号：US17627425
申请日：2020-07-16
发明人： Christopher JENKINS
摘要： A process for producing alkoxylates features a high growth ratio without the need of interim storage of a pre-polymer produced in a first reactor. The process may involve reacting a monomeric educt in the presence of a catalyst and a starting material in a first reactor equipped with a first circulation loop and thereafter passing a pre-polymer that is produced of the first circulation loop to a second reactor equipped with a second circulation loop, where a desired polymer is produced. The first reactor may comprise a smaller volume than the second reactor. The growth ratio, defined as a final batch volume of the second reactor divided by a minimum initial volume of the starting material in the first reactor, is at least 80:1.
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公开(公告)号：US20220227690A1
公开(公告)日：2022-07-21
申请号：US17607262
申请日：2020-04-22
发明人： Alexander POPPE , Peter KAMMERHOFER , Klaus KREJCI
摘要： Disclosed is a method for preparing vinyl chloride by catalytic thermal cracking of 1,2-dichloroethane, in which method the heat required for the thermal cracking is supplied via a liquid or condensing heat transfer medium, wherein, the heat transfer medium is heated at least in part by means of waste heat from a plant for combusting liquid and/or gaseous residues of a chemical plant. The invention also relates to a plant for preparing vinyl chloride by catalytic thermal cracking of 1,2-dichloroethane. The heat required for thermal cracking can be obtained from cheaply available waste heat. For example, it is possible to temporarily heat the heat transfer medium exclusively by means of the second heating device operated by waste heat, wherein said waste heat can, for example, be waste heat from a plant for preparing vinyl chloride.
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公开(公告)号：US20220220052A1
公开(公告)日：2022-07-14
申请号：US17613702
申请日：2020-05-26
发明人： Alexander SCHULZ
IPC分类号： C07C29/152 , B01J19/24
摘要： A method for the synthesis of methanol, wherein a carbonaceous energy source flow is supplied to a synthesis gas reactor arrangement for obtaining a synthesis gas flow having hydrogen and carbon oxides, wherein the synthesis gas flow is supplied to a thermal recovery apparatus for recovering heat from the synthesis gas flow and then to a synthesis gas compressor for pressure increase. The synthesis gas flow is supplied at least in part to a first reactor stage of a methanol reactor arrangement for partial conversion to methanol, a residual gas flow having unreacted carbon oxides being obtained from the methanol reactor arrangement, which residual gas flow is supplied to a recycling compressor for increasing its pressure, the pressure-increased gas flow being supplied to the methanol reactor arrangement for partial conversion to methanol, a recovery flow from an unreacted residual gas being supplied to the first reactor stage of a hydrogen recovery arrangement to obtain a H-recycling flow. The
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