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公开(公告)号：US11845657B2
公开(公告)日：2023-12-19
申请号：US17791869
申请日：2021-01-05
发明人： Peter Stockhoff , Zion Guetta
IPC分类号： C01F11/46 , C01B17/50 , C01B17/56 , C01B17/74 , C01B25/232
CPC分类号： C01B17/745 , C01B17/506 , C01B17/56 , C01B25/232 , C01F11/468
摘要： A process for producing sulfuric acid and cement clinker may use calcium sulfate that is formed as a solid by-product and separated off in phosphoric acid production in a reaction of raw phosphate with sulfuric acid to form phosphoric acid. The process comprises treating calcium sulfate separated from the phosphoric acid with an acid to obtain a suspension comprising purified calcium sulfate, separating the purified calcium sulfate in solid form from the liquid phase of the suspension, mixing the purified calcium sulfate with admixtures and reducing agents to obtain a raw meal mixture for cement clinker production, burning the raw meal mixture to obtain the cement clinker, with formation of sulfur dioxide as offgas, and subjecting the sulfur dioxide formed to offgas purification and feeding the sulfur dioxide as raw material to sulfuric acid production to produce the sulfuric acid. The sulfuric acid produced may be used as starting material in phosphoric acid production.
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公开(公告)号：US20230373789A1
公开(公告)日：2023-11-23
申请号：US17791687
申请日：2021-01-05
IPC分类号： C01B25/232 , C01B25/234 , C04B11/00 , C01F11/46 , C01B17/74
CPC分类号： C01B25/232 , C01B25/234 , C04B11/005 , C01F11/468 , C01B17/74 , C04B2235/447 , C01P2004/61 , C01P2004/62
摘要： A process may involve digesting raw phosphate with concentrated sulfuric acid and converting the raw phosphate to calcium sulfate in the form of dihydrate and/or hemihydrate, and phosphoric acid, separating off calcium sulfate as solid from a liquid phase of a suspension that is obtained, treating the calcium sulfate that is separated off or from a stockpile with an acid to give a suspension with purified calcium sulfate and P2O5-containing acid solution, separating off the purified calcium sulfate as solid from a liquid phase of a suspension obtained, using the P2O5-containing liquid phase as a portion of the sulfuric acid required for digesting the raw phosphate or as feedstock for treating phosphogypsum from the stockpile to give a suspension of purified calcium sulfate and P2O5-containing acid solution, which is thereafter processed.
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公开(公告)号：US20230242350A1
公开(公告)日：2023-08-03
申请号：US17927870
申请日：2021-05-21
发明人： Phillip Esser , Sophie Ruoshan Wei , Martin Krex , David Handl
摘要： The present invention relates to a method for the machine-based determination of the functional state of support rollers (13) of a belt conveyor system (1) during operation of the belt conveyor system, wherein at least one unmanned vehicle (2) with at least one imaging sensor system is provided, by means of which at least sections of the belt conveyor system can be sensed in the form of image data, wherein image data of at least one subregion of the belt conveyor system is captured as thermal image data. In the captured image data of the belt conveyor system, at least one identification image region position is determined automatically, in which at least one subregion of a support roller (13) is imaged. For each identification image region position determined from the image data, an analysis image region position is automatically defined in the thermal image data. In each defined analysis image region position, thermal image data is automatically analyzed and the functional state of support rollers (13) is determined. Furthermore, the present invention relates to a method for the identification of functionally impaired support rollers (13), a computer program configured to carry out these methods, a machine-readable data carrier containing such a computer program, and a device with a data processing device (3) for the evaluation of the captured image data.
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公开(公告)号：US11697631B2
公开(公告)日：2023-07-11
申请号：US17995468
申请日：2021-03-23
发明人： Michael Kleiber , Willi Hofen
IPC分类号： C07C41/42
摘要： A process can be used for recovering 1-methoxy-2-propanol and 2-methoxy-1-propanol from an aqueous effluent stream by liquid-liquid-extraction, followed by extractive distillation, distillation of methoxypropanols from the extraction solvent, and distillative separation of the methoxypropanol isomers. Recovered extraction solvent is recycled to the extraction and extractive distillation. Heat transfer from recovered extraction solvent to the extract fed to the extractive distillation reduces energy demand of the process. A facility for this process contains a countercurrent extraction column, an extractive distillation column, a solvent recovery distillation column, an isomer separation distillation column, and a heat exchanger for transferring heat from recovered extraction solvent to the extract fed to the extractive distillation.
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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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8.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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