Abstract: A hydrodynamic separator for storm water includes weirs and a first plate within a housing to create a pretreatment area for the storm water. The separator further includes a hollow inner member for inducing rotational flow of water and having an outlet below the first plate which outlet is connected to a lower second plate. Solids further settle from the water in the housing below the lower second plate. A water exit path exists between the two plates.

Abstract: An eductor for a water treatment system, including an eductor body having an inlet end and an opposite outlet end, the body defining an interior with a nozzle chamber and a flared conical portion. A jet nozzle is provided that is dimensioned for location in the nozzle chamber, defining an internal passage in fluid communication with the interior. A duckbill valve located in the jet nozzle includes a base from which project a pair of inherently biased, complementary flaps, free ends of the flaps oriented to open towards the outlet end. A mesh cap has a porous exterior wall defining a cavity in fluid communication with the interior, the cap having an open end engageable in the inlet end of the eductor body so that upon attachment of the mesh cap to the inlet end, the duckbill valve is held in position in the internal passage of the jet nozzle.

Abstract: One of the purposes is to provide a pulse discharge power supply for use in generating pulse discharge. The pulse discharge power supply includes a pulse generation unit, a control circuit, an electric current detector and an electric current signal processing unit. The pulse generation unit generates a first pulse, and applies it to a discharge load for generating pulse discharge. The electric current detector detects an electric current flowing into the discharge load in accordance with the application of the pulse. The electric current signal processing unit outputs into the control circuit a signal based on an integration result of the electric current having been detected. The control circuit controls the generation of a second pulse in the pulse generation unit based on the signal being received.

Abstract: A system and method for treating water containing at least one contaminant. The system and method include a water treatment module such as a reverse osmosis unit. An electrochemical contaminant detection system is positioned in the waste water stream of the water treatment module. The contaminant detection system includes a contaminant sensor and a water quality sensor module. The contaminant sensor measures the concentration of the contaminant in the waste water stream and the water quality sensor module measures one or more water quality parameters of the waste water stream. A processor uses an algorithm to determine the concentration of the contaminant in the feed water based on the measurements of the contaminant sensor and water quality sensor module.

Abstract: The present application discloses a method of binding a metal ion in water. The method comprises contacting the water with a fraction of dissolved organic material (DOM) to form a complex between the DOM fraction and the metal ion; and optionally separating the complex from the water. The present application also discloses a use of DOM for binding a metal ion in water.

Abstract: A compact transportable water treatment system for treating water in a reservoir includes a batching unit having a chemical hopper for holding dissolvable chemicals and having a fluid inlet for delivery of fluid into the hopper for dissolving the chemicals to create a chemical solution and a fluid outlet in a lower portion of the chemical hopper for outflow of chemical solution. The batching unit further includes a fluid delivery system configured to deliver the fluid to the chemical hopper through the fluid inlet and a batching tank that receives and holds the chemical solution passing from the fluid outlet. A dosing unit comprising at least one dosing pump is configured to pump the chemical solution from the batching tank to a dosing line. A control unit controls operation of the dosing unit responsive to a chemical concentration of the water in the reservoir.

Abstract: Disclosed are methods, apparatuses and systems for the remediation of contaminated soils, groundwater, water, and/or waste using a combination of reagents. The disclosed methods may be used to treat various recalcitrant halogenated substances, such as perfluoroalkyls and polyfluoroalkyls. Particular combinations of reagents that may be used in the disclosed methods include but are not limited to: (1) persulfate, oxygen and ozone; (2) persulfate, salt, oxygen and ozone; (3) persulfate, phosphate, and/or oxygen; (4) persulfate, phosphate, oxygen and ozone; (5) persulfate, phosphate, salt and oxygen (6) persulfate, phosphate, salt, oxygen and ozone; (7) oxygen and salt; and (8) air and salt. The disclosed methods may enhance destruction of organic contaminants in the liquid phase and may also control the rate of aerosol or foam formation relative to the rate of chemical oxidation and/or reduction/transfer.

Abstract: A surface water mitigation structure suitable for use in the storage and treatment of contaminated surface water runoff. The runoff is processed through a multi-layered filtration and treatment system wherein the first layer is one or more permeable layers that is pervious enough to allow liquid runoff to pass through it and into a porous storage medium second layer that includes one or more remediating agents, and wherein the effluent from the surface water mitigation structure can be discharged to the ground, the surface, and/or a drainage system reduced or free of contaminants.

Abstract: A renewable energy microgeneration apparatus is disclosed that includes a mixing tank that mixes waste with a liquid, a buffer tank that receives and pre-warms the mixed waste, a pasteurization tank that pasteurizes on the pre-warmed mixed waste, a digestion tank that performs anaerobic digestion on the pasteurized waste, a de-watering device that separates liquid digestate and removes salt from the liquid, sensors that measure salinity and biogas quality, and a controller. The controller causes the transfer of digestate from the digestion tank to the pasteurization tank to the dewatering device, causes the de-watering device to separate the liquid and remove the salt from the liquid, monitors the salinity of the liquid and the quality of biogas using the sensors, and causes the mixing of the liquid with the waste and adjusts the feed rate of the waste to reduce the salinity of the waste and increase methane production.

Abstract: This invention relates in general to a system for treating hard water encountered in aircraft potable water equipment; such as hot water heaters and, more particularly, to the prevention of scale deposits in aircraft lavatory and galley heated water system components by installing a unique scale reduction system. The scale reduction system generally comprised of a housing with a modular cartridge inserted therein. The cartridge is porous and contains a chemical composition within its inner cavity, and this chemical composition is mixed with untreated inlet fluid flow so that the outlet flow is of a sufficiently diluted concentration. Various chemical compositions may be utilized to counteract any number of conditions that affect potable water equipment and, in one embodiment, a water softening agent is utilized to combat scale build-up in aircraft plumbing.

Abstract: The present invention is a process, a method, and system for recovery and concentration of dissolved ammonium bicarbonate from a wastewater containing ammonia (NH3) using gas separation, condensation, filtration, and crystallization, each at controlled operating temperatures. The present invention includes 1) removal of ammonia from waste (sludges, semi-solids, and solids and liquids) without the use of chemicals at a temperature of at least 80 degrees Celsius, 2) mixing of the gaseous ammonia with carbon dioxide and water vapor and concentrating dissolved ammonium carbonate and ammonium bicarbonate using reverse osmosis at a temperature of between about 35 and 50 degrees Celsius, and 3) crystallizing concentrated dissolved ammonium carbonate and ammonium bicarbonate at a temperature of less than about 35 degrees Celsius to form solid ammonium bicarbonate and ammonium carbonate.

Abstract: The present invention discloses a dosage optimization method of a chemical conditioner for deeply dewatering the sludge in a municipal wastewater treatment plant, comprises the following steps: (1) optimizing a dosage of a chemical conditioner added into a specific sludge to obtain an optimal dosage proportion of the chemical conditioner corresponding to unit mass of organic matter; (2) calculating an optimal dosage of the chemical conditioner applicable for other sludge to be treated; and (3) adding the chemical conditioner into the sludge to be treated for sludge conditioning treatment, and then performing mechanical dewatering treatment, so as to obtain a deeply dewatered sludge with a moisture content of less than 60%. By improving the reference basis as the key chemical conditioner dosage, the method can effectively solve the problem that types and moisture content range of sludge to which the chemical conditioner dosage control method is applicable are narrow.

Abstract: An arrangement structure for bubbling apparatuses of a furnace, comprising bubbling apparatuses disposed in a melting pool (11) of a furnace. Each bubbling apparatus comprises a bubbling tank (8) and a bubbling tube (9). The bubbling tank (8) is provided at the bottom of the melting pool (11) and disposed in recessed fashion. The bubbling tube (9) is mounted in the bubbling tank (8).The structure can efficiently enhance the physical effect of a bubbling gas on molten glass and improve the quality and production efficiency of the molten glass.

Abstract: An apparatus and a method of actuating a parison plunger includes transforming linear force applied to a plunger extension into roto-translational motion of the plunger extension via a cam path between the plunger extension and a piston.

Abstract: A local bend is formed in a glass sheet (10) by supporting large flat areas (14, 16) of the glass sheet (10) on large flat supports (106L, 106R) that are articulated relative to each other while leaving an area (12) of the glass sheet in which the local bend is to be formed unsupported. A combination of bending forces applied to the glass sheet (10) by articulation of the large flat supports (106L, 106R) and local heating (110) of the unsupported area (12) of the glass sheet (10) produces the local bend.

Abstract: A method and apparatus for producing glass products from tubular glass precursors is provided. In particular, a method and apparatus for separating tube glass into sized glass tube portions, produced glass tube portions, glass precursor portions, or glass product portions, and their use as pharmaceutical packaging are provided. The tube glass or the glass precursor or the glass product is provided with filaments along predetermined breaking planes. The filaments extend obliquely to the local wall radius and allow for clean separation of the tube glass or the glass precursor or the glass product.

Abstract: An optical fiber drawing method where a glass base material passes through an opening provided in a drawing furnace from the material side and drawing is performed by suspending and descending the material into the drawing furnace while being sealed by a sealing mechanism provided in the vicinity of the opening, in which a first portion of the sealing mechanism seals a gap between an outer peripheral surface of the material and an inner surface of the opening when drawing starts and a tapered portion of the material starts passing through the first portion, and a second portion is disposed above the first portion before sealing by the first portion becomes ineffective, and then conduction between inside and outside of the drawing furnace is carried out to prevent fluctuation of pressure inside the furnace immediately after disposing the second portion and the conduction is interrupted when the material further descends.

Abstract: The present invention relates to a glass substrate for a high-frequency device, which includes SiO2 as a main component, the glass substrate having a total content of alkali metal oxides in the range of 0.001-5% in terms of mole percent on the basis of oxides, the alkali metal oxides having a molar ratio represented by Na2O/(Na2O+K2O) in the range of 0.01-0.99, and the glass substrate having a total content of Al2O3 and B2O3 in the range of 1-40% in terms of mole percent on the basis of oxides and having a molar ratio represented by Al2O3/(Al2O3+B2O3) in the range of 0-0.45, in which at least one main surface of the glass substrate has a surface roughness of 1.5 nm or less in terms of arithmetic average roughness Ra, and the glass substrate has a dielectric dissipation factor at 35 GHz of 0.007 or less.

Abstract: Provided is a glass material that can satisfy both a high Faraday effect and a high light transmittance in a short wavelength range. A glass material contains, in % by mole, 30 to 50% Pr2O3 and 0.1 to 70% B2O3+P2O5.

Abstract: The disclosure relates to a hydrophobic window. The hydrophobic window includes a frame; a glass embedded in the frame; and a hydrophobic film on a surface of the glass. The hydrophobic film comprises a flexible substrate and a hydrophobic layer. The flexible substrate comprises a flexible base and a patterned first bulge layer on a surface of the flexible base. The hydrophobic layer is on the surface of the patterned first bulge layer.

Abstract: A layered structure having high adhesive properties, and high hardness or excellent transparency, is prepared on a base material such as a resin. A layered structure including: an organic-inorganic hybrid member containing a primary inorganic particle and an organic polymer covalently bound to each other, wherein the primary inorganic particle forms a network containing the polymer; and a particle aggregate layer containing a secondary particle which is deposited on the organic-inorganic hybrid member and is composed of an inorganic material or a metallic material; wherein in the organic-inorganic hybrid member, the primary inorganic particle and the secondary particle have different crystal particle sizes.

Abstract: Provided is a glassy carbon roll-type mold manufacturing method for fine pattern formation. The method is for manufacturing a glassy carbon roll-type mold configured to form a fine pattern having a micro-nano structure on a substrate including glass or a metal. The method includes: preparing a roll precursor including a thermosetting resin material, the roll precursor having a roll shape with a circumferential surface on which a pattern corresponding to the fine pattern is formed, the roll precursor being configured to press the substrate while rotating on the substrate; and carbonizing the roll precursor.

Abstract: Embodiments of a glass-based article including a first surface and a second surface opposing the first surface defining a thickness (t) of about 3 millimeters or less (e.g., about 1 millimeter or less), and a stress profile, wherein all points of the stress profile between a thickness range from about 0·t up to 0.3·t and from greater than 0.7·t, comprise a tangent that is less than about ?0.1 MPa/micrometers or greater than about 0.1 MPa/micrometers, are disclosed. In some embodiments, the glass-based article includes a non-zero metal oxide concentration that varies along at least a portion of the thickness (e.g., 0·t to about 0.3·t). In some embodiments, the concentration of metal oxide or alkali metal oxide decreases from the first surface to a point between the first surface and the second surface and increases from the point to the second surface. The concentration of the metal oxide may be about 0.05 mol % or greater or about 0.5 mol % or greater throughout the thickness.

Abstract: Provided is a vacuum insulation glass panel assembly manufacturing method and apparatus. The vacuum insulation glass panel assembly manufacturing method includes an edge sealing step of sealing an edge of a glass panel assembly of glass panels spaced apart at a predetermined interval, and an exhaust port sealing step of causing a lid member to seal an exhaust port of the glass panel assembly formed so as to communicate with a space between the glass panels whose edges are sealed. A glass solder having a high melting point is used in the edge sealing step, and a glass solder having a low melting point is used in the exhaust port sealing step. A specially designed lid member closing device is used for exhaust port sealing.

Abstract: A construction material, a hydrophobic, optionally multi-cellular, inorganic particulate material for use in the construction material, for example, to improve the crush strength and/or stability of the construction material, a method of making the construction material, constructions comprising the construction material, and a method of improving the stability of a construction material.

Abstract: Disclosed are asphalt binder compositions and methods for making such compositions with pure sterol:crude sterol blends. The sterol blends improve various rheological properties.

Abstract: The present invention provides a composition and method for controlling air voids in aqueous systems such as paints, coatings, sealants, adhesives, mastics, cements, mortar, masonry, or concrete, which comprises the reaction product of an oxidizing agent and a compound comprising at least one polyalkoxylated polyalkylene polyamine, at least one polyalkyoxylated polyethyleneimine, or a mixture thereof.

Abstract: Provided is an additive for a cement composition capable of preparing the cement composition in which a cellulose being the additive can be uniformly dispersed into a cement matrix thereby enabling to suppress an increase in viscosity thereof, and capable of producing a cement structure having a less shrinkage strain (namely, a high reinforcing effect) and having a fine as well as homogeneous texture, and the additive for a cement composition includes powdery cellulose.

Abstract: A composition comprising thermoset polymer, shape memory polymer to facilitate macro scale damage closure, and a means for molecular scale healing is disclosed; the composition has the ability to resolve structural defects by a bio-mimetic close-then heal process. In use, the shape memory polymer serves to bring surfaces of a structural defect into approximation, whereafter use of the means for molecular scale healing allowed for movement of the healing means into the defect and thus obtain molecular scale healing. The means for molecular scale healing can be a thermoplastic such as fibers, particles or spheres which are used by heating to a level at or above the thermoplastic's melting point, then cooling of the composition below the melting temperature of the thermoplastic. Compositions of the invention have the ability to not only close macroscopic defects, but also to do so repeatedly even if another wound/damage occurs in a previously healed/repaired area.

Abstract: Disclosed are: damage-resistant ECMCs that need to work and remain elastic between minus 120° C. and positive 300° C.; ECMCs that need to be able to contain a flame of 1900° C. for more than 90 minutes; and composite structures, especially highly stressed structures. One of the characteristic problems of ceramic matrices is their fragility. Indeed, when a fracture starts, it propagates easily in the matrix. Disclosed are elastic ceramic matrix composites (ECMCs), for which: the ceramic matrix is split into solid “ceramic microdomains” (CMDs); the CMDs are connected to one another by a dense network of “elastic microelements” (EMEs); and the bonds between the EMEs and the CMDs are strong chemical bonds, preferably covalent.

Abstract: The present invention is directed to methods of preparing biocement. The methods disclosed herein employ microbial or enzymatic means first to generate acid which dissolves CaCO3, and then to degrade urea, producing CO3? ions which increase the pH and lead to the reprecipitation of CaCO3. The precipitation of CaCO3 acts as a cementation process which can bind together particulate materials to yield mortars, concretes and suchlike. The invention further provides construction materials formed by the methods of the invention, and bacterial strains which can be used in the methods of the invention to generate organic acids.

Abstract: The invention concerns a batch for the production of a refractory product, a process for the production of a refractory product, a refractory product as well as the use of a refractory product.

Abstract: A method of producing high strength shaped alumina by feeding alumina power into an agglomerator having a shaft with mixers able to displace the alumina power along the shaft, spraying a liquid binder onto the alumina power as it is displaced along the shaft to form a shaped alumina, and calcining the shaped alumina. The shaped alumina produced having a loose bulk density of greater than or equal to 1.20 g/ml, a surface area less than 10 m2/g, impurities of less than 5 ppm of individual metals and less than 9 ppm of impurities in total, and/or crush strength of greater than 12,000 psi.

Abstract: Provided is a high-light transmittance zirconia sintered body, prepared by processing and forming a material for the high-light transmittance zirconia sintered body, and then performing high-temperature sintering in the atmosphere under normal pressure. The material for a high-light transmittance zirconia sintered body is prepared from zirconia powder and ?-aluminum oxide as raw materials, wherein the molar percentage of yttrium oxide in the zirconia powder is 4-6%. The high-light transmittance zirconia sintered body can be used for preparing a fixed dental prosthesis. The zirconia sintered body has a grain size of 0.1-0.7 ?m, and due to the dispersion and toughening by aluminum oxide, the zirconia sintered body has a higher strength and toughness. Pores in the zirconia powder can be eliminated by adding aluminum oxide. The zirconia sintered body has a higher light transmittance, and the prepared dentures are good in texture, good in jade-like appearance, and closer to the human teeth.

Abstract: A body including a first phase having silicon carbide, a second phase comprising a metal oxide, the second phase being a discrete intergranular phase located at the grain boundaries of the first phase, and the body has an average strength of at least 700 MPa.

Abstract: A method for forming a hole within a ceramic matrix composite component includes forming a first core portion for a ceramic matrix composite component; embedding a hollow member into the first core portion at a desired location; wrapping the first core portion with a first ceramic matrix composite material; inserting a rod through the hollow member and into the first core portion; removing the hollow member; assembling a second core portion to the first core portion such that the rod extends into the second core portion; and wrapping the first core portion and the second core portion with a second ceramic matrix composite material.

Abstract: A prepreg for a ceramic matrix composite, a process for the preparation of a green body with the help of the prepreg, and a process for the preparation of the ceramic matrix composite from the green body prepared according to the present invention are provided. The inventive process comprises the following steps: a) impregnating an arrangement of ceramic fibers with a slurry, which slurry comprises the following components: (i) 10 to 40 vol.-%, based on the total volume of the slurry, of ceramic particles, (ii) an alcoholic organic solvent selected from: (ii-1) 21 to 35 wt.-%, based on the total weight of the ceramic particles in the slurry, of glycerol, (ii-2) 10 to 35 wt.-%, based on the total weight of the ceramic particles in the slurry, of an oligo or polyethylene glycol with an average molecular weight of at most 800 g/mol, (ii-3) 10 to 35 wt.-%, based on the total weight of the ceramic particles in the slurry, of at least one C2-C6 alkane diol, and (ii-4) 10 to 35 wt.

Abstract: A polycrystalline diamond compact including a cemented carbide substrate and a polycrystalline diamond layer bonded to the cemented carbide substrate. The cemented carbide substrate is cylindrical and includes a circumferential wall. The polycrystalline diamond layer includes a central part including between 8 and 15 wt. % of cobalt and an outer part including between 0.5 and 2 wt. % of cobalt. The outer part is a columnar ring belt and includes a chamfer. The outer part includes an upper surface, a side surface connected to the circumferential wall of the cemented carbide substrate, and a chamfer surface connecting the upper surface and the side surface. The chamfer includes a first terminal connected to the upper surface of the outer part and a second terminal connected to the side surface of the outer part.

Abstract: A ceramic fiber processing apparatus and method for processing ceramic fibers for the manufacture of ceramic matrix composites (CMCs) is provided. The apparatus includes a frame including a plurality of unidirectional ceramic fibers wound thereabout and extending across a void therein the frame to define a first planar array of ceramic fibers and a second planar array of ceramic fibers. During use, the frame is disposed in the ceramic fiber processing apparatus in a manner to enable gripping of the first planar array of ceramic fibers with a first gripper assembly and gripping of the second planar array of ceramic fibers with a second gripper assembly. A cutting mechanism provides cutting of the plurality of unidirectional ceramic fibers to separate the first planar array of ceramic fibers and the second planar array of ceramic fibers from one another.

Abstract: The invention relates to a composite heat insulation system, comprising an insulating layer, optionally a reinforcing layer, which is applied to the insulating layer, and a cover layer, which is applied to the insulating layer or, if present, to the reinforcing layer, characterized in that the cover layer contains composite particles, wherein the composite particles contain at least one organic polymer and at least one inorganic solid, wherein the weight percentage of inorganic solid is 15 to 40 wt %, with respect to the total weight of organic polymer and inorganic solid in the composite particle.

Abstract: A method is provided for applying porous carbonaceous particles to soil for purpose of cultivating plants having roots, where at least 95% of the porous carbonaceous particles have a particle size less than or equal to 10 mm. The method incorporates the porous carbonaceous particles into the soil surrounding the plant roots at a depth of between 0-24 inches from the soil surface, where the porous carbonaceous particles are positioned in the area surrounding the roots of the plants at a ratio of between 1:999 to 1:1 porous carbonaceous particles to soil.

Abstract: The invention relates to a microbial delivery system where biochar acts as a carrier for microbes.

Abstract: Reaction products and methods for making and using such reaction products are provided. For example, a reaction product comprising an adduct formed from urea, formaldehyde, and a urease inhibitor is described, which can be provided in various forms. For example, such a reaction product can be in the form of a solid or solution. Such a reaction product can also be combined with one or more additional components, including but not limited to, additional urease inhibitor and/or a nitrogen-based fertilizer composition.

Abstract: This invention relates to detonator-sensitive assembled booster charges for use in blasting engineering. The booster charge comprises nitroalkane and a cavity-forming agent.

Abstract: The invention relates generally to propellant stabilizers. The invention also relates to methods of producing a propellant comprising a propellant stabilizer as well as an ammunition cartridge comprising the stabilized propellant. The propellant stabilizer comprises a compound of formula 1 and the propellant comprises a compound of formula 1 and an energetic material.

Abstract: Explosive compositions for use in high temperature, reactive ground, or both, are disclosed. The explosive compositions can include an emulsion with a continuous organic fuel phase and a discontinuous oxidizer phase. The oxidizer phase can include one or more Group I or Group II nitrates.

Abstract: Embodiments herein concerns the eco-friendly conversion of simple alcohols to linear or branched functionalized alkanes, by integrated catalysis. The alcohols are firstlyoxidized either chemically or enzymatically to the corresponding aldehydes or ketones, followed by aldol condensations using a catalyst to give the corresponding enals or enones. The enals or enones are subsequently and selectively hydrogenated using a recyclable heterogeneous metal catalyst, organocatalyst or an enzyme to provide linear or branched functionalized alkanes with an aldehyde, keto- or alcohol functionality. The process is also iterative and can be further extended by repeating the above integrated catalysis for producing long-chain functionalized alkanes from simple alcohols.

Abstract: Aspects of the invention are associated with the discovery of approaches for the conversion of sour natural gas streams, by conversion to liquid hydrocarbons. Particular processes and their associated apparatuses advantageously combine (i) dehydroaromatization (DHA) of methane in a gaseous feedstock, to produce aromatic hydrocarbons such as benzene, with (ii) the reaction of H2S and methane in this feedstock, to produce organic sulfur compounds such as carbon disulfide (CS2) and thiophene (C4H4S). A gaseous product having a reduced concentration of H2S is thereby generated. The aromatic hydrocarbons and organic sulfur compounds may be recovered in a liquid product. Both the gaseous and liquid products may be easily amenable to further upgrading. Other advantages of the disclosed processes and apparatuses reside in their simplicity, whereby the associated streams, including a potential gaseous recycle, generally avoid high partial pressures of H2S.

Abstract: Methods for making higher-octane fuel components from a feed stream of C8+ paraffins, including catalytically cracking the C8+ paraffins using a Zeolite catalyst to produce a reaction product of mid-chain paraffins and olefins and short-chain paraffins and olefins. The reaction product comprises liquid phase paraffins having an increased Octane Value over the feed stream paraffins. The reaction product further comprises a gas phase of short-chain paraffins which are separated from the liquid phase. In embodiments, the short chain olefins are hydrogenated to form mid-chain paraffins and a gas phase containing short-chain paraffins.

Abstract: The present invention concerns a method for preparing tetrafluoropropene utilising three reactors and comprising the steps of (a) implementing, in the first and second reactors, at least one step of reacting, in the gas phase, a compound B in the presence of hydrofluoric acid and a catalyst, in alternation with a step of regenerating the catalyst by bringing it into contact with a regeneration flow comprising an oxidising agent, (b) implementing, in the third reactor, a preliminary step of producing the compound B, in alternation with a step of regenerating the preliminary catalyst with a regeneration flow comprising an oxidising agent. The step of regenerating the preliminary catalyst in the third reactor is implemented in the absence of a step of reacting the compound B in the presence of hydrofluoric acid in said first and second reactors. The present invention also concerns a facility configured to implement the present method.