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WO/2022/156549A1 |
The present invention relates to a method and a system for preparing urea by coupling denitration with electrocatalytic reduction. Specifically, the method of the present invention comprises: introducing an absorption solution containing...
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WO/2022/135355A1 |
Provided is a method for catalytically activating carbon dioxide as a carbonylation reagent with inorganic sulfur. In the method, carbon dioxide can be used to replace a toxic and harmful carbonylation reagent in the presence of H2S and ...
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WO/2022/128328A1 |
A process for the production of urea wherein: production of pure urea (U) includes the concentration of an aqueous urea solution (23) by crystallization; a urea crystallization purge aqueous phase (32) comprising urea, water and biuret, ...
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WO/2022/106636A1 |
The present disclosure relates to the synthesis of prostate specific membrane antigen (PSMA) ligands that are useful in the treatment of diseases like cancer. In particular, the disclosure relates to a method for synthesizing PSMA ligand...
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WO/2022/106083A1 |
A process for the production of biuret from urea wherein: a urea aqueous solution (24) withdrawn from the recovery section of a urea plant is processed to remove water and obtain a concentrated urea melt (25); said urea melt is processed...
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WO/2022/096182A1 |
A process of prilling of a urea melt comprising the use of calcium lignosulfonate or carboxymethyl starch as additive to obtain a formaldehyde-free urea product.
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WO/2022/096183A1 |
A process for the production of feed grade urea starting from a liquid urea melt, the process comprising processing the urea melt (6) to promote the formation of biuret until a concentration of at least 3% biuret, and subjecting the so o...
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WO/2022/074174A1 |
The present disclosure provides a bottom chamber of a stripper (or bottom liquid holder) comprising a vortex breaker, a blocking plate and a guiding plate. The present disclosure further provides a stripper, a urea HP stripper, a urea pl...
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WO/2022/043175A1 |
The presently claimed invention relates to urea urethane compounds obtainable by reacting tolu-ene diisocyanate with a mixture of monohydroxy alcohols followed by reaction with a diamine. The presently claimed invention provides a proces...
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WO/2021/261999A1 |
The disclosure pertains to an urea production plant and process using a thermal stripper, wherein the reaction mixture is separated in two parts, wherein the first part is supplied at least in part to the thermal stripper and the second ...
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WO/2021/250050A1 |
The present disclosure is related to the methods and devices for the manufacture of a urea ammonium sulphate-based composition, in particular in a pipe reactor. In its broadest aspect, the present disclosure is related to a method for pr...
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WO/2021/246485A1 |
Provided is a carbamate production method characterized by bringing a carbon dioxide-containing mixed gas in which the partial pressure of carbon dioxide is 0.001 atm or greater but less than 1 atm, into contact with an amino group-conta...
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WO/2021/246316A1 |
The present invention reduces energy derived CO2 through effective use of CO2 that is in exhaust gas from a cement production facility and that is not derived from fossil fuel, by converting CO2 in exhaust gas from a cement production fa...
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WO/2021/239955A1 |
A process for synthesis of urea wherein a urea containing solution is produced in a synthesis section including a reactor, a stripper and a condenser, and said solution is processed in at least one recovery section obtaining a recovery s...
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WO/2021/230956A1 |
The present disclosure provides processes and apparatuses for the scaled-up manufacture of lomustine via continuous flow manufacture. Such continuous flow processes may optionally include the crystallization of lomustine and the apparatu...
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WO/2021/218048A1 |
Disclosed are an energy storage system and method for co-producing hydrogen and urea, comprising a renewable energy power supply, an electrolytic hydrogen production apparatus, a hydrogen storage tank, an oxygen storage tank, a synthetic...
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WO/2021/209299A1 |
A method for revamping an ammonia-urea plant wherein: the ammonia section is modernized to produce an extra amount of low pressure steam; condensation stage of the high-pressure urea synthesis loop is modified to use part of the condensa...
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WO/2021/206132A1 |
Provided is a method for producing, using a simple procedure, an O-methylisourea sulfate that is important as an intermediate of medicines, agrochemicals and industrial chemicals.　The present invention is a method for producing an O-me...
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WO/2021/205128A2 |
The present invention relates to a flame retardant treatment of a lignocellulosic material, characterized in that it comprises the following steps: - optionally steam explosion of the lignocellulosic material, - impregnation of the optio...
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WO/2021/190994A1 |
Use of a ferritic stainless steel containing at least 23% chromium for the manufacture of components of the high-pressure urea synthesis section of a urea plant.
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WO/2021/170391A1 |
A process for synthesis of urea from ammonia and carbon dioxide wherein: the urea synthesis is performed with a stripping process in a synthesis loop including at least a reactor (1), a stripper (2) and a condenser (3); the reactor efflu...
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WO/2021/170625A1 |
Sequential and once-through (single pass) process for the co-production of methanol and ammonia and conversion of at least a part of ammonia to urea by reaction of the ammonia with carbon dioxide collected from a primary reformer flue ga...
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WO/2021/170709A1 |
This present invention relates to the field of urea synthesis, in particular it discloses a distribution chamber suitable for distributing a liquid stream to a plurality of pipe openings distributed over a planar surface. The distributio...
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WO/2021/170154A1 |
Method of purification of carglumic acid, substance formula I, contains the following steps: a) Dissolution of carglumic acid in dimethyl sulfoxide; b) Addition of a precipitation solvent; c) Isolation of the precipitated solvate of carg...
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WO/2021/156024A1 |
A process for purifying a urea-containing aqueous stream, such as the aqueous stream from the recovery section of a urea plant, comprising a step of removing biuret from the urea-containing stream by reverse osmosis in one or more revers...
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WO/2021/142570A1 |
The present invention provides a method for preparing storage-stable biuret polyisocyanate. The biuret polyisocyanate product obtained by using the method of the present invention has excellent monomer content storage stability, i.e. lit...
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WO/2021/137699A1 |
The disclosure pertains to a urea production process comprising concentrating a first urea solution in a first vacuum evaporator in an evaporation section to give a urea melt and first vapor, and condensing said first vapor in a first co...
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WO/2021/137700A1 |
Disclosed is a method for the removal of ammonia from the off-gas of a finishing section of a urea production plant. Also disclosed is a corresponding urea plant, and a method of accordingly modifying a pre-existing urea plant. In a scru...
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WO/2021/137701A1 |
The disclosure pertains to a urea production process using a first and a downstream second evaporator in an evaporation section, a finishing section and a scrubber for treating off-gas of the finishing section. Condensate from the conden...
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WO/2021/133319A1 |
The invention is related to the compounds which can be used in the treatment of breast, lung and endometrium cancer by inhibiting the p38MAPK enzyme, pharmeceutical compositions containing these compounds and the use of the subject compo...
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WO/2021/123054A1 |
Reactor for the high-pressure non-catalytic synthesis of melamine from urea, comprising coaxial inner reaction zone (6) and outer reaction zone (7) wherein a crude melamine is formed in the inner reaction zone and contacted with gaseous ...
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WO/2021/118741A1 |
Processes and systems for converting a hydrocarbon-containing feed. The feed and heated particles can be contacted within a pyrolysis zone to effect pyrolysis of at least a portion of the feed to produce a pyrolysis zone effluent and a f...
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WO/2021/110909A1 |
The present disclosure is related to a scrubber for removing dust and ammonia from a stream of gas comprising dust and ammonia. The scrubber has an essentially cylindrical shape along a central axis defined by two ends joined by a casing...
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WO/2021/102266A1 |
Di alkenyl succinic amide acids and processes for making and using same. The di alkenyl succinic amide acid can have a chemical formula of (I): where R1 and R2 can independently be a linear or branched C8 to C24 alkenyl group, Z1, Z2, Z3...
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WO/2021/089246A1 |
The present invention relates to a method for producing urea granulate, in which an exhaust gas flow (11) from a urea granulator (10) is subjected to a dust scrubbing process in a granulator exhaust gas scrubber (12) and an aqueous scrub...
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WO/2021/084550A1 |
In the present invention we disclose the method of manufacturing nano nitrogen, The resultant products "nano nitrogen is used as agrochemical (i.e. fertilizer, pesticide, herbicide, fungicide, antimicrobial), but also for other applicati...
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WO/2021/074361A1 |
The present invention discloses an apparatus or scrubber to remove dust, in particular urea dust, and ammonia from a stream of polluted gas. The scrubber has an elongated shape along a central axis defined by two ends joined by a casing,...
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WO/2021/056665A1 |
Disclosed in the present invention are a gemini surfactant for oil displacement, and a preparation method for and an application of the gemini surfactant. The gemini surfactant is 1,3-dialkyl-1,3-dipolyoxyethylene ether urea or 1,3-dialk...
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WO/2021/032819A1 |
The invention relates to a method for producing a urea solution with a target urea concentration using water flows recovered from the urea production process. At least part of the water flows recovered from the urea production process ar...
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WO/2021/027237A1 |
The present invention relates to a method for preparing a supercritical carbon dioxide thickener for the exploitation of tight oil and gas reservoirs. The method can solve the problem of oil and gas deposits being damaged as a result of ...
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WO/2021/018536A1 |
The invention discloses a reformer arrangement for production of synthesis gas and/or hydrogen, at least comprising the following elements: - a main reformer (1) connected to a main reformer reactant feed (2) and a main reformer product ...
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WO/2021/008783A1 |
A process for synthesis of urea from ammonia and carbon dioxide comprising the synthesis of urea in parallel in a first urea reactor (1) at a first urea synthesis pressure and in a second urea reactor (2) at a second and lower urea synth...
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WO/2021/006729A1 |
The application provides in an aspect a process for producing urea in a urea plant comprising a high pressure synthesis section comprising a reactor, wherein the process comprises reacting NH3 feed and CO2 feed under urea formation condi...
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WO/2021/004713A1 |
The invention relates to devices for producing granulated urea with a low biuret content, comprising a synthesizing unit, an evaporator unit, a feed pump, a granulation unit, and multiple lines with different diameters or different or id...
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WO/2021/001121A1 |
A reactor for the synthesis of urea comprising a vertical shell and perforated baffles or trays (3) arranged to define compartments of the reactor, wherein each baffle comprises an array of individual perforated tiles (10) wherein each t...
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WO/2020/250194A1 |
The present disclosure relates to cogeneration of power and one or more chemical entities through operation of a power production cycle and treatment of a stream comprising carbon monoxide and hydrogen. A cogeneration process can include...
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WO/2020/235999A1 |
Disclosed is a urea finishing method including an off-gas treatment, the method comprising urea finishing and supplying the off-gas to a quenching zone and to a scrub column comprising a sump and a venturi stage, wherein the sump has a s...
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WO/2020/225093A1 |
Shell-and-tube strippers for stripping a urea/carbamate mixture, related systems, methods, and uses. The stripper comprises a shell, a plurality of tubes disposed within the shell, and a heating fluid distributor for homogenizing the flo...
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WO/2020/221690A1 |
The invention relates to a method for producing urea, comprising: a) producing formamide on the basis of carbon dioxide, hydrogen and ammonia, wherein methyl formate or ammonium formate is formed as an intermediate product in a catalytic...
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WO/2020/221691A1 |
The invention relates to the use of a ruthenium-phosphine complex as a catalyst for the catalytic synthesis of urea, including the conversion of formamide or formamide with ammonia in the presence of the catalyst, thereby forming urea an...
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