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WO/2024/083571A1 |
A process for the synthesis of melamine including the purification of the offgas released by the synthesis of melamine by means of a single purification stage (6); in the purification stage (6), the offgas (3) is washed with fresh urea m...
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WO/2024/080874A1 |
The disclosure pertains to urea production with, in series, an MP carbamate condenser for condensing at least urea synthesis section off-gas, gas/liquid separation giving a gas stream and a liquid stream, and a second carbamate condenser...
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WO/2024/075988A1 |
The present invention relates to a urea solution efflorescence detergent additive and a preparation method therefor. By providing a urea solution efflorescence detergent additive, which is prepared through: a mixture preparation step (S1...
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WO/2024/062060A1 |
The present invention relates to an apparatus for synthesising urea, the apparatus comprising an ammonia source 10 and a urea synthesis unit 20, the ammonia source 10 being connected to the urea synthesis unit 20 via a reactant line 30, ...
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WO/2024/047213A1 |
The present disclosure provides a urea-producing plant comprising a first steam network, configured to receive high-pressure steam, and a second steam network, configured to receive low pressure steam, wherein the plant comprises a steam...
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WO/2024/040866A1 |
A high-pressure urea solution pressure-reducing and energy-saving device for a urea device, comprising a hydraulic turbine (1), a liquid level adjustment valve (2), a power device (3) driven by the hydraulic turbine (1), and a manual rem...
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WO/2024/010450A1 |
The disclosure pertains to a process for the production of urea and melamine, wherein off-has from a high pressure melamine plant is combined with a urea liquid obtained from flashing of a urea synthesis solution. Also disclosed is a sys...
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WO/2023/237398A1 |
A process for removing biuret for solid urea (UR), wherein the solid urea is in a granular or powder form, the process including leaching the solid urea with a leaching solution (LS) which is a urea saturated aqueous solution, wherein bi...
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WO/2023/219506A1 |
The disclosure pertains to a high pressure carbamate condensation apparatus for a urea plant, a urea plant, and a urea production method. The apparatus comprises a first U-shaped tube bundle arranged around a second U-shaped tube bundle.
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WO/2023/198802A1 |
The present disclosure provides a heat exchanging section for extending a falling film heat exchanger comprising a cylindrical body comprising a fluid inlet for a heating or cooling fluid, and a fluid outlet for a heating or cooling flui...
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WO/2023/176921A1 |
Disclosed is a urea production method and a urea production apparatus with which hydrogen and oxygen are generated by electrolysis of water in an electrolysis unit (E), nitrogen is separated from air and recovered in an air separation un...
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WO/2023/161236A1 |
The present invention relates to methods for the production of a solid urea-thiosulfate fertilizer wherein the method comprises preparing a liquid urea-thiosulfate blend comprising 70-90 wt.% urea and 10-30 wt.% thiosulfate salt and proc...
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WO/2023/161232A1 |
The present invention relates to methods for the co-production of urea-based solid nitrogen fertilizer and urea-based solid nitrogen-sulfur fertilizer wherein urea recovered from a gas stream obtained from regular urea production is recy...
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WO/2023/158314A1 |
The disclosure pertains to a urea production process wherein carbamate in a medium pressure (MP) urea solution is decomposed in a tube bundle of a high pressure (HP) carbamate condenser and resulting gas is condensed in indirect heat exc...
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WO/2023/158303A1 |
A urea plant and urea production process of the stripping type are provided that are adapted for making Diesel Exhaust Fluid (DEF) or precursor thereof in a DEF production unit downstream of a treatment section. The treatment section rec...
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WO/2023/156360A1 |
The invention relates to a combined system for producing a urea forming material. The combined system has at least one urea synthesizing device (1) and a urea forming device (2), and the combined system has a process condensate cleaning ...
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WO/2023/153257A1 |
[Problem] To provide a urea production device and a urea production method with which it is possible to produce urea under conditions which do not require a high temperature or high pressure, and using carbon dioxide and ammonia as start...
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WO/2023/145821A1 |
Disclosed is a urea synthesis method in which a urea synthetic liquid produced in a urea synthesis tower A is brought into contact, under heat, with at least a part of raw material carbon dioxide in a stripper C, separated mixed gas is i...
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WO/2023/139089A2 |
The present disclosure provides a vertically positioned device for separating vapor from a liquid comprising: a container for holding a first liquid vapor composition; a container inlet for a first liquid vapor composition; a first conta...
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WO/2023/121443A1 |
The disclosure pertains to a urea plant and process of the thermal stripping type as well as to a method of modifying a urea plant of the thermal stripping type. Provided is a urea plant with a thermal stripper and a high pressure carbam...
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WO/2023/114015A1 |
Provided is an epoxy-functional resin and a process for its manufacture comprising reacting a polyisocyanate; and a compound: HX-Y-(Z)n wherein, X is O, N, or S, Y is a linear or branched C1-C15 alkyl group, and Z is -CH=CDE or Z is -F-O...
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WO/2023/114040A1 |
Provided is a dual-cure epoxy and cyclic carbonate-containing urethane compound comprising an oxidized cyclic carbonate containing allyl-functional-carbamate which comprises a reaction product of a cyclic carbonate containing allyl-funct...
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WO/2023/114644A1 |
Provided is a glycidyl carbamate-functional composition comprising a reaction product of an allyl carbamate composition with a ketone, water, a base, and an aqueous solution of an oxidant, wherein the allyl carbamate composition comprise...
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WO/2023/114645A1 |
Provided is a polyurethane with pendant epoxy groups. The invention further provides a process for producing these polyurethanes with pendant epoxy groups, the process comprising (1) reacting a diisocyanate with a compound containing one...
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WO/2023/114041A1 |
Provided is a dual-cure epoxy and cyclic carbonate-containing urethane compound comprising an oxidized cyclic carbonate containing allyl-functional-carbamate which comprises a reaction product of a cyclic carbonate containing allyl-funct...
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WO/2023/106377A1 |
Provided is a method for producing a blocked isocyanate compound, the method comprising a reaction step of reacting a primary amine compound, a carbonic acid derivative, and a blocking agent by means of heat treatment in the presence of ...
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WO/2023/067500A1 |
A continuous method for making granules of methylene urea-isobutylene diurea (MU-IBDU) includes: injecting an MU-IBDU slurry including water and MU-IBDU particles into a fluid bed granulator, wherein the fluid bed granulator includes see...
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WO/2023/025922A1 |
The present disclosure provides a method for producing a SNCR/SCR solution, comprising the steps of: a) reacting ammonia and carbon dioxide in a high pressure section, thereby obtaining an aqueous composition comprising urea and ammonium...
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WO/2023/022012A1 |
The present disclosure addresses the problem of providing a method that is for producing a synthetic resin (X) and that enables reduction in environmental load when producing the synthetic resin (X). A method for producing the synthetic ...
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WO/2023/022013A1 |
The present disclosure addresses the problem of providing a method which is for producing a synthetic resin (X) and by which the load on the environment can be reduced when producing the synthetic resin (X). A method for producing a synt...
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WO/2023/008556A1 |
The purpose of the present invention is to provide a drug which specifically binds to PSMA, which is effective in treatment and diagnosis of tumors or cancers that express PSMA, such as treatment and diagnosis of prostate cancer, especia...
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WO/2023/280684A1 |
A process for the synthesis of urea and melamine, wherein urea synthesized in a urea plant is used to produce melamine in a melamine plant connected to the urea plant, according to a high-pressure non-catalytic melamine synthesis process...
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WO/2022/268669A1 |
A particulate polyurea compound a2) for reducing gloss of coatings, a resin composition and a crosslinkable composition comprising the particulate polyurea compound is provided, wherein the volume percentage of particles of the particula...
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WO/2022/262244A1 |
A urea co-crystal form A of apixaban, and a preparation method therefor. The urea co-crystal A has high physical and chemical stability, crystal form stability and drug forming stability, better solubility, and higher bioavailability. Th...
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WO/2022/260524A1 |
The disclosure pertains to a urea production plant and process using a high-pressure CO2 stripper, downstream medium-pressure treatment unit and a medium-pressure dissociator receiving urea synthesis solution from the reactor, wherein ga...
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WO/2022/243742A1 |
The invention describes a plant for the production of urea in aqueous solution comprising: a pure water treatment apparatus (lmp_H20); a storage and heating tank (S1) for the pure water (H20), comprising a temperature probe (ST1), a cond...
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WO/2022/229148A1 |
A urea stripper or evaporator provided with fittings in the bottom liquid holder to reduce gas carryover wherein said fittings may include one or more of: perforated screens horizontally arranged or vertically in the bottom liquid holder...
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WO/2022/231428A1 |
Embodiments of the disclosure pertain to a chemical reactor comprising a mixing zone comprising first static mixer and a second static mixer both arranged in shell of the reactor, wherein the second static mixer is positioned further fro...
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WO/2022/218914A1 |
The present invention refers to a process for preparing carbonyl-containing compounds of formula (Ia), (Ib) or (Ic) from Bisphenol A-based Polycarbonate and appropriate nucleophiles in the presence of imidazole or a derivative thereof as...
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WO/2022/214453A1 |
Process for the preparation of urea granules comprising the steps of obtaining an aqueous urea solution from one or more synthesis and recovery steps wherein ammonia and carbon dioxide are reacted together, subjecting the aqueous urea so...
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WO/2022/200472A1 |
The invention relates to a plant (1) for producing urea granules, comprising at least one urea granulator (2), at least one dust scrubber (3), at least one concentration device (4) and at least one condensation device (5). In this plant:...
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WO/2022/177438A1 |
Some embodiments of the disclosure pertain to a plant and a process for producing a urea-containing product. The plant comprises a medium pressure dissociation unit and a high pressure CO2 stripper each receiving a part of the urea synth...
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WO/2022/164901A1 |
In the present invention, the inventors provide substituted the hydroxyl group in hydroxyurea (HU) with a triphenylphosphonium (TPP) cation attached to an alkyl group with different chain lengths, generating a new class of mitochondria-t...
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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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