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WO/2016/124413A1 |
Method for revamping a plant for high pressure melamine synthesis, wherein the plant has a high pressure section which includes essentially a melamine reactor (1) fed with urea melt, and the raw melamine produced inside said reactor is t...
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WO/2016/114670A1 |
The invention pertains to the synthesis of carbamate and urea compounds. In particular the invention is directed to the synthesis of carbamate and urea compounds which may be used in the production of compounds that are used to stabilize...
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WO/2016/109622A1 |
The present invention is directed to a method for enhancing the rate of formation of the reaction products of a carboxylic acid and a urea having the formula (I) where R1, R2, R3 and R4 are the same or different and are selected from the...
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WO/2016/099267A1 |
Disclosed is a method for the removal of urea dust from the off-gas of a finishing section of a urea production plant. the method comprises subjecting the off-gas to quenching with water so as to produce quenched off-gas. The quenched of...
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WO/2016/099269A1 |
The present invention presents a stripping process for urea production with a total recycle. An important characteristic of the described urea process is a substantially complete CO 2 conversion, which eliminates the need for carbamate r...
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WO/2016/083005A1 |
Plant for the synthesis of urea, comprising: a synthesis section comprising at least one reactor, a compressor for supplying CO2 to said synthesis section, a gas turbine for the operation of said CO2 compressor and a heat recovery steam ...
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WO/2016/074813A1 |
A process for the finishing of urea comprising: (a) removing water from an aqueous urea solution in a first evaporation and condensation section, obtaining a urea melt; (b) subjecting said urea melt to a finishing treatment comprising gr...
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WO/2016/048695A1 |
A compound for imparting water repellency and optionally stain release to substrates wherein the compound is prepared by reacting (a) at least one isocyanate group-containing compound, (b) at least one isocyanate-reactive compound and (c...
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WO/2016/047356A1 |
The present invention relates to a process for producing a high-purity aqueous urea solution while utilizing a urea production process at least including a urea synthesis step in which urea is synthesized from feed materials to produce a...
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WO/2016/049282A1 |
The invention relates to a compound prepared by (i) reacting (a) at least one compound selected from diisocyanate, polyisocyanate, or mixture thereof; (b) at least one isocyanate-reactive compound selected from a fluorinated alcohol; a c...
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WO/2016/010432A1 |
Disclosed is a process for the preparation of a urea product suitable for being diluted with water so as to form an aqueous urea comprising solution for use in a unit for the reduction of NOx in combustion engine exhaust gases, also know...
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WO/2016/010416A1 |
The present invention provides a method for increasing the capacity of a urea production complex, the method comprising a step of adding to an existing urea production complex a CO2 production unit, which unit employs a CO2 production me...
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WO/2015/193377A1 |
The invention relates to a particulate urea-containing composition, to a method and a device for producing same, to the use thereof as fertilizer, as technical urea, or as a feed additive, and to the use of an additive for producing a pa...
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WO/2015/170293A1 |
A cleaning system (1) for cleaning a gas stream from a solidification unit (2) of a urea plant (3) comprises a first removal device (7) for removing urea powder and a second removal device (8) for removing ammonia, the two removal device...
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WO/2015/165352A1 |
The present invention provides a compound with a structure represented by general formula I or a pharmaceutically acceptable salt thereof, a preparation method for the compound or the salt, and a use of the compound or the pharmaceutical...
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WO/2015/165741A1 |
An integrated process for the synthesis of urea and melamine, wherein: urea is synthesized with a stripping process in a high-pressure synthesis loop comprising a reactor, a stripper and a carbamate condenser, and the urea solution leavi...
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WO/2015/158792A1 |
The invention relates to rheology control agents comprising at least one active substance of general formula (I) and at least one active substance of general formula RB4OOC-NH-RB3-NH-CO-NRB2-(CH2)x-RB1-(CH2)x-RB2-CO-NH-RB3-NH-
COORB4, to...
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WO/2015/158794A1 |
The invention relates to a urea preparation containing (A) 5 to 75 wt.% of one or more urea components which have a molecular weight of at least 350 g/mol and contain at least one urea group; (B) 15 to 95 wt.%, preferably 30 to 80 wt.%, ...
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WO/2015/136444A1 |
A recovery system (1) for processing a gas stream from a solidification unit (2) of a urea plant (3), in particular, a cooling air stream used in the solidification unit (2) and containing ammonia, comprises a scrubber (11) connected to ...
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WO/2015/136443A1 |
A recovery system (1) for processing a gas stream from a solidification unit (2) of a urea plant (3), in particular, a cooling air stream used in the solidification unit (2) and containing ammonia, comprises a scrubber (11) connected to ...
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WO/2015/126150A1 |
The present application relates to a t-butyl ketone binaphthol derivative and a method for manufacturing same, the t-butyl ketone binaphthol derivative being a high-efficiency chiral-extracting agent which has very high chiral selectivit...
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WO/2015/109666A1 |
Disclosed are an ester group-containing aromatic propionamide compound, and a preparation method therefor and uses thereof, and provides a chemical structure formula of the new ester group-containing aromatic propionamide compound. The c...
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WO/2015/093942A1 |
Disclosed is a process for the integrated production of urea and melamine. A urea production zone produces a urea synthesis stream comprising urea, water and ammonium carbamate. This stream is subjected to processing, preferably involvin...
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WO/2015/089962A1 |
Provided is a method for continuously preparing biuret polyisocyanate, comprising: a mixed solution of a diisocyanate and a catalyst with water vapour, in an aerosol form, are continuously reacted in a first reactor; the product obtained...
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WO/2015/086149A1 |
The invention relates to a method for preparing ammonia gas and CO2 for a urea synthesis process. In the method according to the invention, a process gas (2) comprising as main components nitrogen, hydrogen and carbon dioxide is generate...
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WO/2015/072854A1 |
Disclosed is a method for the removal of soluble particulate matter from a gas stream, such as urea dust from the off-gas of a finishing section of a urea production plant. The method comprises subjecting the off-gas to at least two quen...
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WO/2015/009195A1 |
The invention relates to novel substances, and more particularly to optical isomers of (+) and (-)-benzhydryl ureas of formula (I) and (+) and (-)-1-[(3-chlorophenyl)-phenyl-methyl] urea, a pharmaceutical composition based thereon, and a...
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WO/2015/002535A1 |
Disclosed is a method for the removal of urea dust from the off- gas of a finishing section (1) of a urea production plant, the method comprises subjecting the off-gas to quenching with water (06) so as to produce quenched off-gas, and s...
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WO/2014/207960A1 |
Provided are a method for effectively removing triuret from aqueous urea, a method for producing high purity aqueous urea, and a method for recovering triuret from aqueous urea. To this end, the method for producing aqueous urea comprise...
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WO/2014/192823A1 |
Provided is a urea synthesis method of excellent reliability and productivity, the method minimizing the amount of oxygen used as an anti-corrosion agent without using a special two-phase stainless steel. In the urea synthesis device, wh...
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WO/2014/187621A1 |
A process for co-production of ammonia, urea and methanol from natural gas, comprising the steps of (a) producing a synthesis gas by simultaneous feeding naturalgas to an autothermal reformer (ATR) and to a steam methane reformer (SMR), ...
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WO/2014/185819A1 |
Carbamide is produced from ammonia and carbon dioxide under an increased temperature and pressure and with a molar ratio of NH3:CO2=(3.4-3.7):1 in a carbamide synthesis reactor. Gases and a liquid carbamide synthesis melt are discharg...
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WO/2014/180761A1 |
In an ammonia stripping or self-stripping plant for the synthesis of urea, it is disclosed that a shell-and-tube stripper has a bundle of tubes made of a duplex stainless steel 29Cr-6.5Ni-2Mo-N according to UNS S32906 or 27Cr-7.6Ni- 1 Mo...
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WO/2014/154454A1 |
A method for revamping a self-stripping urea plant comprising the installation of a new CO2-stripping synthesis section (6), wherein at least part of the aqueous urea solution (10) leaving said new section (6) is directed to the existing...
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WO/2014/146995A1 |
The invention provides novel compounds having the general formula (I) wherein R1, R2, R3, R4, W, A and B are as described herein, compositions including the compounds and methods of using the compounds.
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WO/2014/151212A1 |
In various aspects, systems and methods are provided for integration of molten carbonate fuel cells with processes for synthesis of nitrogen-containing compounds. The molten carbonate fuel cells can be integrated with a synthesis process...
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WO/2014/144272A1 |
The present invention provides synergistic combinations of monochlorourea with other biocides for controlling microbial growth in aqueous systems. It also provides synergistic combinations of dimethyl monochlorourea with other biocides f...
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WO/2014/122894A1 |
In a chemical plant 100 including a carbon dioxide recovery unit 10 and a urea plant 11, the carbon dioxide recovery unit 10 treats combustion exhaust gas from a boiler B to separate and recover carbon dioxide. Low-pressure steam 33 gene...
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WO/2014/106533A1 |
The invention relates to a method for the combined elimination of both ammonia and lower alkanes and/or hydrogen, which are contained in one or more waste gas streams in an industrial plant, by combined oxidation and reduction according ...
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WO/2014/104893A1 |
Disclosed is a method of increasing the capacity of an existing urea plant. With reference to the regular components of a urea plant, including a synthess section comprising a a high pressure carbamate condenser and a reactor, and a reco...
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WO/2014/104894A1 |
Disclosed is a urea plant comprising an additional reactor. With reference to the regular components of a urea plant, including a recovery section and a high pressure carbamate condenser, the additional reactor is positioned between the ...
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WO/2014/078895A1 |
The present invention relates to new fatty acid analogues and to their use in cancer therapy, including antimetastatic therapy.
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WO/2014/065327A1 |
[Problem] To provide an acrylic or methacrylic compound having a hydroxyl group, and a method for producing the same. [Solution] An acrylic or methacrylic compound having a hydroxyl group represented by formula (1). (In the formula, R1 r...
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WO/2013/108191A9 |
A method of forming urea by integration of an ammonia production process with that of a urea production process, as well as a system for said method is disclosed, as well as an alternative method of forming urea by integration of a part ...
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WO/2014/027929A1 |
The invention relates to processes and plants for producing urea from ammonia and carbon dioxide and can be used in the chemical industry and in the production of fertilizers. The process of producing urea by synthesizing same from carbo...
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WO/2014/016090A1 |
A process and a related plant for the synthesis of urea, where a solution (13) comprising urea is obtained in a synthesis section (10), said solution is treated in a recovery section (14), and an aqueous solution (15) comprising mainly u...
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WO/2014/016745A1 |
The invention relates to a process comprising: reacting isobutyraldehyde with an aqueous solution of urea in the presence of a phase transfer catalyst to form isobutylidene diurea. Preferably, the phase transfer catalyst is a quaternary ...
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WO/2014/016089A1 |
An ammonia-urea plant where purge gas stream (3) generated in the urea section is used as ammonia source for selective catalytic reduction of nitrogen oxides in combustion fumes (4) which are emitted by the ammonia section; a related pro...
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WO/2014/001672A1 |
In a method for the combined production of ammonia synthesis gas and carbon dioxide from a mixture of hydrocarbons, the cooled mixture from a reverse conversion is separated in an adsorption unit by pressure modulation (or PSA) producing...
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WO/2014/001917A2 |
Method for the productioii of ammorsia, and optionally urea, from a flue gas effluent from an oxygen-fired, process, wherein the production of ammonia and optionally urea includes a net power production. Also provided is a method to effe...
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