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WO/2024/154943A1 |
The present invention relates to a method for preparing a recycled material using waste copolyester, the preparation method comprising the steps of: (1) depolymerizing waste copolyester to obtain a first reactant; (2) removing impurities...
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WO/2024/153687A1 |
The invention relates to a method for producing 1,2-cyclohexane dicarboxylic acid dialkyl esters, in which a phthalic acid dialkyl ester is hydrogenated with water in the presence of a heterogeneous hydrogenation catalyst, characterised ...
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WO/2024/152408A1 |
Disclosed are an alkylzinc reagent, and a preparation method therefor and a use thereof, relating to the technical field of synthetic organic chemistry. The structural general formula of the alkylzinc reagent is R-ZnOPiv·Mg(OPiv)Br, whe...
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WO/2024/153680A1 |
The invention relates in particular to novel compounds of general formula (I), wherein A is in particular a group A0, wherein R1, R2 and R3, which are identical or different, are chosen from a hydrogen atom, and B is in particular a hydr...
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WO/2024/152641A1 |
Disclosed in the present application is a preparation method for 3-chlorobicyclo[3.2.1]-3-octen-2-ol, which belongs to the technical field of pharmaceuticals. The preparation method for 3-chlorobicyclo[3.2.1]-3-octen-2-ol may be obtained...
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WO/2024/149256A1 |
A dialkyl succinate hydrogenation method capable of prolonging the lifetime of a hydrogenation catalyst. The method comprises: (1) introducing a material stream containing dialkyl succinate into a hydrogenation guard-be reactor filled wi...
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WO/2024/149255A1 |
A two-stage dialkyl maleate hydrogenation method for prolonging the service life of a catalyst, relating to the field of processing of dialkyl maleate, and comprising: (1) in the presence of hydrogen, introducing a material flow containi...
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WO/2024/146158A1 |
The present invention relates to the technical field of organic synthesis, and in particular relates to a preparation method for an antioxidant 3052. The preparation method comprises: S1, under the protection of nitrogen, adding 2-tert-b...
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WO/2024/145964A1 |
The present invention provides a cationic lipid compound with high efficiency, low toxicity and stable expression, which is a compound of formula (I) or an N-oxide, a solvate, a pharmaceutically acceptable salt or a stereoisomer thereof....
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WO/2024/144394A1 |
A method for obtaining a monomer by degrading a polymer, the polymer being a homo or copolymer of the monomer is described. The method comprising the steps of providing the polymer and a solvent as a reaction mixture in a reactor, wherei...
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WO/2024/140423A1 |
A method for preparing a lacidipine intermediate compound. The method comprises reacting compound II with compound III in the presence of an organic base. The method has simple and mild reaction conditions, high yield and few side reacti...
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WO/2024/139853A1 |
The present application discloses a preparation method for a phenoxy carboxylic acid ester, comprising: 1) a salt of a phenolic compound undergoing a condensation reaction with a halogenated carboxylic acid ester in a polar solvent under...
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WO/2024/141893A1 |
Crystallization process of BHET in which a BHET solution is introduced into a crystallizer equipped with an impeller positioned in the lower part of the crystallizer and coaxial to a draft tube, which in turn is coaxial to the internal w...
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WO/2024/140282A1 |
The present invention relates to preparation methods for pilocarpine and the intermediate compounds thereof. Specifically, the present invention relates to key intermediates, i.e. compounds of formula (I) and formula (II), for preparing ...
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WO/2024/139427A1 |
The present invention relates to a catalyst system for a carbonylation reaction and a method for a carbonylation reaction. The catalyst system comprises: (a) a group VIII metal or a compound of the group VIII metal; (b) a bidentate phosp...
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WO/2024/135708A1 |
This method is for producing a compound A represented by formula (1), the method comprising at least one of step HX, step ST, or step PR. (The definitions in formula (1) are each described in the description.)　Step HX: A step for intro...
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WO/2024/137960A1 |
Disclosed herein are catalytic systems and methods of using the same for preparing a compound comprising an ester group. The catalytic system comprises a first catalyst comprising a metal selected from bismuth, aluminum, titanium, zircon...
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WO/2024/133012A1 |
It is provided a process of making the compound of formula (I) comprising the steps of a) providing styrene, b) converting styrene to the compound of formula (I) in the presence of a catalyst and acetic acid, wherein the catalyst is sele...
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WO/2024/127991A1 |
The present invention addresses the problem of preventing failure of a measurement apparatus and carrying out accurate measurement.　The present invention pertains to a vinyl monomer production device 1 comprising: a vinyl monomer gas g...
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WO/2024/124501A1 |
Provided is a method for improving the utilization rate of raw materials in the production process of adipic acid. The method has a route of "benzene hydrogenation-cyclohexene/benzene/cyclohexane material esterification-cyclohexyl carbox...
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WO/2024/126176A1 |
A process for continuously preparing tert-butyl (meth)acrylate by conversion of (meth)acrylic acid in the liquid phase in a reactor with gaseous isobutene, which is passed through the liquid phase, in the presence of an acidic catalyst, ...
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WO/2024/122452A1 |
A method for producing a (meth)acrylate mixture that implements the following steps 1 and 2.　Step 1: Implement any of the following steps.　Step (1-1): React a (meth)acrylic acid and a trihydric or higher alcohol and obtain a reaction...
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WO/2024/123528A1 |
Provided is process preparing an alkyl methacrylate comprising: (a) reacting propionaldehyde and formaldehyde produce methacrolein intermediate stream; (b) subjecting methacrolein intermediate stream produced in step (a) to at least one ...
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WO/2024/122345A1 |
The present invention addresses the problem of providing a method for producing a homo-coupling reaction product, whereby it becomes possible to substantially eliminate the use of an organic solvent, to carry out a reaction under a mild ...
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WO/2024/121123A1 |
This invention concerns the finding that the saponification of the diastereomeric mixture of bicyclo[6.1.0]non-Z-4-ene of structure (1) in a mixture of water and an alcohol is stereoselective, wherein preferentially the exo-diastereomeri...
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WO/2024/123529A1 |
A catalyst for oxidative esterification of methacrolein to methyl methacrylate comprises a support having an average diameter of at least 0.8 mm. The support is selected from an oxide of silicon, a carbide of silicon, a metal oxide, and ...
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WO/2024/123530A1 |
A process for concurrently producing methacrylic acid and methyl methacrylate comprising: a) producing methacrolein from propionaldehyde and formaldehyde; b) splitting the methacrolein into a first methacrolein stream and a second methac...
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WO/2024/123205A1 |
The invention relates to a process for producing carboxylic acid esters by the esterification of carboxylic acids and/or the re-esterification of carboxylic acid esters with C1-C5 simple alcohols, characterized in that the process is car...
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WO/2024/123526A1 |
Provided is a process for preparing an alkyl methacrylate comprising reacting methacrolein with an alkyl alcohol in an oxidative esterification reaction (OER) system in the presence of at least one inhibitor, an oxygen-containing gas, an...
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WO/2024/122077A1 |
The present invention provides: a ceramic-loaded palladium catalyst which has excellent selective reduction properties and is applicable to flow synthesis; a method for producing this ceramic-loaded palladium catalyst; and a flow reactio...
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WO/2024/121949A1 |
Provided are: a ceramic-carried palladium catalyst which has excellent selective reduction performance and which can be used in flow synthesis; a method for producing same; and a flow reaction device including the ceramic-carried palladi...
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WO/2024/123527A1 |
A process for making a catalyst for oxidative esterification of methacrolein to methyl methacrylate comprises providing a support selected from an oxide of silicon, a carbide of silicon, a metal oxide, and a metal carbide. Particles of a...
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WO/2024/115859A1 |
The invention relates to an ester mixture obtained by esterification of at least a C2-C4 diol or a C3-C4 triol and an acid mixture containing at least a C2-C9 saturated acid and 10-undecenoic acid. The invention also relates to the use o...
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WO/2024/111489A1 |
A production method for a fluorine-containing compound wherein an organic compound having at least one atom or bond that can be fluorinated is fluorinated in an organic solvent into which fluorine gas has been introduced, the organic sol...
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WO/2024/112099A1 |
A recycled bis(4-hydroxybutyl)terephthalate according to an embodiment has a low residual amount of ethylene glycol derivatives, and thus, can be used as a polymerization raw material for high-crystallinity engineering polyester products...
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WO/2024/111488A1 |
Disclosed is a method for producing a fluorine-containing ester compound, the method comprising fluorination of an ester compound having at least one atom that can be fluorinated in a liquid that contains the ester compound, wherein: the...
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WO/2024/112938A1 |
The present disclosure pertains to improved methods of preparing high melting dicarboxylic acids or oxo-acids (e.g., carboxylic acid/aldehydes) by ozonolysis of their esters. For example, the present disclosure provides methods for prepa...
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WO/2024/110978A1 |
The present disclosure relates to a system (100) assembled for carrying out oligomerization of α-hydroxy acids comprising: a reaction vessel (101), distillation column (102), an inlet valve (103), reflux divider (104), condenser (105) a...
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WO/2024/109665A1 |
The present invention belongs to the field of biomedicines. Disclosed are carbamate-bond-containing lipid compounds and the use thereof. The lipid compounds are compounds of the following structure, the definition of each group being as ...
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WO/2024/111490A1 |
This method for producing fluorine-containing compounds comprises introducing, in a reactor having an inner surface inert to fluorine gas, a gas containing fluorine gas into a composition containing an organic compound having at least on...
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WO/2024/111491A1 |
A production method for a fluorine-containing compound wherein an organic compound having at least one atom that can be fluorinated is fluorinated in a liquid containing said organic compound to obtain a fluorine-containing compound that...
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WO/2024/105421A1 |
α,β-Unsaturated aldehydes are useful products as such in agrochemistry, but also potential intermediates for the preparation of important insect pheromones and kairomones. Until now, primarily the thermodynamically more stable (E)-α,Î...
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WO/2024/106164A1 |
The present invention addresses the problem of inhibiting the adhesion of impurities or (meth)acrylic acid ester polymer in the vicinity of filler in a rectification column.　This rectification column 10 includes a first portion 10A tha...
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WO/2024/106432A1 |
Provided is a method for producing a compound having a dicarboxylic acid derivative structure, the method comprising a reaction step in which olefin, alcohol, carbon monoxide, and oxygen are reacted in the presence of ammonium salt and a...
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WO/2024/099859A1 |
The present invention relates to a method for producing a C4-C12-alkyl(meth)acrylate, wherein in a first step a tetra-C4-C12-alkyl titanate is produced, which is subsequently used together with an isopropylate-coordinated titanium (IV) a...
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WO/2024/095104A1 |
A method of converting poly(ethylene terephthalate) to terephthalic acid includes a glycolysis step in which poly(ethylene terephthalate) is reacted with ethylene glycol in the presence of a specific catalyst, a hydrolysis step in which ...
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WO/2024/094564A1 |
The invention relates to picolyl ligands and their use in alkoxycarbonylation.
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WO/2024/095995A1 |
The purpose of the present invention is to provide: an ester-compound-containing composition that can be efficiently produced, and that has excellent storage stability; a method for producing the composition; and a polymerizable composit...
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WO/2024/095043A1 |
A process of producing high-purity C1-C2 alkyl acetates comprising introducing a feed stream comprising acetic acid, a C1-C2 aliphatic alcohol, and an acid catalyst to a reactive extraction column, contacting the feed stream with an extr...
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WO/2024/094637A1 |
The present invention relates to a process for the preparation of cyclobutenone derivatives of formula (1), wherein Y is O or NH, R is -C(O)-R1 or -S(0)2-R1, and R' is selected from optionally substituted linear or branched C1-12 alkyl, ...
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