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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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WO/2024/014448A1 |
According to the present invention, in the presence of a hydrolysis catalyst, a fluorene-containing resin having a fluorene skeleton and an ester bond and/or a carbonic acid ester bond is reacted with carbonic acid ester to decompose the...
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WO/2023/193343A1 |
A catalyst for synthesizing dimethyl carbonate by means of methanol oxidative carbonylation and a preparation method for and an application of the catalyst. A carrier of the catalyst is a porous carbon-nitrogen material, and an active co...
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WO/2023/178991A1 |
Disclosed is a method for preparing energy-saving electronic-grade carbonate, comprising the following steps of: industrial-grade dimethyl carbonate and absolute ethyl alcohol entering a reaction process after being preheated by a prehea...
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WO/2023/168562A1 |
Provided is a carbonate-containing unsaturated compound having a structure as shown in formula (I) or formula (II). The symbols in formula (I) and formula (II) are as defined in the description. Therefore, a carbonate compound is used as...
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WO/2023/163026A1 |
The purpose of the present invention is to provide a bisphenol production method in which, using a highly-versatile catalyst, a polycarbonate resin is decomposed with a high level of reactivity to produce bisphenol.　Provided is a bisph...
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WO/2023/124348A1 |
The present invention relates to the technical field of chemical engineering, and in particular, to a linear carbonate and a preparation method therefor. The linear carbonate comprises one or more of compounds represented by structural f...
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WO/2023/101296A1 |
The present invention relates to a method for preparing a carbonate. The method for preparing a carbonate of the present invention can effectively prepare high-purity EMC and DEC with a high DMC conversion rate. The method of the present...
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WO/2023/101298A1 |
The present invention relates to a method for preparing a carbonate. The method for preparing a carbonate according to the present invention is capable of removing a catalyst applied in the preparation process with high efficiency, witho...
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WO/2023/096268A1 |
The present invention relates to a method for preparing a carbonate. According to the method according to the present invention, it is possible to increase the DMC conversion rate and EMC selectivity in a transesterification reaction of ...
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WO/2023/096263A1 |
The present invention relates to a method for producing a carbonate. The method of the present invention can safely remove a catalyst used in a carbonate production reaction. The method of the present invention can prevent defects that m...
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WO/2023/096332A1 |
The present invention relates to a method for preparing a carbonate. According to the method of the present invention, column plugging occurring in a preparing process of a carbonate, specifically, a purification process, can be suppressed.
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WO/2023/096301A1 |
The present invention provides: a method for preparing asymmetric linear carbonate comprising a step of preparing an asymmetric linear carbonate by transesterifying two different symmetric linear carbonates under a metal alkoxide catalys...
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WO/2023/093492A1 |
The present invention relates to a catalyst for a decarbonylation reaction, and a preparation method for the catalyst and a use thereof, and is used for preparing dialkyl carbonate from dialkyl oxalate by means of decarbonylation. The ca...
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WO/2023/068288A1 |
A method for producing diphenyl carbonate, comprising a first purification step, in which a diphenyl-carbonate-containing reaction mixture obtained by a specific step is continuously introduced into a high-boiling-point-substance separat...
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WO/2023/058851A1 |
The present invention provides a method for preparing an asymmetric linear carbonate, the method comprising a step of preparing an asymmetric linear carbonate by transesterification reaction of two different symmetric linear carbonates i...
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WO/2023/058681A1 |
A method for industrially producing a high-purity diaryl carbonate, the method comprising: a first refining step for continuously introducing a mixture containing a diaryl carbonate to a refining column A that has a side-cut discharge po...
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WO/2023/038266A1 |
The present invention relates to a monomer composition for synthesizing recycled plastic, a method for preparing same, recycled plastic using same, and a molded product, the monomer composition containing a high-purity aromatic diol comp...
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WO/2023/038270A1 |
The present invention relates to a monomer composition for synthesizing a recycled plastic, a method for manufacturing same, a recycled plastic using same, and a molded product, the monomer composition containing a high-purity aromatic d...
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WO/2023/038249A1 |
The present specification relates to a method for producing asymmetric linear carbonate.
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WO/2023/038269A1 |
The present invention relates to a monomer composition for synthesizing a recycled plastic, a method for preparing same, a recycled plastic using same, and a molded product, wherein the monomer composition contains a high-purity aromatic...
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WO/2023/038268A1 |
The present invention relates to a monomer composition for synthesizing a recycled plastic, a method for manufacturing same, a recycled plastic using same, and a molded product, the monomer composition containing a high-purity aromatic d...
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WO/2023/038267A1 |
The present invention relates to: a monomer composition for synthesis of recycled plastic containing a high-purity aromatic diol compound recovered through recycling by chemical decomposition of a polycarbonate-based resin; a method for ...
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WO/2023/038271A1 |
The present invention relates to: a monomer composition for synthesizing a recycled plastic, comprising an aromatic diol compound and having a color coordinate b* of 0.1-1; a preparation method therefor; and a recycled plastic and a mold...
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WO/2023/284031A1 |
A built-in instant dehydration micro-interface enhanced DMC preparation system and method. The system comprises a reaction tower (10), wherein the middle of the reaction tower (10) is provided with a sealing plate (50), a first reaction ...
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WO/2023/284030A1 |
An instant dewatering DMC preparation system and a preparation method. The system comprises a reactor (10); a partition plate (40) is provided in the middle of the reactor (10); a first reaction zone (30) is formed above the partition pl...
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WO/2023/284029A1 |
A system and method for preparing DMC. The system comprises a reaction tower; a middle part of the reaction tower is provided with a sealing plate, a lower part of the sealing plate is a reaction section, and an upper part thereof is a d...
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WO/2023/272472A1 |
The present application relates to an ibuprofen ester derivative and an emulsion formulation thereof. In the present application, a carboxyl group of racemic ibuprofen or S-ibuprofen is derivatized to obtain a compound N9 and a dextrorot...
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WO/2023/272781A1 |
Provided are a method for preparing adamantyltrimethylammonium hydroxide, and an aqueous quaternary ammonium base solution prepared thereby, relating to the technical field of molecular sieve template agent production. The preparation me...
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WO/2022/230776A1 |
The present invention provides a method for manufacturing a dialkyl carbonate including two separation and purification steps (I) and (II). In step (I), the dialkyl carbonate concentration in a mixture (AT) is 25.00-95.00 mass% and the c...
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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/2022/186162A1 |
The purpose of the present invention is to provide a method for producing a nucleophilic reaction product, the method being capable of using a halogenated carbonyl compound for the reaction without requiring isolation thereof, while bein...
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WO/2022/172744A1 |
The purpose of the present invention is to provide an efficient method of producing a carbonyl halide for a halogenated methane used. A method for producing a carbonyl halide according to the present invention is characterized by compris...
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WO/2022/172745A1 |
The purpose of the present invention is to provide a method for producing a halogenated carbonyl efficiently in regard to the used halogenated hydrocarbons. The method for producing a halogenated carbonyl according to the present inventi...
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WO/2022/149357A1 |
The purpose of the present invention is to provide a specific method whereby it is possible to use a cyclic carbonate and an aliphatic monohydric alcohol as starting materials to industrially produce dialkyl carbonates and diols with hig...
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WO/2022/113847A1 |
Provided is a polycarbonate resin decomposition method by which a polycarbonate resin can be decomposed with high reactivity even under mild and low-environmental-load conditions. Moreover, provided is an alkyl aryl carbonate production ...
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WO/2022/092176A1 |
Provided is a production method for a bisphenol or the like by using a chemical recycling method that is moderate, has a small environmental load, and enables efficient degradation of a polycarbonate resin. Provided is a method for produ...
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WO/2022/065133A1 |
The purpose of the present invention is to provide a method by which a carbonate compound can be produced safely and efficiently without using chloroform. This method for producing a carbonate compound is characterized: by including a st...
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WO/2022/033202A1 |
Provided in the present application is an ibuprofen ester prodrug as represented by structural formula (1), a racemate, a stereoisomer, a pharmaceutically acceptable salt or a solvate thereof, or a solvate of the pharmaceutically accepta...
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WO/2021/255052A1 |
An in-situ method for making a conjugated diene from an allyl alcohol comprising the conversion of the allyl alcohol to an allyl carbonate, allyl ester or allyl formate with concomitant or subsequent conversion of the allyl carbonate, al...
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WO/2021/230151A1 |
The purpose of the present invention is to provide a method for efficiently manufacturing high-quality polyurethane. This method for manufacturing polyurethane is characterized by including: a step in which a specific fluorocarbonate com...
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WO/2021/125989A1 |
Disclosed is a high yield, high selectivity and high conversion method to produce Dimethyl Carbonate (DMC) from carbon dioxide (CO2) and methanol (MeOH) using optimized concentration of ethylene oxide as water scavenger. The method provi...
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WO/2021/114092A1 |
Disclosed is a method for preparing dimethyl carbonate, comprising the following steps: contacting a raw material containing ethylene carbonate and methanol with a catalyst, and reacting to obtain the dimethyl carbonate. The catalyst com...
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WO/2021/114091A1 |
The present application discloses a homogeneous catalyst. The homogeneous catalyst comprises an ionic liquid comprising anions and cations; wherein the anion and the cation both contain a nitrogen-containing heterocycle, the cation has a...
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WO/2021/110627A1 |
The invention relates to a process for removing an ether alkanol impurity from a stream containing an organic carbonate and the ether alkanol impurity, comprising contacting the stream with an extraction solvent and separating the extrac...
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WO/2021/106372A1 |
The present invention pertains to a method for recovering palladium metal and/or a palladium compound that had eluted from a solid catalyst in a dialkyl carbonate production device through a simple operation that is highly economical and...
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WO/2021/093854A1 |
A method for preparing battery-grade methyl ethyl carbonate, comprising a reactive rectifying column (100), a reactive rectifying column reboiler (101), a first compressor (201), a removal column (200), a product rectifying column (300),...
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WO/2021/063853A1 |
The invention relates to a process wherein a dialkyl carbonate stream containing an ether alkanol impurity is subjected to extractive distillation using an extraction solvent to obtain a top stream comprising dialkyl carbonate and a bott...
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WO/2021/047050A1 |
The present invention provides an enhanced carbonylation reaction system and process, and relates to the technical field of carbonylation preparation of carbonyl compounds such as aldehyde and ketone. The enhanced carbonylation reaction ...
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WO/2021/045105A1 |
The purpose of the present invention is to provide a method for safely and efficiently producing a carbonyl halide even when visible light is mainly used. A method for producing a carbonyl halide according to the present invention is cha...
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