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WO/2021/038637A1 |
Provided are: a novel vitamin A derivative which is useful as a medicinal drug and a cosmetic and which comprises a compound represented by formula (I) or formula (II) (in the formulae, R1 and R2 each independently denote a hydrogen atom...
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WO/2021/035282A1 |
The present disclosure relates to the field of chemical compounds, compositions and processes. More specifically, the present disclosure relates to compositions having a high-loading capacity in an aqueous medium and to compositions, pro...
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WO/2021/039558A1 |
The present invention addresses the problem of providing: a phenolic resin which has excellent flowability and gives cured objects having an excellent balance among high-temperature modulus, low hygroscopicity, and dielectric properties ...
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WO/2021/037660A1 |
The present invention relates to a process for preparing methylmethacrylate by direct oxidative esterification of methacrolein. Methylmethacrylate is used in large amounts with other polymerizable compounds for preparing polymers and cop...
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WO/2021/040267A1 |
The present invention relates to a method of extracting caffeic acid and rosmarinic acid from rosemary, and more specifically, to a method of extracting caffeic acid and rosmarinic acid from rosemary, the method comprising the steps of: ...
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WO/2021/032673A1 |
The present application relates to a compound of the following formula (I), in which: - R1, R2, R3 and R4 represent, independently of each other, H or a (Ci-C30) alkyl group, the total sum of the number of carbon atoms of R1, R2, R3 and ...
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WO/2021/032675A2 |
The present invention relates to a compound of the following formula (I): in which: - R1, R2, R3 and R4 are, independently of one another, H or a (C1-C30)alkyl group, the total sum of the number of carbon atoms of R1, R2, R3 and R4 being...
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WO/2021/031193A1 |
Provided is a modified mordenite molecular sieve and a preparation method therefor. When the number of acid sites of a twelve-membered ring in the modified mordenite molecular sieve is less than or equal to 0.2 mmol/g, the number of acid...
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WO/2021/031246A1 |
The present application discloses a method for preparing a chiral β-hydroxylcarboxylate compound, involving firstly dissolving a dichlorophenyl ruthenium dimer, a ligand and an alkaline additive in a solvent under the protection of an i...
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WO/2021/032821A1 |
Method for depolymerising terephthalate polymer into reusable raw material, the method comprising steps of: depolymerizing terephthalate polymer by using ethylene glycol into a depolymerised mixture comprising at least one monomer and at...
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WO/2021/031168A1 |
Provided is a continuous synthesis method for a 2-fluoromalonic acid diester compound. The method comprises: using (I) as a raw material, and carrying out continuous decarbonylation reaction in a continuous reaction device to obtain 2-fl...
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WO/2021/032826A1 |
The invention relates to a solid composition comprising at least 90.0 wt.% bis(2-hydroxyethyl) terephthalate (BHET), as based on dry weight and having a pore volume in the range of 0.20 to 1.0 cm3/g. The porosity is above 25% or even abo...
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WO/2021/029395A1 |
A compound which has one or more halogen atoms and an unsaturated double bond. A method for producing an iodine-containing vinyl monomer, said method comprising: (a) a step for preparing an iodine-containing alcoholic substrate having a ...
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WO/2021/024135A1 |
The present invention relates to an improved processses for synthesizing preparing substituted cyanophenoxy-pyrimidinyloxy-phenyl acrylate derivatives. The present invention specifically relates to an improved process for the preparation...
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WO/2021/026159A1 |
Purification methods and systems for working up a crude vinyl acetate stream containing vinyl acetate monomer, acetic acid, water, ethyl acetate, and other impurities. Crude vinyl acetate streams are purified with an azeotropic distillat...
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WO/2021/019224A1 |
The invention discloses a catalyst comprising a silica support, a modifier metal and a catalytic alkali metal. The silica support has a multimodal pore size distribution comprising a mesoporous pore size distribution having an average po...
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WO/2021/014988A1 |
[Problem] To provide a method for producing an α-acyloxy carboxylic acid ester, said method being efficient and excellently economical. [Solution] A method for producing an α-acyloxy carboxylic acid ester represented by formula (1), wh...
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WO/2021/009366A1 |
The invention discloses the use of a short path evaporator for decolorization of colorized acetoacetylated ethylene glycol.
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WO/2021/009627A1 |
Disclosed are processes for producing ethylene. The processes can include contacting a first stream containing methane with an oxidant and oxidizing at least a portion of the methane under conditions suitable to produce a second stream c...
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WO/2021/009002A1 |
The present invention concerns new stable compositions of 1-Z-bromoalk-1-ene compounds of general formula (A). These compositions are characterized in that they also comprise either at least one cyclic ether compound comprising between 4...
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WO/2021/010363A1 |
The present invention addresses the problem of providing a novel method for producing binaphthyls, said method having good reaction efficiency and being capable of easily removing an inorganic salt. The present invention provides, as a m...
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WO/2021/004947A1 |
The invention discloses a method for preparation of acetoacetate ester compounds with amino alcohol catalysts which are themselves diketenized in the course of the diketenization reaction; and subsequent polymerization of these acetoacet...
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WO/2021/004070A1 |
The invention relates to a recovery method for a waste polyester material, in particular to a method for preparing dimethyl terephthalate (DMT) by recycling using a chemical method, belonging to the technical field of recovering waste po...
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WO/2021/004719A1 |
The present invention relates to a novel process for producing methacrylates, such as methacrylic acid and/or alkyl methacrylates, in particular MMA. The present invention relates, in particular, to an increase in yield and efficiency of...
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WO/2021/004069A1 |
The present invention relates to the technical field of waste polyester recycling, and relates to a method for recycling a waste polyester material, in particular to a method for preparing dimethyl terephthalate (DMT) by recycling waste ...
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WO/2021/002708A1 |
The present invention relates to a preparation system and preparation method for a diester-based composition, in which a first alcohol, which is a raw material for reaction, is added as an extraction agent to waste water, which is layer-...
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WO/2021/002705A1 |
The present invention relates to a continuous preparation system, and to a diester-based material preparation unit included therein, comprising: a reaction device for esterifying a dicarboxylic acid and a primary alcohol; a column for pe...
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WO/2021/002406A1 |
The purpose of the present invention is to provide a phthalic acid ester composition which exhibits good balance among various properties if used as a plasticizer in place of DOP, while having excellent hydrolysis resistance, and which i...
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WO/2021/002700A1 |
The present invention relates to a method for continuously preparing a diester-based material comprising a reaction part in which all N reaction units from a first reaction unit to an N-th reaction unit are connected to each other in ser...
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WO/2021/002407A1 |
Provided is a novel production method by which a fluoroalkyl group-containing compound can be efficiently synthesized. This method is for producing a compound represented by general formula (3) (Rf represents a C1-30 alkyl group substi...
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WO/2021/002707A1 |
The present invention relates to a heat exchange system, which allows heat exchange between different streams included in a system for continuously preparing a diester-based composition, thereby enabling a reduction in the energy to be c...
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WO/2021/002702A1 |
The present invention relates to a diester-based material manufacturing unit characterized by including: a reaction device in which an esterification reaction of a dicarboxylic acid and a primary alcohol is performed; a column in which g...
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WO/2021/000318A1 |
A process for purifying (i) a hydrophilic organic solvent, (ii) a hydrolysable organic solvent, or (iii) a mixture of a hydrophilic organic solvent and a hydrolysable organic solvent by removing ionic contaminants from the hydrophilic or...
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WO/2020/261720A1 |
A method for producing methyl methacrylate, the method including a distillation step which includes: supplying a liquid reaction mixture obtained by causing methacrolein, methanol, and molecular oxygen to undergo oxidative esterification...
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WO/2020/261974A1 |
Provided is a novel optically active bisphosphine methane that is useful as a ligand for an asymmetric catalyst, has excellent oxidation resistance in the air, and is easy to handle. Also, provided is a transition metal complex using, as...
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WO/2020/257571A1 |
The invention provides methods of preparing 8-hy droxy-2,2, 14,14- tetramethylpentadecanedioic acid and methods of making a pharmaceutical material comprising a purified amount of 8-hy droxy-2,2, 14, 14-tetramethylpentadecanedioic acid. ...
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WO/2020/254460A1 |
The invention relates to a method for producing glycerol mono(meth) acrylate from 2,2-dimethyl-l,3-dioxolan-4-ylmethyl (meth)acrylate by acidic silica catalysed reaction with methanol.
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WO/2020/249198A1 |
The invention relates to a process for preparing polyol esters, in particular polyglycerol esters, of acyl-capped or acyl-blocked 3-hydroxybutyric acid and to the products obtainable in this way and the functionalized (e.g. esterified) d...
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WO/2020/249794A1 |
The present invention relates to novel fragrance compounds derived from campholenic aldehyde according to general Formula (II) or from the cyclopropanated campholenic aldehyde according to general Formula (III), or to compositions compri...
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WO/2020/249197A1 |
The invention relates to a process for preparing optionally functionalized acyl-capped (acyl-blocked) 3-hydroxybutyric acids and their salts and esters and to the products obtainable by this process and their use.
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WO/2020/249196A1 |
The invention relates to a method for producing, optionally functionalised, preferably fatty acid functionalised polyol esters, particularly polyglycerol esters, of 3-hydroxy butyric acid, and to products obtained in this way, and to the...
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WO/2020/249222A1 |
The present invention relates to novel fragrance compounds derived from campholenic aldehyde according to general Formula (II) or from the cyclopropanated campholenic aldehyde according to general Formula (III), or to compositions compri...
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WO/2020/249195A1 |
The invention relates to a method for producing polyol esters, particularly polyglycerol esters, of oxobutyric acid, to products obtained in this way, and to the use of same.
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WO/2020/245724A1 |
The multifunctional compound is represented by formula X-C(R)RF-Y, in which X and Y are each independently -C(O)-O-M, -C(O)-HAL, -C(O)-NR1 2, -C≡N, -C(O)NR1-SO2-Rf 1-W, or a fluorinated alkenyl group that is optionally interrupted by o...
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WO/2020/239750A1 |
The invention relates to the use of a specific type of calcium catalyst (C) for the preparation of alkoxylated glycerol esters, alkoxylated glycerol esters prepared in the presence of the catalyst and a process for the preparation of the...
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WO/2020/238189A1 |
Disclosed is a preparation method of an antioxidant 3,5-methyl ester, comprising the following steps: preparation of a catalyst and preparation of the antioxidant 3,5-methyl ester. Using methyl 3-(4-hydroxyphenyl)propionate as raw materi...
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WO/2020/241720A1 |
The present invention provides: a method which is capable of suppressing polymerization of methacrylic acid even if the methacrylic acid is in the coexistence of an extraction solvent such as xylene; and a method for producing a methacry...
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WO/2020/238559A1 |
Disclosed are a de-C2-symmetric diphenylamine-type chiral bisoxazoline ligand as shown in formula 3, a synthesis method therefor and the use thereof in an asymmetric catalytic reaction. The C2-symmetry of the ligand is removed by introdu...
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WO/2020/237378A1 |
The present disclosure relates to compounds of the formula (I) which are precursor compounds of esters, whereby upon hydrolysis of the precursor compound, an ester compound is released. This ester precursor approach can be useful for app...
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WO/2020/234128A1 |
The invention concerns a process for preparing an aldol ester of the formula (I), characterized in that at least one carboxylic anhydride of the formula (II) is reacted with at least one aldol of the formula (III) with heating in the pre...
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