- Polymer-supported titanate as catalyst for the transesterification of acrylic monomers
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Transesterification of (meth)acrylic esters catalysed by alkyl titanates is an important industrial reaction. The current processes are homogeneous but heterogeneous alternatives are attractive for cost and environmental reasons. We have developed a straightforward and cost-effective synthesis of a polymer-supported titanium alkoxide catalyst involving cheap, readily available and relatively non-toxic chemicals, solvents and workup procedures. Efficiency and stability of the catalyst were tested in a laboratory-scale continuous flow reactor under equilibrium conditions for the preparation of N,N- dimethylaminoethylacrylate, a chemical of industrial interest. The results obtained indicate a good stability of the system to metal leaching on the long term.
- Alvs, Marie-Hélne,Riondel, Alain,Paul, Jean-Michel,Birot, Marc,Deleuze, Hervé
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- NEW DIALKYL TIN OXIDE COMPOSITION AND PROCESS FOR PRODUCING 2-DIMETHYLAMINOETHYL (METH)ACRYLATE
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The invention relates to a new dialkyl tin oxide catalyst composition and its use for the synthesis of amino alkyl (meth)acrylates by transesterification from an alkyl (meth)acrylates and an amino alcohol, and especially 2-dimethylaminoethyl (meth)acrylate. The invention also relates to polymers made with quaternized amino alkyl (meth)acrylates and use of said polymers in water treatment, sludge dewatering, papermaking process, agriculture, cosmetic and detergency composition, textile process, oil and gas recovery process such as enhanced oil recovery, fracturing, mining operation such as tailings treatment.
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Paragraph 0077-0079
(2021/10/11)
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- METHOD FOR PRODUCING 2-DIMETHYLAMINOETHYL (METH)ACRYLATE
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Process for the production of 2-dimethylaminoethyl (meth)acrylate in multiple stage batch reactions involving the recycling of the catalyst (DBTO) in subsequent reaction, the addition a certain amount of fresh catalyst to the recycled catalyst, the use of said catalysts in the subsequent reaction, and wherein the volume decrease due to azeotropic distillation is compensate in order to keep the volume constant in the reactor during the reaction by the continuous addition of a composition comprising methyl(meth)acrylate and dimethylaminoethanol.
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Page/Page column 0053-0067
(2021/04/23)
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- PROCESS FOR PRODUCING (METH)ACRYLIC ESTERS
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This invention relates to a process for the continuous production of a (meth)acrylic ester by transesterification reaction between a C1-C4 light alkyl (meth)acrylate, with a heavy alcohol in the presence of a catalyst, characterised in that the flows feeding the reactor are introduced through a static mixer placed on a recirculation loop of the reactor. The use of a static mixer improves the selectivity of the reaction and consequently the overall productivity of (meth)acrylic ester synthesis process.
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Paragraph 0077-0086
(2020/04/09)
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- Facile Light-Mediated Preparation of Small Polymer-Coated Palladium-Nanoparticles and Their Application as Catalysts for Alkyne Semi-Hydrogenation
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A facile light-mediated preparation of small palladium nanoparticles (PdNPs) with a diameter of 1.3 nm and low dispersity by using low-priced and readily prepared photoactive polymers is presented. These polymers act as reagents for the photochemical reduction of Pd ions and they are also stabilizers for the PdNPs generated in situ. The PdNP–polymer hybrid materials prepared by this reliable approach are efficient hydrogenation catalysts that show high activity and Z-selectivity in the semi-hydrogenation of alkynes. These PdNP–catalyst hybrid materials can be readily recycled and reused up to five times.
- M?sing, Florian,Wang, Xi,Nüsse, Harald,Klingauf, Jürgen,Studer, Armido
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supporting information
p. 6014 - 6018
(2017/05/05)
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- A compound having acryl group as an absorber, method for preparation thereof, and solar cell comprising the same
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The present invention relates to a compound which can be used as an absorber of a solar cell, a production method thereof, and a solar cell comprising the same. The compound according to the present invention form a bonding structure between acrylic groups through heat treatment by introducing the acrylic groups to an organic cation in a perovskite structure, thereby suppressing structural collapse of the perovskite to enhance stability against light, moisture and heat.COPYRIGHT KIPO 2017
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Paragraph 0102; 0103; 0104
(2017/11/23)
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- Organic monomer for synthesizing amphoteric polycarboxylic superplasticizer and preparation method
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The invention discloses an organic monomer for synthesizing an amphoteric polycarboxylic superplasticizer, which has a molecular structure shown in the description. The invention further discloses a preparation method of the organic monomer for synthesizing the amphoteric polycarboxylic superplasticizer and comprises the following steps: preparing a dimethylaminoethyl acrylate intermediate and a cationic active organic monomer; adopting one-time charging at the normal temperature; and selecting a reasonable type of catalyst to prepare the organic monomer. The method has reduced cost, plays an important part in process simplification, and has characteristics of high reaction conversion rate, high yield, and high purity. Compared with an anionic polycarboxylic superplasticizer sold in the market, under a condition of a relatively low mixing amount, the amphoteric polycarboxylic superplasticizer enables neat cement paste or concrete to have excellent performance of good water reduction, high dispersion, good plasticity preservation, and high early-stage compressive strength.
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Paragraph 0022; 0023; 0024; 0025; 0026
(2016/11/21)
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- Method of manufacturing DMAEA and Apparatus therefor
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The present invention relates to a method and an apparatus for producing dimethylaminoethyl acrylate (DMAEA). According to the present invention, the method for producing DMAEA comprises the following steps: preparing a column-type reactor; and supplying acrylate and dimethylaminoethanol (DMAE) to the reactor, wherein the DMAE and acrylate are supplied to the reactor through an additional stream, and the DMAE is supplied from an upper part than a portion where acrylate is supplied from.COPYRIGHT KIPO 2016
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Paragraph 0043-0045
(2017/07/11)
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- METHOD FOR PRODUCING DIMETHYLAMINOETHYL ACRYLATE AND QUATERNARY SALT THEREOF
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PROBLEM TO BE SOLVED: To provide a method for producing dimethylamino acrylate and dimethylamino acrylate quaternary salt, in which the method does not have adverse effect on a polymer obtained by polymerizing dimethylaminoethyl acrylate or dimethylaminoethyl acrylate quaternary salt by controlling the content of vinyl oxyethyl acrylate that is an impurity present in dimethylaminoethyl acrylate and dimethylaminoethyl acrylate quaternary salt. SOLUTION: A method for producing dimethylaminoethyl acrylate comprises transesterification between an alkyl acrylate and dimethylaminoethyl alcohol containing 20 ppm or less of vinyloxy ethanol in the presence of a catalyst. SELECTED DRAWING: None COPYRIGHT: (C)2016,JPOandINPIT
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Paragraph 0029; 0030; 0031
(2018/10/16)
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- PROCESS FOR PREPARING 4-HYDROXYBUTYL ACRYLATE
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A process for preparing 4-hydroxybutyl acrylate by transesterifying an alkyl acrylate with 1,4-butanediol in the presence of a dialkyltin oxide such that each of the alkyl groups has 4 to 8 carbon atoms, characterized in that the amount of the dialkyltin oxide is adjusted to 0.00001 to 0.01 moles per one mole of the alkyl acrylate.
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Paragraph 0615; 0616; 0617; 0618; 0619
(2015/04/22)
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- Reaction of methyl acrylate with N,N-dimethylethanolamine in the presence of a titanium alkoxide
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The kinetic features were examined for transesterifi cation of methyl acrylate with N,N-dimethylethanolamine in the presence of tetra(N,N- dimethylaminoethyl) titanate at different molar ratios of the reactants and at temperatures within 50-80 C, as well as for side reactions of Michael addition at 95-125 C. The major parameters governing the selectivity of the synthesis of N,N-dimethylaminoethyl acrylate were determined.
- Demidov,Lavrent'Ev,Potekhin
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p. 1676 - 1680
(2013/04/10)
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- COMPOSITION INCLUDING DIALKYL TIN OXIDE AND USE THEREOF AS A TRANSESTERIFICATION CATALYST FOR THE SYNTHESIS OF (METH) ACRYLIC ESTERS
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The present invention relates to a composition including a dialkyl tin oxide, such as DBTO, which can be used as a transesterification catalyst for the synthesis of (meth)acrylic esters. The invention also relates to a method for the synthesis of (meth)acrylic esters by transesterification in the presence of said composition.
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Page/Page column 4
(2012/05/21)
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- METHOD FOR THE SYNTHESIS OF (METH)ACRYLIC ESTERS CATALYSED BY A POLYOL TITANATE
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The subject of the invention is a method for the synthesis of (meth)acrylic esters by transesterification in the presence of a catalyst corresponding to the formula [(R′O)3TiO]xR″ in which R′ is a linear or branched alkyl radical having from 2 to 8 carbon atoms which may contain heteroatoms or R′ is a phenyl radical, R′ is a polyfunctional radical, originating from a polyol R′(OH)x comprising x alcohol functional groups and x is an integer ranging from 2 to 6. The method according to the invention is particularly well suited to the synthesis of dialkylaminoalkyl (meth)acrylates from methyl (meth)acrylate and a dialkylaminoalcohol.
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Page/Page column 3
(2010/06/19)
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- THE PRODUCTION OF N,N-DIALKYLAMINOETHYL (METH)ACRYLATES
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A method and apparatus for preparing a N,N-dialkylaminoalkyl acrylate in a continuous transesterification reaction. The reaction involves adding alkyl acrylates such as methacrylate or ethacrylate to a reboiler mechanism and efficiently removing alcohol co-products. Because the reaction is continuous, the alkyl acrylates can be added as needed to increase output, decrease output, or fine-tune the reaction dynamics. An entrainer is used to form a volatile azeotrope which contains both alcohol and entrainer and which is easily removed from the reboiler mechanism. This method reduces the amount of entrainer needed per unit of alkyl acrylate used and eliminates any need to purify the end product from entrainer contamination of the resulting N,N-dialkylaminoalkyl acrylate product.
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Page/Page column 8; 9
(2010/12/18)
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- Method for Preparing (Meth) Acrylic Esters or Anhydrides
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The invention concerns a method for preparing (meth)acrylic esters or anhydrides from acrylic acid of formulae (I), where R is H or Me, and R′ is alkyl and R″ is alkyl or ethyl substituted by dialkylamino whereof the alkyls can form with the nitrogen atom, a 5- or 6-membered heterocycle, capable of bearing one or several alkyl substituents. OII or ═O, or R′ is H and R″ is alkyl, the alcohol R″—OH being primary or secondary; or (II) wherein R′ is H or Me, functioning preferably in the presence of at least one catalyst, wherein is performed a reaction in a reaction R2 with constant equilibrium displacement provided with a first reactor R1 designed for prior dehydration of the reagents to be involved in the reaction.
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Page/Page column 3
(2008/12/06)
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- MANUFACTURE OF ESTERS
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The invention relates to a process in which a compound R1COOR3 (I) is made by a transesterification reaction of an ester compound R1COOR2 (II) with an alcohol R3OH (III) in the presence of a transesterification catalyst, wherein R1 is H or C1-4 alkyl or CH2=CR4-; R2 is C1-4 alkyl; R3 is selected from the group consisting of alkyl having at least 4 carbon atoms, cycloalkyl having at least 5 carbon atoms, aryl, aralkyl, alkaryl and amino alkyl; and R4 is -H or - C1-4 alkyl, wherein alcohol R2OH (IV) is formed as a byproduct and in which said byproduct (IV) is removed by distillation in the presence of an entrainer, in which the entrainer is a compound that suppresses the formation of an azeotrope between compound (II) and byproduct (IV). The process can be useful in the preparation of esters such as dimethyl amino ethyl (meth) acrylate. The invention also provides a method of separating alcohols and esters. In a further form of the invention a process of preparing esters by a transesterification process is provided in which the transesterification catalyst is homogenous.
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Page/Page column 18-21
(2008/06/13)
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- PROCESS FOR THE PRODUCTION OF N-ALKYLAMINOALKYL (METH)ACRYLATES
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The present invention is to provide a method of producing an N-alkylaminoalkyl (meth)acrylate containing a small amount of low boiling components, especially, containing a small amount of raw components, without any complicated operations or special apparatuses. The method of producing an N-alkylaminoalkyl (meth)acrylate comprising the steps of: (A) performing the reaction between the (meth)acrylic acid ester and the N-alkylaminoalkyl alcohol in a presence of a catalyst to obtain a reaction solution containing the N-alkylaminoalkyl (meth)acrylate; (B) distilling out components which have lower boiling points than the N-alkylaminoalkyl (meth)acrylate from the reaction solution obtained by the step (A); and (C) distilling the N-alkylaminoalkyl (meth)acrylate; and further comprising the step of: (D) adjusting water concentration at a range from 0.01 to 1 wt%. in the reaction solution which is located after the step (A) and before the step (C).
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Page/Page column 7; 8
(2008/06/13)
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- The 'Baylis - Hillman reaction' mechanism and applications revisited
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It is shown that reaction of aryl, benzyl, alkyl and functionalised alkyl acrylic esters with benzaldehyde, in the presence of 1,4-diazabicyclo[2.2.2] octane, strongly depends upon the electronic and steric effects of the ester part. This influence is also observed in condensation of furfuraldehyde. Moreover, for the first time, it is shown that the overall condensation is equilibrated.
- Fort, Yves,Berthe, Marie Christine,Caubere, Paul
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p. 6371 - 6384
(2007/10/02)
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- Process for the manufacture of dialkylaminoalkyl (meth)acrylates
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Process for the manufacture of dialkylaminoalkyl (meth)acrylates (I) of formula: R1 being a hydrogen atom or a methyl radical, A being a linear or branched alkyl radical containing 1 to 5 carbon atoms, and R2 and R3, which are identical or different from each other, are an alkyl radical containing 1 to 5 carbon atoms, or an aryl group, or R2 and R3 form a cyclic alkyl radical, in which ethyl (meth)acrylate is reacted with an aminoalcohol (II) of formula (R3)(R2)N-A-OH, A being a linear or branched alkyl radical containing 1 to 5 carbon atoms, in the presence of a polymerization inhibitor, at a temperature of between 20° and 120° C. and at a pressure equal to or lower than atmospheric pressure, in a molar ratio of ethyl (meth)acrylate to aminoalcohol (II) of between 1.5 and 5, in the presence of tetraethyl titanate, the azeotropic mixture of ethyl (meth)acrylate and ethanol is removed during the reaction, and the dialkylaminoalkyl (meth)acrylate (I) obtained is isolated at the end of reaction.
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