- Method for catalyzing esterification reaction of low-carbon alcohol by using ionic liquid
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The invention discloses a method for catalyzing low-carbon alcohol esterification reaction by ionic liquid, which comprises the following steps: mixing dianhydride or diacid, fatty alcohol and ionic liquid, heating to 100-160 DEG C by microwave, and reacting for 0.5-2 hours to obtain diester; wherein the ionic liquid is [Ps2TMEDA] [HSO4] 2 and/or [Ps2BPy] [HSO4] 2, the molar ratio of the ionic liquid to the dianhydride or diacid is 0.005-0.04, and the molar ratio of the dianhydride or diacid to the fatty alcohol is 1-5. The method is simple in process, mild in condition, convenient to operate, environment-friendly, high in double esterification degree, high in ionic liquid activity and easy to separate.
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Paragraph 0049-0056
(2021/07/24)
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- Assisted Tandem Catalytic Conversion of Acrylates into Adipic Esters
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A ruthenium-catalyzed tail-to-tail dimerization of acrylates followed by hydrogenation results in the synthesis of adipic esters in one pot. An imine-ligated ruthenium complex that has good catalytic reactivity for tail-to-tail dimerization of methyl acrylate can be readily converted to a hydrogenation catalyst resulting in the assisted tandem catalytic conversion of methyl acrylate to methyl adipate.
- Maity, Pradip K.,Tunge, Jon A.
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p. 3419 - 3423
(2018/07/31)
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- SKIN EXTERNAL PREPARATIONS AND COSMETICS
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An object of the present invention is to provide skin external preparations and cosmetics which contain a branched acyl carnitine and have excellent formulation stability. A skin external preparation of the present invention includes a carnitine derivative represented by the following Formula (1) and/or a carnitine derivative salt represented by the following Formula (2), and an amphoteric surfactant. In Formula (1), R1 and R2 are each independently a C1-18 optionally branched, saturated or unsaturated aliphatic hydrocarbon group. In Formula (2), R1 and R2 are the same as in Formula (1), X? is a specific anion and Y+ is a specific cation.
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- Synergism of microwaves and immobilized enzyme catalysis in synthesis of adipic acid esters in nonaqueous media
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Low-energy microwave irradiation leads to enhancement by a factor of up to 2.63 in comparison with conventional heating in immobilized lipase-catalyzed esterification of adipic acid with various alcohols and this effect is due to the greater frequency of collision, without any change in activation energy of the two modes of heating. Copyright Taylor & Francis, Inc.
- Yadav, Ganapati D.,Lathi, Piyush S.
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p. 1699 - 1705
(2007/10/03)
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