64896-69-1Relevant academic research and scientific papers
Method for synthesizing isohexitol ester
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Paragraph 0010; 0043-0048; 0053-0054, (2021/05/05)
The invention discloses a method for synthesizing isohexitol ester, which is characterized in that a material containing hexitol and an esterifying agent is contacted with a solid acid catalyst in the presence of an aprotic solvent, and the isohexitol ester is obtained through one-pot one-step reaction. The method is especially suitable for the reaction of directly synthesizing the isohexitol ester, especially isosorbide ester, from hexitol, especially sorbitol, the total yield of the obtained isohexitol ester is 80% or above, and the yield of the isosorbide dicarboxylate reaches 60% or above.
Preparation method of dicarboxylic isosorbide
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Paragraph 0032, (2017/07/05)
The invention provides a preparation method of a dicarboxylic isosorbide. According to the preparation method, sorbitol is taken as a raw material, 0.5 to 48h of dehydration is carried out in the presence of a dehydration catalyst at N2 atmosphere at 100 to 180 DEG C, a monoprotic acid and an esterification catalyst are added, reaction temperature is increased to 185 to 250 DEG C for 0.5 to 48h of esterification, and reduced pressure distillation is carried out so as to obtain the dicarboxylic isosorbide product. The dicarboxylic isosorbide is a novel biomass-based plasticizer, can be used for replacing phthalic acid ester in production of polyvinyl chloride products such as agricultural plastic mulching film. Product yield of the preparation method is high; production separation is convenient; the preparation method is friendly to the environment; and application prospect is promising.
METHOD FOR MEASURING REACTION RATIO OF ISOSORBIDE ALKANOATE
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Paragraph 0081; 0082, (2017/06/02)
The present invention relates to a method to measure a reaction ratio of an isosorbide alkanoate which rapidly and easily measures the reaction ratio of an isosorbide alkanoate produced through an ester reaction using a proton nuclear magnetic resonance analysis; and easily optimizes production conditions when the isosorbide alkanoate is produced by the ester reaction. The method to measure the reaction ratio of the isosorbide alkanoate comprises: a step of determining peak A, B, C, and D by performing the proton nuclear magnetic resonance analysis of the isosorbide alkanoate; and a step of calculating the reaction ratio of an isosorbide hexanoate.COPYRIGHT KIPO 2016
Preparation method of dicarboxylic acid isosorbide ester plasticizer
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Paragraph 0024, (2017/05/13)
The invention provides a preparation method of a dicarboxylic acid isosorbide ester plasticizer. According to the method, isosorbide and monobasic acid serve as raw materials, and an esterification reaction is carried out for 0.5-48 h at the temperature of 65-250 DEG C under the catalytic effect. Dicarboxylic acid isosorbide ester is obtained through reduced pressure distillation. Dicarboxylic acid isosorbide ester is a non-toxic plasticizer, and can replace phthalic acid ester to be used for production of electric wire and cable sheaths, agricultural plastic mulching films and other polyvinyl chloride products. The product prepared through the method is high in yield, easy to separate and environmentally friendly, and has good application prospects.
Regioselective Acylation of 1,4:3,6-Dianhydro-D-glucitol
Stoss, Peter,Merrath, Peter,Schlueter, Guenther
, p. 174 - 176 (2007/10/02)
Acylation of 1,4:3,6-dianhydro-D-glucitol with anhydrides in the presence of heavy metal salts affords 5-endo-acylates with high regioselectivity, without detectable amounts of the isomeric 2-acylates.Acyl group migration occurs with preference for the 2-exo-position, on heating an acylation mixture, which contains varying amounts of 1,4:3,6-dianhydro-D-glucitol, 2- and 5-monoacylate and 2,5-diacylate, in the presence of reesterification catalysts and whilst distilling off the lower boiling 2-acylate.
