- Synthetic method of propylene isopentoxy acetate perfume
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The invention discloses a synthetic method of propylene isopentoxy acetate perfume. According to the invention, a Williamson reaction is replaced, and ethyl diazoacetate and isoamyl alcohol are subjected to an O-H insertion reaction under the catalytic action of the catalyst Rh2(OAc)4 to synthesize propylene isopentoxy acetate, so reaction time is greatly shortened; in addition, the prepared solidacid catalyst Yb-MoO3/Al2O3-ZrO2 has the advantages easy separation from a liquid-phase reaction system, no corrosion to equipment and simple aftertreatment, overcomes the problems that conventionalliquid acid corrodes equipment and acid-containing wastewater pollutes environment, and also has high selectivity; the synthetic method can be carried out at low temperature, reduces energy consumption and side reactions, and greatly improves production efficiency; the yield of the prepared propylene isopentoxy acetate perfume is as high as 98.4%; the propylene isopentoxy acetate perfume has goodheat stability, small possibility of loss of active components and good repeated use performance, and is a novel green catalytic material with great application potential.
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Paragraph 0027; 0031-0033; 0034; 0038-0040; 0041; 0045-0047
(2019/12/11)
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- Allyl amyl glycolate preparation method
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The invention provides an allyl amyl glycolate preparation method, wherein specifically a reaction is performed by replacing the conventional allyl alcohol with vinyl chloride to prepare allyl amyl glycolate. According to the present invention, the method has advantages of simple operation, high yield, high purity, greatly reduced production cost, reduced waste generation and reduced environmentalhazard, wherein the excess vinyl chloride residue in the final product cannot be generated.
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Paragraph 0025; 0029; 0030; 0031
(2018/11/04)
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- ORTHOFORMIC ACID ESTERS AS PRO-FRAGRANCES
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The disclosure relates to special orthoformic acid esters of formula (I), as defined herein, which can be used as thermally labile and acid-labile fragrance storage substances. The disclosure further relates to detergents and cleaning agents, cosmetic agents and air freshening products containing such orthoformic acid esters, as well as to a method for lastingly fragrancing surfaces.
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