629-15-2Relevant academic research and scientific papers
PROCESS FOR PRODUCTION OF DIOL ESTERS FROM ESTERS OF MONO ALCOHOLS
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Paragraph 0047-0048, (2019/12/25)
Systems and methods of producing diol esters via coupling reactions are disclosed. A monohydric alcohol ester is used as the reactant in a coupling reaction to form a diol ester with or without the presence of a catalyst. Furthermore, the coupling reaction can be performed with or without mixing oxygen with the reactant. This method provides an additional or alternative pathway to produce diol esters other than direct esterification of diols.
Industrial method for preparing ethylene glycol diformate
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Paragraph 0015; 0016; 0017; 0020; 0021, (2018/05/16)
The invention relates to an industrial method for preparing ethylene glycol diformate (EGDF). The method comprises the following steps: completing esterification reaction of raw materials namely ethylene glycol and formic acid, in a composite solvent medium in the presence of an acid catalyst in an esterification reactor of a production device shown in drawings; and sequestially performing normalpressure desolventizing, reduced pressure low boiling removal and rectification treatment on esterification liquid, thereby obtaining the qualified EGDF. The ester content of the product is more thanor equal to 98%, the saponification value is 800-910mgKOH/g, and the product yield is more than 80%. Due to use of the composite solvent, the reaction temperature is decreased, and the reaction time is shortened. The distillation and rectification separation technology is utilized, and the esterification liquid after-treatment process is improved, so that the solvent and excessive formic acid canbe recycled. Therefore, the method disclosed by the invention has the advantages that the process is novel, the product quality is excellent, the yield is high, economic benefits are excellent, emission of three wastes is few and the method accords with the green chemical development direction.
Synthesis method of glycol diformate
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Paragraph 0027; 0028; 0029; 0030, (2017/10/11)
The invention relates to a synthesis method of glycol diformate. The synthesis method is characterized in that butyl chloroformate and ethylene glycol are taken as raw materials, glycol diformate is generated through ester exchange under the action of a high-performance catalyst, and a by-product is ethylene glycol monoformate, and thus the synthesis method solves a problem that a conventional catalyst is difficult to react and has low yield. The mass fraction yield of glycol diformate is above 90%; glycol diformate is mild in reaction condition and high in yield, has no corrosion and environmental pollution, and is easy to separate and purify the product; the separation and purification process is simple and low in energy consumption; in a reaction process, raw materials can be reused, so that a production cost is saved; besides, with mature production technologies and abundance and cheap price of raw material resources, the synthesis method is convenient to achieve extensive industrialization production in the future.
A glycol dimethyl ester synthesis process
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Paragraph 0022; 0023, (2016/10/07)
The invention relates to a method for preparing glycol diformate. The method comprises the following steps of (1) adding organic solvent, reactant glycol, 50% of formic acid aqueous solution (industrial formic acid) and an acid catalyst into a reactor and raising the temperature of a reaction system to divide water; and (2) collecting fraction with the temperature of 150-170 DEG C after a period of reaction time to obtain a glycol diformate product. The method is stable in reaction, safe, high in yield, low in cost, simple in process and easy to industrialize.
Saturation vapor pressures and vaporization enthalpies of esters of ethylene glycol and lower carboxylic acids
Maslakova,Krasnykh,Levanova
experimental part, p. 1695 - 1700 (2012/01/12)
Saturation vapor pressures and vaporization enthalpies of ethylene glycol and C1-C5 carboxylic acid disubstituted esters of normal and branched structures are determined by the transfer method in the tem-perature range of 295 to 327 K. Dependences of vaporization enthalpies versus the number of carbon atoms in a molecule and the retention indices are determined. An analysis of existing calculation schemes is given to help predict the vaporization enthalpy of the compounds under study.
Kinetics and mechanisms for the reactions of ozone with unsaturated oxygenated compounds
Al Mulla, Ismael,Viera, Lisa,Morris, Rebecca,Sidebottom, Howard,Treacy, Jack,Mellouki, Abdelwahid
experimental part, p. 4069 - 4078 (2011/09/30)
Rate coefficients for the reaction of ozone with a series of unsaturated oxygenated compounds are determined in air at atmospheric pressure and (298±3) K. Rate data are obtained using both relative and absolute rate techniques, and the measured rate coefficients are found to be in good agreement. The results show that the reactivity of the compounds with respect to addition of ozone to the double bond is a function of the nature of the oxygenated substituent. Product distribution studies on the reactions provide information on the decomposition pathways for the primary ozonides, and on the effect of the oxygenated group on the relative importance of the degradation pathways. The results are discussed in terms of their importance in the atmospheric oxidation of unsaturated oxygenated compounds.
Low energy light-triggered oxidative cleavage of olefins
Murthy, Rajesh S.,Bio, Moses,You, Youngjae
scheme or table, p. 1041 - 1044 (2009/05/27)
A series of substituted olefins were tested for their reactivity with singlet oxygen as a singlet oxygen-mediated cleavable linker. Low intensity light of 200 mW/cm2 was irradiated to the solution of an olefin and 5,10,15-triphenyl-20-(4-hydroxyphenyl)-21H,23H-porphyrin under atmospheric condition. Among the tested olefins, 1,2-cis-diphenoxyethylene reacted fast with singlet oxygen, >80% within 15 min yielding a stoichiometric conversion to aldehyde product without any side reactions.
Highly efficient formylation of alcohols, thiols and aniline derivatives by a heterogeneous (HCOOH/SiO2) system under microwave irradiation and solvent-free conditions
Ghorbani-Vaghei, Ramin,Veisi, Hojat,Amiri, Mostafa,Chegini, Mohammad,Karimi, Mehdi,Dadamahaleh, Somayeh Akbari,Sedrpoushan, Alireza
experimental part, p. 39 - 43 (2010/09/03)
A simple, rapid and efficient microwave-assisted procedure for the formylation of aniline derivatives and alcohols, using a heterogeneous (HCOOH/SiO2) system under solvent-free conditions is reported. The method is applied to a set of amines, alcohols and thiols and short reaction times (10 min) with high yields are reported. This protocol introduces a practical and viable green technology of solvent-free and catalyst-free reactions.
Compounds, Compositions and methods for insect control
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Page/Page column 12, (2008/06/13)
Rapidly acting compositions having vapor phase insecticidal activity comprise natural products or natural product-based materials. Further, these materials are non-petroleum based, are typically 100% biodegradable, and typically do not persist in the environment, unlike traditional pesticides. The compositions kill susceptible insects on contact in seconds, even the notoriously hardy peripleneta species. The compositions also kill insects behind cracks and crevices and when sprayed onto absorbent surfaces such as wood and plasterboard, where traditional contact insecticides work poorly or not at all. New methods of testing insecticides can be used to quantify these effects.
Azabicyclic-substituted fused-heteroaryl compounds for the treatment of disease
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, (2008/06/13)
The invention provides compounds of Formula I: wherein Azabicyclo is These compounds may be in the form of pharmaceutical salts or compositions, racemic mixtures, or pure enantiomers thereof. The compounds of Formula I are useful in pharmaceuticals in which α7 is known to be involved.
