- Ethylene glycol monobutyl ether benzoate and preparation method thereof
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The invention relates to a preparation method of ethylene glycol monobutyl ether benzoate. The ethylene glycol monobutyl ether benzoate is prepared from the raw materials of benzoic acid and ethylene glycol monobutyl ether at a molar ratio of 1:(1-5); the adding molar weight of a catalyst is 0.1-5% of the molar weight of the benzoic acid; quantitative benzoic acid, ethylene glycol monobutyl ether and catalyst are sequentially added into a tank reactor; the total volume of the materials accounts for 30-70% of the total volume of the tank reactor; the reactor is heated to 120-200 DEG C, and then a heat preservation reaction is carried out for 4-12 h; after the reaction is finished, the reactor is cooled to room temperature; the materials which complete the reaction and are cooled are subjected to vacuum rectification by passing through a plurality of rectifying towers in sequence, wherein the pressure in each rectifying tower is between minus 0.090 and minus 0.098 Mpa (G); an ethylene glycol monobutyl ether benzoate finished product is collected by the last rectifying tower in the entire rectification process. According to the ethylene glycol monobutyl ether benzoate and the preparation method thereof, the boiling point is high, no foreign smell exists, and the cost is low; the raw materials of the ethylene glycol monobutyl ether benzoate are simple, the preparation process is simple, the control is easy, the work efficiency is high, and the product quality is good.
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Paragraph 0015; 0020-0027
(2019/10/10)
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- A New Indirect Application of Aggregative Activation: Synthesis of Esters by Cobalt-Catalyzed Carbonylation of Aryl, Heterocyclic, and Vinyl Halides under Atmospheric Pressure
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Sun lamp illuminated alkoxycarbonylation of aryl, heteroaryl, and vinyl halides was performed under atmospheric pressure of CO in the presence of a cobalt catalyst in situ generated from Co(OAc)2.Illunination through a Pyrex flask was sufficient to catalyze the reaction.This process avoids the use of Co2(CO)8 and excess CH3I, which were required in the earlier procedure.A SRN1 mechanism is proposed.
- Marchal, Joel,Bodiguel, Jacques,Fort, Yves,Caubere, Paul
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p. 8336 - 8340
(2007/10/02)
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