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Method used for preparing acetylpropionic acid based on catalysis of furan with acid catalyst

An acidic catalyst and levulinic acid technology, which is applied in the preparation of carboxylate, chemical instruments and methods, and the preparation of organic compounds, etc., can solve the problems of complicated levulinic acid process, low conversion rate, and difficult disposal of waste liquid to pollute the environment. , to achieve the effect of overcoming the complicated preparation process, low cost and improving yield

Inactive Publication Date: 2017-10-13
UNIV OF JINAN
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Problems solved by technology

[0004] The present invention aims to solve the problems in the prior art that the preparation process of levulinic acid is complicated, the conversion rate is low, and the waste liquid is difficult to treat and pollute the environment. High yield, strong continuity, few reaction steps, short reaction time, etc., are very suitable for commercial production

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  • Method used for preparing acetylpropionic acid based on catalysis of furan with acid catalyst
  • Method used for preparing acetylpropionic acid based on catalysis of furan with acid catalyst
  • Method used for preparing acetylpropionic acid based on catalysis of furan with acid catalyst

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Embodiment 1

[0026] Embodiment 1, the present invention: the method for preparing levulinic acid by catalyzing furan with dimethyl sulfoxide as solvent, comprises the following steps:

[0027] (1) Uniform mixing: the acidic catalyst quality is 5g, the furan quality is 5g, and the volume of dimethyl sulfoxide solvent is 50mL and mixed in the reaction kettle, and the raw materials are uniformly mixed by stirring, the stirring speed is 400rpm, and the stirring time For 20min; the acidic catalyst is an acidic macroporous resin, the acidic macroporous resin is a Bronsted acid catalyst macroporous resin, and the particle diameter of the acidic macroporous resin is 0.121~0.989mm;

[0028] (2) Air exhaust: after the mixture was added to the reactor, high-purity nitrogen was used to get rid of the air in the autoclave;

[0029] (3) Heating: put the mixture obtained by stirring into an autoclave reactor to heat and react, the reaction temperature is 200°C, the heating rate is 20°C / min, and the heat ...

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Abstract

The invention discloses a method used for preparing acetylpropionic acid based on catalysis of furan with an acid catalyst. The method comprises following steps: furan, an acidic macroporous resin, and a dimethyl sulfoxide solvent are mixed; and air removing, heating, cooling, washing, separating, and drying are carried out. According to the method, dimethyl sulfoxide is selected as the solvent in preparation of acetylpropionic acid via catalysis of furan, so that polymerization of furan is inhibited effectively, the yield of acetylpropionic acid is increased to be 60% or higher; continuity is high; reaction steps are few; reaction time is short; the method is especially suitable for commercialization production; the acidic macroporous resin is taken as a catalyst; catalytic efficiency is high; cost is relatively low; and no environment pollution is caused.

Description

technical field [0001] The invention relates to a method for preparing levulinic acid, in particular to a method for preparing levulinic acid based on an acidic catalyst catalyzing furan. Background technique [0002] As an important platform compound derived from biomass, levulinic acid contains a carbonyl group and a carboxyl group in its molecule, which can undergo various reactions such as esterification, redox, substitution and polymerization, and is widely used in bioactive materials. , lubricants and electronic products and many other fields. [0003] At present, there are two methods commonly used in the preparation of levulinic acid, the catalytic hydrolysis of furfuryl alcohol and the direct hydrolysis of biomass. The catalytic hydrolysis of furfuryl alcohol needs to go through multiple steps such as hydrolysis, dehydration, hydrogenation and hydrolysis, and the production process is complicated and the cost is high. Biomass direct hydrolysis can be divided into ...

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Application Information

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IPC IPC(8): C07C51/00C07C59/185
CPCC07C51/00C07D307/64C07C59/185
Inventor 郑妍胡勋邰志军李娇娇张晨霆
Owner UNIV OF JINAN
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