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Method for preparing valerate from levulinic acid

A technology of levulinic acid and levulinic acid, which is applied in the preparation of carboxylate, chemical instruments and methods, preparation of organic compounds, etc., can solve the problems of expensive precious metals and high production costs, and achieve lower catalyst costs and reduced production costs. The effect of draining and improving stability

Active Publication Date: 2016-06-15
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some researchers used noble metal Ru catalysts to catalyze the conversion of levulinic acid into valerate in alcohol solution (GreenChem., 2013, 15, 2967-2974), but noble metals are expensive and the production cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-7

[0016] Put 0.1g of 5wt% Co / HZSM-5 catalyst, 1.0g of levulinic acid and 20mL of anhydrous ethanol into a 100mL reactor, pass through hydrogen to replace the gas for 6 times, fill with hydrogen to 3MPa, and raise the temperature to 200, 220 or 240°C , kept for 1, 2, 3 or 6 hours, finished the reaction and cooled to room temperature, decompressed to normal pressure, took the centrifuged supernatant and sent it to GC-MS and GC for detection. The specific experimental temperature, reaction time and detection results are listed in the table The serial number in 1 is 1-7.

Embodiment 8-11

[0018] Put 0.1g of 10wt% Co / HZSM-5 catalyst, 1.0g of levulinic acid and 10mL of anhydrous methanol, ethanol, propanol or butanol into a 100mL reactor, replace the gas with hydrogen gas for 6 times, and fill it with hydrogen to 3MPa. Raise the temperature to 240°C, keep it for 3 hours, finish the reaction and cool to room temperature, depressurize to normal pressure, take the centrifuged supernatant and send it to GC-MS and GC for detection. The specific experimental temperature, reaction time and detection results are listed in Table 1. The serial numbers are 8-11.

Embodiment 12-13

[0020] Put 0.1g of Cu / HZSM-5 or Fe / HZSM-5 catalyst, 1.0g of levulinic acid and 10mL of absolute ethanol into a 100mL reaction kettle, pass through hydrogen to replace the gas 6 times, fill it with hydrogen to 3MPa, and raise the temperature to 240 ℃, kept for 3 hours, finished the reaction and cooled to room temperature, decompressed to normal pressure, took the centrifuged supernatant liquid and sent it to GC-MS and GC for detection. -13.

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PUM

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Abstract

The invention discloses a method for preparing valerate from levulinic acid. According to the method, under a hydrogen pressure of 1-8MPa, a reaction temperature of 180-300 DEG C and the existence of a catalyst, a levulinic acid raw material contacts the catalyst in a solvent, and hydrogenation and esterification reactions are carried out for 1-24h, such that valerate is obtained. The catalyst is HZSM-5 molecular sieve loaded with hydrogenation metal. The hydrogenation metal is iron, cobalt or copper. According to the method, no precious metal is needed, and cost is low. A reaction system is simple, and can be easily industrialized. The catalyst has good stability, and is prevented from loss.

Description

technical field [0001] The invention belongs to the technical field of producing vehicle fuel with biomass, and relates to a method for preparing valerate from levulinic acid. Background technique [0002] First-generation biofuels were derived from sugars, starches and vegetable oils. Due to the problem of competing with food for raw materials, such biofuels are not suitable for large-scale use in the transportation industry. Inedible lignocellulosic feedstock is an ideal feedstock for sustainable energy due to its abundance and low cost. Levulinic acid is obtained by simple hydrolysis of lignocellulosic raw materials. It is one of the 12 platform compounds screened out by the US Department of Energy. It has the advantages of large output and wide application. Several levulinic acid derivatives are expected to be used as fuel additives, such as ethyl levulinate, ?-valerolactone, methyl tetrahydrofuran, etc. However, when these components are mixed with fuel, satisfactory ...

Claims

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Application Information

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IPC IPC(8): C07C69/24C07C67/08
Inventor 李福伟孙鹏夏春谷高广
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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