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A kind of method preparing valerate by levulinic acid

A technology of levulinic acid and levulinic acid, which is applied in the preparation of carboxylic acid esters, chemical instruments and methods, and the preparation of organic compounds, can solve the problems of high production costs and expensive precious metals, and reduce catalyst costs and reduce Loss, the effect of improving stability

Active Publication Date: 2017-10-31
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 (Green Chem., 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 0.1 g of 5 wt% Co / HZSM-5 catalyst, 1.0 g of levulinic acid and 20 mL of absolute ethanol into a 100 mL reactor, replace the gas with hydrogen for 6 times, fill it with hydrogen to 3 MPa, and raise the temperature to 200, Keep at 220 or 240°C for 1, 2, 3 or 6 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, specific experimental temperature, reaction time and detection The results are listed in Table 1 as numbers 1-7.

Embodiment 8-11

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

Embodiment 12-13

[0020] Put 0.1 g of Cu / HZSM-5 or Fe / HZSM-5 catalyst, 1.0 g of levulinic acid and 10 mL of absolute ethanol into a 100 mL 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 h, 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 number is 12-13.

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PUM

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Abstract

The invention discloses a method for preparing valerate from levulinic acid. Under the conditions of hydrogen pressure of 1-8 MPa, reaction temperature of 180-300°C and presence of a catalyst, levulinic acid raw materials are mixed in a solvent with Catalyst contact, carry out hydrogenation, esterification reaction 1-24 h, obtain valerate, catalyst is the HZSM-5 molecular sieve loaded with hydrogenation metal, and hydrogenation metal is iron, cobalt or copper. The invention does not need to use precious metals, has low cost, simple reaction system, easy industrialization, good catalyst stability and no 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, ɤ-valerolactone, methyl tetrahydrofuran, etc. However, when these components are mixed with fuel oil, satisfact...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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