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Method for preparing pentanol through hydrogenation of 2-methylfuran by using platinum-based catalyst

A technology of methyl furan and catalyst, which is applied in the field of hydrogenation of 2-methylfuran to prepare amyl alcohol using platinum-based catalysts, which can solve the problems of easy inactivation of enzymes, difficulty in separating amyl alcohol, high cost, etc., and improve production Efficiency, catalytic performance improvement, and the effect of avoiding human error

Active Publication Date: 2022-02-11
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pentanol is traditionally obtained from biosynthesis. Biosynthesis usually has some disadvantages, such as easy inactivation of enzymes, and some require high temperature and high pressure ring reaction conditions for synthesis
Furthermore, separation of pentanol from petroleum is very difficult and costly due to complex process flow and separation steps

Method used

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  • Method for preparing pentanol through hydrogenation of 2-methylfuran by using platinum-based catalyst
  • Method for preparing pentanol through hydrogenation of 2-methylfuran by using platinum-based catalyst
  • Method for preparing pentanol through hydrogenation of 2-methylfuran by using platinum-based catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) The continuous flow device is composed of two peristaltic pumps, a magnetic stirrer, a PP tee, a Teflon pipeline, an oil bath and a collecting device; In a container, the outlet pipes of the two peristaltic pumps are connected to the two ends of the tee made of PP material, and the lower interface of the tee is connected to a length of Teflon pipe, and this section of Teflon pipe is fixed on In the oil bath, the outlet end of the last Teflon pipeline is fixed above the collection device;

[0041] (2) Add 3 g of multi-walled carbon nanotubes and 300 mL of nitric acid into the round bottom flask, install the round bottom flask in an oil bath, stir at 120° C., condense and reflux for 4 hours. After the purification, quickly add deionized water to cool down and dilute the acid concentration, repeatedly wash and filter the carbon nanotubes until the final filtrate pH=7, and then dry in an oven at 80°C for 12 hours. Take out the dried carbon nanotubes, put them into a mo...

Embodiment 2

[0076] (1) Add 3 g of multi-walled carbon nanotubes and 300 mL of nitric acid into a round bottom flask, install the round bottom flask in an oil bath, stir at 120° C., condense and reflux for 4 hours. After the purification, quickly add deionized water to cool down and dilute the acid concentration, repeatedly wash and filter the carbon nanotubes until the final filtrate pH=7, and then dry in an oven at 80°C for 12 hours. Take out the dried carbon nanotubes, put them into a mortar for grinding, and sieve through a 100-mesh standard sieve to make a carbon nanotube carrier;

[0077] (2) Dissolve 1 g of chloroplatinic acid in 50 mL of ultrapure water, and make it into a platinum precursor solution (Pt: 7.5 mg / mL) for later use;

[0078] (3) Weigh 190 mg of multi-walled carbon nanotube carrier, add it to a beaker, measure 200 ml of ethylene glycol for ultrasonic dispersion, put it on a magnetic stirrer and stir for later use, take 1330 μl of HPtCl 4 ·xH 2 O aqueous solution was...

Embodiment 3

[0079] Embodiment 3 Catalyst ICP test

[0080] The platinum-based catalysts prepared in Example 1 and Comparative Examples 1-1, 1-2, and 1-3 were weighed, dissolved in aqua regia, diluted to constant volume, and passed through an Inductively Coupled Plasma Optical Emission Spectrometer (ICP- OES) test, the results are shown in Table 1.

[0081] Table 1 Catalyst ICP test results

[0082]

[0083] According to the above results, the prepared catalysts of Example 1 and Example 2 have a loading rate greater than 95%, while the catalysts of Comparative Examples 1-1, 1-2, 1-3, 1-4, 1-5, and 1-6 The loading rate is all in 60%~90%, and the loading effect is not good, in order to be better with impregnation method (specific method reference document Selective hydroconversion of 2-methylfuran to pentanolson MWNT-supported Pt catalyst at ambient temperature prepared catalyst ( ICP: 4.9%)) Contrast, available embodiment 1 and embodiment 2 are used for the hydrogenation of 2-methylfur...

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Abstract

The invention provides a continuous-flow preparation method for a platinum-based catalyst. Compared with an impregnation method with the defects that time is long, selectivity is low, the manipulation of operators is depended, uneven mixing is easy to cause and the like, the continuous-flow preparation method of the platinum-based catalyst has the advantages of being simpler and more efficient and capable of realizing one-step and continuous production. According to the method, a pipe diameter of several millimeters is adopted, so the specific surface area of reaction liquid is greatly increased, mass and heat can be quickly transferred, and reaction liquid can be better mixed uniformly. Secondly, different amounts of solvents and reaction temperatures are screened, and a solvent dosage and an optimal reaction temperature are determined, so the conversion rate of pentanol prepared through hydrogenation of 2-methylfuran can reach 100% and the selectivity of pentanol is 70%, but however the selectivity of pentanol prepared through hydrogenation of 2-methylfuran by using a platinum-based catalyst prepared through the impregnation method is 53%; and the catalytic efficiency of the catalyst prepared by using the method can be improved by nearly 20% compared with the catalytic efficiency of the catalyst prepared by using the impregnation method. Mechanical operation can avoid human errors, so a result is easier to repeat, production efficiency is improved, and a new way is provided for preparing alcohol compounds by catalytic hydrogenation of furan derivatives.

Description

technical field [0001] The invention belongs to the technical field of biomass energy catalysis and continuous flow method preparation, and specifically relates to a preparation method of a platinum-based catalyst used for hydrogenation of biomass derivative 2-methylfuran to prepare fine chemical pentanol. Walled carbon nanotubes are used as the carrier, and platinum is used as the main active ingredient. Through the adjustment of different amounts of solvents, the production efficiency of the catalyst can be improved and the performance can be guaranteed by using the continuous flow preparation method. The catalyst can effectively catalyze the preparation of pentane from 2-methylfuran. Alcohol, and the continuous flow preparation method is efficient and simple, can be continuously mass-produced, reduces manual errors, and has great application value. Background technique [0002] Continuous flow reactor (Continuous flow reactor, CFR) is a novel technology, and the reaction ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C29/132C07C31/125B01J21/18B01J23/42
CPCC07C29/132B01J21/185B01J23/42C07C31/125
Inventor 王川陈凯琴彭思渊李国佳吴敏
Owner NANJING UNIV OF TECH
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