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A kind of method that utilizes platinum-based catalyst to be used for the hydrogenation of 2-methylfuran to prepare pentanol

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, high cost, and difficulty in separating amyl alcohol, and improve production Efficiency, avoidance of human error, effect of catalytic efficiency improvement

Active Publication Date: 2022-05-13
NANJING TECH UNIV
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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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  • A kind of method that utilizes platinum-based catalyst to be used for the hydrogenation of 2-methylfuran to prepare pentanol
  • A kind of method that utilizes platinum-based catalyst to be used for the hydrogenation of 2-methylfuran to prepare pentanol
  • A kind of method that utilizes platinum-based catalyst to be used for the hydrogenation of 2-methylfuran to prepare pentanol

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 of a platinum-based catalyst. Compared with the impregnation method, the time is long, the selectivity is low, and it depends on the operator's technique and the problems of easy mixing and unevenness. The method is simpler and more efficient, and can be produced in one step and continuously . The method adopts a pipe diameter of several millimeters, which greatly increases the specific surface area of ​​the reaction liquid, and can quickly transfer heat and mass, and the reaction liquid can be better mixed evenly. Secondly, this method has screened different amounts of solvents and reaction temperatures, determined the amount of solvent and the optimal reaction temperature, and can make 2-methylfuran hydrogenation to prepare amyl alcohol conversion rate can reach 100%, and the selectivity of amyl alcohol is 70%. %, while the platinum-based catalyst prepared by the impregnation method has a selectivity of 53% for the hydrogenation of 2-methylfuran to pentanol, and the catalytic efficiency can be improved by nearly 20% compared with the impregnation method. The mechanized operation can avoid human error, make the results more repeatable, improve the production efficiency, and provide a new way for the catalytic hydrogenation of furan derivatives to prepare alcohols.

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 Patents(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 TECH UNIV
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