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1,3-propanediol catalyst prepared by directly hydrotreating glycerol and preparation method thereof

A catalyst, propylene glycol technology, applied in molecular sieve catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of low selectivity, low economy, low production efficiency, etc.

Inactive Publication Date: 2011-05-18
DALIAN 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

Since the product is an aqueous solution with a very low concentration, the production efficiency is low
[0009] Literature (Catalysis Communication 9 (2008) 1360-1363) reported a new method for the direct preparation of 1,3-propanediol by hydrogenation of glycerol, using 1,3-dimethyl-2-imidazolidinone as a solvent, by making 1,3 -Propylene glycol and hydrogen contact with a specific catalyst and remove a hydroxyl group to obtain 1,3-propanediol, but the by-product 1,2-propanediol is more, and the selectivity of the target product 1,3-propanediol is low, making the process economical lower

Method used

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  • 1,3-propanediol catalyst prepared by directly hydrotreating glycerol and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0027] The catalyst used is Pt / SiO 2 , denoted as catalyst A. The weight composition of catalyst A is: Pt%=2%, the rest is carrier SiO 2 . The preparation steps of catalyst A are:

[0028] Impregnate the support SiO with an aqueous solution of chloroplatinic acid containing the desired amount of Pt 2 , dried at 120°C for 3h, and calcined at 500°C for 3h to obtain catalyst A.

Embodiment 2

[0030] The catalyst used is Pt / WO 3 / SiO 2 , denoted as catalyst B. Catalyst B weight composition is: Pt%=2%, WO 3 %=5%, the rest is carrier SiO 2 . The preparation step of catalyst B comprises:

[0031] a) Impregnate the carrier SiO with an aqueous solution of ammonium metatungstate containing the desired amount of W 2 , dried at 120°C for 3h, and calcined at 600°C for 6h to obtain WO 3 / SiO 2 .

[0032] b) impregnating the WO obtained in step a with an aqueous solution of chloroplatinic acid containing the desired amount of Pt 3 / SiO 2 , dried at 120°C for 3h, and calcined at 500°C for 3h to obtain catalyst B.

Embodiment 3

[0034] The catalyst used is Pt / TiO 2 / SiO 2 , denoted as catalyst C. Catalyst C weight composition is: Pt%=2%, TiO 2 %=10%, the rest is carrier SiO 2 . The preparation steps of catalyst C comprise:

[0035] a) Impregnation of the carrier SiO with an ethanol solution of tetrabutyl titanate containing the desired amount of Ti 2 , dried at 120°C for 3h, and calcined at 600°C for 6h to obtain TiO 2 / SiO 2 .

[0036] b) Impregnate the TiO obtained in step a) with an aqueous solution of chloroplatinic acid containing the desired amount of Pt 2 / SiO 2 , dried at 120°C for 3h, and calcined at 500°C for 3h to obtain catalyst C.

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Abstract

The invention relates to a 1,3-propanediol catalyst prepared by directly hydrotreating glycerol and a preparation method thereof. The 1,3-propanediol catalyst at least contains Pt (Platinum), W (Tungsten), a high-melting-point oxide or a precursor thereof and a carrier, wherein the high-melting-point oxide or the precursor thereof contains ZrO2 or TiO2 or a precursor thereof; and the carrier is one of SiO2, Al2O3 and HZSM-5 or active carbon. The preparation method of the 1,3-propanediol catalyst comprises the following steps of: (a) soaking the carrier by using a solution of the precursor containing a certain amount of Zr or Ti, and drying and baking to prepare the carrier containing the ZrO2 or the TiO2; (b) soaking the carrier containing the ZrO2 or the TiO2 by using a solution containing the W, and drying and baking to prepare the carrier containing the W and the ZrO2 or the TiO2; and (c) soaking the carrier containing the W and the ZrO2 or the TiO2 by using a solution containing the Pt, and drying and baking to prepare the 1,3-propanediol catalyst. The 1,3-propanediol catalyst and the preparation method thereof can be used for converting an aqueous glycerol solution into 1,3-propanediol with high selectivity at certain temperature and hydrogen pressure after the aqueous glycerol solution contacts with the 1,3-propanediol catalyst for certain time.

Description

technical field [0001] The invention relates to a catalyst for directly hydrogenating glycerol to 1,3-propanediol. [0002] The present invention also relates to a method for preparing the above-mentioned catalyst. technical background [0003] 1,3-propanediol is an important raw material for the production of polytrimethylene terephthalate. The existing 1,3-propanediol preparation technologies include acrolein hydration hydrogenation method, ethylene oxide carbonylation hydrogenation method, microbial fermentation method and glycerol direct hydrogenation method. [0004] Chinese patent CN96198050.8 discloses a technology for producing 1,3-propanediol by carbonylation and hydrogenation of ethylene oxide, in which ethylene oxide and synthesis gas are reacted in the presence of a catalyst to generate 3-hydroxypropionaldehyde, 3- Hydroxypropionaldehyde reacts with hydrogen in the presence of a catalyst to produce 1,3-propanediol. [0005] Chinese patent CN93114516.3 disclose...

Claims

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Application Information

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IPC IPC(8): B01J23/652B01J29/48C07C31/20C07C29/60
Inventor 吕元龚磊峰丁云杰马立新
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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