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Method for preparing 1,5-pentadiol by means of selective hydrogenolysis of tetrahydrofurfuryl alcohol

A tetrahydrofurfuryl alcohol, selective technology, applied in the field of selective hydrogenolysis preparation 1, can solve the problems of high price of noble metal Rh, limited catalyst application, etc.

Inactive Publication Date: 2013-02-06
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high price of noble metal Rh, the industrial application of this catalyst is limited.

Method used

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  • Method for preparing 1,5-pentadiol by means of selective hydrogenolysis of tetrahydrofurfuryl alcohol
  • Method for preparing 1,5-pentadiol by means of selective hydrogenolysis of tetrahydrofurfuryl alcohol
  • Method for preparing 1,5-pentadiol by means of selective hydrogenolysis of tetrahydrofurfuryl alcohol

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Experimental program
Comparison scheme
Effect test

Embodiment 1-8

[0021] Preparation of Catalyst by Impregnation Method

[0022] Add 10% soluble salt solution containing A to the carrier for impregnation according to a certain metering ratio, age at room temperature for 12 hours, and then dry in an oven at 120°C for 12 hours; then weigh the components according to a certain B / A molar ratio The soluble salt solution of B is added to the above-mentioned carrier impregnated with component A, aged at room temperature for 12 hours, then dried at 120°C for 12 hours, and calcined in air at 500°C for 3 hours to obtain the supported type A-B / X catalyst. The composition of catalyst in each embodiment, the kind of starting material of component A, B is shown in Table 1.

[0023] Table 1. Catalyst composition

[0024]

[0025]

Embodiment 8

[0027] Catalyst activity evaluation

[0028] The catalyst evaluation of the present invention is carried out in a fixed-bed mobile phase reactor, which is a stainless steel tube with an outer diameter of 6 mm and a length of 360 mm. The experimental process is as follows: 2g of catalyst is loaded into the reaction tube, the catalyst is reduced in situ before the reaction, the reduction temperature is 200°C, H 2 The pressure is 6MPa, H 2 The flow rate was 160mL / min, and the catalyst was reduced for 2 hours under this condition. After the reduction is completed, it is lowered to the reaction temperature, and the H 2 The flow rate is 60mL / min, the flow rate of tetrahydrofurfuryl alcohol liquid is 0.04mL / min, the pressure is adjusted to the required reaction pressure, and samples are taken for analysis after 6 hours of reaction.

[0029] (1) Comparison of the hydrogenolysis activity of tetrahydrofurfuryl alcohol with different noble metals, the activity evaluation results are s...

Embodiment 12

[0056] Catalyst Stability Test

[0057] For 4%Ir-Mo / SiO 2 (Mo / Ir=0.13) The catalyst was tested for stability, and the results are shown in Table 7.

[0058] Table 7 Catalyst stability test

[0059]

[0060] Note: The reaction pressure is 6MPa, the concentration of tetrahydrofurfuryl alcohol is 20%, and the catalyst used is 4% Ir-Mo / SiO 2 (Mo / Ir=0.13).

[0061] After the catalyst was tested for 24 hours of activity, the conversion rate and selectivity tended to be stable, and with the progress of the reaction, the selectivity of the catalyst to 1,5-pentanediol gradually increased, indicating that the catalyst had good stability.

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Abstract

The invention relates to a novel A-B / X or A / X supported catalyst for preparing 1,5-pentadiol by means of selective hydrogenolysis of tetrahydrofurfuryl alcohol obtained from forestry and agricultural residues. The component A refers to one or more of precious metals Ir, Pt and Pd, the auxiliary B refers to one or more of Mo, Re and W, and the carrier X refers to any one of SiO2, activated carbon and SiO2-Al2O3. The capacity of the precious metal A in the catalyst is 0.5-10%, the molar ratio of the auxiliary B to the precious metal A is 0.0-1.0, the reaction pressure is 2-20MPa, and the reaction temperature is 80-150 DEG C. The catalyst has the advantages of mild reaction conditions, high reactivity and high selectivity, and a novel effective way for preparation of 1,5-pentadiol from biomass of forestry and agricultural residues is provided.

Description

technical field [0001] The invention relates to a new method for preparing 1,5-pentanediol through selective hydrogenolysis of tetrahydrofurfuryl alcohol obtained from agricultural and forestry wastes. Specifically, A-B / X or A / X supported catalysts are used to realize a non-petroleum and renewable preparation route of 1,5-pentanediol from agricultural and forestry waste biomass under relatively mild conditions. Background technique [0002] With the increasing shortage of fossil resources in the world and the increasing price of petroleum, it is imperative to develop synthetic routes of renewable energy chemicals with high economic added value and high energy utilization efficiency. Biomass is the only renewable carbon source, and the selective and efficient conversion of inedible agricultural and forestry waste biomass to energy chemicals has become a hot research topic at present. Taking advantage of the high oxygen content of biomass, it can be selectively converted into...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C31/20C07C29/132B01J23/652B01J23/656
Inventor 张涛王志强李宁王爱琴王晓东
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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