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Method of cellulose catalytic conversion to prepare dihydric alcohol, hexahydric alcohol and gamma-valerolactone

A catalytic conversion and cellulose technology, applied in chemical instruments and methods, molecular sieve catalysts, preparation of hydroxyl compounds, etc., to achieve the effects of small investment, easy industrialization, and low equipment requirements

Active Publication Date: 2014-10-01
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no report that uses cellulose as a raw material and exists in the pores of molecular sieves in the form of coating through metal or metal interstitial compounds. Using this coating catalyst to catalyze the conversion of cellulose to produce chemicals with high efficiency and high selectivity

Method used

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  • Method of cellulose catalytic conversion to prepare dihydric alcohol, hexahydric alcohol and gamma-valerolactone
  • Method of cellulose catalytic conversion to prepare dihydric alcohol, hexahydric alcohol and gamma-valerolactone
  • Method of cellulose catalytic conversion to prepare dihydric alcohol, hexahydric alcohol and gamma-valerolactone

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Preparation of molecular sieve-coated metal catalysts by hydrothermal synthesis: Pt(NH 3 ) 4 (NO 3 ) 2 , water glass, sodium metaaluminate, sodium hydroxide, deionized water to make nPt:nSiO 2 :nAl 2 o 3 : nNa 2 O:nH 2 The silica-alumina sol with O=0.51:70:1:12:2400 was placed in a crystallization kettle and crystallized at 160° C. for 3 days. The obtained sample was washed with deionized water to neutrality, and then dried in an oven at 120 °C for 12 h, then the catalyst precursor was subjected to NH 4 Cl exchange treatment, exchange the obtained catalyst in H 2 In the atmosphere, the temperature was raised to 400°C at a rate of 2°C / min and reduced for 3 hours to obtain a Pt / ZSM-5 catalyst, and Pt metal accounted for 1% of the weight of the catalyst. Pt(NH 3 ) 4 (NO 3 ) 2 into Ru(NH 3 ) 6 Cl 3 , to obtain Ru / ZSM-5 catalyst, Ru metal accounted for 5% of catalyst weight. . Catalyst coating success with 1-hexene (0.5nm, smaller than ZSM-5 pore size 0.55n...

Embodiment 2

[0014] Synthesis of molecular sieve-coated metal catalysts by ion exchange: mix 5.0gNaY with 0.02mol / LPd(NH 3 ) 4 (NO 3 ) 2 The solution was ion-exchanged at 80°C for 4h, the obtained sample was filtered, washed with water, and then dried in an oven at 120°C for 12h, then the catalyst precursor was subjected to NH 4 Cl exchange treatment, exchange the obtained catalyst in H 2 In the atmosphere, the temperature was raised to 500°C for 3 hours at a rate of 2°C / min, and then the obtained sample was subjected to NH 4 Cl exchange treatment, exchange the obtained catalyst in N 2 In the atmosphere, the temperature was raised to 500°C at a rate of 2°C / min and reduced for 3 hours to obtain a Pd / Y catalyst, and Pt metal accounted for 2% of the weight of the catalyst. A Pt / ZSM-5 catalyst was obtained. 0.02mol / L Pd(NH 3 ) 4 (NO 3 ) 2 The solution was replaced with 0.01mol / LPd(NH 3 ) 4 (NO 3 ) 2 and Ni(NH 3 ) 6 Cl 2 solution to obtain a Pd-Ni / Y catalyst. The success of ca...

Embodiment 3

[0016] Synthesis of molecular sieve-coated metal phosphide catalysts by impregnation method: nickel nitrate and hypophosphorous acid were formulated into a 0.1mol / L nickel salt solution with a molar ratio of 1:4, 5.0g NaY was placed in the mixture, and the Impregnated and stirred for 6h, then evaporated to dryness at 100°C. The obtained sample was dried in an oven at 120°C for 12 hours, and then placed in H 2 In the atmosphere, the temperature was raised to 400°C for 3 hours at a rate of 5°C / min, and then the obtained sample was subjected to NH 4 Cl exchange treatment, exchange the obtained catalyst in N 2 In the atmosphere, the temperature was raised to 400°C at a rate of 2°C / min for 3 hours to obtain Ni 2 P / Y catalyst, Ni 2P accounts for 20% by weight of the catalyst. Replace the nickel nitrate solution used with Ru(NH 3 ) 6 (NO 3 ) 3 solution to obtain a RuP / Y catalyst, where RuP accounts for 5% by weight of the catalyst. The success of the catalyst coating was ver...

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Abstract

The invention relates to cellulose conversion to prepare chemicals, and particularly relates to a method, wherein a molecular sieve and a metal or a metal interstitial compound are adopted as active components, the metal or the metal interstitial compound are clad within pore channels of the molecular sieve to prepare a bifunctional catalyst, and the catalyst is used for cellulose hydrogenation degradation conversion to prepare dihydric alcohol, hexahydric alcohol and gamma-valerolactone. The molecular-sieve-clad metal or interstitial compound catalyst has characteristics of small size of the metal or the metal interstitial compound nanometer particles, high dispersity, high catalyst activity and high selectivity.

Description

technical field [0001] The invention relates to the preparation of chemicals by converting cellulose, in particular to a method for preparing diols, hexaols and gamma-valerolactones by using molecular sieve-coated metals or metal interstitial compounds to catalyze cellulose hydrogenation degradation conversion. Background technique [0002] Cellulose is the most abundant biomass resource in nature, and its catalytic conversion to energy chemicals is the focus and focus of academic and industrial research. Glucose, sorbitol, ethylene glycol, synthesis gas, aromatic hydrocarbons, and furan compounds can be obtained by catalytic degradation of cellulose. The above compounds can be derived into more chemicals or commodities, which may become the basis of future chemistry, materials and fuels. Cellulose is polymerized by glucose molecules through β-1,4-glucosidic bonds to form a single chain of cellulose, and then forms a supramolecular stable structure through hydrogen bonds an...

Claims

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Application Information

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IPC IPC(8): C07C31/20C07C31/26C07C29/00C07D307/33B01J29/44B01J29/12
CPCB01J29/126B01J29/44B01J2229/186C07C29/00C07D307/33C07C31/26C07C31/20
Inventor 吴志杰窦涛吴宇辰尹琪
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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