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Coal ash catalyst and preparing method and application thereof

A technology for fly ash and catalyst, which is applied in chemical instruments and methods, preparation of hydroxyl compounds, preparation of organic compounds, etc., can solve the problems of complicated process flow, high cost, difficult sources, etc., and achieves simple process flow and convenient industrial application. , the effect of increasing the basic position

Active Publication Date: 2016-09-07
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In summary, in the methods currently available for preparing pentanediol, the reaction conditions are very harsh, and the input cost is high, the environmental pollution is large and the process flow is complicated, and the raw materials used are not easy to source and cost more than furfural. High, and the utilization of fly ash has not been fully developed

Method used

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  • Coal ash catalyst and preparing method and application thereof
  • Coal ash catalyst and preparing method and application thereof
  • Coal ash catalyst and preparing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The catalyst was prepared by impregnation method. First, take 2.0g of fly ash before treatment as carrier 1, add 100ml of 2mmol / L Cu(NO 3 ) 2 In the solution, after stirring and heating to 50°C, immerse for 24 hours. Afterwards, use a rotary evaporator to dry to obtain a solid powder, put the powder in a muffle furnace, and bake it at a constant temperature of 450° C. for 8 hours, then take it out and grind it. At a temperature of 250° C., the calcined powder was reductively activated in a hydrogen atmosphere for 5 hours to obtain the catalyst 1 used in the present invention.

[0037] Place the prepared catalyst in a 100mL autoclave, add 60mL of a mixture of furfural and ethanol (mass ratio of furfural to ethanol is 1:4), pass in nitrogen gas to exhaust the air, then pass in hydrogen gas and hold the pressure to 3Mpa , heated to 120°C, and stirred for 6 hours to obtain the reaction product. The conversion rate of furfural and the selectivity of 1,2-pentanediol and 1,...

Embodiment 2

[0039] The catalyst was prepared by impregnation method. First, a certain amount of fly ash was placed in a muffle furnace and activated at a constant temperature of 550°C for 3 hours. The calcined powder is added to the pre-prepared 0.2mol / L sodium hydroxide solution, heated and stirred for 1.5 hours, dried and calcined to activate the fly ash to obtain the spare carrier 2. Get 2.0g carrier 2 and add 100ml2mmol / L of Cu(NO 3 ) 2 In the solution, after stirring and heating to 50°C, immerse for 24 hours. Afterwards, use a rotary evaporator to dry to obtain a solid powder, put the powder in a muffle furnace, and bake it at a constant temperature of 450° C. for 8 hours, then take it out and grind it. At a temperature of 250° C., the calcined powder was reductively activated in a hydrogen atmosphere for 5 hours to obtain the catalyst 2 used in the present invention.

[0040] Place the prepared catalyst in a 100mL autoclave, add 60mL of a mixture of furfural and ethanol (furfura...

Embodiment 3

[0044] The operation steps are as described in Example 2, the mass ratio of furfural and ethanol in the 60mL reaction solution is changed to 1: 2.5, and the reaction product is obtained after the reaction. Alcohol selectivity is listed in Table 2.

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Abstract

The invention discloses a coal ash catalyst and a preparing method and application thereof. According to the coal ash catalyst and the preparing method and application thereof, environment-friendly Pt, Cu, Rh, Ni and Ru metal is used as the catalyst activity centers of the catalyst, solid waste coal ash obtained before treatment or after treatment serves as carriers, the catalyst activity centers are fixed to the carriers in a loaded mode, and the weight percent of the catalyst activity centers is 0.5% to 5%. The preparing method includes the steps that 1, the metal activity centers are loaded on the coal ash with a soaking method; 2, the powder prepared in the step 1 is dried and then reduced through hydrogen, and the coal ash catalyst is obtained. The coal ash catalyst is used for preparing pentanediol in the mode that hydrogen is added into furfural. The catalyst is environmentally friendly, waste resources are used, the environment is protected, alkaline sites of the simply-treated coal ash are greatly increased, and the reaction that hydrogen is added into furfural to prepare pentanediol is facilitated.

Description

Technical field: [0001] This patent relates to a fly ash catalyst, its preparation method and its application. Background technique: [0002] Furfural is produced from cellulose or hemicellulose in plant fiber raw materials under certain conditions, and is an important chemical raw material. At present, most of furfural in the world is used for the production of its derivatives, and my country's annual furfural production accounts for about half of the world's total production, but most of them are sold to other countries at relatively low prices. Therefore, it is of great significance to fully develop and utilize furfural. 1,2-Pentanediol is an important intermediate for the preparation of the fungicide propiconazole. It is an excellent moisturizer and has a certain antiseptic effect. The demand has grown rapidly in recent years. At present, few domestic enterprises produce 1,2-pentanediol, mainly relying on imports, which are expensive. Through literature review, it can...

Claims

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Application Information

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IPC IPC(8): B01J23/72B01J23/42B01J23/46B01J23/755C07C29/141C07C31/20
CPCC07C29/141B01J23/42B01J23/462B01J23/464B01J23/72B01J23/755C07C31/20
Inventor 任晓乾梁金花王跃桦胡曦张锋孟雷王俊杰王珏成静
Owner NANJING UNIV OF TECH
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