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Catalyst for preparing normal propyl alcohol through hydrogenolysis of glycerinum and preparation and using method thereof

A glycerin hydrogenolysis and catalyst technology, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of low selectivity and low conversion rate of propanol, etc. Achieve the effects of overcoming easy inactivation, good coordination, and saving production costs

Active Publication Date: 2018-07-27
HUAQIAO UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The purpose of the present invention is to overcome the disadvantages of low conversion rate and low selectivity in the preparation of propanol by hydrogenolysis of glycerol, and the shortcomings of requiring glycerol to be purified and dehydrated first, and to provide a green and efficient method for preparing n-propanol by hydrogenolysis of glycerol new way

Method used

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  • Catalyst for preparing normal propyl alcohol through hydrogenolysis of glycerinum and preparation and using method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Example 1: Dissolve 0.1mol silicotungstic acid and 0.03mol nickel nitrate in 200ml acetic acid solution, adjust the pH value of the solution to 3.5, react in a constant temperature water bath at 80°C for 0.5 hours, let stand at room temperature for 8 hours, and then evaporate to dryness in an oil bath. Dry overnight at 50°C in a vacuum oven to obtain H 4 ikB 12 powder. Al will be used as carrier 2 o 3 Soak in propanol for 2 hours, filter, and dry in an oven at 110°C for 2 hours to obtain the pretreated Al 2 o 3 carrier. Then the aforementioned heteropolyacid H of 3g 4 ikB 12 Dissolve 4.95g of nickel nitrate in 20ml of distilled water to make a co-impregnation solution, divide it into 5 equal parts, and spray it on 20g of pretreated Al 2 o 3 On the carrier, stir fully after each spraying, and then dry the carrier in a vacuum drying oven at 110°C for 30 minutes, and the impregnating solution is fully loaded. The impregnated catalyst was calcined in a muffle furn...

Embodiment 2

[0021] Example 2: Dissolve 0.1mol of phosphotungstic acid and 0.03mol of zinc nitrate in 200ml of acetic acid solution, adjust the pH value of the solution to 5.5, react in a constant temperature water bath at 80°C for 1 hour, let stand at room temperature for 10 hours, and then evaporate to dryness in an oil bath. Dry overnight at 50°C in a vacuum oven to obtain H 3 wxya 12 powder. TiO will be used as a carrier 2 Soak in propanol for 2 hours, filter, and dry in an oven at 110°C for 3 hours to obtain the pretreated Al 2 o 3 carrier. Then the aforementioned heteropolyacid H of 5.67g was prepared 3 NiPW 12 Dissolve 4.55g of zinc nitrate in 20ml of distilled water to make a co-impregnation solution, divide it into 5 equal parts, and spray it on 20g of pretreated Al2 o 3 On the carrier, stir fully after each spraying, and then dry the carrier in a vacuum drying oven at 110°C for 30 minutes, and the impregnating solution is fully loaded. The impregnated catalyst was calcine...

Embodiment 3

[0023] Example 3: Dissolve 0.1mol silicotungstic acid and 0.03mol zinc nitrate in 200ml acetic acid solution, adopt a method similar to Example 1, use SiO 2 As a carrier, prepare Zn / H 4 wxya 12 / SiO 2 catalyst. The prepared Zn / H 4 wxya 12 / SiO 2 Catalyst 2g, distilled water 70g, glycerin 30g, put into the autoclave, add initial pressure (hydrogen) to 6MPa, stir 700 rpm, heat up to 450 ℃, react for 8 hours, the conversion rate of glycerin is 87.8%, and the n-propyl Alcohol selectivity was 90.9%.

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Abstract

The invention discloses a catalyst for preparing normal propyl alcohol through hydrogenolysis of glycerinum and a preparation and using method thereof. The prepared metal-heteropolyacid bifunctional catalyst is suitable for taking water as a solvent in a hydrogenolysis reaction to prepare propyl alcohol, using of volatile, polluted or toxic solvents is avoided, the catalyst is green and environmentally friendly, and meanwhile, the production cost is reduced; meanwhile, the catalyst adapts to the characteristic, that a large amount of moisture is contained, of the by-product glycerinum which isgenerated through a biodiesel device, and overcomes the defect that an existing catalyst is prone to losing activity in a water-containing environment.

Description

technical field [0001] The invention relates to a catalyst for preparing n-propanol by hydrogenolysis of glycerin by-produced in the biodiesel preparation process and a preparation method thereof. Background technique [0002] N-propanol is an important organic raw material and platform compound. Its downstream applications are very extensive. It is mainly used as a solvent or in the synthesis of n-propyl acetate. It can also be used in coating solvents, printing inks, cosmetics and other industries and synthesis Medicines, pesticides, feed additives, synthetic spices, plasticizers and cleaning agents, etc. In recent years, as the consumption of environmentally friendly solvents has increased year by year, the market demand for n-propanol has also shown a continuous growth trend. However, due to the insufficient supply of domestically produced n-propanol, the import volume of n-propanol in my country increased from about 17,000 tons in 2008 to 45,600 tons in 2015, and the i...

Claims

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Application Information

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IPC IPC(8): B01J23/888B01J27/188B01J37/02B01J37/08B01J37/18C07C31/10C07C29/132
CPCB01J23/888B01J27/188B01J37/0207B01J37/088B01J37/18C07C29/132C07C31/10
Inventor 刘勇军楚素娅张陈洋周伟霞
Owner HUAQIAO UNIVERSITY
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