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Bismuth-containing catalyst for preparation of glyceric acid through selective oxidation of glycerin and preparation method of catalyst

A technology for oxidizing glycerin and bismuth catalysts, which is applied in the direction of metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., and can solve problems such as high cost, energy consumption, and material consumption. Achieve the effects of reduced reactivity, high conversion rate of glycerol, and simple preparation method

Active Publication Date: 2017-11-07
NANJING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the catalyst efficiency and stability need to be further improved to meet the requirements of industrial production, and the energy consumption and material consumption are still relatively serious.
higher cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Dissolve 0.2 mol of bismuth chloride in 5 L of absolute ethanol, and stir at room temperature for 0.5 h to obtain ethanol solution of bismuth chloride. Then 3 mol of copper nitrate, 3 mol of nickel chloride and 3 mol of aluminum nitrate were dissolved in 6 L of deionized water, namely the polymetallic salt solution. Slowly add 5 L bismuth chloride ethanol solution and 6 L polymetallic salt solution into a certain amount of 12 L 2mol / L ammonium carbonate solution within 1 h, adjust the pH value to 9-11 with ammonia water, and stir and age at 60 °C 8 h, cooled, washed to neutral, filtered under reduced pressure, and vacuum-dried at 60°C for 12 h to obtain a bismuth-containing layered multi-metal hydroxide catalyst. The bismuth-containing layered multi-metal hydroxide Calcined in a heating furnace under N2 at 250 °C for 3 h, the bismuth-containing layered metal composite oxide catalyst was obtained. The catalytic effect: the conversion rate of glycerol was 34.2%, and the s...

Embodiment 2

[0031] Dissolve 1 mol of bismuth nitrate in 10 L of ethylene glycol, and stir at room temperature for 3 h to obtain a bismuth nitrate solution in ethylene glycol. Then 1.5 mol ferric nitrate and 1.5 mol cobalt nitrate were dissolved in 6 L of deionized water, that is, polymetallic salt solution. Slowly add 10 L bismuth nitrate ethylene glycol solution and 6 L polymetallic salt solution into a certain amount of 12 L 2 mol / L sodium carbonate solution within 1 h, and adjust the pH value to 9-11 with sodium hydroxide solution , stirred and aged at 30°C for 24 h, cooled, washed until neutral, filtered under reduced pressure, and vacuum-dried at 110°C for 8 h to obtain a bismuth-containing layered polymetallic hydroxide catalyst. The bismuth-containing layered polyhydroxide The metal hydroxide was calcined in a heating furnace under N2 at 450 °C for 4 h to obtain a bismuth-containing layered metal composite oxide catalyst. The catalytic effect: the conversion rate of glycerol was 67...

Embodiment 3

[0033] Dissolve 1.5 mol of bismuth chloride in 10 L of absolute ethanol and glycerin (volume ratio 1:1), and stir at room temperature for 2 h to obtain bismuth chloride ethanol-glycerol solution. Then 4.5 mol copper chloride, 4.5 mol zinc chloride and 1.5 mol manganese nitrate were dissolved in 6 L of deionized water, that is, the polymetallic salt solution. Slowly add 10 L bismuth chloride ethanol glycerol solution and 6 L polymetallic salt solution into a certain amount of 6 L 5 mol / L sodium carbonate solution within 1 h, and adjust the pH value to 9-11 with potassium hydroxide solution , stirred and aged at 45°C for 18 h, cooled, washed until neutral, filtered under reduced pressure, and vacuum-dried at 90°C for 10 h to obtain a bismuth-containing layered polymetallic hydroxide catalyst. The bismuth-containing layered polyhydroxide The metal hydroxide was calcined in a heating furnace under N2 at 600 °C for 6 h to obtain a bismuth-containing layered metal composite oxide ca...

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PUM

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Abstract

The invention discloses a bismuth-containing catalyst for preparation of glyceric acid through selective oxidation of glycerin and a preparation method of the catalyst. The bismuth-containing catalyst is characterized in that the catalyst takes bismuth as an active component and layered hydroxide or layered metal composite oxide as a carrier. The preparation method comprises steps as follows: a bismuth salt solution is prepared; a soluble metallic salt solution is prepared, the two solutions are slowly added to a certain quantity of soluble carbonate solutions for pH value adjustment, stirred at the constant temperature to be aged, cooled, washed to be neutral, subjected to suction filtration under reduced pressure and vacuum drying and then calcined, and the catalyst is obtained. The prepared catalyst is used for preparation of glyceric acid through selective oxidation of glycerin and has the characteristics of high glycerin conversion rate, good selectivity of the product, namely, glyceric acid, simple preparation method, good repeated use performance and low cost.

Description

technical field [0001] The invention relates to a bismuth-containing catalyst for selectively oxidizing glycerin to prepare glyceric acid and a preparation method thereof, belonging to the technical field of glycerin selective catalysts. Background technique [0002] There are three hydroxyl groups in the glycerol molecule. Theoretically, the catalytic oxidation of glycerin will generate a series of high value-added chemical products. The conventional production processes of these chemicals are mostly traditional chemical oxidation processes with high cost and serious pollution (such as potassium permanganate oxidation, nitric acid oxidation, and chromic acid oxidation) or low-yield fermentation processes. Their industrial applications and yields limited. The catalytic oxidation of glycerol is a complex process of multiple parallel reactions and series of reactions. Catalytic oxidation of the hydroxyl functional group on the primary carbon of glycerol can produce glycerald...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/843B01J23/86B01J23/889C07C51/235C07C59/10
CPCB01J23/002B01J23/8437B01J23/868B01J23/8892B01J2523/00C07C51/235B01J2523/17B01J2523/31B01J2523/54B01J2523/847B01J2523/842B01J2523/845B01J2523/27B01J2523/72B01J2523/55B01J2523/67B01J2523/15B01J2523/22B01J2523/25C07C59/10
Inventor 吴功德王晓丽黄江棱唐旭
Owner NANJING INST OF TECH
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