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Solid carbon-based Waugh-type molybdenum-containing heteropolyacid catalyst and application thereof

A technology of heteropoly acid and solid carbon, applied in the field of catalysis, can solve the problems of high cost, low catalytic efficiency, poor recovery, etc., and achieve the effects of easy recovery, improved catalytic performance, and shortened process time.

Inactive Publication Date: 2019-11-29
WENGFU (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the catalytic efficiency of the currently used catalysts is relatively low, the recovery is poor, and the cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Catalyst preparation:

[0022] Put 1.000g of activated carbon and 5ml of imidazole-4,5-dicarboxylic acid solution in a dilute acid solution with a pH of 3 prepared by sulfuric acid, add 0.2g of Waugh type manganese ammonium molybdate heteropolyacid, 1ml of octadecyl Dimethyl hydroxyethylenediyl ammonium nitrate, magnetically stirred at room temperature for 24 hours, then ultrasonically oscillated for 1 hour, moved into a hydrothermal reaction kettle, and used a temperature-programmed oven to raise the reaction temperature from room temperature to 150°C within 1 hour, and kept The temperature was kept for 48 hours, and then the temperature was naturally lowered to room temperature, washed several times with ultrapure water and ethanol respectively, filtered, and dried for 12 hours to obtain samples for later use.

[0023] Catalyst evaluation:

[0024] (1) The catalyst embodiment:

[0025] Dissolve 1.6667g of potassium iodide in an appropriate amount of deionized water,...

Embodiment 2

[0042] Catalyst preparation:

[0043] Put 1.000g of activated carbon and 5ml of imidazole-4,5-dicarboxylic acid solution in a dilute acid solution with a pH of 3 prepared by sulfuric acid, add 0.2g of ammonium polymolybdate, 1ml of octadecyldimethyl Hydroxyethylenediyl ammonium nitrate, magnetically stirred at room temperature for 24 hours, then ultrasonically oscillated for 1 hour, moved into a hydrothermal reaction kettle, and used a temperature-programmed oven to raise the reaction temperature from room temperature to 150°C within 1 hour, and kept the temperature for 48 hours, then cooled down to room temperature naturally, rinsed several times with ultrapure water and ethanol respectively, filtered, and dried for 12 hours to obtain samples for later use.

[0044] Catalyst evaluation:

[0045] Dissolve 1.6667g of potassium iodide in an appropriate amount of deionized water, transfer it to a 100mL volumetric flask, and adjust the volume to 0.01mol / L iodine solution, take 10...

Embodiment example 3

[0047] Catalyst preparation:

[0048] Put 1.000g of activated carbon and 5ml of imidazole-4,5-dicarboxylic acid solution in a dilute acid solution with a pH of 3 prepared by sulfuric acid, add 0.2g of Waugh type nickel ammonium molybdate heteropolyacid, 1ml of octadecyl Dimethyl hydroxyethylenediyl ammonium nitrate, magnetically stirred at room temperature for 24 hours, then ultrasonically oscillated for 1 hour, moved into a hydrothermal reaction kettle, and used a temperature-programmed oven to raise the reaction temperature from room temperature to 150°C within 1 hour, and kept The temperature was kept for 48 hours, and then the temperature was naturally lowered to room temperature, washed several times with ultrapure water and ethanol respectively, filtered, and dried for 12 hours to obtain samples for later use.

[0049] Catalyst evaluation:

[0050] Dissolve 1.6667g of potassium iodide in an appropriate amount of deionized water, transfer it to a 100mL volumetric flask, ...

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PUM

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Abstract

The invention discloses a solid carbon-based Waugh-type molybdenum-containing heteropolyacid catalyst and application thereof. A preparation method for the solid carbon-based Waugh-type molybdenum-containing heteropolyacid catalyst comprises the following steps: adding a carbonaceous porous material and a carboxyl functional group coupling agent into a dilute acid solution with a pH value of 3-4,carrying out magnetic stirring at room temperature for 12-24 h, then adding Waugh-type molybdenum-containing heteropoly acid and a surfactant, performing ultrasonic oscillation for 0.5-1 h, transferring the formed substance into a hydrothermal reactor, raising a reaction temperature from room temperature to 150-180 DEG C within 0.5-1 h by using a temperature-programmed oven, keeping the temperature for 48-72 h, then carrying out natural cooling to room temperature, performing rinsing with ultrapure water and ethanol several times separately, and carrying out filtering and drying for 10-12 h. The catalyst of the invention can efficiently catalyze hydrogen peroxide to oxidize iodine ions under heterogeneous conditions so as to produce elemental iodine; and the catalyst has the advantages ofmild reaction conditions, high utilization rate of hydrogen peroxide, friendliness to environment, no pollution, no peroxidation and good thermal stability, can be repeatedly reused a plurality of times, and is easy to recycle.

Description

technical field [0001] The invention belongs to the field of catalysis, and in particular relates to a preparation and application method of a Waugh-type solid carbon-based molybdenum-containing heteropolyacid catalyst for recovering iodine. Background technique [0002] Iodine is an important chemical raw material, and its chemical products are widely used in many industries such as food, medicine, dye, metallurgy, synthetic rubber, agriculture, and national defense cutting-edge technology. Since there are no special iodine resources, my country's iodine is mainly obtained from seaweed, phosphate rock, various natural brines and other resources, but the concentration of iodine in it is very low, resulting in the slow rate of oxidation of iodide ions into iodine. Although the total amount is large, the common feature of these iodine sources is that the iodine equivalent is relatively low, resulting in a slow rate of oxidation of iodide ions into iodine element, low extractio...

Claims

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Application Information

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IPC IPC(8): B01J31/16C01B7/14C02F9/04C02F101/12
CPCB01J27/19B01J23/34B01J23/883C01B7/14C02F1/722C02F1/725C02F1/66C02F2101/12
Inventor 郭军蔡丽丽解田史连军张丹李文飞
Owner WENGFU (GRP) CO LTD
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