Preparation method of hydroxyapatite supported heteropolyacid salt catalyst for catalytic oxidation desulfurization

A technology for catalytic oxidative desulfurization and hydroxyapatite, which is used in the purification of oxygenated compounds, organic compounds/hydrides/coordination complex catalysts, physical/chemical process catalysts, etc., which can solve the problem of high cost and difficulty in recycling. And other issues

Pending Publication Date: 2019-08-16
HAINAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There have been many in-depth research reports on the oxidative desulfurization technology using ionic liquids as extractants, but there is still a large distance from the actual requirements. The catalyst is easily soluble in the ionic liquid phase, which is difficult to recycle or has certain toxicity and cost. advanced issues, which fundamentally limit industrial production applications

Method used

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  • Preparation method of hydroxyapatite supported heteropolyacid salt catalyst for catalytic oxidation desulfurization
  • Preparation method of hydroxyapatite supported heteropolyacid salt catalyst for catalytic oxidation desulfurization
  • Preparation method of hydroxyapatite supported heteropolyacid salt catalyst for catalytic oxidation desulfurization

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Experimental program
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Effect test

Embodiment 1

[0030] Preparation of hydroxyapatite-supported phosphotungstate catalyst:

[0031] Mix 0.5g of 3-chloropropyl-trimethoxysilane with 1g of N-methylimidazole, control the temperature at 95°C, stir vigorously for 16h, extract and separate the ionic liquid, and then mix the ionic liquid with hydroxyapatite by mass The ratio is 1:2 for feeding, reflux stirring for 15h, and drying to obtain hydroxyapatite-bonded ionic liquid. The ionic liquid (molar ratio: 20:2) bonded with phosphotungstic acid and hydroxyapatite was reacted at 35°C for 2 hours, washed and dried with a solvent to obtain a hydroxyapatite-supported phosphotungstate catalyst.

Embodiment 2

[0032] Embodiment 2: Preparation of hydroxyapatite supported phosphomolybdate catalyst:

[0033] Mix 0.3g of 3-chloropropyl-trimethoxysilane with 1g of N-methylimidazole, control the temperature at 95°C, stir vigorously for 16 hours, extract and separate the ionic liquid, and then mix the ionic liquid with hydroxyapatite in a mass ratio Feed for a ratio of 1:1.5, reflux and stir for 15 hours, and dry to obtain a hydroxyapatite-bonded ionic liquid. The ionic liquid (molar ratio: 25:1) bonded to phosphomolybdic acid and hydroxyapatite was reacted at 35° C. for 2 hours, washed and dried with a solvent to obtain a hydroxyapatite-supported phosphomolybdate catalyst.

Embodiment 3

[0034] Embodiment 3: Preparation of hydroxyapatite supported vanadium molybdate catalyst:

[0035]Mix 0.3g of 3-chloropropyl-trimethoxysilane with 1g of 1-ethylimidazole, control the temperature at 95°C, stir vigorously for 16 hours, extract and separate the ionic liquid, and then mix the ionic liquid with hydroxyapatite by mass The ratio is 1:2 for feeding, reflux stirring for 15h, and drying to obtain hydroxyapatite-bonded ionic liquid. The ionic liquid (molar ratio: 40:1) bonded with vanadium molybdenum acid and hydroxyapatite was reacted at 35° C. for 2 hours, washed and dried with a solvent to obtain a hydroxyapatite-supported vanadium molybdate catalyst.

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Abstract

The invention belongs to the technical field of environmental protection, and particularly relates to a preparation method of a hydroxyapatite supported heteropolyacid salt catalyst for catalytic oxidation desulfurization. An ionic solution is prepared from a chloride and a nitrogen-containing compound, then hydroxyapatite is bonded with the ionic solution, and finally, heteropolyacid reacts withthe hydroxyapatite bonded ionic solution to obtain the hydroxyapatite supported heteropolyacid salt catalyst. The prepared catalyst is used for catalytic oxidation desulfurization, and the catalytic oxidation desulfurization comprises the following steps: mixing an oil product with the catalyst according to a ratio, sequentially adding an ionic liquid and an oxidizing agent according to a proportion under a certain temperature and a normal pressure condition, carrying out a reaction, and then carrying out cooling to room temperature to remove thiophene sulfur-containing compounds in the oil product. Compared with a method using a conventional catalyst, the method has the advantages that the desulfurization condition is mild, desulfurization can be carried out in a low-concentration hydrogen peroxide (0.5%-5%) system, and the desulfurization effect in the oil product is good.

Description

technical field [0001] The invention relates to a preparation method of a hydroxyapatite-loaded heteropolysalt catalyst used for catalytic oxidation desulfurization, and belongs to the technical field of environmental protection. Background technique [0002] Environmental problems and health hazards caused by exhaust emissions from oil-powered locomotives, increasingly stringent environmental regulations and air quality standards on the sulfur content of oil products, and the growing demand for low-sulfur diesel fuel have prompted many Scientists have devoted more and more attention and efforts to the research of oil desulfurization. Among them, reducing the emission of sulfur oxides, particulate matter and other harmful pollutants is the main purpose of many countries to limit the level of sulfur content in oil products to lower and lower. Studies have found that by using low-sulfur fuel oil and particulate matter filters together, particulate matter emissions can be redu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/26C10G27/12C10G53/14
CPCB01J31/26C10G27/12C10G53/14C10G2300/202
Inventor 朱林华黄卉苏慧琳陈光英戴春燕
Owner HAINAN NORMAL UNIV
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