Method for preparing easily dispersed magnetic biomass carbon-based solid acid catalyst

A carbon-based solid acid and biomass technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of long magnetic retention time, high chemical activity, and reduced dispersion, and achieve Low cost, simple preparation process, and long magnetic time

Inactive Publication Date: 2016-08-24
NINGBO JIANGDONG POMONA ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem mainly solved by the present invention: for the magnetic component in the current magnetic biomass carbon-based solid acid catalyst, due to the small particle size of the magnetic particles, the surface has a large specific surface area and high surface activity, so it is easy to Agglomeration, reduced dispersion, and high chemical activity, easy to be oxidized, resulting in the problem that the magnetic properties of the system are reduced. A method for preparing an easily dispersible magnetic biomass carbon-based solid acid catalyst is provided. The present invention takes walnut shells for acidification. After alkali modification, it is ground into powder, ferrous sulfat

Method used

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Examples

Experimental program
Comparison scheme
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Example Embodiment

[0016] Example 1

[0017] 8. First weigh 400g walnut shells and pour them into a 5L beaker, add an appropriate amount of distilled water to the beaker until the walnut shells are completely immersed, and then move the beaker into an ultrasonic oscillator, ultrasonically wash with 100W power for 20 minutes to remove dust on the surface of the walnut shell, and finally put it Dry in an oven to obtain clean walnut shells; put the washed walnut shells into a jet mill and pulverize them into walnut pieces with a particle size of less than 5 mm. The pieces are respectively used with concentrations of 0.5 mol / L sulfuric acid and 0.3 mol / L caustic soda is soaked for 1 hour. After soaking, rinse the fragments with deionized water until the eluent is neutral. Then put the walnut shell fragments modified by acid and alkali into a corundum mortar and grind them into powder; Add 100mL of 0.2mol / L ferrous sulfate and 200mL of 0.3mol / L ferric nitrate solution to the three-necked flask of the t...

Example Embodiment

[0019] Example 2

[0020] 10. First weigh 450g of walnut shells and pour them into a 5L beaker, add an appropriate amount of distilled water to the beaker until the walnut shells are completely immersed, then move the beaker into an ultrasonic oscillator, and ultrasonically wash with 150W power for 25 minutes to remove dust on the surface of the walnut shell, and finally put it Dry in an oven to obtain clean walnut shells; put the washed walnut shells into a jet mill and pulverize them into walnut pieces with a particle size of less than 5 mm. The pieces are respectively used with concentrations of 0.5 mol / L sulfuric acid and 0.3 mol / L caustic soda is soaked for 1.5h. After soaking, rinse the fragments with deionized water until the eluent is neutral. Then put the walnut shell fragments modified by acid and alkali into a corundum mortar and grind them into powder; Add 150mL of 0.2mol / L ferrous sulfate and 250mL of 0.3mol / L ferric nitrate solution to a three-necked flask with a s...

Example Embodiment

[0022] Example 3

[0023] 12. First weigh 500g of walnut shells and pour them into a 5L beaker, add an appropriate amount of distilled water to the beaker until the walnut shells are completely immersed, and then move the beaker into an ultrasonic oscillator, ultrasonically wash with 200W power for 30 minutes to remove dust on the surface of the walnut shell, and finally put it Dry in an oven to obtain clean walnut shells; put the washed walnut shells into a jet mill and pulverize them into walnut pieces with a particle size of less than 5 mm. The pieces are respectively used with concentrations of 0.5 mol / L sulfuric acid and 0.3 mol / Soak in L caustic soda for 2 hours. After soaking, rinse the fragments with deionized water until the eluent is neutral. Put the walnut shell fragments modified by acid and alkali into a corundum mortar and grind them into powder; Add 200mL of 0.2mol / L ferrous sulfate and 300mL of 0.3mol / L ferric nitrate solution to the three-necked flask of the the...

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Abstract

The invention discloses a preparation method of an easily dispersible magnetic biomass carbon-based solid acid catalyst, belonging to the field of carbon-based solid acid catalysts. In the present invention, walnut shells are modified by acid and alkali and then ground into powder, ferrous sulfate, ferric nitrate and walnut shell powder are mixed and reacted to obtain a magnetic biomass matrix, and then the surface of the magnetic biomass matrix is ​​coated with silicon dioxide to obtain The catalyst precursor can be carbonized, sulfonated, washed and dried. In the present invention, after the magnetic biomass substrate is coated with silica, the dispersibility and thermal stability of the magnetic particles in the aqueous solution are promoted, and agglomeration is not easy to occur. At the same time, the activity of the catalyst is improved, it is not easy to be oxidized, the magnetism can be maintained for a long time, the recycling rate is high, and the preparation process is simple and the cost is low.

Description

technical field [0001] The invention discloses a preparation method of an easily dispersible magnetic biomass carbon-based solid acid catalyst, belonging to the field of carbon-based solid acid catalysts. Background technique [0002] With the enhancement of people's awareness of environmental protection and the continuous development of green chemical production in recent years, the development of environmentally friendly solid acid catalysts has attracted more and more attention from scientific researchers. It has high catalytic activity, high selectivity, mild reaction conditions, and can be recycled. Solid catalysts with advantages such as use have more and more obvious advantages in industries such as the environment, chemistry, and pharmaceuticals. In particular, bifunctional composite solid acid catalysts exhibit many excellent properties different from conventional solid acids, especially in terms of catalytic activity and high specific surface area. It also shows b...

Claims

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Application Information

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IPC IPC(8): B01J27/02B01J21/08
CPCB01J27/02B01J21/08B01J35/0033B01J37/084
Inventor 叶先龙王志慧林大伟
Owner NINGBO JIANGDONG POMONA ELECTRONICS TECH
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