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A kind of preparation method of nano solid strong base catalytic material k2[(oh)f4b3o3]

A F4B3O3, base catalysis technology, applied in chemical instruments and methods, nanotechnology, nanotechnology, etc., can solve problems such as hazards, and achieve good application prospects, high-efficiency catalysis, and low water solubility.

Active Publication Date: 2020-07-03
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the solid strong alkali used in modern industrial production is mainly KF / Al 2 o 3 , but KF has high toxicity and excellent water solubility, and it is easy to enter the environmental water body to cause greater harm. Therefore, it is urgent to develop alternative KF / Al 2 o 3 Environmentally friendly solid strong base catalyst

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1. Use nano-solid strong base catalytic material K 2 [(OH)F 4 B 3 o 3 ] Preparation:

[0024] (1) Potassium fluoride, boric acid, potassium fluoroborate, and potassium tetraborate were added to deionized water at a molar ratio of 2:2:5:4 and stirred for 15 minutes to obtain mixture 1. Potassium fluoride, boric acid, potassium fluoroborate, and tetraboric acid The mass ratio of potassium mixture to deionized water is 20%.

[0025] (2) After uniformly mixing OP-10, cetyl alcohol, and liquid paraffin with a mass ratio of 2:10:40, add it to mixture 1 obtained in step (1), the quality of OP-10, cetyl alcohol, and liquid paraffin is equal to that of mixture 1. The mass ratio was 30%, emulsified for 1 hour at a speed of 8,000 rpm using a high-speed disperser to obtain emulsified mixed liquid 1.

[0026] (3) Add the emulsified mixed solution 1 obtained in step (2) into a hydrothermal kettle, seal it, heat up to 110° C., and carry out hydrothermal treatment. The hydrotherma...

Embodiment 2

[0031] 1. Nano solid strong base catalytic material K 2 [(OH)F 4 B 3 o 3 ] Preparation:

[0032] (1) Potassium fluoride, boric acid, potassium fluoroborate, and potassium tetraborate were added to deionized water in a molar ratio of 4:4:7:6 and stirred for 30 minutes to obtain mixture 1. Potassium fluoride, boric acid, potassium fluoroborate, and tetraboric acid The mass ratio of potassium mixture to deionized water is 40%.

[0033] (2) After uniformly mixing OP-10, cetyl alcohol, and liquid paraffin with a mass ratio of 4:20:60, add it to mixture 1 obtained in step (1), the quality of OP-10, cetyl alcohol, and liquid paraffin is equal to that of mixture 1. The mass ratio was 50%, emulsified by a high-speed disperser at a speed of 20,000 rpm for 3 hours to obtain emulsified mixed liquid 1.

[0034] (3) Add the emulsified mixed solution 1 obtained in step (2) into a hydrothermal kettle, seal it, heat up to 120° C., and carry out hydrothermal treatment. The hydrothermal tre...

Embodiment 3

[0039] 1. Nano solid strong base catalytic material K 2 [(OH)F 4 B 3 o 3 ] Preparation:

[0040] (1) Potassium fluoride, boric acid, potassium fluoroborate, and potassium tetraborate were added to deionized water at a molar ratio of 3:3:6:5 and stirred for 22 minutes to obtain mixture 1. Potassium fluoride, boric acid, potassium fluoroborate, and tetraboric acid The mass ratio of potassium mixture to deionized water is 30%.

[0041] (2) After uniformly mixing OP-10, cetyl alcohol, and liquid paraffin with a mass ratio of 3:15:30, add it to the mixture one obtained in step (1), the quality of OP-10, cetyl alcohol, and liquid paraffin is equal to that of mixture one The mass ratio was 40%, emulsified by a high-speed disperser at a speed of 14,000 rpm for 2 hours to obtain emulsified mixed liquid 1.

[0042] (3) Add the emulsified mixed solution 1 obtained in step (2) into a hydrothermal kettle, seal it, heat up to 115° C., and carry out hydrothermal treatment. The hydrother...

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Abstract

The invention relates to the field of nano-material preparation, and aims at providing a method for preparing a solid base catalytic nano-material K2[(OH)F4B3O3]. The method comprises the following steps: stirring and mixing potassium fluoride, boracic acid, potassium fluoborate, potassium tetraborate and deionized water; adding OP-10, cetanol and liquid paraffin, mixing and emulsifying; adding the mixture into a hydrothermal kettle, heating to 110-120 DEG C for hydrothermal treatment to obtain the emulsified mixed liquid; demulsifying and centrifugally separating to obtain powder; and washingand drying the powder to obtain the solid base catalytic nano-material. The composite oxide material has relatively high basic strength, extremely small water solubility and extremely low F<->concentration ionized in water, and hardly causes pollution to the environmental water body. Therefore, the material is a relatively good environment-friendly catalytic material substituting KF / Al2O3, can realize efficient catalysis on Michael addition reaction, has a product yield of over 90 percent, can be applied to the field of brazing, heat insulating, metal corrosion prevention and the like, and has a good application prospect in other industrial industries.

Description

technical field [0001] The invention relates to the field of nanomaterial preparation, in particular to nanometer solid strong base catalytic material K 2 [(OH)F 4 B 3 o 3 ] The preparation method. Background technique [0002] A solid base refers to a substance whose surface has a tendency to donate electron pairs or accept protons, while a solid strong base is a material whose base strength is further limited to 26 or more on the basis of a solid base. [0003] Solid strong base can catalyze certain reactions that are difficult or have extremely low yields under mild conditions, such as Michael addition, Witting reaction, and Knoevenagel condensation reaction. In addition, when a solid strong base is used as a catalyst, it also has the advantages of easy separation of the product and the catalyst, continuous reaction to obtain the product, and less corrosion to the reaction equipment. [0004] At present, the solid strong alkali used in modern industrial production is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B35/00B82Y30/00B82Y40/00B01J27/08
CPCB01J27/08B82Y30/00B82Y40/00C01B35/00C01P2004/64
Inventor 张玲洁蔡伟炜沈涛
Owner ZHEJIANG UNIV
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