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Solid superacid, preparation method of solid superacid, glycerinum cyclohexanone ketal and preparation method of glycerinum cyclohexanone ketal

A cyclohexanone ketal, solid super acid technology, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve problems such as poor catalytic activity of solid super acid catalysts

Active Publication Date: 2020-02-14
HUAIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Based on this, it is necessary to address the problem of poor catalytic activity of solid superacid catalysts prepared by traditional techniques, to provide a solid superacid catalyst capable of improving catalytic activity and its preparation method, glycerol cyclohexanone ketal and its preparation method

Method used

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  • Solid superacid, preparation method of solid superacid, glycerinum cyclohexanone ketal and preparation method of glycerinum cyclohexanone ketal
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  • Solid superacid, preparation method of solid superacid, glycerinum cyclohexanone ketal and preparation method of glycerinum cyclohexanone ketal

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preparation example Construction

[0022] A kind of preparation method of solid superacid catalyst is provided in one embodiment of the present invention, it comprises the steps:

[0023] Immerse zirconium hydroxide in 0.4mol / L-0.6mol / L ammonium persulfate aqueous solution, filter to obtain a filter cake; dry and roast the filter cake to obtain a solid superacid catalyst, wherein the hydroxide The mass volume ratio of zirconium to the ammonium persulfate aqueous solution is (0.114-16.6): 1g / mL.

[0024] Specifically, in the step of impregnating zirconium hydroxide in 0.4mol / L-0.6mol / L ammonium persulfate aqueous solution and filtering to obtain the filter cake, impregnating zirconium hydroxide in 0.4mol / L-0.6mol / L ammonium persulfate aqueous solution for 12-36h, and suction filtered to obtain a filter cake. The advantage of suction filtration is to remove free water, so as to avoid the formation of water vapor pressure during drying and roasting, which is unfavorable for the preparation of catalysts. Addition...

Embodiment 1

[0046] A preparation method for a solid superacid catalyst, comprising the steps of:

[0047] Weigh 24g of ZrOCl 2 ·8H 2 O is dissolved in the distilled water of 240mL and is configured into the ZrOCl that mass fraction is 10% 2 Solution, in the state of stirring at a constant speed, slowly add ammonia water dropwise, adjust the pH to 10, stop adding ammonia water, and obtain a white precipitate, leave the above precipitate at room temperature for 24h, carry out suction filtration, and wash with deionized water until Until there is no chloride ion (no white precipitate is detected by 0.1mol / L silver nitrate), it is dried in a blast drying oven at 120°C, taken out and ground to obtain zirconium hydroxide.

[0048] Immerse 6g of zirconium hydroxide in 100mL of 0.5mol / L (NH4) 2 S 2 o 8 solution for 24 hours, then suction-filtered to obtain a filter cake, which was then dried at 100°C for 12 hours, placed in a muffle furnace and roasted at a temperature of 600°C for 4 hours t...

Embodiment 2

[0052] A kind of preparation method of solid superacid catalyst, its preparation method is substantially identical with embodiment 1, and difference is that 16g zirconium hydroxide is impregnated in 0.5mol / L (NH ) 2 S 2 o 8 24h in 50mL solution.

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Abstract

The invention relates to a solid superacid and a preparation method thereof, and a glycerin cyclohexanone ketal and a preparation method thereof. The preparation method of the solid superacid catalystcomprises the following steps: soaking zirconium hydroxide in a 0.4mol / L-0.6mol / L ammonium persulfate aqueous solution, and filtering to obtain a filter cake; drying and roasting the filter cake to obtain the solid superacid catalyst, wherein the mass volume ratio of zirconium hydroxide to the ammonium persulfate aqueous solution is (0.114-16.6): 1 g / mL. The preparation method of the solid superacid catalyst is simple, only zirconium hydroxide and the ammonium persulfate aqueous solution need to be mixed according to the proportion and filtered to obtain the filter cake, then the filter cakeis dried and roasted to activate the catalyst, and finally the prepared solid superacid catalyst containing S2O8<2-> / ZrO2 is good in catalytic activity and high in product selectivity.

Description

technical field [0001] The invention relates to the field of solid acid catalysts, in particular to a solid superacid and a preparation method, a glycerol cyclohexanone ketal and a preparation method. Background technique [0002] At present, the effective catalysts commonly used in industrial production are mainly concentrated sulfuric acid, phosphoric acid and hydrochloric acid. During the catalytic reaction of this catalyst, there are many side reactions such as sulfonation and oxidation, strong corrosion and serious environmental pollution. The disadvantages such as "three wastes" limit its application. [0003] Solid superacid refers to a kind of strongly acidic solid acid prepared by loading acidic active components on metal oxides, and its surface acid strength is greater than 100% sulfuric acid. In acid catalysis, solid superacid overcomes many disadvantages of liquid acid catalysts, such as poor catalytic activity, many side reactions, strong corrosion and serious ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/02C07D317/72
CPCB01J27/02C07D317/72Y02P20/584
Inventor 李万伟张再兴胡扬剑
Owner HUAIHUA UNIV
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