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Solid super acid and preparation method, glycerol cyclohexanone ketal and preparation method

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: 2022-07-12
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 super acid and preparation method, glycerol cyclohexanone ketal and preparation method
  • Solid super acid and preparation method, glycerol cyclohexanone ketal and preparation method

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preparation example Construction

[0022] An embodiment of the present invention provides a method for preparing a solid superacid catalyst, which comprises the following steps:

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

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

Embodiment 1

[0046] A kind of preparation method of solid super acid catalyst, it comprises the steps:

[0047] Weigh 24g of ZrOCl 2 ·8H 2 O is dissolved in 240 mL of distilled water to prepare ZrOCl with a mass fraction of 10% 2 Solution, in the state of uniform stirring, slowly add ammonia water, adjust the pH to 10, stop adding ammonia water, get white precipitate, let the above precipitate stand at room temperature for 24h, carry out suction filtration, and wash with deionized water until Until there was no chloride ion (no white precipitate was detected with 0.1 mol / L silver nitrate), it was 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 (NH4) of 0.5mol / L 2 S 2 O 8 The solution was left in the solution for 24 hours, and then it was suction filtered to obtain a filter cake, which was then dried at 100 °C for 12 hours, placed in a muffle furnace and calcined at a temperature of 600 °C ...

Embodiment 2

[0052] A preparation method of a solid superacid catalyst, the preparation method is generally the same as that of Example 1, except that 16g of zirconium hydroxide is immersed in 0.5mol / L (NH4) 2 S 2 O 8 50mL solution for 24h.

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Abstract

The invention relates to a solid super acid and a preparation method, a glycerol cyclohexanone ketal compound and a preparation method. Wherein, the preparation method of the solid superacid catalyst comprises the following steps: immersing zirconium hydroxide in 0.4mol / L-0.6mol / L ammonium persulfate aqueous solution, filtering to obtain a filter cake; drying and roasting the filter cake The solid superacid catalyst is obtained, wherein the mass volume ratio of the zirconium hydroxide and the aqueous ammonium persulfate solution is (0.114-16.6): 1 g / mL. The preparation method of the above-mentioned solid superacid catalyst is simple. It only needs to mix the zirconium hydroxide and the aqueous ammonium persulfate solution according to the above ratio, filter to obtain a filter cake, then dry and roast the filter cake to activate the catalyst, and finally obtain the S-containing 2 O 8 2‑ / ZrO 2 The solid superacid catalyst has good catalytic activity and high product selectivity.

Description

technical field [0001] The invention relates to the field of solid acid catalysts, in particular to a solid super acid 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 corrosiveness and serious environmental pollution. Disadvantages such as "three wastes" restrict its application. [0003] Solid super acid refers to a type of strong acid solid acid prepared by loading an acidic active component on a metal oxide, and its surface acid strength is greater than 100% sulfuric acid. In acid catalysis, solid super acid overcomes many disadvantages of liquid acid catalyst, such as poor catalytic activity, many side reactions, strong corrosiveness and ...

Claims

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Application Information

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Patent Type & Authority Patents(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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