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Titanium-dioxide-based compound/lewis acid composition for preparing allantion and preparing method of titanium-dioxide-based compound/lewis acid composition

A technology of titanium dioxide and Lewis acid, applied in the field of allantoin, can solve the problems of not very superior catalytic effect, equipment corrosion, environmental pollution and the like

Active Publication Date: 2018-11-06
茆振斌
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing catalysts are generally inorganic strong acids. As a catalyst, inorganic strong acids will cause corrosion to equipment and pollute the environment; what is more important is that the catalytic effect of inorganic strong acid catalysts is not very superior, resulting in a generally low yield of allantoin

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0017] The invention provides a method for preparing a titanium dioxide-based complex / Lewis acid composition for preparing allantoin, comprising:

[0018] 1) Mix tetrabutyl titanate, graphene, dimethylformamide, and ethanol to form solution A;

[0019] 2) Mix water, ethanol and acetic acid to form solution B;

[0020] 3) Mix copper salt, zinc salt, silver salt, water and ethanol to form solution C;

[0021] 4) Add solution B and solution C dropwise to solution A at the same time, then stand still, dry and grind to obtain a powder object;

[0022] 5) Calcining the powder object to obtain a titanium dioxide-based composite solid catalyst;

[0023] 6) Soak the titanium dioxide-based composite solid catalyst, zinc chloride, and niobium pentachloride in hydrochloric acid, and then dry to obtain a titanium dioxide-based composite / Lewis acid composition.

[0024] In step 1) of the present invention, the amount of each material can be in a wide range, but in order to further improv...

Embodiment 1

[0038] 1) Mix tetrabutyl titanate, graphene, dimethylformamide, and ethanol in a weight ratio of 20:8:50:60 (mixing temperature is 25°C, mixing time is 50 minutes) to form solution A;

[0039] 2) Mix water, ethanol and acetic acid according to the weight ratio of 5:23:2.5 (mixing temperature is 25°C, mixing time is 50min) to form solution B;

[0040] 3) Mix copper salt (copper sulfate), zinc salt (zinc sulfate), silver salt (silver nitrate), water, and ethanol in a weight ratio of 10:3:0.5:23:18 (mixing temperature is 25°C, mixing time 50min) to form solution C;

[0041] 4) Add solution B and solution C dropwise to solution A at the same time (the volume ratio of solution A, solution B and solution C is 100:23:10), and then stand still (the stand temperature is 15°C, and the stand time is 20h), drying (drying temperature is 105°C, drying time is 8h), grinding to obtain powder objects;

[0042] 5) The powder object was calcined (from 25°C at 2.3°C / min to 330°C and held for 35...

Embodiment 2

[0044]1) Mix tetrabutyl titanate, graphene, dimethylformamide, and ethanol at a weight ratio of 20:5:40:50 (mixing temperature is 15°C, mixing time is 60 minutes) to form solution A;

[0045] 2) Mix water, ethanol and acetic acid in a weight ratio of 5:20:2 (mixing temperature is 15°C, mixing time is 60 minutes) to form solution B;

[0046] 3) Mix copper salt (copper chloride), zinc salt (zinc chloride), silver salt (silver nitrate), water, and ethanol in a weight ratio of 10:2:0.2:20:15 (mixing temperature is 15°C, The mixing time is 60min) to form solution C;

[0047] 4) Add solution B and solution C dropwise to solution A at the same time (the volume ratio of solution A, solution B and solution C is 100:20:8), and then stand still (the stand temperature is 10°C, and the stand time is 24h), drying (drying temperature is 100°C, drying time is 10h), grinding to obtain powder objects;

[0048] 5) The powder object was calcined (from 15°C at 2°C / min to 300°C and held for 30 mi...

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PUM

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Abstract

The invention discloses a titanium-dioxide-based compound / lewis acid composition for preparing allantion and a preparing method of the titanium-dioxide-based compound / lewis acid composition. The preparing method comprises the steps of 1, mixing tetrabutyl titanate, graphene, dimethyl formamide and ethyl alcohol to form a solution A; 2, mixing water, ethyl alcohol and acetic acid to form a solutionB; 3, mixing copper salt, zinc salt, silver salt, water and ethyl alcohol to form a solution C; 4, dropwise adding the solution B and the solution C into the solution A simultaneously, and conductingstanding, drying and grinding to obtain a powdery object; 5, roasting the powdery object to prepare a titanium-dioxide-based compound solid catalyst; 6, soaking the titanium-dioxide-based compound solid catalyst, zinc chloride and columbium pentachloride in hydrochloric acid, and then drying to prepare the titanium-dioxide-based compound / lewis acid composition. The titanium-dioxide-based compound / lewis acid composition has an excellent effect on catalyzing the synthesis of allantion; meanwhile, the preparing method has the advantages that the procedures are simple and the raw materials are easy to obtain.

Description

technical field [0001] The invention relates to allantoin, in particular to a titanium dioxide-based complex / Lewis acid composition for preparing allantoin and a preparation method thereof. Background technique [0002] Allantoin, English name Allantion, chemical name 1-ureidodiazolane-2,4-dione, is an important fine chemical product with a wide range of uses. Allantoin has physiological functions such as promoting the growth of skin epithelial cells, healing sores, relieving pain, and softening keratin. It is also non-toxic, non-irritating, non-allergic, has light-proof, bactericidal, anti-corrosion, and anti-oxidation effects, and can keep the skin hydrated. , Moisturizing and soft, so it is widely used in the production of medicine and cosmetics. In addition, allantoin also has the function of stimulating biological growth, and can be used as a plant growth regulator in agricultural production, with effects such as fruit strengthening, ripening, and yield increase. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/138C07D233/88
CPCC07D233/88B01J27/138B01J27/10B01J23/8953B01J35/19
Inventor 茆振斌
Owner 茆振斌