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Ferric oxide-based complex/sulfuric acid/boric acid composition for catalytic preparation of allantoin as well as preparation method thereof

An iron oxide-based, catalytic preparation technology, applied in the field of allantoin, can solve the problems of polluted environment, not very excellent catalytic effect, low yield of allantoin and the like

Inactive Publication Date: 2018-11-13
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

[0014] The invention provides a method for preparing an iron oxide-based complex / sulfuric acid / boric acid composition that catalyzes the preparation of allantoin, comprising:

[0015] 1) Disperse ferric salt, bismuth source, manganese source, cobalt source, and polyvinyl alcohol in water, then add alkali for contact reaction, then add anionic surfactant for secondary reaction, and then extract the system through the extractant And take the organic phase, finally remove the extractant and dry to obtain the reaction product;

[0016] 2) Calcining the reaction product to obtain an iron oxide-based composite;

[0017] 3) Mix the iron oxide-based composite, sulfuric acid solution, and boric acid solution, and then filter to obtain a filter cake to obtain an iron oxide-based composite / sulfuric acid / boric acid composition.

[0018] In step 1) of the above preparation method, the amount of each material can be selected within a wide range, but in order to further improve the catalyti...

Embodiment 1

[0031] 1) Disperse ferric salt (ferric chloride), bismuth source (bismuth laurate), manganese source (manganese nitrate), cobalt source (cobalt naphthenate), and polyvinyl alcohol in water, then add alkali for contact reaction (reaction temperature is 25°C, reaction time is 1.5h), and then anionic surfactant (sodium dodecylbenzenesulfonate) is added for secondary reaction (reaction temperature is 70°C, reaction time is 4h, ferric iron The weight ratio of salt, bismuth source, manganese source, cobalt source, polyvinyl alcohol, alkali, anionic surfactant, and water is 10:0.08:2.5:1:6:10:13:80), and then the system is passed through the extractant (chloroform) for extraction (the volume ratio of the system to the extractant is 1:4) and take the organic phase, and finally remove the extractant and dry to obtain the reaction product;

[0032] 2) The reaction product was calcined (from 25°C at 2°C / min to 280°C and held for 50 minutes, then at 0.9°C / min to 530°C and held for 4 hours...

Embodiment 2

[0034] 1) Disperse ferric salt (ferric sulfate), bismuth source (bismuth isooctanoate), manganese source (manganese acetate), cobalt source (cobalt stearate), and polyvinyl alcohol in water, then add alkali for contact reaction ( The reaction temperature is 15°C, the reaction time is 2h), and then an anionic surfactant (sodium lauryl sulfate) is added for secondary reaction (the reaction temperature is 60°C, the reaction time is 5h, ferric salt, bismuth source, The weight ratio of manganese source, cobalt source, polyvinyl alcohol, alkali, anionic surfactant, and water is 10:0.06:2:0.5:4:8:10:60), and then the system is passed through the extractant (carbon tetrachloride ) for extraction (the volume ratio of the system to the extractant is 1:3) and take the organic phase, and finally remove the extractant and dry to obtain the reaction product;

[0035] 2) The reaction product was calcined (from 15°C at 1.8°C / min to 260°C and held for 40 minutes, then at 0.7°C / min to 520°C and...

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Abstract

The invention discloses a ferric oxide-based complex / sulfuric acid / boric acid composition for catalytic preparation of allantoin as well as a preparation method thereof. The preparation method comprises the following steps: 1) dispersing ferric salt, a bismuth source, a manganese source, a cobalt source and polyvinyl alcohol into water, adding alkali to perform contact reaction, adding an anionicsurfactant to perform secondary reaction, performing reaction on the system by an extracting agent to take an organic phase, removing the extracting agent and drying to prepare a reaction product; 2)calcining the reaction product to prepare a ferric oxide-based complex; and 3) mixing the ferric oxide-based complex, a sulfuric acid solution and a boric acid solution and filtering to take a filtercake to prepare the ferric oxide-based complex / sulfuric acid / boric acid composition. The composition can effectively catalyze synthesis of the allantoin; and according to the preparation method, the process is simple and the raw materials are easily available.

Description

technical field [0001] The invention relates to allantoin, in particular to an iron oxide-based complex / sulfuric acid / boric acid composition which catalyzes the preparation of 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, rip...

Claims

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Application Information

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IPC IPC(8): B01J27/02C07D233/88
CPCB01J27/02C07D233/88
Inventor 茆振斌
Owner 茆振斌
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