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Catalyst and its preparation method and regeneration method of anthraquinone degradation products

A technology of catalysts and compounds, applied in chemical instruments and methods, preparation of organic compounds, physical/chemical process catalysts, etc., can solve problems such as complex preparation process, reduced regeneration efficiency of degraded products, weak combination of carrier and active components, etc.

Active Publication Date: 2021-11-02
ZHEJIANG HENGYI PETROCHEMICAL RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the mechanical strength of the catalyst is relatively poor; on the other hand, the combination of the carrier and the active component is not firm, and the active component is easy to lose
[0006] CN105174299A discloses a catalyst with a two-layer or three-layer structure including silicon oxide, calcium oxide and alkali metal oxides, but the preparation process is relatively complicated, and layer-by-layer rolling ball forming has the problem of weak bonding between different shell layers, which causes shedding risk
[0007] The working liquid solvent system of traditional hydrogen peroxide production is heavy aromatics and trioctyl phosphate. Due to the low solubility of anthraquinone in it, the hydrogen efficiency is low. At present, many hydrogen peroxide devices in China have adopted the method of adding o-methylcyclohexyl to it. Acetate to improve the solubility of anthraquinone and thus improve the hydrogen efficiency
However, it has been found that o-methylcyclohexyl acetate will reduce the regeneration efficiency of clay or catalyst for degradation products
But how to improve catalyst for the regeneration efficiency of anthraquinone degradant in the hydrogen peroxide working fluid that contains o-methylcyclohexyl acetate, prior art does not have report

Method used

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  • Catalyst and its preparation method and regeneration method of anthraquinone degradation products

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preparation example Construction

[0018] The first aspect of the present invention provides a kind of preparation method for the catalyst of the anthraquinone degradation product in regeneration hydrogen peroxide working solution, and this method comprises the following steps:

[0019] S1. Mix the quick-release powder, the alkaline earth metal compound and an optional extrusion aid to obtain the first dry material;

[0020] S2. Mixing the acid solution and the silicon source to obtain the first liquid;

[0021] S3. After mixing the first dry material with the first liquid, kneading, extruding, drying and roasting are performed sequentially.

[0022] According to the method of the present invention, S1 and S2 are in no particular order.

[0023] According to the method of the present invention, the quick-release powder can be activated alumina produced from gibbsite or bayerite, which can be a commercially available product. In a preferred situation, the specific surface area of ​​the quick-release powder can...

Embodiment 1

[0048] S1. Mix 131.25g of quick-release powder, 4.5g of turnip powder, 15.0g of calcium oxide powder and 0.75g of manganese dioxide powder to obtain the first dry material;

[0049] S2, the content of 105.0g is the nitric acid solution of 5% by weight and the content of 10.0g is the silica sol of 30% by weight (as SiO 2 Meter) solution is mixed, stirs to obtain the first liquid;

[0050] S3. Mix the first dry material with the first liquid, then knead and extrude the obtained strips in the shade at room temperature for 24 hours, then dry them at 110°C for 6 hours, and then The temperature was raised to 600°C at a heating rate of 4°C / min, and calcined for 4 hours to obtain a catalyst, which was designated as C1.

[0051] Based on the total weight of the catalyst, the content of the activated alumina is 87.5% by weight, the content of the alkaline earth metal oxide is 10% by weight, the content of the manganese dioxide is 0.5% by weight, and the content of the silicon dioxide ...

Embodiment 2

[0054] S1. Mix 132.0 g of quick-release powder, 4.5 g of scallop powder and 15.0 g of calcium oxide powder to obtain the first dry material;

[0055] S2, the content of 105.0g is the nitric acid solution of 5% by weight and the content of 10.0g is the silica sol of 30% by weight (as SiO 2 Meter) solution is mixed, stirs to obtain the first liquid;

[0056] S3. Mix the first dry material with the first liquid, then knead and extrude the obtained strips in the shade at room temperature for 24 hours, then dry them at 110°C for 6 hours, and then The temperature was raised to 600°C at a heating rate of 4°C / min, and calcined for 4 hours to obtain a catalyst, which was designated as C2.

[0057] Based on the total weight of the catalyst, the content of the activated alumina is 88% by weight, the content of the alkaline earth metal oxide is 10% by weight, and the content of the silicon dioxide is 2% by weight.

[0058] The mechanical strength of the catalyst is shown in Table 1.

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Abstract

The invention relates to the field of regeneration of anthraquinone degradation products, and discloses a catalyst, a preparation method thereof and a regeneration method of anthraquinone degradation products. The preparation method of the catalyst comprises the following steps: S1, mixing the quick-release powder, the alkaline earth metal compound and an optional extrusion aid to obtain the first dry material; S2, mixing the acid solution and the silicon source to obtain the first Liquid; S3, mixing the first dry material with the first liquid, followed by kneading, extruding, drying and roasting. The preparation method of the catalyst is simple and low in cost, and can effectively improve the regeneration efficiency of anthraquinone degradation products in the hydrogen peroxide working solution containing o-methylcyclohexyl acetate, significantly reduce the accumulation of anthraquinone degradation products in the working solution and improve the working efficiency. The content of effective anthraquinone in the liquid is beneficial to improve production efficiency.

Description

technical field [0001] The invention relates to the field of regeneration of anthraquinone degradation products, in particular to a catalyst, a preparation method thereof and a regeneration method of anthraquinone degradation products. Background technique [0002] As a recognized bulk green chemical, hydrogen peroxide is widely used in papermaking, printing and dyeing, chemical and other fields. In recent years, with the gradual commissioning of cyclohexanone ammoximation to caprolactam and propylene epoxidation to propylene oxide in China, the amount of hydrogen peroxide has shown a steady growth trend. At present, the method for large-scale production of hydrogen peroxide in industry is mainly the anthraquinone method. [0003] In the process of preparing hydrogen peroxide by anthraquinone method, heavy aromatic hydrocarbons are usually used as solvents for dissolving anthraquinone, and polar solvents such as trioctyl phosphate and o-methylcyclohexyl acetate are used as ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/14B01J23/02B01J23/34C07C46/00C07C50/16C07C50/18
CPCB01J23/002B01J23/02B01J23/34B01J2523/00C07C46/00B01J2523/31B01J2523/23B01J2523/41B01J2523/72B01J2523/22C07C50/16C07C50/18Y02P20/584
Inventor 程义梁希慧孔振飞朱朝莹王韩徐锦龙王松林
Owner ZHEJIANG HENGYI PETROCHEMICAL RES INST CO LTD
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