Catalyst and preparation method thereof and regeneration method of anthraquinone degradation product

A catalyst and oxide technology, which is applied in chemical instruments and methods, preparation of organic compounds, chemical elements of heterogeneous catalysts, etc. Poor and other problems

Active Publication Date: 2019-08-09
ZHEJIANG HENGYI PETROCHEMICAL RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 trio

Method used

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  • Catalyst and preparation method thereof and regeneration method of anthraquinone degradation product

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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 the regeneration of anthraquinone degradation products, and discloses a catalyst and a preparation method thereof and a regeneration method of a anthraquinone degradation product. The preparation method of the catalyst comprises the following steps that S1, activated alumina, an alkaline earth metal compound and an optional squeezing aid are mixed to obtain afirst dry material; S2, an acid solution and a silicon source are mixed to obtain a first liquid; S3, the first dry material and the first liquid are mixed and subjected to kneading, extruding and shaping, drying and roasting. The preparation method of the catalyst is simple and low in cost, can effectively improve the regeneration efficiency of the anthraquinone degradation product in a hydrogenperoxide working fluid containing 2-methyl cyclohexyl acetate, obviously reduces the accumulation of the anthraquinone degradation product in the working fluid, and increases the content of effectiveanthraquinone in the working fluid, thereby being conductive to improving the 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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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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