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Peroxide catalytic oxidation catalyst, and method for treating epoxypropane and styrene coproduction wastewater by using same

A technology of catalytic oxidation and peroxide, applied in organic compound/hydride/coordination complex catalysts, oxidized water/sewage treatment, physical/chemical process catalysts, etc., can solve difficult process safety and stability, oxygen generation Large amount, long reaction time and other problems, to achieve the effect of high thermodynamic stability, low cost of use, and large load capacity

Active Publication Date: 2020-05-15
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The treatment methods currently used include sodium thiosulfate reduction process, alkali decomposition process, fluidized bed catalytic decomposition and enzymatic decomposition process, etc., but the above methods have low removal efficiency, long reaction time, high operating cost and large oxygen generation. Disadvantages, it is difficult to essentially improve the safety and stability of the process
[0003] Invention patent CN1675178A discloses a peroxide catalytic decomposition process, which uses a soluble catalyst such as acetylacetonate to decompose peroxide into oxygen, but it introduces metal ions into the waste water, and the decomposition product is mainly oxygen, which produces oxygen. large
[0005] However, at present, there are few studies on the catalytic oxidation process of PO / SM peroxide wastewater, and there is no relatively mature heterogeneous catalyst product. Most of the research is still focused on the catalytic decomposition process, but in fact the active metals, carriers and loading methods in the catalyst It has a direct decisive effect on the catalytic oxidation efficiency. Therefore, it is urgent to develop a peroxide catalytic oxidation catalyst suitable for treating PO / SM peroxide wastewater, and a high-efficiency peroxide catalytic oxidation process for PO / SM wastewater

Method used

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  • Peroxide catalytic oxidation catalyst, and method for treating epoxypropane and styrene coproduction wastewater by using same

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Embodiment 1: the preparation of 1# catalyst

[0057] Take 20g of the dried sludge sample and place it in a dipping bottle for vacuum pretreatment. The vacuum pretreatment time is 60min, and the vacuum degree is 98.0KPa (gauge pressure); 2 0.20g / mL methanol solution 1.0mL, containing CholineCl-NiCl 2 Add 1.4 mL of 0.15 g / mL methanol solution to methanol aqueous solution with a methanol concentration of 10 wt % to prepare an impregnation solution with a total volume of 20 mL. Add the above impregnation liquid into the vacuum impregnation bottle equipped with the above dried sludge carrier and mix evenly, impregnate the above dried sludge carrier with equal volume, after immersion for 30 minutes, take it out and dry it in an oven at 150°C for 5 hours, Then it was calcined at 400° C. for 5 hours in a muffle furnace to obtain 1# catalyst.

[0058] In the 1# catalyst of gained, take the weight of dried sludge wherein as basis, the content of following composition is as f...

Embodiment 2

[0059] Embodiment 2: the preparation of 2# catalyst

[0060] Get dried sludge sample 20g and place in dipping bottle, carry out vacuum pretreatment, vacuum pretreatment time is 10min, and vacuum degree is 96.0KPa (gauge pressure); Add it into an ethanol aqueous solution with an ethanol concentration of 10 wt%, and prepare an impregnation solution with a total volume of 20.0 mL. Add the above impregnating solution into the vacuum impregnation bottle with dried sludge carrier and mix evenly, then impregnate the above dried sludge carrier with an equal volume. After soaking for 30 minutes, take it out and dry it in an oven at 150°C for 5 hours, and then put it in the Roast at 400°C for 5 hours in a muffle furnace to prepare the cerium-modified dry sludge carrier. In the prepared cerium-modified dried sludge carrier, the content of cerium is 1.0wt% based on the weight of dried sludge.

[0061] Get above-mentioned cerium modified dry sludge sample 20g and place in dipping bottle,...

Embodiment 3

[0063] Embodiment 3: the preparation of 3# catalyst

[0064] Get dried sludge sample 20g and place in dipping bottle, carry out vacuum pretreatment, vacuum pretreatment time is 10min, and vacuum degree is 96.0KPa (gauge pressure); Add it into an ethanol aqueous solution with an ethanol concentration of 10 wt%, and prepare an impregnation solution with a total volume of 20.0 mL. Add the above impregnating liquid into the vacuum impregnation bottle equipped with the dried sludge carrier and mix evenly, then impregnate the above dried sludge carrier with equal volume. After soaking for 240min, take it out and dry it in an oven at 60°C for 1h, and then put it in the Roast at 300°C for 3 hours in a muffle furnace to prepare a cerium-modified dry sludge carrier. In the prepared cerium-modified dried sludge carrier, the content of cerium is 1.0wt% based on the weight of dried sludge.

[0065]Get above-mentioned cerium modified dry sludge sample 20g and place in dipping bottle, carr...

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Abstract

The invention discloses a peroxide catalytic oxidation catalyst, and a method for treating epoxypropane and styrene coproduction wastewater by using the same. The catalyst comprises a carrier and active components, the carrier is dried sludge, and the active components are choline chloride complexed manganese chloride and choline chloride complexed nickel chloride. When the catalyst is used for treating the epoxypropane and styrene coproduction wastewater, the removal rate of peroxides such as hydrogen peroxide, methyl hydrogen peroxide and ethylbenzene hydrogen peroxide in the wastewater is 95% or above, the COD removal effect is remarkable, macromolecular organic matters can be oxidized and broken into micromolecular acid, alcohol, carbon dioxide and water, and the biodegradability is greatly improved.

Description

technical field [0001] The invention relates to the technical field of chemical engineering and environmental engineering wastewater treatment, in particular to a peroxide catalytic oxidation catalyst and a method for treating propylene oxide co-production styrene wastewater. Background technique [0002] The propylene oxide / styrene (PO / SM) plant produces a large amount of peroxide wastewater, which has the characteristics of large water volume, high salt and organic content, and contains hydrogen peroxide, methyl hydroperoxide and ethylbenzene hydroperoxide Such as peroxides that are easy to self-decompose, the safety risk is great. The treatment methods currently used include sodium thiosulfate reduction process, alkali decomposition process, fluidized bed catalytic decomposition and enzymatic decomposition process, etc., but the above methods have low removal efficiency, long reaction time, high operating cost and large oxygen generation. The disadvantage is that it is d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/02C02F1/72C02F101/34
CPCB01J31/0292C02F1/725C02F2101/34
Inventor 范珍龙赵文凯曾凡雪王俊俊刘小高周波衡华刘俊叶建初张海峰张宏科华卫琦
Owner WANHUA CHEM GRP CO LTD
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