A kind of catalytic oxidation catalyst and preparation method thereof, and advanced treatment method of organic matter in mdi brine

A catalytic oxidation and advanced treatment technology, which is applied in the direction of oxidized water/sewage treatment, organic compound/hydride/coordination complex catalyst, special compound water treatment, etc., can solve the problem of catalyst metal loss and achieve high degree of automation, The process is simple and the removal efficiency of organic matter is high

Active Publication Date: 2022-08-05
WANHUA CHEM GRP CO LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a catalytic oxidation catalyst and a preparation method thereof, and an advanced treatment method for organics in MDI brine for the problem of catalyst metal loss when the catalytic oxidation method is used for advanced treatment of organic matter in MDI brine; Adding the catalytic oxidation catalyst of the present invention to MDI salt water can not only effectively improve the treatment effect of salt water, but also reduce or even avoid the loss of metal in the catalyst while ensuring the improvement of the catalytic oxidation effect

Method used

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  • A kind of catalytic oxidation catalyst and preparation method thereof, and advanced treatment method of organic matter in mdi brine

Examples

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Comparison scheme
Effect test

preparation example 1

[0079] Comparative Preparation Example 1 (Preparation of 1# Catalyst):

[0080] Take TiO 2 20g of the sample was placed in a dipping bottle and subjected to vacuum pretreatment. The vacuum pretreatment time was 10min, and the vacuum degree was 96.0KPa (absolute pressure). 2 10.0 mL of methanol solution containing FeCl with a concentration of 0.15 g / mL 3 13.3 mL of the methanol solution was added to the methanol aqueous solution with a methanol concentration of 10 wt % to prepare a dipping solution with a total volume of 30 mL. The above impregnation solution was then added to the 2 Vacuum impregnation bottle of carrier and mix well, TiO 2 The carrier was immersed in an excess volume of immersion solution. After immersion for 30 minutes, the immersed product was taken out and dried in an oven at 90°C for 2 hours, and then calcined at 300°C for 4 hours in a muffle furnace to obtain 1# catalyst.

[0081] In the obtained 1# catalyst, the carrier TiO 2 The weight is 1 meter, N...

preparation Embodiment 1

[0085] Preparation Example 1 (Preparation of 3# Catalyst):

[0086] Take TiO 2 20g of the sample was placed in a dipping bottle and subjected to vacuum pretreatment. The vacuum pretreatment time was 40min, and the vacuum degree was 97.0KPa (absolute pressure); at the same time, a concentration of 0.20g / mL containing EG-CholineCl-NiCl 2 10.0 mL of methanol solution containing EG-CholineCl-FeCl with a concentration of 0.30 g / mL 3 6.65 mL of the methanol solution was added to the methanol aqueous solution with a methanol concentration of 10 wt % to prepare a dipping solution with a total volume of 30 mL. The above impregnation solution was then added to the 2 Vacuum impregnation bottle of carrier and mix well, TiO 2 The carrier was immersed in an excess volume of immersion solution. After immersion for 60 minutes, the immersed product was taken out and dried in an oven at 120 °C for 2 hours, and then calcined in a muffle furnace at 300 °C for 4 hours to obtain 3# catalyst.

...

preparation Embodiment 2

[0088] Preparation Example 2 (Preparation of 4# Catalyst):

[0089] Take TiO 2 20g of the sample was placed in a dipping bottle and subjected to vacuum pretreatment. The vacuum pretreatment time was 10min, and the vacuum degree was 96.0KPa (absolute pressure); at the same time, a concentration of 0.20g / mL containing EG-CholineCl-NiCl 2 1.0mL of methanol solution containing EG-CholineCl-FeCl with a concentration of 0.15g / mL 3 1.4 mL of the methanol solution was added to the methanol aqueous solution with a methanol concentration of 10 wt% to prepare a dipping solution with a total volume of 20 mL. The above impregnation solution was then added to the 2 Vacuum impregnation bottle of carrier and mix well, TiO 2 The carrier was immersed in an excess volume of immersion solution. After immersion for 240 minutes, the immersed product was taken out and dried in an oven at 150°C for 5h, and then calcined at 400°C for 5h in a muffle furnace to obtain 4# catalyst.

[0090] In the ob...

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Abstract

The invention belongs to the technical field of wastewater treatment in chemical engineering and environmental engineering, and relates to a catalytic oxidation catalyst and a preparation method thereof, and a method for advanced treatment of organic matter in MDI brine. The catalyst comprises a carrier and an active component, wherein the carrier is titanium dioxide and the active component It is an organic neutral ligand-metal complex ionic liquid. The advanced treatment method includes: (1) adjusting the pH value of the MDI brine, and adding an oxidant for treatment; (2) contacting the MDI brine treated in step (1) with a catalytic oxidation catalyst to carry out catalytic oxidation reaction to obtain advanced treatment after the brine. The catalyst of the invention can reduce or even avoid the loss of metals in the catalyst while ensuring the improvement of the catalytic oxidation effect; the advanced treatment method is simple and feasible, has high treatment efficiency, and does not produce secondary pollution.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment in chemical engineering and environmental engineering, and more particularly relates to a catalytic oxidation catalyst and a preparation method thereof, and a method for advanced treatment of organic matter in diphenylmethane diisocyanate (hereinafter referred to as MDI) brine. Background technique [0002] During the condensation reaction of the MDI device, a large amount of caustic soda and pure water are usually used to neutralize and wash the intermediate products. During this process, a large amount of neutralized brine and washing water will be generated. After stripping pretreatment, chemical oxidation, adsorption, and then sent to chlor-alkali treatment. Now, in order to reduce the amount of brine and increase the concentration of salt, the neutralized brine and washing water have been classified, and the neutralized brine has been extracted, stripped, and catalytically oxidiz...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/22B01J31/02C02F1/72C02F1/76C02F101/34C02F101/38
CPCB01J31/2217B01J31/0292C02F1/725C02F1/766B01J2531/842B01J2531/847C02F2305/023C02F2101/38C02F2101/34C02F2101/345C02F2209/20C02F2209/10C02F2209/16
Inventor 范珍龙张宏科高学顺曾凡雪王俊俊周波衡华李永锋邢津铭
Owner WANHUA CHEM GRP CO LTD
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