Unlock instant, AI-driven research and patent intelligence for your innovation.

Spherical silicon dioxide catalyst for catalytic ozonation of wastewater as well as preparation method and application of spherical silicon dioxide catalyst

A technology for catalytic oxidation of spherical silica and ozone, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of insufficient catalytic effect and decreased catalyst efficiency Larger problems, to achieve the effect of improving ozone utilization rate, long service life, and reducing residence time

Pending Publication Date: 2022-01-18
SHANDONG PROVINCE METALLURGICAL ENG CO LTD
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The inventors found that there are still deficiencies in the prior art, such as the catalytic effect is not good enough, and long-term continuous operation, the efficiency of the catalyst drops greatly

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Spherical silicon dioxide catalyst for catalytic ozonation of wastewater as well as preparation method and application of spherical silicon dioxide catalyst
  • Spherical silicon dioxide catalyst for catalytic ozonation of wastewater as well as preparation method and application of spherical silicon dioxide catalyst

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0021] Specifically, the preparation method comprises the steps of:

[0022] (1) Take the silica to produce spherical particles, high temperature burn to the silica ball;

[0023] (2) Take the silica ball of step (1) placed in nitric acid or hydrochloric acid solution, then washed to neutral, dry the silica ball branger;

[0024] (3) Put PTO 2 Mno 2 , CO 3 O 4 , TIO 2 , Fe 2 O 3 , NIO, CUO is configured to composite catalytically active powder in accordance with a certain proportion of nitric acid or sulfuric acid into a metal salt solution;

[0025] (4) Immersion the silica ball in the metal salt solution, the immersion time is 5-15 h;

[0026] (5) Dry the silica ball after impregnation;

[0027] (6) The dried silica ball is carried out in ammonia gas, and the calcination temperature is 500-800 ° C, and the calcination time is 2-6 h;

[0028] (7) Take out of the baked silica ball and cool at room temperature;

[0029] (8) Repeat (4), (5), (6), (7) step at least twice, resulting i...

Embodiment 1

[0041] (1) Take the silica to create spherical particles, the ball particles are 4 mm, dry, then firmed at 800 ° C for 4.5 h, and silica ball particles;

[0042](2) from step (1) silica pellets was placed 5% by mass concentration of nitric acid or hydrochloric acid solution soaked 8min, then rinsed with water to neutral pH 7, dried with hot air of 90 deg.] C to give pellets of silica skeleton;

[0043] (3) The PtO 2 , MnO 2 , CO 3 O 4 , TIO 2 , NiO, CuO, Fe 2 O 3 According to 0.5%, 6%, 4%, 1.5%, 1.2%, 5%, 81.8% of the proportion of the catalytically active complex is configured to be formulated as powder and metal salt solution of sulfuric acid, at a concentration of 0.5mol / L, standby;

[0044] (4) The silica pellets was immersed in a metal salt solution, the immersion time of 10H;

[0045] (5) The silica pellets after immersion drained, dried at room temperature, then dried for 3h in the environment of 100 deg.] C;

[0046] (6) drying the silica pellets in a high temperature fi...

Embodiment 2

[0051] (1) Take a silica made spherical grains, pellets having a diameter of 6mm, dried, and then fired at about 700 deg.] C 5h, to obtain pellets of silica;

[0052] (2) from step (1) silica pellets was placed a solution of 3% by mass concentration of nitric acid immersion 6min, then rinsed with water to neutral pH 7, dried with hot air of 95 deg.] C to give silica pellets skeleton;

[0053] (3) The PtO 2 , MnO 2 , CO 3 O 4 , TIO 2 , NiO, CuO, Fe 2 O 3 According to 1%, 6%, 3.5%, 1.5%, 2%, 5%, 81% proportion of the catalytically active powder is a composite arranged with nitric acid or sulfuric acid formulated as a metal salt solution at a concentration of 0.6mol / L;

[0054] (4) The silica pellets was immersed in a metal salt solution, the immersion time of 15H;

[0055] (5) The silica pellets after immersion drained, dried at room temperature for 3h and then dried at 105 ℃'s environment;

[0056] (6) drying the silica pellets in a high temperature firing in an ammonia gas, the ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to the technical field of catalysts, in particular to a spherical silicon dioxide catalyst for catalytic ozonation of wastewater and a preparation method and application thereof. The preparation method comprises the following steps: preparing composite catalytically-active powder from PtO2, MnO2, CO3O4, TiO2, Fe2O3, NiO and CuO in proportion, then preparing a metal salt solution from the composite catalytically-active powder and nitrate or sulfate, soaking the metal salt solution in a spherical silicon dioxide skeleton which is sintered at high temperature, and performing high-temperature calcination multiple times to obtain the spherical silicon dioxide catalyst for catalytic ozonation of wastewater. The catalyst is high in catalytic efficiency, improves an ozone utilization rate, further reduces the COD value of effluent, shortens retention time, slows down the attenuation of the catalytic effect of the catalyst and longer in service life, and therefore, the economic cost of a sewage treatment plant is reduced on the whole.

Description

Technical field [0001] The present invention relates to the field of catalyst, and more particularly to a spherical silica catalyst for wastewater ozone catalytic oxidation and a preparation method thereof. Background technique [0002] The information disclosed in the background is disclosed only to increase the understanding of the overall background of the present invention, and is not necessarily considered to admit or imply that the information is intended to be a prior art known to those skilled in the art. [0003] With the rapid development of the industry, the amount and type of industrial wastewater increased rapidly, and its pollution to the water is also increasingly serious, threatening people's health. The organic material concentration of high hard wastewater is high, and COD is generally more than 2000mg / l, some even up to tens of thousands of mg / L, but the BOD is low, and the ratio of many wastewater BOD and COD is less than 0.3, which is poorly chemically. I...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J35/08C02F1/78B01J35/10B01J35/02
CPCB01J23/8986C02F1/78B01J35/40B01J35/51B01J35/617
Inventor 申金涛冯林艺李腾李全兴
Owner SHANDONG PROVINCE METALLURGICAL ENG CO LTD