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Sponge ceramic catalyst as well as preparation method and application thereof in tap water treatment

A technology of ceramic catalyst and tap water, which is applied in the direction of catalyst activation/preparation, oxidized water/sewage treatment, water/sewage treatment, etc. It can solve the problems of difficult separation of impurities, unsatisfactory stability and mechanical strength, and low specific surface area. The effect of high sintering degree, high stability and large specific surface area

Active Publication Date: 2019-07-12
杭州浙大易泰环境科技有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Traditional ceramics usually have few pores, low specific surface area, and brittleness problems. Their application effect in water treatment needs to be improved, while the stability and mechanical strength of traditional catalysts such as activated carbon catalysts and molecular sieve catalysts cannot meet the needs of water. Requirements for processing, difficult to separate and easy to introduce impurities, so it is of great significance to develop a catalyst that not only meets the mechanical properties but also has high activity

Method used

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  • Sponge ceramic catalyst as well as preparation method and application thereof in tap water treatment
  • Sponge ceramic catalyst as well as preparation method and application thereof in tap water treatment
  • Sponge ceramic catalyst as well as preparation method and application thereof in tap water treatment

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preparation example Construction

[0033] The process flow of the preparation method of the sponge ceramic catalyst of following embodiment is all as figure 1 shown, including steps:

[0034] (1) Grind and mix the raw materials evenly;

[0035] (2) adding solvent water to the raw material after grinding to form a colloid;

[0036] (3) colloidal air pressure into filaments to obtain filaments;

[0037] (4) winding and molding the filament to obtain a molded body;

[0038] (5) The formed body is calcined at low temperature to obtain the primary formed body;

[0039] (6) The primary molded body is calcined at high temperature to obtain a sponge ceramic catalyst.

Embodiment 1

[0041] (1) Raw materials: diatomite, zirconia, zinc oxide, sodium silicate, copper nitrate, iron nitrate, cerium nitrate, and platinum nitrate in a mass ratio of 15:6:3:3:2:1:1:1.

[0042] (2) Raw material pretreatment: mix the raw materials and put them into a ball mill to grind until they can pass through a 300-mesh sieve, and mix thoroughly to obtain a powder. Add water to the powder, the volume ratio is 1:4, mix well to form a colloid.

[0043] (3) Pneumatic molding: use a high-pressure molding machine to control the pressure at 300 MPa, extrude the colloid into filaments to obtain filaments, and wrap the filaments in a winding molding machine to form them.

[0044](4) Calcination stage: low-temperature calcination: put the winding molded body into the muffle furnace, and raise the temperature to 500°C at a rate of 5°C / min, keep it for 2h, and calcinate to remove the moisture mixed into the powder to obtain the primary Molded body; high-temperature calcination: raise the ...

Embodiment 2

[0047] (1) Raw material preparation: Diatomaceous earth, zirconia, zinc oxide, sodium silicate, copper nitrate, iron nitrate, cerium nitrate, platinum nitrate according to the mass ratio of 21:8:2:3:2:1:1:1 .

[0048] (2) Raw material pretreatment: mix the raw materials and put them into a ball mill to grind until they can pass through a 300-mesh sieve, and mix thoroughly to obtain a powder. Add water to the powder, the volume ratio is 1:4, mix well to form a colloid.

[0049] (3) Pneumatic molding: use a high-pressure molding machine to control the pressure at 500 MPa, extrude the colloid into filaments to obtain filaments, and wrap the filaments in a winding molding machine to form them.

[0050] (4) Calcination stage: low-temperature calcination: put the winding molded body into the muffle furnace, and raise the temperature to 500°C at a rate of 5°C / min, keep it for 2h, and calcinate to remove the moisture mixed into the powder to obtain the primary Formed body. High-tem...

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Abstract

The invention discloses a preparation method of a sponge ceramic catalyst. The preparation method of the sponge ceramic catalyst comprises the following steps: mixing raw materials with water to forma colloid, carrying out air-pressure filamentation on the colloid to obtain a filament-shaped body and then winding to form a molded body; the sponge ceramic catalyst comprises the raw materials of 15to 30 parts of diatomaceous earth, 5 to 10 parts of zirconia, 2 to 5 parts of zinc oxide, 3 to 5 parts of sodium silicate, 1 to 4 parts of copper nitrate and 1 to 4 parts of iron nitrate and furthercomprises cerium nitrate and / or platinum nitrate which is not less than 1 part calculated in parts by mass; the molded body is subjected to gradient calcination to obtain the sponge ceramic catalyst;the first-stage calcination temperature of the gradient calcination is 300 to 600 DEG C, the time is 1 to 4 hours, and the second-stage calcination temperature of the gradient calcination is 1000 to 1300 DEG C, and the time is 2 to 4 hours. The invention further discloses the sponge ceramic catalyst prepared according to the preparation method and application of the sponge ceramic catalyst in theadvanced treatment of tap water. The sponge ceramic catalyst is combined with ozone for catalytic oxidation, thereby being capable of removing the color, turbidity and peculiar smells of tap water, degrading a part of organic substances in tap water, and inactivating microorganisms.

Description

technical field [0001] The invention relates to the technical field of tap water protection, in particular to a sponge ceramic catalyst, a preparation method thereof and an application in tap water treatment. Background technique [0002] Tap water supply is the lifeline project of the city, which has a great impact on the survival of the city, the national economy and the people's livelihood. However, water pollution in my country is becoming more and more serious, which seriously threatens the safety of tap water. The main pollution is dissolved organic chemicals, such as antibiotics, volatile phenols, and pesticides. For a long time, most waterworks in my country have adopted the classic treatment process of "coagulation-sedimentation-filtration-disinfection". Sudden organic pollution of water quality has led to risks in ensuring the normal supply of tap water. Therefore, there is an urgent need to develop advanced water treatment guarantee technology to ensure water sup...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J35/06B01J35/04B01J37/08B01J23/80C02F1/78C02F1/72C02F1/50C02F101/30
CPCB01J37/082B01J37/088B01J23/80C02F1/78C02F1/725C02F1/50C02F2101/30C02F2303/04B01J35/58B01J35/56
Inventor 官宝红潘建王罡
Owner 杭州浙大易泰环境科技有限公司
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