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Preparation method of ozone catalytic oxidation catalyst used for treating oil refining waste water

A technology for catalytic oxidation of ozone and refinery wastewater, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve catalyst specific surface area and pore volume loss, catalyst preparation Complex process, affecting catalyst adsorption, catalytic performance and other issues, to achieve the effect of simple preparation steps

Active Publication Date: 2011-03-02
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the catalyst is prepared by the impregnation method, and the loading of active components inevitably leads to the loss of the specific surface area and pore volume of the catalyst, which affects the adsorption and catalytic performance of the catalyst, and the catalyst preparation process is complicated.

Method used

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  • Preparation method of ozone catalytic oxidation catalyst used for treating oil refining waste water

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Get 110g FeOOH powder (commercially available commodity; Powder specific surface area 125m 2 / g) and 5kg amorphous alumina (commercially available, powder specific surface area 260m 2 / g) Mix evenly, use water as a binder to perform rolling granulation until the particle size is 3mm, stop at 101°C for 20hrs, dry at 110°C for 4hrs, and roast at 450°C for 3hrs to obtain an ozone catalytic oxidation catalyst.

[0023] Catalyst performance evaluation is achieved by the following devices:

[0024] Reactor: fixed bed reactor

[0025] Catalyst loading volume: 100ml, filling aspect ratio is 4:1

[0026] Temperature: room temperature

[0027] Residence time: 20min

[0028] Ozone generation: 4.5g / hr

[0029] Source of wastewater: Wastewater from a refinery, imported CODcr value before entering the ozone catalytic oxidation unit: 230-250mg / L.

[0030] The catalyst specific surface area and evaluation results are shown in Table 1.

Embodiment 2

[0032] The preparation of FeOOH is equivalent to containing Fe 2 o 3 The catalyzer of 5% amount, all the other catalyst preparation steps are with embodiment 1.

[0033] The catalyst was tested as in Example 1, and its catalyst specific surface area and evaluation results are shown in Table 1.

Embodiment 3

[0035] Silica sol was selected as the binder during the rolling molding of the catalyst, and the rest of the preparation steps of the catalyst were the same as in Example 1.

[0036] The catalyst was tested as in Example 1, and its catalyst specific surface area and evaluation results are shown in Table 1.

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Abstract

The invention relates to a preparation method of ozone catalytic oxidation catalyst used for treating oil refining waste water. Amorphous aluminium oxide powder and ferric hydroxide powder are mixed by dry basis weight ratio of 100: 1-30, and rolling pelleting, maintaining, drying and roasting are carried out, thus obtaining the finished product catalyst. The method includes the following steps: (a) amorphous aluminium oxide and ferric hydroxide powder are mixed to be uniform; (b) the mixture is placed into a rotary pelleting machine, binder is sprayed, and rolling pelleting is carried out, the binder is sprayed in solution or colloid form in an atomizing way, and the amount of binder sprayed into the pelleting machine is 2-50% of total mass of amorphous aluminium oxide; and diameter of pelleting is controlled to be 1-8mm; (c) particle matter is maintained for 3-24 hours under the condition that temperature of water vapour is 100-110 DEG C; (d) catalyst is dried, drying temperature is 50-180 DEG C, drying time is 2-10 hours, and then roasting is carried out; and roasting temperature of catalyst is 400-600 DEG C, roasting time is 2-8 hours, and finished product catalyst is obtained.

Description

Technical field: [0001] The invention relates to the field of catalyst manufacturing, and is a method for preparing an ozone catalytic oxidation catalyst for oil refinery wastewater, aiming to provide a production method of a highly active ozone catalytic oxidation catalyst with simple preparation process, convenient operation, environmental protection and good economical efficiency . The catalyst of the invention is mainly used for the efficient removal of organic pollutants in oil refinery wastewater by the ozone catalytic oxidation method. Background of the invention: [0002] Refinery wastewater is a type of wastewater generated during crude oil refining and processing. In recent years, with the continuous increase of production capacity, the discharge of high-concentration organic wastewater from enterprises has continued to increase. At the same time, the country has raised the water quality COD index of discharged wastewater from ≤100mg / L to ≤60mg / L. pressure contin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745C02F1/78
Inventor 于海斌孙彦民苗静李晓云曾贤君李世鹏
Owner CHINA NAT OFFSHORE OIL CORP
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