Method for treating sewage utilizing oil refining waste catalyst

A technology for refining waste catalyst and treatment method, applied in the direction of adsorbed water/sewage treatment, etc., can solve the problems of oily sewage without better adsorption function, harsh regeneration conditions of adsorbent, and difficulty in multiple utilization of adsorbent, and achieve a good social economy. Benefit, ease of use, cost-saving effect

Active Publication Date: 2006-08-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the adsorbents used are activated carbon, synthetic molecular sieves or zeolites, which can reduce the COD of sewage to a certain extent, but have no better adsorption function for oily sewage, and once the adsorption is saturated, the quality of the effluent water will be quite different due to the penetration of the adsorbate. fluctuate greatly
In addition, the regeneration conditions of the above-mentioned adsorbents are relatively harsh. The regeneration methods currently used include heating, chemical methods, and wet air oxidation methods. These methods make it difficult to reuse the adsorbents and easily cause secondary pollution.

Method used

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  • Method for treating sewage utilizing oil refining waste catalyst
  • Method for treating sewage utilizing oil refining waste catalyst
  • Method for treating sewage utilizing oil refining waste catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] This example is an experiment of the adsorption effect of waste catalyst on oil refinery wastewater. Sewage COD is 154mg / L, spent catalyst composition is Al 2 o 3 The content is 52.1 wt%, SiO 2 The content is 42.4% by weight, P 2 o 5 The content is 0.38% by weight, other components such as Na 2 O, MgO, K 2 O, CaO, TiO 2 、Re 2 o 3 The equivalent content is 5.12% by weight.

[0026] Take 150mL of refining water, put it into a 250mL beaker, and start stirring at a speed of 150r / min. Sampling and measuring COD at regular intervals to obtain the instantaneous adsorption amount, and obtain the limit adsorption amount by drawing a curve. see results figure 1 . It can be seen from the results in the figure that the spent catalyst has a higher limit adsorption capacity for refinery water, and has a unique adsorption property for organic matter in refinery water.

Embodiment 2

[0028] This example is an experiment on the adsorption effect of waste catalysts on chemical wastewater. The sewage COD is 175.8mg / L, and the spent catalyst composition is Al 2 o 3 The content is 52.1 wt%, SiO 2 The content is 42.4% by weight, P 2 o 5 The content is 0.38% by weight, other components such as Na 2 O, MgO, K 2 O, CaO, TiO 2 、Re 2 o 3 The equivalent content is 5.12% by weight.

[0029] Get chemical water 150mL, carry out experiment according to embodiment 1 method, the result sees figure 2 . figure 2 It shows that the value of the limit adsorption capacity of spent catalyst to refinery water is moderate, and the spent catalyst has certain selectivity for the adsorption of different organic substances.

Embodiment 3

[0031] This example is an experiment on the adsorption effect of waste catalyst on urban sewage. The sewage COD is 212.6mg / L, and the spent catalyst composition is Al 2 o 3 The content is 52.1 wt%, SiO 2 The content is 42.4% by weight, P 2 o 5 The content is 0.38% by weight, other components such as Na2 O, MgO, K 2 O, CaO, TiO 2 、Re 2 o 3 The equivalent content is 5.12% by weight.

[0032] Get urban sewage 150mL, carry out experiment according to embodiment 1 method, the result sees image 3 . image 3 It shows that although the COD of urban sewage is higher, compared with industrial sewage, the organic matter in sewage is easier to be adsorbed, so the value of the limit adsorption capacity of spent catalyst is higher.

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Abstract

The invention relates to a method to process sewage by using catalyst that includes the following process: adsorbent of oil refining spent catalyst fully contacting the sewage to take organic adsorbing in the sewage; the oil refining spent catalyst contains molecular sieve, clay, and adhesive agent, ratio surface is 100-300m2g, hole volume is 0.01-0.4ml/g; using the gross weight of catalyst as benchmark, the content of Al2O3 is 45-70%, the content of SiO2 is 25-50%, the content of P2 O5 is 0.2-4%, the content of Fe2O3 is 0-0.5%, and the total content of Na2O, MgO, K2O, CaO, TiO 2, and Re2O3 is 3-8%. The invention has widely application range and has mild using condition. It could have good effect to process the sewage that the pH value is 2-10, and water temperature is 0-60 degree centigrade.

Description

technical field [0001] The invention relates to a method for treating sewage, in particular to a method for treating sewage by using spent oil refinery catalysts Background technique [0002] The water resource crisis in the 21st century will be the top of all kinds of resource crises in the world. my country is one of the countries seriously short of water, and the fresh water per capita is only 1 / 4 of the world average. Among the 669 cities in the country, 400 cities have insufficient water supply all year round, and 110 cities are seriously short of water. The economic loss caused by water shortage in my country reaches 120 billion yuan every year. [0003] To alleviate the shortage of water resources, we must start from two aspects. One is to save water, especially to increase the utilization rate of industrial water; the other is to find new available water resources. The most feasible way is to realize the reuse of sewage, that is, to reuse the treated waste water tha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28
Inventor 张莉于瑞红马欣李本高
Owner CHINA PETROLEUM & CHEM CORP
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